Mercer, 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 Mercer in Pennsylvania · Population: 109,852
TRI sites such as Zekelman Industries Co DBA Wheatland Tube Co-Council; Zekelman Industries, Sharon Tube Division-Church St; Salem Tube Inc.; SDWIS systems such as AQUA PA SHENANGO VALLEY WTP; AQUA PA GREENVILLE; GROVE CITY BORO WATER DEPT; NPL sites such as Osborne Landfill; River Road Landfill (Waste Management, Inc.); Sharon Steel Corp (Farrell Works Disposal Area) anchor Mercer, PA's EPA extract. Derived burden score 82/100 (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 Mercer include AQUA PA GREENVILLE; AQUA PA INC TREASURE LAKE DIV; REYNOLDS WATER COMPANY, while Zekelman Industries Co DBA Wheatland Tube Co-Council leads reported TRI pounds among local Form R filers. AQS median AQI 40 / peak 97 in 2024.
Burden score 82/100 (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 Mercer -- 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 Mercer, PA: EPA TRI 2023 reporting year
Same facilities, both years
-9.5%
29 facilities that filed in 2022 and 2023
Whole inventory
-0.1%
424.4 thousand lb → 424.1 thousand lb, every facility that filed
Between the two reporting years, 2 facilities filed for the first time and 0 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Mercer, PA's water releases fell from 10.6 thousand lb in 2022 to 9.5 thousand lb in 2023, based on EPA TRI filings.
- Mercer, PA's off-site transfers rose from 196.1 thousand lb in 2022 to 213.2 thousand lb in 2023, based on EPA TRI filings.
- Mercer, PA's air releases fell from 217.8 thousand lb in 2022 to 201.4 thousand lb in 2023, based on EPA TRI filings.
- Mercer, PA's chemicals reported fell from 46 in 2022 to 45 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 | 274 (75%) | 92 | 0 | 97 |
| 2023 | 237 (65%) | 122 | 3 | 196 |
| 2022 | 288 (79%) | 74 | 3 | 136 |
| 2021 | 277 (76%) | 85 | 1 | 112 |
| 2020 | 272 (74%) | 93 | 1 | 105 |
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 (29)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| AQUA PA SHENANGO VALLEY WTP | 48,000 | 0 |
| AQUA PA GREENVILLE | 8,600 | 1 |
| GROVE CITY BORO WATER DEPT | 7,871 | 0 |
| SHARPSVILLE BORO WATER CO | 5,029 | 0 |
| NEW WILMINGTON BORO WATER DEPT | 4,500 | 0 |
| AQUA PA JENKS TWP WTP | 4,320 | 0 |
| AQUA PA INC TREASURE LAKE DIV | 4,155 | 1 |
| PINE TWP WATER DISTR SYSTEM | 3,082 | 0 |
| REYNOLDS WATER COMPANY | 2,370 | 17 |
| AQUA PA CRAWFORD DIV | 2,300 | 0 |
| BUHL COMMUNITY WATER COMPANY | 2,227 | 1 |
| AQUA PA LAKE LATONKA WTP | 1,600 | 6 |
| BARKEYVILLE MUN AUTHORITY | 1,600 | 0 |
| SANDY LAKE BORO | 1,100 | 0 |
| MAHONING TOWNSHIP | 1,032 | 0 |
| ST PAUL HOMES | 1,000 | 0 |
| AQUA PA MT JEWETT | 972 | 2 |
| STONEBORO WATER WORKS | 956 | 0 |
| AQUA PA CLARENDON | 840 | 52 |
| SOUTH PYMATUNING | 641 | 0 |
| FRYBURG WATER COMPANY | 490 | 2 |
| WEST HICKORY WATER COMPANY | 450 | 0 |
| FREDONIA BORO | 443 | 3 |
| PINE GROVE MOBILE HOME PARK | 244 | 5 |
| GREENVILLE MHP | 150 | 0 |
| LIBERTY TOWNSHIP | 138 | 0 |
| SUNNYVIEW MOBILE HOME PARK | 88 | 2 |
| GRANDVIEW ACRES MHP | 70 | 2 |
| GREYSTONE COUNTRY ESTATES | 55 | 2 |
TRI Facilities (35)
Superfund Sites (4)
| Site Name | Status | HRS Score |
|---|---|---|
| Osborne Landfill | NPL Site | 54.60 |
| River Road Landfill (Waste Management, Inc.) | Deleted NPL Site | 43.12 |
| Sharon Steel Corp (Farrell Works Disposal Area) | NPL Site | 50.00 |
| Westinghouse Electric Corp. (Sharon Plant) | NPL Site | 41.33 |
Cities in Mercer (16)
Frequently Asked Questions
What is the environmental risk level in Mercer, Pennsylvania? ▼
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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.