Hartford, CT
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against every other tracked county rather than against fixed national thresholds.
Environmental data for Hartford in Connecticut
Hartford, CT is tracked across three EPA datasets covering 50 Toxics Release Inventory (TRI) facilities, 59 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 71/100 (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 3.7M lbs of reported toxic releases under EPCRA Section 313, while 36 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 39 and a peak AQI of 185 in 2024, with 77% 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 | 280 (77%) | 79 | 6 | 185 |
| 2023 | 226 (62%) | 132 | 4 | 166 |
| 2022 | 260 (71%) | 101 | 4 | 136 |
| 2021 | 247 (68%) | 115 | 3 | 136 |
| 2020 | 255 (70%) | 111 | 0 | 98 |
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 (59)
| System | Population | Violations |
|---|---|---|
| NEW BRITAIN WATER DEPARTMENT | 73,534 | 0 |
| BRISTOL WATER DEPARTMENT | 52,079 | 0 |
| MANCHESTER WATER DEPARTMENT | 51,198 | 0 |
| SOUTHINGTON WATER DEPARTMENT | 43,069 | 0 |
| HAZARDVILLE WATER COMPANY | 18,544 | 0 |
| KENSINGTON FIRE DISTRICT | 7,553 | 0 |
| JEWETT CITY WATER COMPANY | 6,840 | 3 |
| BERLIN WATER CONTROL COMMISSION | 5,128 | 1 |
| WORTHINGTON FIRE DISTRICT | 2,875 | 0 |
| CONNECTICUT CORRECTIONAL INSTITUTE | 2,385 | 1 |
| SALMON BROOK DISTRICT WATER DEPT | 2,151 | 0 |
| TARIFFVILLE FIRE DISTRICT WATER DEPT | 1,477 | 2 |
| HARMONY ACRES MOBILE HOME PARK | 465 | 0 |
| TURKEY HILL OF EAST GRANBY, LLC | 360 | 1 |
| HAZARDVILLE - RYE HILL SYSTEM | 352 | 0 |
| ETHEL WALKER SCHOOL | 325 | 1 |
| JEWETT CITY WATER CO., S & W SYSTEM | 320 | 0 |
| MOOSUP GARDEN APARTMENTS | 270 | 0 |
| JOHNSON MEMORIAL HOSPITAL, INC | 250 | 1 |
| APPLE REHAB | 238 | 1 |
| OLD NEWGATE RIDGE WATER COMPANY INC | 208 | 1 |
| WHITE OAK CONDOMINIUMS | 192 | 1 |
| ORCHARD ACRES ASSOCIATION | 176 | 10 |
| SHAKER HEIGHTS WATER COMPANY | 172 | 0 |
| MARLBOROUGH HEALTH CARE CENTER, INC | 165 | 1 |
| JEWETT CITY WATER CO-HILL-N-DALE | 146 | 0 |
| PERRY HILL ESTATES APARTMENTS INC. | 144 | 3 |
| IDLEVIEW MOBILE HOME PARK | 138 | 0 |
| BIRCH HILLS CONDOMINIUMS | 132 | 1 |
| DEER PARK APARTMENTS | 125 | 4 |
| PINECREST CONDOMINIUMS | 110 | 16 |
| JUNIPER CLUB INC. | 104 | 13 |
| WILLINGTON RIDGE CONDOS - SYSTEM #1 | 102 | 2 |
| WILLINGTON RIDGE CONDOS - SYSTEM #2 | 102 | 1 |
| GRANT HILL ASSOCIATES, INC. | 97 | 1 |
| WOODLAWN APARTMENTS | 96 | 5 |
| HILLSIDE CONDOMINIUMS | 96 | 1 |
| WOODS EDGE APARTMENTS | 96 | 1 |
| RIDGEVIEW HEIGHTS | 96 | 5 |
| EAST WINDSOR HOUSING AUTHORITY | 94 | 4 |
| CRESTVIEW CONDOMINIUM ASSOCIATION | 84 | 1 |
| KNOB HILL CONDOMINIUMS | 84 | 0 |
| CIELO AZUL RANCH | 84 | 1 |
| BIRCH LANDING CONDOMINIUM | 82 | 5 |
| SCHOOL HILL ASSOCIATION, INC. | 77 | 1 |
| OAK GROVE SENIOR HOUSING CORP | 72 | 0 |
| CHELSEA ELDERLY HOUSING | 68 | 5 |
| GREEN VILLAGE | 65 | 0 |
| METACOMET HOMES-WELL 1 AND WELL 2 | 63 | 0 |
| WOODCREST ASSOCIATION, INC | 60 | 0 |
| SHARON HEIGHTS WATER ASSOCIATION | 51 | 0 |
| FARMINGTON LINE WEST CONDOMINIUMS | 51 | 1 |
| MAR-LEA PARK APARTMENTS | 50 | 4 |
| MOOSUP POND TERRACE, LLC | 46 | 1 |
| CHELSEA FAMILY HOUSING | 44 | 7 |
| CHATHAM APARTMENTS | 40 | 0 |
| ORCHARD HILL ASSOCIATION | 30 | 5 |
| WINDSORVILLE WATER ASSOCIATION | 29 | 0 |
| 298-302 ALBANY TURNPIKE | 28 | 5 |
TRI Facilities (50)
Cities in Hartford (25)
Frequently Asked Questions
What is the environmental risk level in Hartford, Connecticut? ▼
Are there Superfund sites in Hartford? ▼
How many toxic release facilities are in Hartford? ▼
What is the air quality in Hartford? ▼
Is the drinking water safe in Hartford? ▼
What environmental agencies cover Hartford? ▼
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.