New Haven, CT
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.
Environmental data for New Haven in Connecticut
New Haven, CT is tracked across three EPA datasets covering 50 Toxics Release Inventory (TRI) facilities, 20 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 70/100 (High Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 2.2M lbs of reported toxic releases under EPCRA Section 313, while 9 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 41 and a peak AQI of 156 in 2024, with 71% of observed days rated "Good" (0–50).
All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.
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 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 (20)
| System | Population | Violations |
|---|---|---|
| REGIONAL WATER AUTHORITY | 418,900 | 0 |
| WATERBURY WATER DEPARTMENT | 107,271 | 0 |
| MERIDEN WATER DIVISION | 58,441 | 4 |
| 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 |
| 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)
Cities in New Haven (23)
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.