Delaware, 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 Delaware in Pennsylvania · Population: 576,195
TRI sites such as Monroe Energy Llc-Trainer Refinery; Braskem America Inc; Entegris Inc.; SDWIS systems such as AQUA PA MAIN SYSTEM; AQUA PA BENSALEM; AQUA PA WEST CHESTER; NPL sites such as Austin Avenue Radiation Site; Havertown PCP; Lansdowne Radiation Site anchor Delaware, PA's EPA extract. Derived burden score 80/100 (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 Delaware include AQUA PA MAIN SYSTEM; AQUA PA CHALFONT; AQUA PA SUPERIOR CENTER POINT, while Monroe Energy Llc-Trainer Refinery leads reported TRI pounds among local Form R filers. AQS median AQI 43 / peak 136 in 2024.
Burden score 80/100 (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 Delaware -- 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 Delaware, PA: EPA TRI 2023 reporting year
Same facilities, both years
+5.0%
18 facilities that filed in 2022 and 2023
Whole inventory
+4.7%
515.3 thousand lb → 539.5 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.
- Delaware, PA's total reported releases rose from 514.1 thousand lb in 2022 to 539.5 thousand lb in 2023, based on EPA TRI filings.
- Delaware, PA's off-site transfers rose from 17.5 thousand lb in 2022 to 251.6 thousand lb in 2023, based on EPA TRI filings.
- Delaware, PA's water releases fell from 240.0 thousand lb in 2022 to 48.0 thousand lb in 2023, based on EPA TRI filings.
- Delaware, PA's chemicals reported fell from 51 in 2022 to 47 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 | 250 (68%) | 114 | 2 | 136 |
| 2023 | 187 (51%) | 169 | 5 | 271 |
| 2022 | 191 (52%) | 174 | 0 | 95 |
| 2021 | 182 (50%) | 180 | 3 | 142 |
| 2020 | 174 (48%) | 189 | 3 | 129 |
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 (30)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| AQUA PA MAIN SYSTEM | 822,600 | 3 |
| AQUA PA BENSALEM | 59,001 | 0 |
| AQUA PA WEST CHESTER | 48,600 | 0 |
| AQUA PA UWCHLAN | 35,518 | 0 |
| AQUA PA BRISTOL | 28,727 | 0 |
| AQUA PA HATBORO | 12,901 | 0 |
| AQUA PA SUPERIOR MAIN SYSTEM | 11,400 | 0 |
| AQUA PA FRIENDSHIP | 8,800 | 0 |
| AQUA PA SPRING RUN | 8,151 | 0 |
| AQUA PA CHALFONT | 5,900 | 3 |
| AQUA PA FLYING HILLS WA SYS | 5,100 | 0 |
| AQUA PA PERKIOMEN TOWNSHIP | 3,600 | 0 |
| AQUA PA HONEYBROOK | 1,600 | 0 |
| AQUA PA PERKIOMEN WOODS | 1,100 | 0 |
| AQUA PA UPPER PROVIDENCE | 810 | 0 |
| AQUA PA EAST PIKELAND | 675 | 0 |
| AQUA PA PEDDLERS VIEW | 600 | 0 |
| AQUA PA STONECROFT | 600 | 0 |
| AQUA PA SUPERIOR CENTER POINT | 500 | 2 |
| CECIL WOODS M.H.P. DISTRIBUTION SYSTEM | 320 | 2 |
| AQUA PA FRANKLIN | 265 | 1 |
| AQUA PA SUPERIOR MEADOWBROOK | 250 | 0 |
| AQUA PA HILLCREST ESTATES II | 214 | 0 |
| AQUA PA GEIGERTOWN WATER SYS | 200 | 0 |
| BRINTON MANOR | 196 | 20 |
| PINECREST VILLAGE MHP | 195 | 36 |
| AQUA PA SUPERIOR IVY RIDGE | 150 | 0 |
| RIVEREDGE RENTALS | 80 | 2 |
| AQUA PA EAST POINTE | 75 | 0 |
| PATHWAYS | 53 | 13 |
TRI Facilities (23)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Monroe Energy Llc-Trainer Refinery | 2.1M lbs |
| 2 | Braskem America Inc | 305.6K lbs |
| 3 | Entegris Inc. | 247.2K lbs |
| 4 | Kimberly-Clark Pennsylvania L Lc | 69.4K lbs |
| 5 | Evonik Corp | 22.5K lbs |
| 6 | Sunoco Llc-Race Fuels | 8.4K lbs |
| 7 | Esschem Inc. | 6.5K lbs |
| 8 | 3M Aston | 3.8K lbs |
| 9 | Bullen Cos | 3.3K lbs |
| 10 | Congoleum Acquisition LLC | 783 lbs |
| 11 | Community Light & Sound Inc (dba Community Prof Loudspkr) | 778 lbs |
| 12 | Crown Foundry Co West Philadelphia Bronze | 204 lbs |
| 13 | Davis Vision | 113 lbs |
| 14 | The Boeing Co Defense Space & Security Rotorcraft Pr | 20 lbs |
| 15 | Srm - Sharon Hill | 19 lbs |
| 16 | Fisher Tank Co | 0 lbs |
| 17 | Pennsylvania Machine Works LLC | 0 lbs |
| 18 | Pyromet LLC | 0 lbs |
| 19 | Eddystone Generating Station | 0 lbs |
| 20 | Penn Panel & Box Co | 0 lbs |
| 21 | Cork Industries Inc | 0 lbs |
| 22 | Bryn Hill Industries | 0 lbs |
| 23 | Esstech Inc. | 0 lbs |
Superfund Sites (5)
| Site Name | Status | HRS Score |
|---|---|---|
| Austin Avenue Radiation Site | Deleted NPL Site | 0.00 |
| Havertown PCP | NPL Site | 38.34 |
| Lansdowne Radiation Site | Deleted NPL Site | 0.00 |
| Metro Container Corporation | NPL Site | 50.00 |
| Wade (ABM) | Deleted NPL Site | 36.63 |
Cities in Delaware (22)
Frequently Asked Questions
What is the environmental risk level in Delaware, Pennsylvania? ▼
Are there Superfund sites in Delaware? ▼
How many toxic release facilities are in Delaware? ▼
What is the air quality in Delaware? ▼
Is the drinking water safe in Delaware? ▼
What environmental agencies cover Delaware? ▼
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.