Chester, 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 Chester in Pennsylvania · Population: 540,896
TRI sites such as Cleveland-Cliffs Plate LLC Coatesville Facility; Whitford Corp; Johnson Matthey Inc; SDWIS systems such as PA AMERICAN ROYERSFORD; PA AMERICAN COATESVILLE; PHOENIXVILLE WATER DEPT; NPL sites such as A.I.W. Frank/Mid-County Mustang; Blosenski Landfill; Foote Mineral Co. anchor Chester, PA's EPA extract. Derived burden score 84/100 (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 Chester include PA AMERICAN ROYERSFORD; PA AMERICAN COATESVILLE; PHOENIXVILLE WATER DEPT, while Cleveland-Cliffs Plate LLC Coatesville Facility leads reported TRI pounds among local Form R filers. AQS median AQI 41 / peak 143 in 2024.
Burden score 84/100 (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 Chester -- 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 Chester, PA: EPA TRI 2023 reporting year
Same facilities, both years
+16.6%
30 facilities that filed in 2022 and 2023
Whole inventory
+18.3%
192.1 thousand lb → 227.2 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.
- Chester, PA's total reported releases rose from 192.1 thousand lb in 2022 to 224.0 thousand lb in 2023, based on EPA TRI filings.
- Chester, PA's water releases fell from 739 lb in 2022 to 421 lb in 2023, based on EPA TRI filings.
- Chester, PA's off-site transfers rose from 58.5 thousand lb in 2022 to 83.3 thousand lb in 2023, based on EPA TRI filings.
- Chester, PA's air releases rose from 36.1 thousand lb in 2022 to 47.6 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 | 264 (73%) | 96 | 3 | 143 |
| 2023 | 220 (61%) | 134 | 3 | 248 |
| 2022 | 249 (68%) | 115 | 0 | 80 |
| 2021 | 215 (62%) | 130 | 2 | 138 |
| 2020 | 233 (66%) | 121 | 1 | 143 |
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 (61)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| PA AMERICAN ROYERSFORD | 49,508 | 3 |
| PA AMERICAN COATESVILLE | 36,960 | 1 |
| PHOENIXVILLE WATER DEPT | 16,599 | 3 |
| DOWNINGTOWN WATER AUTHORITY | 9,900 | 0 |
| KENNETT SQUARE MUN WATER WORKS | 6,328 | 6 |
| OXFORD BOROUGH | 5,280 | 0 |
| LONDON GROVE TWP MUN AUTH | 4,770 | 0 |
| HONEY BROOK BORO WATER | 2,892 | 2 |
| WEST GROVE BOROUGH | 2,873 | 2 |
| COMMUNITY UTILITES WESTGATE | 2,668 | 0 |
| COATESVILLE VETERANS ADM HOSP | 2,000 | 0 |
| ELVERSON WATER COMPANY | 1,641 | 0 |
| BOROUGH OF ATGLEN | 1,406 | 0 |
| BOROUGH OF AVONDALE | 1,108 | 0 |
| TEL HAI RETIREMENT COMMUNITY | 930 | 0 |
| RIDGLEA | 900 | 0 |
| WESTTOWN SCHOOL | 900 | 1 |
| NOTTINGHAM MANOR M H COURT | 473 | 2 |
| CRESTWOOD COMMUNITY | 470 | 0 |
| APPLEVILLE MOBILE HOME PARK | 461 | 1 |
| SPRING RUN ESTATES WTP | 450 | 5 |
| LONGWOOD GARDENS | 440 | 2 |
| BIG SPRING TERRACE MHP | 439 | 0 |
| CAPE MAY MOBILE ESTATES | 420 | 2 |
| HILLCREST COMMUNITIES LP | 350 | 0 |
| WETHERILL ESTATES | 250 | 8 |
| MARTINS COMMUNITY LP MHP | 180 | 0 |
| SMITHVILLE MHP | 166 | 1 |
| CHESAPEAKE ESTATES MOBILE HOME PARK | 159 | 0 |
| CAMPHILL SOLTANE | 152 | 0 |
| CAMPHILL SPEC SCH BEAVER RUN | 140 | 0 |
| STONEYHILL MHP | 124 | 7 |
| TWIN PINES HEALTH CARE CENTER | 120 | 5 |
| STONE BARN RENTALS | 120 | 2 |
| BARTON COURT | 118 | 11 |
| WINDHAVEN MHP | 112 | 0 |
| SOUTHS MOBILE HOME PARK | 110 | 0 |
| MALAGA MOBILE HOME PARK | 100 | 0 |
| CAMPHILL VILLAGE KIMBERTON HLS | 100 | 9 |
| FREEMANSBURG MHC | 90 | 2 |
| WILLIAMS MOBILE HOME PARK | 87 | 1 |
| WOODBROOKE WATER AUTHORITY | 87 | 0 |
| ST MARY OF PROVIDENCE CENTER | 75 | 6 |
| WOODLAND EST MOBILE HOMES | 72 | 5 |
| KADIMA REHAB | 70 | 1 |
| LAKE RD MHP MENU MATE MUSHROOM | 65 | 2 |
| PERRY PHILLIPS MOBILE HOMES | 60 | 3 |
| SK PROPERTIES LP MISTY MEADOWS | 60 | 4 |
| LITTLE BRITAIN MHP | 60 | 2 |
| HIGHLAND COURT | 54 | 3 |
| TAYLORS MOBILE HOME PARK | 50 | 0 |
| BERKS HILL ESTATES | 50 | 5 |
| MEADOWS AT BETHEL MHP | 50 | 8 |
| PINE TERRACE MOBILE HOME PARK | 50 | 1 |
| CAMPHILL SPEC SCH BEAVER FARM | 45 | 0 |
| LENAPE HILLS TRAILER PARK | 44 | 4 |
| PERRY LAKE ESTATES | 44 | 4 |
| WARWICK MOBILE HOME PARK | 40 | 6 |
| DRUMORE MHP | 40 | 0 |
| BIG BOULDER MHP | 40 | 0 |
| DOE RUN MOBILE HOME PARK | 29 | 12 |
TRI Facilities (38)
Superfund Sites (11)
| Site Name | Status | HRS Score |
|---|---|---|
| A.I.W. Frank/Mid-County Mustang | NPL Site | 42.40 |
| Blosenski Landfill | NPL Site | 30.57 |
| Foote Mineral Co. | NPL Site | 50.00 |
| Kimberton | NPL Site | 29.44 |
| Malvern TCE | NPL Site | 46.69 |
| Old Wilmington Road Ground Water Contamination | NPL Site | 50.00 |
| Paoli Rail Yard | NPL Site | 32.18 |
| Recticon/Allied Steel Corp. | Deleted NPL Site | 32.06 |
| Strasburg Landfill | Deleted NPL Site | 30.71 |
| Walsh Landfill | NPL Site | 33.64 |
| William Dick Lagoons | NPL Site | 36.64 |
Cities in Chester (34)
Frequently Asked Questions
What is the environmental risk level in Chester, Pennsylvania? ▼
Are there Superfund sites in Chester? ▼
How many toxic release facilities are in Chester? ▼
What is the air quality in Chester? ▼
Is the drinking water safe in Chester? ▼
What environmental agencies cover Chester? ▼
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.