contaminant stringlengths 4 65 | derived_fields listlengths 2 2 | id stringlengths 31 113 | limit_name stringclasses 6
values | limit_unit stringlengths 1 18 ⌀ | limit_value stringlengths 1 31 | regulator stringclasses 3
values | source stringclasses 4
values | source_quote stringlengths 14 412 | url stringlengths 94 176 | verified_fields listlengths 1 3 | disagreements listlengths 2 2 ⌀ |
|---|---|---|---|---|---|---|---|---|---|---|---|
1,1,1-Trichloroethane | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-1-1-1-trichloroethane | MCL (Maximum Contaminant Level) | mg/L | 0.2 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | 1,1,1-Trichloroethane | 0.20 | 0.2 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-1-1-1-trichloroethane/ | [
"contaminant",
"limit_value"
] | null |
1,1,2-Trichloroethane | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-1-1-2-trichloroethane | MCL (Maximum Contaminant Level) | mg/L | 0.005 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | 1,1,2-Trichloroethane | 0.003 | 0.005 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-1-1-2-trichloroethane/ | [
"contaminant",
"limit_value"
] | null |
1,1-Dichloroethylene | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-1-1-dichloroethylene | MCL (Maximum Contaminant Level) | mg/L | 0.007 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | 1,1-Dichloroethylene | 0.007 | 0.007 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-1-1-dichloroethylene/ | [
"contaminant",
"limit_value"
] | null |
1,2,4-Trichlorobenzene | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-1-2-4-trichlorobenzene | MCL (Maximum Contaminant Level) | mg/L | 0.07 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | 1,2,4-Trichlorobenzene | 0.07 | 0.07 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-1-2-4-trichlorobenzene/ | [
"contaminant",
"limit_value"
] | null |
1,2-Dibromo-3-chloropropane (DBCP) | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-1-2-dibromo-3-chloropropane-dbcp | MCL (Maximum Contaminant Level) | mg/L | 0.0002 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | 1,2-Dibromo-3-chloropropane (DBCP) | zero | 0.0002 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-1-2-dibromo-3-chloropropane-dbcp/ | [
"contaminant",
"limit_value"
] | null |
1,2-dichloroethane | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-1-2-dichloroethane | Parametric value | μg/l | 3,0 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | 1,2-dichloroethane | 3,0 | μg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-1-2-dichloroethane/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
1, 2 dichloroethane | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-1-2-dichloroethane | Prescribed concentration or value (maximum) | µg/1 | 3.0 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | 1, 2 dichloroethane | 3.0 | µg/1 | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-1-2-dichloroethane/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
1,2-Dichloroethane | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-1-2-dichloroethane | MCL (Maximum Contaminant Level) | mg/L | 0.005 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | 1,2-Dichloroethane | zero | 0.005 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-1-2-dichloroethane/ | [
"contaminant",
"limit_value"
] | null |
1,2-Dichloropropane | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-1-2-dichloropropane | MCL (Maximum Contaminant Level) | mg/L | 0.005 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | 1,2-Dichloropropane | zero | 0.005 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-1-2-dichloropropane/ | [
"contaminant",
"limit_value"
] | null |
2,4,5-TP (Silvex) | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-2-4-5-tp-silvex | MCL (Maximum Contaminant Level) | mg/L | 0.05 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | 2,4,5-TP ( Silvex ) | 0.05 | 0.05 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-2-4-5-tp-silvex/ | [
"contaminant",
"limit_value"
] | null |
2,4-D | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-2-4-d | MCL (Maximum Contaminant Level) | mg/L | 0.07 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | 2,4-D | 0.07 | 0.07 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-2-4-d/ | [
"contaminant",
"limit_value"
] | null |
Acrylamide | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-acrylamide | Parametric value | μg/l | 0,10 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Acrylamide | 0,10 | μg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-acrylamide/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Acrylamide | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-acrylamide | Prescribed concentration or value (maximum) | µg/1 | 0.10 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Acrylamide | 0.10 | µg/1 | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-acrylamide/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Acrylamide | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-acrylamide | Treatment Technique | null | TT | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Acrylamide | zero | TT 8 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-acrylamide/ | [
"contaminant",
"limit_value"
] | null |
Alachlor | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-alachlor | MCL (Maximum Contaminant Level) | mg/L | 0.002 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Alachlor | zero | 0.002 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-alachlor/ | [
"contaminant",
"limit_value"
] | null |
Alpha particles | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-alpha-particles | MCL (Maximum Contaminant Level) | pCi/L | 15 picocuries per Liter (pCi/L) | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Alpha particles | none ---------- zero | 15 picocuries per Liter (pCi/L) | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-alpha-particles/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Aluminium | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-aluminium | Indicator parameter | μg/l | 200 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Aluminium | 200 | μg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-aluminium/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Aluminium | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-aluminium | Prescribed concentration or value (maximum) | µgA1/1 | 200 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Aluminium | 200 | µgA1/1 | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-aluminium/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Ammonium | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-ammonium | Indicator parameter | mg/l | 0,50 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Ammonium | 0,50 | mg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-ammonium/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Antimony | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-antimony | Parametric value | μg/l | 10 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Antimony | 10 | μg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-antimony/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Antimony | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-antimony | Prescribed concentration or value (maximum) | µgSb/1 | 5.0 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Antimony | 5.0 | µgSb/1 | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-antimony/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Antimony | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-antimony | MCL (Maximum Contaminant Level) | mg/L | 0.006 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Antimony | 0.006 | 0.006 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-antimony/ | [
"contaminant",
"limit_value"
] | null |
Arsenic | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-arsenic | Parametric value | μg/l | 10 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Arsenic | 10 | μg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-arsenic/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Arsenic | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-arsenic | Prescribed concentration or value (maximum) | µgAs/1 | 10 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Arsenic | 10 | µgAs/1 | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-arsenic/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Arsenic | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-arsenic | MCL (Maximum Contaminant Level) | mg/L | 0.010 as of 01/23/06 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | MCL or TT 1 (mg/L) 2 | Potential Health Effects from Long-Term Exposure Above the MCL (unless specified as short-term) | Sources of Contaminant in Drinking Water | Antimony | 0.006 | 0.006 | Increase in blood cholesterol; decrease in blood sugar | Discharge from petroleum refineries; fire retardants; ceramics; electron... | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-arsenic/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Asbestos (fiber > 10 micrometers) | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-asbestos-fiber-10-micrometers | MCL (Maximum Contaminant Level) | MFL | 7 MFL | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Asbestos (fiber > 10 micrometers) | 7 million fibers per liter (MFL) | 7 MFL | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-asbestos-fiber-10-micrometers/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Atrazine | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-atrazine | MCL (Maximum Contaminant Level) | mg/L | 0.003 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Atrazine | 0.003 | 0.003 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-atrazine/ | [
"contaminant",
"limit_value"
] | null |
Barium | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-barium | MCL (Maximum Contaminant Level) | mg/L | 2 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Barium | 2 | 2 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-barium/ | [
"contaminant",
"limit_value"
] | null |
Benzene | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-benzene | Parametric value | μg/l | 1,0 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Benzene | 1,0 | μg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-benzene/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Benzene | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-benzene | Prescribed concentration or value (maximum) | µg/1 | 1.0 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Benzene | 1.0 | µg/1 | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-benzene/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Benzene | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-benzene | MCL (Maximum Contaminant Level) | mg/L | 0.005 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Benzene | zero | 0.005 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-benzene/ | [
"contaminant",
"limit_value"
] | null |
Benzo(a)pyrene | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-benzo-a-pyrene | Parametric value | μg/l | 0,010 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Benzo(a)pyrene | 0,010 | μg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-benzo-a-pyrene/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Benzo(a)pyrene | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-benzo-a-pyrene | Prescribed concentration or value (maximum) | µg/1 | 0.010 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Benzo(a)pyrene | 0.010 | µg/1 | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-benzo-a-pyrene/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Benzo(a)pyrene (PAHs) | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-benzo-a-pyrene-pahs | MCL (Maximum Contaminant Level) | mg/L | 0.0002 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Benzo(a)pyrene (PAHs) | zero | 0.0002 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-benzo-a-pyrene-pahs/ | [
"contaminant",
"limit_value"
] | null |
Beryllium | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-beryllium | MCL (Maximum Contaminant Level) | mg/L | 0.004 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Beryllium | 0.004 | 0.004 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-beryllium/ | [
"contaminant",
"limit_value"
] | null |
Beta particles and photon emitters | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-beta-particles-and-photon-emitters | MCL (Maximum Contaminant Level) | millirems per year | 4 millirems per year | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Beta particles and photon emitters | none ---------- zero | 4 millirems per year | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-beta-particles-and-photon-emitters/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Bisphenol A | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-bisphenol-a | Parametric value | μg/l | 2,5 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Bisphenol A | 2,5 | μg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-bisphenol-a/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Boron | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-boron | Parametric value | mg/l | 1,5 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Boron | 1,5 | mg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-boron/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Boron | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-boron | Prescribed concentration or value (maximum) | mgB/1 | 1.0 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Boron | 1.0 | mgB/1 | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-boron/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Bromate | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-bromate | Parametric value | μg/l | 10 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Bromate | 10 | μg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-bromate/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Bromate | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-bromate | Prescribed concentration or value (maximum) | µgBrO3/1 | 10 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Bromate | 10 | µgBrO3/1 | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-bromate/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Bromate | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-bromate | MCL (Maximum Contaminant Level) | mg/L | 0.010 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Bromate | zero | 0.010 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-bromate/ | [
"contaminant",
"limit_value"
] | null |
Cadmium | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-cadmium | Parametric value | μg/l | 5,0 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Cadmium | 5,0 | μg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-cadmium/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Cadmium | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-cadmium | Prescribed concentration or value (maximum) | µgCd/1 | 5.0 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Cadmium | 5.0 | µgCd/1 | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-cadmium/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Cadmium | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-cadmium | MCL (Maximum Contaminant Level) | mg/L | 0.005 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Cadmium | 0.005 | 0.005 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-cadmium/ | [
"contaminant",
"limit_value"
] | null |
Carbofuran | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-carbofuran | MCL (Maximum Contaminant Level) | mg/L | 0.04 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Carbofuran | 0.04 | 0.04 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-carbofuran/ | [
"contaminant",
"limit_value"
] | null |
Carbon tetrachloride | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-carbon-tetrachloride | MCL (Maximum Contaminant Level) | mg/L | 0.005 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Carbon tetrachloride | zero | 0.005 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-carbon-tetrachloride/ | [
"contaminant",
"limit_value"
] | null |
Chloramines (as Cl2) | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-chloramines-as-cl2 | MRDL (Maximum Residual Disinfectant Level) | mg/L | MRDL=4.0 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Chloramines (as Cl2) | MRDLG=4 1 | MRDL=4.0 1 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-chloramines-as-cl2/ | [
"contaminant",
"limit_value"
] | null |
Chlorate | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-chlorate | Parametric value | mg/l | 0,25 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Chlorate | 0,25 | mg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-chlorate/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Chlordane | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-chlordane | MCL (Maximum Contaminant Level) | mg/L | 0.002 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Chlordane | zero | 0.002 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-chlordane/ | [
"contaminant",
"limit_value"
] | null |
Chloride | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-chloride | Indicator parameter | mg/l | 250 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Chloride | 250 | mg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-chloride/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Chlorine (as Cl2) | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-chlorine-as-cl2 | MRDL (Maximum Residual Disinfectant Level) | mg/L | MRDL=4.0 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Chlorine (as Cl2) | MRDLG=4 1 | MRDL=4.0 1 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-chlorine-as-cl2/ | [
"contaminant",
"limit_value"
] | null |
Chlorine dioxide (as ClO2) | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-chlorine-dioxide-as-clo2 | MRDL (Maximum Residual Disinfectant Level) | mg/L | MRDL=0.8 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Chlorine dioxide (as ClO2) | MRDLG=0.8 1 | MRDL=0.8 1 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-chlorine-dioxide-as-clo2/ | [
"contaminant",
"limit_value"
] | null |
Chlorite | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-chlorite | Parametric value | mg/l | 0,25 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Chlorite | 0,25 | mg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-chlorite/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Chlorite | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-chlorite | MCL (Maximum Contaminant Level) | mg/L | 1.0 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Chlorite | 0.8 | 1.0 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-chlorite/ | [
"contaminant",
"limit_value"
] | null |
Chlorobenzene | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-chlorobenzene | MCL (Maximum Contaminant Level) | mg/L | 0.1 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Chlorobenzene | 0.1 | 0.1 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-chlorobenzene/ | [
"contaminant",
"limit_value"
] | null |
Chromium | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-chromium | Parametric value | μg/l | 25 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Chromium | 25 | μg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-chromium/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Chromium | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-chromium | Prescribed concentration or value (maximum) | µgCr/1 | 50 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Chromium | 50 | µgCr/1 | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-chromium/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Chromium (total) | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-chromium-total | MCL (Maximum Contaminant Level) | mg/L | 0.1 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Chromium (total) | 0.1 | 0.1 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-chromium-total/ | [
"contaminant",
"limit_value"
] | null |
cis-1,2-Dichloroethylene | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-cis-1-2-dichloroethylene | MCL (Maximum Contaminant Level) | mg/L | 0.07 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | cis-1,2-Dichloroethylene | 0.07 | 0.07 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-cis-1-2-dichloroethylene/ | [
"contaminant",
"limit_value"
] | null |
Clostridium perfringens including spores | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-clostridium-perfringens-including-spores | Indicator parameter | number/100 ml | 0 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Clostridium perfringens including spores | 0 | number/100 ml | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-clostridium-perfringens-including-spores/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Coliform bacteria | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-coliform-bacteria | Indicator parameter | number/100 ml | 0 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Coliform bacteria | 0 | number/100 ml | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-coliform-bacteria/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Coliform bacteria | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-coliform-bacteria | Prescribed concentration or value (maximum) | number/100ml | 0 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Coliform bacteria | 0 | number/100ml | Service reservoirs | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-coliform-bacteria/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Colour | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-colour | Prescribed concentration or value (maximum) | mg/1 Pt/Co | 20 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Colour | 20 | mg/1 Pt/Co | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-colour/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Conductivity | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-conductivity | Indicator parameter | μS cm-1 at 20 °C | 2 500 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Conductivity | 2 500 | μS cm-1 at 20 °C | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-conductivity/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Copper | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-copper | Parametric value | mg/l | 2,0 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Copper | 2,0 | mg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-copper/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Copper | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-copper | Prescribed concentration or value (maximum) | mgCu/1 | 2.0 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Copper | 2.0 | mgCu/1 | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-copper/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Copper | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-copper | Treatment Technique | mg/L | TT; Action Level=1.3 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Copper | 1.3 | TT 7 ; Action Level=1.3 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-copper/ | [
"contaminant"
] | null |
Cryptosporidium | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-cryptosporidium | Treatment Technique | null | TT | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Cryptosporidium | zero | TT 3 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-cryptosporidium/ | [
"contaminant",
"limit_value"
] | null |
Cyanide | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-cyanide | Parametric value | μg/l | 50 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Cyanide | 50 | μg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-cyanide/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Cyanide | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-cyanide | Prescribed concentration or value (maximum) | µgCN/1 | 50 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Cyanide | 50 | µgCN/1 | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-cyanide/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Cyanide (as free cyanide) | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-cyanide-as-free-cyanide | MCL (Maximum Contaminant Level) | mg/L | 0.2 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Cyanide (as free cyanide) | 0.2 | 0.2 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-cyanide-as-free-cyanide/ | [
"contaminant",
"limit_value"
] | null |
Dalapon | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-dalapon | MCL (Maximum Contaminant Level) | mg/L | 0.2 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Dalapon | 0.2 | 0.2 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-dalapon/ | [
"contaminant",
"limit_value"
] | null |
Di(2-ethylhexyl) adipate | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-di-2-ethylhexyl-adipate | MCL (Maximum Contaminant Level) | mg/L | 0.4 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Di(2-ethylhexyl) adipate | 0.4 | 0.4 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-di-2-ethylhexyl-adipate/ | [
"contaminant",
"limit_value"
] | null |
Di(2-ethylhexyl) phthalate | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-di-2-ethylhexyl-phthalate | MCL (Maximum Contaminant Level) | mg/L | 0.006 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Di(2-ethylhexyl) phthalate | zero | 0.006 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-di-2-ethylhexyl-phthalate/ | [
"contaminant",
"limit_value"
] | null |
Dichloromethane | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-dichloromethane | MCL (Maximum Contaminant Level) | mg/L | 0.005 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Dichloromethane | zero | 0.005 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-dichloromethane/ | [
"contaminant",
"limit_value"
] | null |
Dinoseb | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-dinoseb | MCL (Maximum Contaminant Level) | mg/L | 0.007 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Dinoseb | 0.007 | 0.007 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-dinoseb/ | [
"contaminant",
"limit_value"
] | null |
Dioxin (2,3,7,8-TCDD) | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-dioxin-2-3-7-8-tcdd | MCL (Maximum Contaminant Level) | mg/L | 0.00000003 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Dioxin (2,3,7,8-TCDD) | zero | 0.00000003 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-dioxin-2-3-7-8-tcdd/ | [
"contaminant",
"limit_value"
] | null |
Diquat | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-diquat | MCL (Maximum Contaminant Level) | mg/L | 0.02 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Diquat | 0.02 | 0.02 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-diquat/ | [
"contaminant",
"limit_value"
] | null |
Endothall | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-endothall | MCL (Maximum Contaminant Level) | mg/L | 0.1 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Endothall | 0.1 | 0.1 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-endothall/ | [
"contaminant",
"limit_value"
] | null |
Endrin | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-endrin | MCL (Maximum Contaminant Level) | mg/L | 0.002 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Endrin | 0.002 | 0.002 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-endrin/ | [
"contaminant",
"limit_value"
] | null |
Enterococci | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-enterococci | Prescribed concentration or value (maximum) | number/100ml | 0 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Enterococci | 0 | number/100ml | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-enterococci/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Epichlorohydrin | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-epichlorohydrin | Parametric value | μg/l | 0,10 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Epichlorohydrin | 0,10 | μg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-epichlorohydrin/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Epichlorohydrin | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-epichlorohydrin | Prescribed concentration or value (maximum) | µg/1 | 0.10 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Epichlorohydrin | 0.10 | µg/1 | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-epichlorohydrin/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Epichlorohydrin | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-epichlorohydrin | Treatment Technique | null | TT | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Epichlorohydrin | zero | TT 8 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-epichlorohydrin/ | [
"contaminant",
"limit_value"
] | null |
Escherichia coli (E. coli) | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-escherichia-coli-e-coli | Parametric value | number/100 ml | 0 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Escherichia coli (E. coli) | 0 | number/100 ml | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-escherichia-coli-e-coli/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Escherichia coli (E. coli) | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-escherichia-coli-e-coli | Prescribed concentration or value (maximum) | number/100ml | 0 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Escherichia coli (E. coli) | 0 | number/100ml | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-escherichia-coli-e-coli/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Ethylbenzene | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-ethylbenzene | MCL (Maximum Contaminant Level) | mg/L | 0.7 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Ethylbenzene | 0.7 | 0.7 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-ethylbenzene/ | [
"contaminant",
"limit_value"
] | null |
Ethylene dibromide | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-ethylene-dibromide | MCL (Maximum Contaminant Level) | mg/L | 0.00005 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Ethylene dibromide | zero | 0.00005 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-ethylene-dibromide/ | [
"contaminant",
"limit_value"
] | null |
Fluoride | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-fluoride | Parametric value | mg/l | 1,5 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Fluoride | 1,5 | mg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-fluoride/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Fluoride | [
"limit_name",
"regulator"
] | united-kingdom-si-2016-614-fluoride | Prescribed concentration or value (maximum) | mgF/1 | 1.5 | United Kingdom (SI 2016/614) | https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made | Fluoride | 1.5 | mgF/1 | | https://referencesource.org/drinking-water-contaminant-limits/united-kingdom-si-2016-614-fluoride/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Fluoride | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-fluoride | MCL (Maximum Contaminant Level) | mg/L | 4.0 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Fluoride | 4.0 | 4.0 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-fluoride/ | [
"contaminant",
"limit_value"
] | null |
Giardia lamblia | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-giardia-lamblia | Treatment Technique | null | TT | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Giardia lamblia | zero | TT 3 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-giardia-lamblia/ | [
"contaminant",
"limit_value"
] | null |
Glyphosate | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-glyphosate | MCL (Maximum Contaminant Level) | mg/L | 0.7 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Glyphosate | 0.7 | 0.7 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-glyphosate/ | [
"contaminant",
"limit_value"
] | null |
Haloacetic acids (HAA5) | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-haloacetic-acids-haa5 | MCL (Maximum Contaminant Level) | mg/L | 0.060 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Haloacetic acids (HAA5) | n/a 6 | 0.060 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-haloacetic-acids-haa5/ | [
"contaminant",
"limit_value"
] | null |
Haloacetic acids (HAAs) | [
"limit_name",
"regulator"
] | european-union-directive-2020-2184-haloacetic-acids-haas | Parametric value | μg/l | 60 | European Union (Directive 2020/2184) | https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1 | Haloacetic acids (HAAs) | 60 | μg/l | https://referencesource.org/drinking-water-contaminant-limits/european-union-directive-2020-2184-haloacetic-acids-haas/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Hazard Index PFAS (HFPO-DA, PFBS, PFHxS, and PFNA) | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-hazard-index-pfas-hfpo-da-pfbs-pfhxs-and-pfna | MCL (Maximum Contaminant Level) | unitless | 1(unitless) | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Hazard Index PFAS (HFPO-DA, PFBS, PFHxS, and PFNA) | 1(unitless) | 1(unitless) | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-hazard-index-pfas-hfpo-da-pfbs-pfhxs-and-pfna/ | [
"contaminant",
"limit_unit",
"limit_value"
] | null |
Heptachlor | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-heptachlor | MCL (Maximum Contaminant Level) | mg/L | 0.0004 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Heptachlor | zero | 0.0004 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-heptachlor/ | [
"contaminant",
"limit_value"
] | null |
Heptachlor epoxide | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-heptachlor-epoxide | MCL (Maximum Contaminant Level) | mg/L | 0.0002 | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Heptachlor epoxide | zero | 0.0002 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-heptachlor-epoxide/ | [
"contaminant",
"limit_value"
] | null |
Heterotrophic plate count (HPC) | [
"limit_name",
"regulator"
] | us-epa-national-primary-drinking-water-regulations-heterotrophic-plate-count-hpc | Treatment Technique | null | TT | US EPA (National Primary Drinking Water Regulations) | https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations | Heterotrophic plate count (HPC) | n/a | TT 3 | https://referencesource.org/drinking-water-contaminant-limits/us-epa-national-primary-drinking-water-regulations-heterotrophic-plate-count-hpc/ | [
"contaminant",
"limit_value"
] | null |
End of preview. Expand in Data Studio
Drinking water contaminant limits by regulator
Canonical, always-current version: https://referencesource.org/drinking-water-contaminant-limits/ Machine-readable: https://referencesource.org/drinking-water-contaminant-limits/data.json — this mirror is a point-in-time copy.
- Last verified: 2026-08-06
- Stale after: 2027-08-06 (past this date, prefer the canonical copy — it re-verifies on a cadence this snapshot does not)
- Records: 182
The legally enforceable maximum concentration of a contaminant in public drinking water, stated separately by each regulator that sets one. Each record is one contaminant under one regulator, carrying the limit, its unit, and the regulator's own name for the limit (MCL in the US, 'parametric value' in the EU and UK). Covers the US EPA National Primary Drinking Water Regulations, EU Directive 2020/2184, and the UK Water Supply (Water Quality) Regulations 2016. Answers 'what is the EPA limit for arsenic in drinking water', 'EU vs US drinking water lead limit', 'is the UK nitrate limit the same as the EU one', and 'what is the PFOA maximum contaminant level'. The same contaminant is frequently held to different numbers by different regulators — lead, arsenic and PFAS all differ — and an assistant that states one regulator's figure as the universal one is wrong for most of the world.
Provenance — what every record carries
Every record carries source (the URL the value was read from) and
source_quote (a verbatim quote from that page stating it). A value you
cannot check against its page is indistinguishable from an invented one;
these can all be checked. Each record is also individually addressable on
the canonical site at its url.
Licence position
Values are regulatory limits published by government bodies. US EPA pages are US Government works and not copyrightable. EUR-Lex content is reusable under Commission Decision 2011/833/EU. legislation.gov.uk carries the Open Government Licence. Facts are in any case not copyrightable (Feist, 1991); each record quotes a short attributed span and links back.
Facts are not copyrightable; what this dataset takes from each source is a fact plus a short attributed quote linking back to the page that states it.
Sources
- https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations
- https://publications.europa.eu/resource/cellar/7e65c36f-44c0-11eb-b59f-01aa75ed71a1.0006.03/DOC_1
- https://www.legislation.gov.uk/uksi/2016/614/schedule/1/made
- https://www.epa.gov/sdwa/and-polyfluoroalkyl-substances-pfas
Fields
See any record in data/records.jsonl — field names are self-describing,
and the canonical page for each record renders them with labels:
https://referencesource.org/drinking-water-contaminant-limits/
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