Montgomery, 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. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for Montgomery in Pennsylvania · Population: 861,225
TRI sites such as Jbs Souderton Inc - Rendering Div; Superior Tube Co Inc; Viant Collegeville LLC; SDWIS systems such as NORTH PENN WATER AUTHORITY; PA AMERICAN NORRISTOWN; NORTH WALES WATER AUTHORITY; NPL sites such as Ambler Asbestos Piles; Baghurst Drive; BoRit Asbestos anchor Montgomery, PA's EPA extract. Derived burden score 96/100 (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 Montgomery include POTTSTOWN BOROUGH WATER AUTH; HORSHAM WATER&SEWER AUTHORITY; NWWA WARRINGTON TOWNSHIP, while Jbs Souderton Inc - Rendering Div leads reported TRI pounds among local Form R filers. AQS median AQI 40 / peak 140 in 2024.
Burden score 96/100 (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 Montgomery -- 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 Montgomery, PA: EPA TRI 2023 reporting year
Same facilities, both years
-30.8%
45 facilities that filed in 2022 and 2023
Whole inventory
-31.8%
1.1 million lb → 732.6 thousand lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Montgomery, PA's total reported releases fell from 1.1 million lb in 2022 to 732.6 thousand lb in 2023, based on EPA TRI filings.
- Montgomery, PA's water releases fell from 648.4 thousand lb in 2022 to 338.0 thousand lb in 2023, based on EPA TRI filings.
- Montgomery, PA's off-site transfers fell from 123.6 thousand lb in 2022 to 100.3 thousand lb in 2023, based on EPA TRI filings.
- Montgomery, PA's chemicals reported rose from 60 in 2022 to 63 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 | 266 (73%) | 98 | 1 | 140 |
| 2023 | 232 (64%) | 127 | 1 | 284 |
| 2022 | 237 (65%) | 124 | 1 | 108 |
| 2021 | 202 (57%) | 148 | 6 | 150 |
| 2020 | 269 (73%) | 97 | 0 | 99 |
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 (51)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| NORTH PENN WATER AUTHORITY | 91,941 | 0 |
| PA AMERICAN NORRISTOWN | 88,885 | 0 |
| NORTH WALES WATER AUTHORITY | 72,496 | 0 |
| POTTSTOWN BOROUGH WATER AUTH | 36,000 | 6 |
| HORSHAM WATER&SEWER AUTHORITY | 26,000 | 2 |
| NWWA WARRINGTON TOWNSHIP | 21,588 | 3 |
| AMBLER BORO WATER DEPT | 20,000 | 0 |
| COLLEGEVILLE TRAPPE JOINT PWD | 8,470 | 2 |
| PA AMERICAN AUDUBON | 8,200 | 0 |
| TELFORD BOROUGH AUTHORITY | 7,700 | 0 |
| SCHWENKSVILLE BOROUGH AUTH | 5,200 | 1 |
| UPPER HANOVER WATER AUTHORITY | 4,600 | 0 |
| E GREENVILLE BORO WATER DEPT | 3,100 | 1 |
| NORTH COVENTRY WATER SYSTEM | 2,907 | 4 |
| RED HILL WATER AUTHORITY | 2,500 | 0 |
| VILLAGE OF NESHAMINY FALLS | 1,300 | 0 |
| PARKHOUSE NURSING & REHAB CTR | 1,200 | 2 |
| NWWA OLDE COLONIAL GREENE | 900 | 0 |
| AQUA PA WHITE ROCK ACRES SYS | 790 | 3 |
| MT VILLAGE MHP | 771 | 0 |
| HEREFORD EST MHP | 710 | 0 |
| NWWA PINE RUN | 700 | 0 |
| FREDERICK LIVING | 640 | 0 |
| PERKIOMEN CROSSING | 508 | 0 |
| AQUA PA LINKS AT GETTYSBURG SY | 398 | 0 |
| AVANTE APARTMENTS | 315 | 0 |
| AWC VALLEY FORGE CROSSING MHP | 250 | 0 |
| HILLTOP MOBILE ESTATES | 220 | 0 |
| CREEKVIEW MHP | 200 | 3 |
| YERKES WATER ASSOCIATION | 165 | 10 |
| NWWA DURHAM VILLAGE | 160 | 1 |
| SPRUCE COURT APARTMENTS | 139 | 0 |
| OAK GROVE PARK MHP | 130 | 0 |
| HARRISONVILLE MOBILE HOME PARK | 100 | 0 |
| WARWICK WATER WORKS | 98 | 7 |
| NWWA YORKSHIRE MEADOWS | 90 | 0 |
| WOODED RIDGE DEVELOPMENT | 90 | 1 |
| SITTLERS MHP | 89 | 10 |
| FAIRMOUNT MHP, L.P. | 80 | 2 |
| NWWA HERMITAGE | 75 | 0 |
| HYLAND MHP | 75 | 1 |
| DOCK WOODS COMMUNITY | 72 | 0 |
| PAW BERRY HOLLOW | 70 | 0 |
| WOODLAND MHP | 61 | 0 |
| QUAKER VIEW MOBILE HOME PARK | 60 | 6 |
| SAINT LUKE KNOLLS | 50 | 0 |
| BEAVER RUN WATER ASSOCIATION | 50 | 0 |
| EMERY COVE ESTATES | 48 | 0 |
| COUNTRY HILLS APTS | 40 | 0 |
| WEC INTERNATIONAL | 25 | 8 |
| RIDGEBURY MOBILE MANOR | 23 | 0 |
TRI Facilities (50)
Superfund Sites (19)
| Site Name | Status | HRS Score |
|---|---|---|
| Ambler Asbestos Piles | Deleted NPL Site | 34.47 |
| Baghurst Drive | NPL Site | 50.00 |
| BoRit Asbestos | NPL Site | 50.00 |
| Commodore Semiconductor Group | NPL Site | 42.35 |
| Crater Resources, Inc./Keystone Coke Co./Alan Wood Steel Co. | NPL Site | 50.00 |
| Henderson Road | NPL Site | 41.69 |
| Moyers Landfill | Deleted NPL Site | 37.62 |
| North Penn - Area 1 | NPL Site | 35.57 |
| North Penn - Area 12 | NPL Site | 28.90 |
| North Penn - Area 2 | NPL Site | 35.57 |
| North Penn - Area 5 | NPL Site | 35.57 |
| North Penn - Area 6 | NPL Site | 35.57 |
| North Penn - Area 7 | NPL Site | 35.57 |
| Occidental Chemical Corp./Firestone Tire & Rubber Co. | NPL Site | 45.91 |
| Raymark | NPL Site | 53.42 |
| Salford Quarry | NPL Site | 50.00 |
| Stanley Kessler | NPL Site | 33.89 |
| Tysons Dump | NPL Site | 63.10 |
| Willow Grove Naval Air and Air Reserve Station | NPL Site | 50.00 |
Cities in Montgomery (42)
Frequently Asked Questions
What is the environmental risk level in Montgomery, Pennsylvania? ▼
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What environmental agencies cover Montgomery? ▼
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.