Hampden, 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. 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 Hampden in Massachusetts · Population: 462,853
TRI sites such as Solutia Inc; Callaway Golf Ball Operations Inc; Westfield Electroplating Co; SDWIS systems such as CHICOPEE WATER DEPT (MWRA); WESTFIELD DPWWATER DIVISION; HOLYOKE WATER WORKS; NPL sites such as PSC Resources anchor Hampden, MA's EPA extract. Derived burden score 76/100 (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 Hampden include WESTFIELD DPWWATER DIVISION; AGAWAM WATER DEPARTMENT; EAST LONGMEADOW DPW WATER DEPT, while Solutia Inc leads reported TRI pounds among local Form R filers. AQS median AQI 37 / peak 119 in 2024.
Burden score 76/100 (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 Hampden -- 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 Hampden, MA: EPA TRI 2023 reporting year
Same facilities, both years
-1.1%
36 facilities that filed in 2022 and 2023
Whole inventory
-2.1%
1.1 million lb → 1.1 million lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 3 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Hampden, MA's total reported releases fell from 1.1 million lb in 2022 to 1.1 million lb in 2023, based on EPA TRI filings.
- Hampden, MA's air releases fell from 132.1 thousand lb in 2022 to 96.0 thousand lb in 2023, based on EPA TRI filings.
- Hampden, MA's chemicals reported fell from 39 in 2022 to 38 in 2023, based on EPA TRI filings.
- Hampden, MA's off-site transfers rose from 983.8 thousand lb in 2022 to 1.0 million 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 | 290 (79%) | 74 | 2 | 119 |
| 2023 | 220 (60%) | 139 | 4 | 153 |
| 2022 | 262 (72%) | 102 | 1 | 115 |
| 2021 | 215 (59%) | 148 | 2 | 116 |
| 2020 | 249 (68%) | 117 | 0 | 99 |
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 (31)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CHICOPEE WATER DEPT (MWRA) | 55,560 | 0 |
| WESTFIELD DPWWATER DIVISION | 41,094 | 2 |
| HOLYOKE WATER WORKS | 37,838 | 0 |
| WEST SPRINGFIELD DPW WATER DIVISION | 28,835 | 0 |
| AGAWAM WATER DEPARTMENT | 28,692 | 10 |
| EAST LONGMEADOW DPW WATER DEPT | 16,358 | 16 |
| LONGMEADOW WATER DEPT | 15,853 | 36 |
| WILBRAHAM WATER DEPT (MWRA) | 8,533 | 1 |
| SOUTHWICK WATER DEPT | 7,669 | 0 |
| PALMER WATER DISTRICT NO.1 | 4,789 | 4 |
| MONSON WATER AND SEWER DEPT | 4,222 | 0 |
| THREE RIVERS FIRE DISTRICT | 3,258 | 0 |
| THORNDIKE FIRE AND WATER DISTRICT | 1,435 | 0 |
| BONDSVILLE FIRE AND WATER DISTRICT | 1,429 | 0 |
| RUSSELL WATER DEPT | 1,228 | 2 |
| CHESTER WATER DEPT | 750 | 12 |
| LIBERTY MANOR INC | 500 | 0 |
| BLANDFORD WATER DEPT | 442 | 0 |
| GRANBY HEIGHTS CONDOMINIUMS | 152 | 0 |
| WHITE BIRCHES MHP | 125 | 0 |
| VANTAGE AT HAMPDEN | 100 | 0 |
| SCANTIC VALLEY WATER DISTRICT | 100 | 0 |
| CRESCENT VALLEY CONDOS | 78 | 1 |
| WOODLAND WALK APARTMENTS | 76 | 0 |
| GRANVILLE CENTRE WATER CO | 70 | 0 |
| BRIMFIELD HOUSING AUTHORITY | 60 | 0 |
| HAMPDEN HOUSING AUTHORITY | 59 | 0 |
| PALATINE MANOR | 54 | 0 |
| BRETON ESTATES | 48 | 0 |
| WHITE BIRCH GARDEN APARTMENTS | 25 | 0 |
| SILVER MEADOW | 25 | 0 |
TRI Facilities (49)
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| PSC Resources | NPL Site | 38.66 |
Cities in Hampden (23)
Frequently Asked Questions
What is the environmental risk level in Hampden, Massachusetts? ▼
Are there Superfund sites in Hampden? ▼
How many toxic release facilities are in Hampden? ▼
What is the air quality in Hampden? ▼
Is the drinking water safe in Hampden? ▼
What environmental agencies cover Hampden? ▼
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.