Somerset, PA
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 Somerset in Pennsylvania · Population: 73,255
TRI sites such as North American Hoganas; Aaadcg Inc. Rockwood Div; Hoover Conveyor & Fabrication Corp; SDWIS systems such as WINDBER AREA AUTH; CONEMAUGH TWP MUNI AUTH; SOMERSET BORO MUNI WATER AUTH anchor Somerset, PA's EPA extract. Derived burden score 39/100 (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 Somerset include SOMERSET TWP MUNI AUTH OAKRIDG; MEYERSDALE MUNI AUTH; HIDDEN VALLEY RESORT LP, while North American Hoganas leads reported TRI pounds among local Form R filers. AQS median AQI 37 / peak 90 in 2024.
Burden score 39/100 (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 Somerset -- 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 Somerset, PA: EPA TRI 2023 reporting year
Same facilities, both years
-85.6%
5 facilities that filed in 2022 and 2023
Whole inventory
-85.6%
185.9 thousand lb → 26.7 thousand lb, every facility that filed
- Somerset, PA's total reported releases fell from 185.9 thousand lb in 2022 to 26.7 thousand lb in 2023, based on EPA TRI filings.
- Somerset, PA's off-site transfers fell from 181.1 thousand lb in 2022 to 21.8 thousand lb in 2023, based on EPA TRI filings.
- Somerset, PA's water releases rose from 143 lb in 2022 to 213 lb in 2023, based on EPA TRI filings.
- Somerset, PA's air releases rose from 4.7 thousand lb in 2022 to 4.8 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 | 323 (90%) | 35 | 0 | 90 |
| 2023 | 333 (91%) | 32 | 0 | 93 |
| 2022 | 351 (98%) | 9 | 0 | 90 |
| 2021 | 339 (93%) | 24 | 0 | 90 |
| 2020 | 357 (98%) | 8 | 0 | 71 |
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 Pennsylvania, see the EPA's AirNow.gov.
Water Systems (32)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| WINDBER AREA AUTH | 9,463 | 0 |
| CONEMAUGH TWP MUNI AUTH | 7,800 | 0 |
| SOMERSET BORO MUNI WATER AUTH | 6,309 | 0 |
| SOMERSET TWP MUNI AUTH OAKRIDG | 3,800 | 1 |
| BOSWELL BORO MUNI AUTH | 2,900 | 0 |
| MEYERSDALE MUNI AUTH | 2,566 | 16 |
| BERLIN BORO MUNI AUTH | 2,468 | 0 |
| CENTRAL CITY WATER AUTH | 1,984 | 0 |
| JENNERSTOWN MUNI AUTH | 1,625 | 0 |
| LINCOLN TWP MUNI AUTH | 1,400 | 0 |
| SOMERSET TWP M A FRIEDENS | 1,374 | 0 |
| ROCKWOOD BORO MUNI AUTH | 1,250 | 0 |
| INDIAN LAKE BORO WATERWORKS | 1,246 | 0 |
| CAIRNBROOK IMPROVEMENT ASSN | 910 | 0 |
| HIDDEN VALLEY RESORT LP | 750 | 1 |
| SALISBURY BORO WATER COMM | 725 | 0 |
| GRAY AREA WATR AUTH OF JEN TWP | 700 | 0 |
| CONFLUENCE BORO MUNI AUTH | 645 | 33 |
| HOOVERSVILLE BORO | 645 | 8 |
| JENNER TWP MUNI AUTH | 576 | 0 |
| SOMERSET TWP MA READING MINES | 494 | 4 |
| GARRETT BORO WATER SYS | 449 | 0 |
| JEFFERSON TWP WATER AND SEWER | 350 | 0 |
| ADDISON AREA WATER AUTH | 284 | 7 |
| SOMERSET TWP MUN AUTH LISTIE | 218 | 5 |
| GLADES PIKE ESTATES MHP LLC | 180 | 1 |
| LAUREL MOUNTAIN VILLAGE | 100 | 0 |
| WILBUR COMMUNITY WATER | 97 | 1 |
| STONEBRIDGE GARDENS MHP | 75 | 5 |
| MILFORD TWP MUNIC AUTH | 75 | 0 |
| REST ASSURED ASSISTED LIVING | 70 | 0 |
| SOMERSET CNTY QUEMAHONING SYST | 25 | 0 |
TRI Facilities (6)
| # | Facility | Total Releases |
|---|---|---|
| 1 | North American Hoganas | 933.0K lbs |
| 2 | Aaadcg Inc. Rockwood Div | 5.2K lbs |
| 3 | Hoover Conveyor & Fabrication Corp | 5 lbs |
| 4 | Berkebile Oil Co Inc | 0 lbs |
| 5 | 4 Guys Inc | 0 lbs |
| 6 | Iti Trailer & Truck Bodies Inc | 0 lbs |
Cities in Somerset (21)
Frequently Asked Questions
What is the environmental risk level in Somerset, Pennsylvania? ▼
Are there Superfund sites in Somerset? ▼
How many toxic release facilities are in Somerset? ▼
What is the air quality in Somerset? ▼
Is the drinking water safe in Somerset? ▼
What environmental agencies cover Somerset? ▼
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.