Worcester, MA
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 Worcester in Massachusetts · Population: 861,664
TRI sites such as Supercon Inc; Select Engineering Inc; Incom Inc.; SDWIS systems such as WORCESTER DPWP, WATER SUPPLY DIVISION; FITCHBURG DPW DIVISION OF WATER SUPPLY; LEOMINSTER WATER DIVISION; NPL sites such as Hocomonco Pond anchor Worcester, MA's EPA extract. Derived burden score 74/100 (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 Worcester include WORCESTER DPWP, WATER SUPPLY DIVISION; FITCHBURG DPW DIVISION OF WATER SUPPLY; LEOMINSTER WATER DIVISION, while Supercon Inc leads reported TRI pounds among local Form R filers. AQS median AQI 37 / peak 90 in 2024.
Burden score 74/100 (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 Worcester -- 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 Worcester, MA: EPA TRI 2023 reporting year
Same facilities, both years
-6.2%
65 facilities that filed in 2022 and 2023
Whole inventory
-9.3%
283.1 thousand lb → 256.8 thousand lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 5 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Worcester, MA's total reported releases fell from 273.8 thousand lb in 2022 to 256.7 thousand lb in 2023, based on EPA TRI filings.
- Worcester, MA's land releases rose from 11.5 thousand lb in 2022 to 31.3 thousand lb in 2023, based on EPA TRI filings.
- Worcester, MA's off-site transfers fell from 183.4 thousand lb in 2022 to 144.7 thousand lb in 2023, based on EPA TRI filings.
- Worcester, MA's water releases rose from 1.2 thousand lb in 2022 to 1.3 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 | 321 (88%) | 45 | 0 | 90 |
| 2023 | 268 (73%) | 93 | 4 | 148 |
| 2022 | 228 (62%) | 137 | 0 | 100 |
| 2021 | 218 (60%) | 144 | 3 | 125 |
| 2020 | 257 (70%) | 109 | 0 | 90 |
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 Massachusetts, see the EPA's AirNow.gov.
Water Systems (129)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| WORCESTER DPWP, WATER SUPPLY DIVISION | 206,518 | 1 |
| FITCHBURG DPW DIVISION OF WATER SUPPLY | 41,946 | 1 |
| LEOMINSTER WATER DIVISION | 41,683 | 5 |
| SHREWSBURY WATER DEPARTMENT | 38,325 | 0 |
| MILFORD WATER DEPARTMENT | 30,379 | 1 |
| WESTBOROUGH WATER DEPARTMENT | 21,567 | 2 |
| GARDNER WATER DEPARTMENT | 21,381 | 2 |
| SOUTHBRIDGE WATER DEPARTMENT | 19,562 | 0 |
| HOLDEN WATER DIVISION, DPW | 18,016 | 1 |
| WEBSTER WATER DEPARTMENT | 17,776 | 1 |
| CLINTON WATER DEPT | 15,428 | 2 |
| NORTHBOROUGH WATER DEPARTMENT (MWRA) | 13,551 | 0 |
| AUBURN WATER DISTRICT | 12,255 | 2 |
| UXBRIDGE DPW, WATER DIVISION | 11,612 | 3 |
| ASH/WIN JOINT WATER AUTHORITY | 11,394 | 0 |
| AQUARION WATER COMPANY, MILLBURY | 11,368 | 0 |
| GRAFTON WATER DISTRICT | 10,925 | 0 |
| SOUTHBOROUGH DPW WATER DIVISION (MWRA) | 10,638 | 0 |
| ATHOL DPW WATER DIVISION | 10,587 | 0 |
| AQUARION WATER COMPANY, PINEHILLS | 9,478 | 0 |
| BLACKSTONE WATER DEPARTMENT | 9,463 | 1 |
| NORTHBRIDGE WATER DIVISION | 8,127 | 0 |
| WHITINSVILLE WATER COMPANY | 7,899 | 3 |
| AQUARION WATER COMPANY OXFORD | 7,384 | 0 |
| LUNENBURG WATER DISTRICT | 7,219 | 0 |
| SPENCER WATER DEPARTMENT | 7,037 | 1 |
| WEST BOYLSTON WATER DISTRICT | 6,919 | 0 |
| STERLING WATER DEPARTMENT | 6,715 | 2 |
| DEVENS MASSDEVELOPMENT | 6,500 | 1 |
| TEMPLETON MUNIC. LIGHT AND WATER PLANT | 6,159 | 0 |
| RUTLAND WATER DEPARTMENT | 6,025 | 14 |
| HOPEDALE WATER DEPARTMENT | 6,017 | 2 |
| LANCASTER WATER DEPARTMENT | 6,000 | 1 |
| WINCHENDON WATER DEPARTMENT | 5,706 | 2 |
| DUDLEY WATER DEPARTMENT | 5,515 | 1 |
| STURBRIDGE WATER DEPARTMENT | 4,746 | 3 |
| UPTON DPW WATER/WASTEWATER DIVISION | 4,420 | 0 |
| DOUGLAS WATER DEPARTMENT | 4,400 | 0 |
| PAXTON WATER DEPARTMENT | 4,300 | 0 |
| WESTMINSTER DEPARTMENT OF PUBLIC WORKS | 3,889 | 7 |
| NORTH BROOKFIELD WATER DEPARTMENT | 3,863 | 2 |
| CHERRY VALLEY/ ROCHDALE WATER DISTRICT | 3,696 | 48 |
| ASHBURNHAM WATER DEPARTMENT | 3,680 | 1 |
| MCI SHIRLEY | 3,500 | 2 |
| BOYLSTON WATER DISTRICT | 3,343 | 1 |
| SOUTH GRAFTON WATER DISTRICT | 3,262 | 0 |
| WEST BROOKFIELD WATER DEPARTMENT | 3,217 | 0 |
| LEICESTER WATER SUPPLY DISTRICT | 3,200 | 0 |
| MCI BRIDGEWATER | 2,802 | 4 |
| WILKINSONVILLE WATER DISTRICT | 2,773 | 0 |
| BARRE WATER DEPARTMENT | 2,610 | 1 |
| WARREN WATER DISTRICT | 2,289 | 1 |
| ELM HILL WATER DISTRICT | 2,278 | 0 |
| AQUARION WATER COMPANY PONDS OF PLYMOUTH | 2,267 | 0 |
| MCI NORFOLK/CEDAR JUNCTION/WALPOLE | 2,200 | 1 |
| AQUARION WATER COMPANY (DOVER) | 1,929 | 3 |
| EAST BROOKFIELD WATER DEPARTMENT | 1,526 | 0 |
| HILLCREST WATER DISTRICT | 1,500 | 0 |
| HARVARD WATER DEPARTMENT | 1,422 | 1 |
| GILBERTVILLE WATER DISTRICT | 1,089 | 1 |
| BROOKFIELD WATER DEPARTMENT | 1,008 | 0 |
| WEST WARREN WATER DISTRICT | 927 | 1 |
| BOLTON OFFICE PARK ALTA NASHOBA VALLEY | 788 | 0 |
| MENDON WATER DEPARTMENT | 470 | 0 |
| HUTCHINSON WATER LLC | 400 | 0 |
| MILLBURY IND. PARK/ PARK HILL VILLAGE | 400 | 1 |
| STURBRIDGE RETIREMENT COOP. CORP. | 350 | 0 |
| WHEELWRIGHT WATER DISTRICT | 300 | 1 |
| EAGLE HILL SCHOOL | 300 | 1 |
| SOUTH ROYALSTON IMPROVEMENT CORP | 275 | 0 |
| SAWYER HILL ECOVILLAGE | 272 | 0 |
| WAGON WHEEL COMMUNITY, INC. | 228 | 0 |
| MASAC PLYMOUTH | 210 | 0 |
| HERITAGE ASSOCIATION | 158 | 0 |
| CEDAR CREEK MHP | 154 | 0 |
| MEADOWBROOK VILLAGE CONDOMINIUMS | 150 | 0 |
| HARVARD GREEN CONDOMINIUMS | 150 | 0 |
| AYER ROAD PROPERTIES LLC | 150 | 0 |
| NASONVILLE WATER DISTRICT | 150 | 0 |
| REGENCY AT BOLTON CONDOMINIUMS | 148 | 0 |
| STAFFORDSHIRE COUNTRY ESTATES | 140 | 0 |
| CENTURY MILL ESTATES | 135 | 0 |
| HIGHLAND RIDGE CONDOMINIUMS | 132 | 0 |
| HOLMES PARK WATER DISTRICT | 131 | 0 |
| GREEN VALLEY MOBILE HOME PARK | 127 | 2 |
| AQUARION WATER CO. (SPRINGDALE FARMS) | 126 | 1 |
| WOODLAND RIDGE | 125 | 0 |
| NANATOMQUA MOBILE HOME PARK | 123 | 0 |
| REVEL PELHAM | 123 | 10 |
| BROOKFIELD MEADOWS MHP | 120 | 0 |
| LANCASTER WOODS CONDOMINIUMS | 120 | 1 |
| LEINO PARK WATER DISTRICT | 120 | 2 |
| BARRE MHP/WATERWHEEL VILLAGE | 114 | 0 |
| ROCKWOOD MEADOWS | 110 | 0 |
| TRAIL RIDGE CONDOMINIUMS | 104 | 0 |
| ENCLAVE AT BOXBOROUGH | 100 | 0 |
| DEERFIELD ESTATES | 100 | 0 |
| ESTATES AT HIGHLAND RIDGE | 100 | 0 |
| PINE HILL CONDOMINIUM | 95 | 1 |
| HARDWICK CENTER WATER DISTRICT | 80 | 2 |
| THE PRESERVE AT HOPKINTON CONDO | 80 | 2 |
| CADY BROOK CROSSING CONDOMINIUMS | 75 | 2 |
| COOL SANDY BEACH COMMUNITY WATER SYSTEM | 70 | 2 |
| LAUREL HILL CONDOMINIUMS | 64 | 0 |
| FAIRHAVEN MOBILE HOME PARK | 63 | 2 |
| BOLTON COUNTRY MANOR | 60 | 1 |
| TORIA HEIGHTS CONDOMINIUM | 60 | 3 |
| APPLETON GARDENS | 57 | 0 |
| ROYAL PINE VILLA | 55 | 3 |
| COBBLERS CREEK CONDOMINIUMS | 54 | 0 |
| STURBRIDGE CROSSING CONDOMINIUM | 52 | 0 |
| APPLEWOOD HOME FOR ELDERS | 50 | 0 |
| VILLAGE AT HIGHLAND PARK | 50 | 0 |
| PINEWOOD ON THE GREEN CONDOS | 50 | 0 |
| MADDEN ESTATES | 50 | 20 |
| NORTHBROOK VILLAGE I / BERLIN RET. | 48 | 2 |
| SAINT JOSEPHS ABBEY | 45 | 0 |
| SUNSET RIDGE CONDOMINIUMS | 42 | 0 |
| WHITNEY ESTATES CONDOMINIUMS | 40 | 0 |
| HUBBARDSTON HOUSE APARTMENTS | 40 | 0 |
| SILVERLEAF HOLLOW CONDOMINIUMS | 40 | 0 |
| BUFFUMVILLE HEIGHTS ESTATES CONDOMINIUM | 40 | 0 |
| CENTRE VILLAGE APARTMENTS | 36 | 0 |
| ARNIO DRIVE LLC | 33 | 0 |
| MAPLEBROOK APARTMENTS | 33 | 0 |
| MENDON HOUSING AUTHORITY | 31 | 0 |
| 122 MAIN STREET | 30 | 0 |
| COUNTRYSIDE CONDOMINIUM | 30 | 1 |
| CHARLTON MANOR REST HOME | 26 | 0 |
TRI Facilities (50)
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Hocomonco Pond | NPL Site | 44.80 |
Cities in Worcester (70)
Frequently Asked Questions
What is the environmental risk level in Worcester, Massachusetts? ▼
Are there Superfund sites in Worcester? ▼
How many toxic release facilities are in Worcester? ▼
What is the air quality in Worcester? ▼
Is the drinking water safe in Worcester? ▼
What environmental agencies cover Worcester? ▼
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.