Plymouth, 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 Plymouth in Massachusetts · Population: 531,889
TRI sites such as Holcim Solutions & Products US LLC; Tech-Etch Inc; National Coating Corp; SDWIS systems such as BROCKTON WATER DEPARTMENT; PLYMOUTH WATER DEPARTMENT; WEIR RIVER WATER SYSTEM; NPL sites such as Cannon Engineering Corp. (CEC); Plymouth Harbor/Cannon Engineering Corp. anchor Plymouth, MA's EPA extract. Derived burden score 55/100 (Moderate 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 Plymouth include BROCKTON WATER DEPARTMENT; MARSHFIELD WATER DEPARTMENT; ABINGTON/ROCKLAND JOINT WTR. WORKS, while Holcim Solutions & Products US LLC leads reported TRI pounds among local Form R filers. AQS median AQI 37 / peak 97 in 2024.
Burden score 55/100 (Moderate 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 Plymouth -- 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 Plymouth, MA: EPA TRI 2023 reporting year
Same facilities, both years
+23.0%
13 facilities that filed in 2022 and 2023
Whole inventory
+23.0%
51.6 thousand lb → 63.5 thousand lb, every facility that filed
Between the two reporting years, 2 facilities filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Plymouth, MA's total reported releases rose from 51.6 thousand lb in 2022 to 63.5 thousand lb in 2023, based on EPA TRI filings.
- Plymouth, MA's air releases rose from 17.6 thousand lb in 2022 to 36.6 thousand lb in 2023, based on EPA TRI filings.
- Plymouth, MA's off-site transfers fell from 34.0 thousand lb in 2022 to 26.9 thousand lb in 2023, based on EPA TRI filings.
- Plymouth, MA's chemicals reported rose from 19 in 2022 to 20 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 | 97 |
| 2023 | 278 (76%) | 83 | 4 | 114 |
| 2022 | 235 (65%) | 125 | 0 | 93 |
| 2021 | 257 (70%) | 106 | 2 | 112 |
| 2020 | 267 (73%) | 99 | 0 | 80 |
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 (43)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| BROCKTON WATER DEPARTMENT | 105,788 | 5 |
| PLYMOUTH WATER DEPARTMENT | 47,100 | 0 |
| WEIR RIVER WATER SYSTEM | 45,339 | 0 |
| MARSHFIELD WATER DEPARTMENT | 34,000 | 2 |
| ABINGTON/ROCKLAND JOINT WTR. WORKS | 33,387 | 5 |
| MATTAPOISETT RIVER VALLEY W.D. | 29,600 | 0 |
| BRIDGEWATER WATER DEPARTMENT | 28,633 | 0 |
| WAREHAM FIRE DISTRICT | 20,102 | 3 |
| SCITUATE WATER DIVISION | 19,297 | 9 |
| PEMBROKE WATER DIVISION DPW | 18,175 | 3 |
| DUXBURY WATER DEPARTMENT | 16,387 | 0 |
| MIDDLEBOROUGH WATER SUPPLY | 15,350 | 0 |
| HANOVER WATER DEPT | 14,984 | 21 |
| WHITMAN WATER SYSTEM | 14,947 | 0 |
| KINGSTON WATER DEPARTMENT | 14,715 | 4 |
| EAST BRIDGEWATER WATER DEPT | 14,526 | 1 |
| NORWELL WATER DEPARTMENT | 11,495 | 0 |
| HANSON WATER DEPARTMENT | 9,612 | 0 |
| WEST BRIDGEWATER WATER DEPT | 7,709 | 0 |
| MATTAPOISETT WATER DEPARTMENT | 7,685 | 1 |
| HALIFAX WATER DEPARTMENT | 7,575 | 0 |
| MARION WATER DIVISION | 6,119 | 3 |
| ONSET FIRE DISTRICTWATER DEPT. | 5,392 | 1 |
| AGAWAM SPRINGS WATER COMPANY | 2,380 | 0 |
| SOUTH MEADOW VILLAGE | 750 | 1 |
| CRANBERRY VILLAGE RESIDENTS ASSOCIATION | 414 | 1 |
| LINDEN PONDS | 384 | 0 |
| CLARK SHORES WATER CORPORATION | 350 | 0 |
| PINETREE VILLAGE | 348 | 2 |
| NORTH CARVER WATER DISTRICT | 300 | 1 |
| TOWNHOUSES @ COPPER LANTERN | 176 | 0 |
| JAKES PATH PWS | 168 | 1 |
| MEADOW WOODS ESTATE HOMEOWNERS ASSN, INC | 120 | 0 |
| WATERVIEW PARK LLC | 102 | 0 |
| CARVER MUNICIPAL BUILDINGS | 100 | 0 |
| NEMASKET HEALTH CARE CENTER | 90 | 0 |
| LONG POND REALTY TRUST | 90 | 5 |
| LAKE POINT VILLAGE | 66 | 0 |
| BISHOPS LANDING CONDOMINIUMS | 50 | 0 |
| RAYMOND WOODS TOWNHOUSES | 50 | 32 |
| CRANBERRY KNOLL | 40 | 0 |
| BEARFOOT CREEK | 28 | 1 |
| HERRING COVE CONDOMINIUMS TRUST | 25 | 0 |
TRI Facilities (18)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Holcim Solutions & Products US LLC | 116.5K lbs |
| 2 | Tech-Etch Inc | 89.4K lbs |
| 3 | National Coating Corp | 81.1K lbs |
| 4 | 3M Co | 29.3K lbs |
| 5 | Veolia Es Technical Solutions | 21.1K lbs |
| 6 | Gem Gravure Co Inc. | 4.1K lbs |
| 7 | Electropolishing Systems Inc | 500 lbs |
| 8 | Russelectric a Siemens Business | 252 lbs |
| 9 | Avedis Zildjian Co. | 145 lbs |
| 10 | Scituate Concrete Pipe | 24 lbs |
| 11 | Pavestone - Boston Ma Plant | 3 lbs |
| 12 | Cape Cod Ready Mix Carver | 0 lbs |
| 13 | Byrne Sand & Gravel Inc. | 0 lbs |
| 14 | Ocean Spray Cranberries Inc | 0 lbs |
| 15 | Hapco Inc | 0 lbs |
| 16 | Electroswitch Switches & Relays | 0 lbs |
| 17 | Lockheed Martin Sippican | 0 lbs |
| 18 | Shea Concrete Products - Rochester | 0 lbs |
Superfund Sites (2)
| Site Name | Status | HRS Score |
|---|---|---|
| Cannon Engineering Corp. (CEC) | Deleted NPL Site | 39.89 |
| Plymouth Harbor/Cannon Engineering Corp. | Deleted NPL Site | 54.82 |
Cities in Plymouth (29)
Frequently Asked Questions
What is the environmental risk level in Plymouth, Massachusetts? ▼
Are there Superfund sites in Plymouth? ▼
How many toxic release facilities are in Plymouth? ▼
What is the air quality in Plymouth? ▼
Is the drinking water safe in Plymouth? ▼
What environmental agencies cover Plymouth? ▼
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.