New Haven, CT
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.
Environmental data for New Haven in Connecticut
TRI sites such as Allnex USA Inc. Wallingford Ct Site; American Greenfuels LLC; Cpv Towantic Energy Center; SDWIS systems such as REGIONAL WATER AUTHORITY; WATERBURY WATER DEPARTMENT; MERIDEN WATER DIVISION; NPL sites such as Beacon Heights Landfill; Cheshire Ground Water Contamination; Laurel Park, Inc. anchor New Haven, CT's EPA extract. Derived burden score 95/100 (High Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in New Haven include MERIDEN WATER DIVISION; YESHIVA OF WATERBURY-DURHAM CAMPUS; ARROWHEAD BY THE LAKE ASSOCIATION, INC., while Allnex USA Inc. Wallingford Ct Site leads reported TRI pounds among local Form R filers. AQS median AQI 41 / peak 156 in 2024.
Burden score 95/100 (High Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for New Haven -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for New Haven, CT: EPA TRI 2023 reporting year
Same facilities, both years
+2.2%
79 facilities that filed in 2022 and 2023
Whole inventory
-0.0%
429.5 thousand lb → 429.5 thousand lb, every facility that filed
These two measures point in opposite directions. Releases from the facilities present in both years rose, while the inventory-wide total fell. The difference is which facilities filed, not a different estimate of the same plants.
Between the two reporting years, 2 facilities filed for the first time and 4 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- New Haven, CT's total reported releases rose from 420.4 thousand lb in 2022 to 429.5 thousand lb in 2023, based on EPA TRI filings.
- New Haven, CT's land releases rose from 0 lb in 2022 to 180 lb in 2023, based on EPA TRI filings.
- New Haven, CT's water releases fell from 7.4 thousand lb in 2022 to 1.3 thousand lb in 2023, based on EPA TRI filings.
- New Haven, CT's off-site transfers rose from 139.7 thousand lb in 2022 to 170.8 thousand lb in 2023, based on EPA TRI filings.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 260 (71%) | 94 | 11 | 156 |
| 2023 | 205 (56%) | 148 | 9 | 208 |
| 2022 | 230 (63%) | 128 | 7 | 133 |
| 2021 | 220 (60%) | 131 | 12 | 159 |
| 2020 | 210 (57%) | 143 | 11 | 174 |
Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in Connecticut, see the EPA's AirNow.gov.
Water Systems (21)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| REGIONAL WATER AUTHORITY | 418,900 | 0 |
| WATERBURY WATER DEPARTMENT | 107,271 | 0 |
| MERIDEN WATER DIVISION | 58,441 | 2 |
| WALLINGFORD WATER DEPARTMENT | 37,267 | 0 |
| WOLCOTT WATER DEPARTMENT | 2,550 | 0 |
| SOUTHBURY TRAINING SCHOOL | 816 | 0 |
| QUONNIPAUG HILLS - MAIN SYSTEM | 564 | 0 |
| YESHIVA OF WATERBURY-DURHAM CAMPUS | 490 | 6 |
| ARROWHEAD BY THE LAKE ASSOCIATION, INC. | 288 | 6 |
| TOWN IN COUNTRY CONDOMINIUMS - UPPER SYS | 120 | 0 |
| TOWN IN COUNTRY CONDOMINIUMS - LOWER SYS | 120 | 0 |
| LAKE HILLS VILLAGE CONDOMINIUMS | 102 | 1 |
| LAUREL HILL WATER ASSOCIATION | 86 | 0 |
| KNOB HILL CONDOMINIUMS | 84 | 0 |
| NORTHFORD GLEN CONDOMINIUM ASSOCIATION | 84 | 3 |
| MIDDLEBURY COMMONS | 76 | 1 |
| WOODBURY PLACE CONDOMINIUM ASSN | 72 | 0 |
| LONGVIEW ESTATES, LLC | 69 | 1 |
| MANSFIELD VILLAGE, LLC | 40 | 2 |
| OAKDALE MANOR WATER ASSOCIATION | 40 | 3 |
| QUONNIPAUG HILLS - SECTION I | 27 | 0 |
TRI Facilities (50)
Superfund Sites (5)
| Site Name | Status | HRS Score |
|---|---|---|
| Beacon Heights Landfill | NPL Site | 46.77 |
| Cheshire Ground Water Contamination | Deleted NPL Site | 35.57 |
| Laurel Park, Inc. | NPL Site | 0.00 |
| Nutmeg Valley Road | Deleted NPL Site | 42.69 |
| Scovill Industrial Landfill | NPL Site | 50.00 |
Cities in New Haven (26)
Frequently Asked Questions
What is the environmental risk level in New Haven, Connecticut? ▼
Are there Superfund sites in New Haven? ▼
How many toxic release facilities are in New Haven? ▼
What is the air quality in New Haven? ▼
Is the drinking water safe in New Haven? ▼
What environmental agencies cover New Haven? ▼
What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.