Delaware Water Quality Report
1 cities ranked · Average grade: B · Pennsylvania
Avg Score
79.3
Cities Ranked
1
Health Violations
0
PFAS Detected
1
79.3
County avg score
1
Cities ranked
100%
A or B grade
0%
D or F grade
0
Health violations
1
PFAS detected
Grade Distribution
How Delaware cities scored
A
0
0%
Excellent
B
1
100%
Good
C
0
0%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Pennsylvania average
▲ 21.0 pts above state average
City Map
Water quality across Delaware
Each dot is a city, colored by grade. Click any city to view its full report.
County context
3
Superfund sites in Delaware
47,970
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Delaware
Industrial polluters nearby
Facilities reporting the most surface-water releases in Delaware, 2023.
Total reported releases to surface water: 47,970 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
MONROE ENERGY LLC-TRAINER REFINERY TRAINER, PA19061 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 47,970 |
CROWN FOUNDRY CO WEST PHILADELPHIA BRONZE CHESTER, PA19013 | — | — |
FISHER TANK CO CHESTER, PA19013 | — | — |
ENTEGRIS INC. CHESTER, PA19013 | — | — |
EVONIK CORP CHESTER, PA19013 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Delaware
Superfund sites nearby
Federally tracked hazardous-waste sites within Delaware on the EPA National Priorities List.
- HAVERTOWN PCP
- LOWER DARBY CREEK AREA
- METRO CONTAINER CORPORATION
Source: EPA Superfund National Priorities List
Full Rankings
All 1 cities in Delaware
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Chester | B | 79.3 | 140K | 2 | PFAS Unresolved |