Allegheny, PA
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against every other tracked county rather than against fixed national thresholds.
Environmental data for Allegheny in Pennsylvania · Population: 1,240,476
Allegheny, PA is tracked across three EPA datasets covering 50 Toxics Release Inventory (TRI) facilities, 41 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 74/100 (High Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 46.8M lbs of reported toxic releases under EPCRA Section 313, while 22 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 52 and a peak AQI of 129 in 2024, with 48% of observed days rated "Good" (0–50).
All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.
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 | 175 (48%) | 182 | 9 | 129 |
| 2023 | 121 (33%) | 227 | 15 | 237 |
| 2022 | 129 (35%) | 225 | 10 | 151 |
| 2021 | 118 (32%) | 240 | 6 | 154 |
| 2020 | 138 (38%) | 218 | 10 | 128 |
Source: EPA Air Quality System (AQS) Annual AQI by County 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 (41)
| System | Population | Violations |
|---|---|---|
| PITTSBURGH WATER & SEWER AUTH | 520,000 | 2 |
| WEST VIEW WATER AUTHORITY | 200,000 | 2 |
| WILKINSBURG-PENN JT WATER AUTH | 125,000 | 1 |
| HAMPTON SHALER WATER AUTHORITY | 61,949 | 0 |
| MONROEVILLE MUNICIPAL AUTH | 48,500 | 6 |
| OAKMONT WATER AUTHORITY | 39,901 | 0 |
| MOON TWP MUNI AUTH | 38,000 | 2 |
| PLUM BORO MUNI AUTH | 27,500 | 2 |
| WESTERN ALLEGHENY COUNTY MUN A | 19,031 | 2 |
| FOX CHAPEL AUTH | 18,500 | 0 |
| ROBINSON TWP MUNI AUTH | 16,354 | 0 |
| HARRISON TWP WATER AUTH | 13,411 | 0 |
| RICHLAND TWP WATER AUTHORITY | 10,190 | 0 |
| EDGEWORTH BORO MUNI AUTH | 7,781 | 2 |
| SEWICKLEY BORO WATER AUTH | 6,800 | 1 |
| NEVILLE TWP WATER DEPT | 6,750 | 0 |
| CORAOPOLIS WATER & SEWER AUTH | 5,804 | 0 |
| DUQUESNE WATER DEPT | 5,565 | 13 |
| TARENTUM BORO WATER DEPT | 4,927 | 2 |
| FAWN FRAZER JT WATER AUTH | 4,650 | 13 |
| BRACKENRIDGE BORO WATER DEPT | 3,700 | 2 |
| SPRINGDALE BORO WATER DEPT | 3,405 | 0 |
| RESERVE TWP WATER DEPT | 3,204 | 0 |
| HARMAR TWP MUNI AUTH | 3,200 | 0 |
| ASPINWALL BORO WATER DEPT | 3,151 | 6 |
| BLAWNOX BORO WATER DEPT | 2,200 | 75 |
| ALEPPO TWP AUTH | 2,200 | 0 |
| EAST DEER TWP WATER DEPT | 2,000 | 2 |
| CHESWICK BORO WATER DEPT | 1,861 | 0 |
| BRADDOCK BORO WATER AUTH | 1,708 | 5 |
| TOWNSHIP OF SPRINGDALE | 1,600 | 1 |
| OAKDALE BORO WATER DEPT | 1,459 | 0 |
| CARSON TOWERS | 266 | 0 |
| EVERGREEN WILDWOOD MOBILE HOME PARK | 230 | 9 |
| BELLEVUE MOBILE HOME PARK | 190 | 2 |
| RIVERSBEND MOBILE HOME PARK | 180 | 0 |
| EVERGREEN PLEASANT VALLEY TRAILER PARK | 94 | 4 |
| FAIRFIELD MANOR MHP | 92 | 2 |
| COUNTRYSIDE ESTATES MHP | 39 | 0 |
| CRESTVIEW MOBILE HOME PARK | 35 | 0 |
| CRYSTAL SPRINGS MHP | 25 | 0 |
TRI Facilities (50)
Cities in Allegheny (36)
Frequently Asked Questions
What is the environmental risk level in Allegheny, Pennsylvania? ▼
Are there Superfund sites in Allegheny? ▼
How many toxic release facilities are in Allegheny? ▼
What is the air quality in Allegheny? ▼
Is the drinking water safe in Allegheny? ▼
What environmental agencies cover Allegheny? ▼
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.