Norfolk, 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 Norfolk in Massachusetts · Population: 724,540
TRI sites such as Wollaston Alloys; Clean Harbors of Braintree Inc.; Globe Composite Solutions LLC; SDWIS systems such as QUINCY WATER DEPT. (MWRA); BROOKLINE WATER AND SEWER DIVISION; WEYMOUTH WATER DEPARTMENT; NPL sites such as Baird & McGuire; BJAT LLC; Blackburn and Union Privileges anchor Norfolk, MA's EPA extract. Derived burden score 91/100 (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 Norfolk include QUINCY WATER DEPT. (MWRA); BROOKLINE WATER AND SEWER DIVISION; WEYMOUTH WATER DEPARTMENT, while Wollaston Alloys leads reported TRI pounds among local Form R filers. AQS median AQI 39 / peak 90 in 2024.
Burden score 91/100 (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 Norfolk -- 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 Norfolk, MA: EPA TRI 2023 reporting year
Same facilities, both years
-18.2%
33 facilities that filed in 2022 and 2023
Whole inventory
-18.2%
340.8 thousand lb → 278.7 thousand lb, every facility that filed
Between the two reporting years, 2 facilities filed for the first time and 5 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Norfolk, MA's total reported releases fell from 339.8 thousand lb in 2022 to 277.9 thousand lb in 2023, based on EPA TRI filings.
- Norfolk, MA's land releases rose from 0 lb in 2022 to 192 lb in 2023, based on EPA TRI filings.
- Norfolk, MA's off-site transfers fell from 291.4 thousand lb in 2022 to 237.6 thousand lb in 2023, based on EPA TRI filings.
- Norfolk, MA's air releases fell from 48.4 thousand lb in 2022 to 40.1 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 | 319 (87%) | 47 | 0 | 90 |
| 2023 | 276 (76%) | 85 | 4 | 136 |
| 2022 | 304 (83%) | 60 | 1 | 105 |
| 2021 | 280 (77%) | 82 | 3 | 133 |
| 2020 | 330 (90%) | 36 | 0 | 74 |
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 (41)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| QUINCY WATER DEPT. (MWRA) | 106,000 | 3 |
| BROOKLINE WATER AND SEWER DIVISION | 63,191 | 4 |
| WEYMOUTH WATER DEPARTMENT | 57,871 | 1 |
| RANDOLPH/HOLBROOK JOINT WATER BOARD | 46,519 | 0 |
| DEDHAM WESTWOOD WATER DIST. | 41,630 | 1 |
| BRAINTREE WATER AND SEWER DEPT. | 39,143 | 0 |
| RANDOLPH WATER DEPARTMENT | 35,114 | 0 |
| FRANKLIN WATER DEPARTMENT | 33,706 | 0 |
| NEEDHAM WATER DEPT | 31,664 | 3 |
| NORWOOD WATER DEPT. (MWRA) | 29,909 | 5 |
| WELLESLEY WATER DIVISION | 29,550 | 1 |
| STOUGHTON WATER DEPARTMENT | 29,281 | 1 |
| MILTON WATER DEPT. (MWRA) | 28,630 | 5 |
| WALPOLE WATER DEPT | 24,070 | 1 |
| CANTON WATER DEPT | 22,766 | 0 |
| FOXBORO WATER DEPARTMENT | 18,721 | 0 |
| SHARON WATER DEPT | 16,846 | 0 |
| BELLINGHAM DPW WATER SEWER DIVISION | 16,556 | 23 |
| MEDWAY WATER DEPARTMENT | 14,176 | 1 |
| MEDFIELD WATER DEPT. | 12,713 | 3 |
| WRENTHAM WATER DIVISION | 12,190 | 0 |
| HOLBROOK PUBLIC WORKS DEPT | 11,405 | 2 |
| MILLIS WATER DEPT | 9,055 | 0 |
| PLAINVILLE WATER DEPARTMENT | 8,805 | 20 |
| NORFOLK WATER DIVISION | 7,602 | 1 |
| COHASSET WATER DEPT | 7,555 | 1 |
| TOWN OF AVON | 4,777 | 2 |
| WELLESLEY COLLEGE | 3,000 | 1 |
| SOUTHFIELD REDEVELOPEMENT AUTHORITY | 2,300 | 0 |
| WRENTHAM DEVELOPMENTAL CENTER | 937 | 5 |
| GLEN RIDGE RESIDENTS TRUST | 131 | 0 |
| WINNSTOCK CONDOS | 125 | 1 |
| MARLIN VILLAGE MOBILE HOME PARK | 95 | 2 |
| NORTHBROOK VILLAGE II | 80 | 2 |
| MOUNT ST MARYS ABBEY | 60 | 26 |
| MEADOWBROOK WATER TRUST | 57 | 0 |
| JUSTICE RESOURCE INSTITUTE, INC. | 56 | 0 |
| OLD FARM ROAD WATER TRUST | 40 | 2 |
| FISHERFIELD TOWNHOUSES | 40 | 0 |
| JEMP 1 LLC | 28 | 0 |
| TRI TOWN WATER BOARD | 25 | 0 |
TRI Facilities (44)
Superfund Sites (5)
| Site Name | Status | HRS Score |
|---|---|---|
| Baird & McGuire | NPL Site | 66.35 |
| BJAT LLC | NPL Site | 41.91 |
| Blackburn and Union Privileges | NPL Site | 50.00 |
| Norwood PCBs | Deleted NPL Site | 29.43 |
| South Weymouth Naval Air Station | NPL Site | 50.00 |
Cities in Norfolk (30)
Frequently Asked Questions
What is the environmental risk level in Norfolk, Massachusetts? ▼
Are there Superfund sites in Norfolk? ▼
How many toxic release facilities are in Norfolk? ▼
What is the air quality in Norfolk? ▼
Is the drinking water safe in Norfolk? ▼
What environmental agencies cover Norfolk? ▼
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.