| # dcair v1 summary |
|
|
| Reported annual emissions from data centers, by state source. Tons per year as reported (emission-factor |
| estimates). QA-flagged values excluded. Each state is its own series; sources and coverage differ. |
|
|
| ## Latest year per state source |
|
|
| | state | source | year | facilities | NOx t | PM2.5 t | formaldehyde t | |
| |---|---|---|---|---|---|---| |
| | VA | VA DEQ air sites emissions | 2024 | 148 | 796.2 | 38.4 | 0.006 | |
| | VA | EPA NEI facility summary | 2023 | 28 | 394.3 | 11.3 | 0.137 | |
| | AZ | Maricopa County AQD annual emissions inventory | 2025 | 12 | 213.9 | 4.3 | 0.144 | |
| | CO | EPA NEI facility summary | 2023 | 15 | 136.0 | 10.6 | 0.028 | |
| | OR | EPA NEI facility summary | 2023 | 14 | 129.9 | 8.6 | 0.977 | |
| | TX | TCEQ point source emissions inventory | 2024 | 7 | 110.9 | 2.0 | n/a | |
| | IL | EPA NEI facility summary | 2023 | 13 | 83.9 | 3.3 | 0.021 | |
| | CA | CARB facility criteria emissions | 2024 | 26 | 40.9 | n/a | n/a | |
| | UT | EPA NEI facility summary | 2023 | 4 | 32.1 | 4.4 | 0.767 | |
| | TN | EPA NEI facility summary | 2023 | 2 | 22.0 | 0.3 | 0.000 | |
| | MA | EPA NEI facility summary | 2023 | 6 | 17.1 | 8.0 | 0.027 | |
| | NC | EPA NEI facility summary | 2019 | 1 | 15.6 | 0.1 | 0.000 | |
| | MO | EPA NEI facility summary | 2023 | 2 | 15.5 | 0.2 | 0.001 | |
| | WY | EPA NEI facility summary | 2023 | 1 | 15.3 | 0.6 | 0.026 | |
| | PA | PA DEP 25-year site-level emission inventory | 2025 | 5 | 11.7 | 0.2 | 0.001 | |
| | NV | EPA NEI facility summary | 2023 | 1 | 11.3 | 0.2 | 0.009 | |
| | IA | EPA NEI facility summary | 2023 | 2 | 6.1 | 0.3 | 0.000 | |
| | NE | EPA NEI facility summary | 2023 | 3 | 5.0 | 0.2 | 0.002 | |
| | OH | EPA NEI facility summary | 2023 | 1 | 3.9 | 0.1 | 1.057 | |
| | MI | EPA NEI facility summary | 2023 | 2 | 3.2 | 0.1 | 0.001 | |
| | MN | EPA NEI facility summary | 2023 | 3 | 2.8 | 0.1 | 0.002 | |
| | NJ | EPA NEI facility summary | 2016 | 1 | 1.4 | n/a | 0.000 | |
| | TX | EPA NEI facility summary | 2023 | 5 | n/a | n/a | 0.002 | |
| | OR | Oregon DEQ 2020 Air Toxics Emissions Inventory | 2020 | 5 | n/a | n/a | 0.114 | |
| | OR | Oregon DEQ 2016 Air Toxics Emissions Inventory | 2016 | 3 | n/a | n/a | 0.277 | |
|
|
| ## Multi-year state sources (NOx tons, facilities) |
|
|
| - **AZ Maricopa County AQD annual emissions inventory**: 2001 4 t (1), 2002 13 t (1), 2003 3 t (1), 2004 6 t (1), 2005 2 t (1), 2011 7 t (1), 2012 3 t (1), 2013 7 t (1), 2014 13 t (1), 2015 8 t (2), 2016 15 t (7), 2017 26 t (5), 2018 32 t (6), 2019 74 t (6), 2020 43 t (6), 2021 95 t (10), 2022 97 t (13), 2023 185 t (15), 2024 151 t (12), 2025 214 t (12) |
| - **TX TCEQ point source emissions inventory**: 2020 4 t (2), 2021 45 t (3), 2022 15 t (5), 2023 28 t (5), 2024 111 t (7) |
| - **CA CARB facility criteria emissions**: 2009 0 t (1), 2010 1 t (4), 2011 1 t (4), 2012 1 t (5), 2013 1 t (5), 2014 3 t (6), 2015 2 t (5), 2016 4 t (6), 2017 5 t (8), 2018 3 t (8), 2019 11 t (10), 2020 12 t (12), 2021 8 t (12), 2022 12 t (16), 2023 16 t (18), 2024 41 t (26) |
| - **PA PA DEP 25-year site-level emission inventory**: 2018 7 t (1), 2020 9 t (2), 2021 6 t (2), 2022 6 t (2), 2023 10 t (4), 2024 7 t (4), 2025 12 t (5) |
|
|
| ## Largest single facility-years (NOx) |
|
|
| | state | year | facility | operator | NOx t | source | |
| |---|---|---|---|---|---| |
| | VA | 2023 | Amazon Data Services, Inc IAD-132/133 | Amazon | 77.6 | EPA NEI facility summary | |
| | VA | 2024 | Iron Mountain Information Management LLC | Iron Mountain | 74.0 | VA DEQ air sites emissions | |
| | TX | 2024 | MICROSOFT | Microsoft | 66.8 | TCEQ point source emissions inventory | |
| | AZ | 2023 | CyrusOne | CyrusOne | 63.9 | Maricopa County AQD annual emissions inventory | |
| | AZ | 2025 | Microsoft Corp - Broadway Rd | Microsoft | 59.4 | Maricopa County AQD annual emissions inventory | |
| | VA | 2023 | DuPont Fabros Tech - Ashburn Corp Ctr | Digital Realty | 47.7 | EPA NEI facility summary | |
| | VA | 2022 | CyrusOne Kincora | CyrusOne | 46.0 | EPA NEI facility summary | |
| | AZ | 2021 | CyrusOne | CyrusOne | 43.5 | Maricopa County AQD annual emissions inventory | |
| | AZ | 2019 | Cyrusone | CyrusOne | 40.3 | Maricopa County AQD annual emissions inventory | |
| | AZ | 2025 | CyrusOne - Chandler | CyrusOne | 39.9 | Maricopa County AQD annual emissions inventory | |
| | CO | 2020 | AMAZON DATA SERVICES - DEN-22 | Amazon | 39.2 | EPA NEI facility summary | |
| | CO | 2021 | AMAZON DATA SERVICES - DEN-22 | Amazon | 39.2 | EPA NEI facility summary | |
| | CO | 2022 | AMAZON DATA SERVICES - DEN-22 | Amazon | 39.2 | EPA NEI facility summary | |
| | TX | 2021 | EQUINIX N STEMMONS FREEWAY DALLAS | Equinix | 38.7 | TCEQ point source emissions inventory | |
| | NJ | 2012 | NJ-1 Data Center | | 38.4 | EPA NEI facility summary | |
| | VA | 2024 | Microsoft Corporation - East Coast Data Center | Microsoft | 36.6 | VA DEQ air sites emissions | |
| | CO | 2014 | WAL-MART -COLORADO DATA CENTER #7497 | | 36.3 | EPA NEI facility summary | |
| | CO | 2015 | WAL-MART -COLORADO DATA CENTER #7497 | | 36.3 | EPA NEI facility summary | |
| | CO | 2016 | WAL-MART -COLORADO DATA CENTER #7497 | | 36.3 | EPA NEI facility summary | |
| | CO | 2017 | WAL-MART -COLORADO DATA CENTER #7497 | | 35.9 | EPA NEI facility summary | |
|
|
| ## Operators (NOx, latest year per state, matched by name only) |
|
|
| - Equinix: VA 2024 20.2 t, IL 2023 13.5 t, TX 2024 6.0 t, MA 2023 3.3 t, CO 2023 1.9 t, CA 2024 0.5 t |
| - Microsoft: AZ 2025 84.2 t, VA 2024 84.0 t, TX 2024 66.8 t, WY 2023 15.3 t, IA 2023 6.1 t, IL 2023 5.1 t |
| - Digital Realty: VA 2024 62.6 t, AZ 2025 8.9 t, CA 2024 0.3 t, IL 2023 0.3 t |
| - Amazon: VA 2024 136.5 t, OR 2023 67.3 t, CO 2023 24.3 t, PA 2025 5.1 t, CA 2024 1.9 t |
| - CyrusOne: VA 2024 52.0 t, AZ 2025 39.9 t, TX 2024 29.9 t, IL 2023 15.1 t, KY 2023 0.6 t |
| - Iron Mountain: VA 2024 74.0 t, AZ 2025 28.9 t, CO 2023 15.3 t |
| - QTS: VA 2024 89.9 t, AZ 2025 25.3 t, CO 2023 22.1 t, OR 2023 21.2 t |
| - CoreSite: VA 2024 12.0 t, MA 2023 6.2 t, CO 2023 4.7 t, IL 2022 1.6 t, CA 2024 0.8 t, FL 2023 0.1 t |
| - Cyxtera: VA 2023 22.0 t, IL 2021 12.7 t, MA 2023 4.5 t, CA 2022 0.6 t |
| - Switch: NV 2023 11.3 t, MI 2023 1.9 t |
| - Aligned: IL 2023 22.7 t, VA 2024 18.1 t, UT 2023 4.1 t, AZ 2025 0.8 t |
| - Vantage: AZ 2025 19.3 t, VA 2024 5.5 t, CA 2024 4.0 t |
| - NTT: CA 2024 27.6 t, VA 2024 11.5 t, IL 2023 5.9 t, AZ 2025 5.6 t, OR 2023 3.7 t |
| - DataBank: CO 2023 24.7 t, MN 2023 0.5 t |
| - Stack: OR 2023 1.0 t, VA 2024 0.0 t |
| - Flexential: OR 2023 36.8 t, PA 2016 0.1 t |
| - TierPoint: PA 2025 5.6 t, NE 2022 0.8 t |
| - Meta: TX 2024 3.4 t |
| - Cologix: OH 2023 3.9 t, VA 2024 0.0 t |
| - Google: TX 2024 2.7 t |
| - EdgeConneX: CA 2024 1.7 t, TN 2023 0.5 t |
| - H5: VA 2024 1.4 t, AZ 2025 1.0 t |
| - Yahoo: VA 2024 0.0 t |
|
|
| ## Reporting patterns (pattern_flag) |
| |
| - 45 of 112 facility NOx series with 3+ years repeat an identical nonzero value in 3+ years (EPA NEI facility summary 39, CARB facility criteria emissions 5, TCEQ point source emissions inventory 1). |
| - CO exactly equals NOx in 9 facility-years: APS Aligned Energy Data Center, Aps - Aligned Energy Data Center. |
| |
