Delaware, PA
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.
Environmental data for Delaware in Pennsylvania · Population: 576,195
Delaware, PA is tracked across three EPA datasets covering 23 Toxics Release Inventory (TRI) facilities, 30 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 55/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 2.8M lbs of reported toxic releases under EPCRA Section 313, while 8 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 43 and a peak AQI of 136 in 2024, with 68% 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 | 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 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 | Population | Violations |
|---|---|---|
| AQUA PA MAIN SYSTEM | 822,600 | 2 |
| 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 | 1 |
| AQUA PA FRANKLIN | 265 | 0 |
| 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 | 35 |
| 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 |
Cities in Delaware (17)
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.