Hartford, 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. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for Hartford in Connecticut
TRI sites such as Clean Harbors of Connecticut Inc; Pratt & Whitney; Har-Conn Chrome Co; SDWIS systems such as NEW BRITAIN WATER DEPARTMENT; BRISTOL WATER DEPARTMENT; MANCHESTER WATER DEPARTMENT; NPL sites such as Old Southington Landfill; Solvents Recovery Service of New England anchor Hartford, CT's EPA extract. Derived burden score 81/100 (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 Hartford include JEWETT CITY WATER COMPANY; BERLIN WATER CONTROL COMMISSION; CONNECTICUT CORRECTIONAL INSTITUTE, while Clean Harbors of Connecticut Inc leads reported TRI pounds among local Form R filers. AQS median AQI 39 / peak 185 in 2024.
Burden score 81/100 (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 Hartford -- 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 Hartford, CT: EPA TRI 2023 reporting year
Same facilities, both years
-15.4%
71 facilities that filed in 2022 and 2023
Whole inventory
-15.4%
636.5 thousand lb → 538.2 thousand lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 6 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Hartford, CT's total reported releases fell from 636.5 thousand lb in 2022 to 538.2 thousand lb in 2023, based on EPA TRI filings.
- Hartford, CT's land releases fell from 86 lb in 2022 to 0 lb in 2023, based on EPA TRI filings.
- Hartford, CT's air releases fell from 115.7 thousand lb in 2022 to 91.5 thousand lb in 2023, based on EPA TRI filings.
- Hartford, CT's off-site transfers fell from 520.4 thousand lb in 2022 to 446.3 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 | 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 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 (58)
| System | System pop (SDWIS) | 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 | 5 |
| PINECREST CONDOMINIUMS | 110 | 19 |
| JUNIPER CLUB INC. | 104 | 16 |
| 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 |
| CIELO AZUL RANCH | 84 | 1 |
| BIRCH LANDING CONDOMINIUM | 82 | 5 |
| SCHOOL HILL ASSOCIATION, INC. | 77 | 1 |
| 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 |
| SAFE HARBOR, INC. | 50 | 3 |
| 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)
Superfund Sites (2)
| Site Name | Status | HRS Score |
|---|---|---|
| Old Southington Landfill | Deleted NPL Site | 54.35 |
| Solvents Recovery Service of New England | NPL Site | 44.93 |
Cities in Hartford (34)
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.