New Castle Water Quality Report
9 cities ranked · Average grade: B · Delaware
Avg Score
79.4
Cities Ranked
9
Health Violations
7
PFAS Detected
5
79.4
County avg score
9
Cities ranked
89%
A or B grade
0%
D or F grade
7
Health violations
5
PFAS detected
Grade Distribution
How New Castle cities scored
A
2
22%
Excellent
B
6
67%
Good
C
1
11%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Delaware average
▲ 2.3 pts above state average
City Map
Water quality across New Castle
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in New Castle
Worst cities
County context
12
Superfund sites in New Castle
95.7%
of residents on fluoridated water (CDC, 2020)
4,352,607
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in New Castle
Industrial polluters nearby
Facilities reporting the most surface-water releases in New Castle, 2023.
Total reported releases to surface water: 4,352,607 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
DELAWARE CITY REFINERY DELAWARE CITY, DE19706 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 4,352,506 |
V&S DELAWARE GALVANIZING LLC NEW CASTLE, DE19720 | Zinc compounds | 97 |
EDGE MOOR/HAY ROAD ENERGY CENTERS WILMINGTON, DE19809 | Ammonia | 3 |
ROGERS CORP - BEAR BEAR, DE19701 | — | — |
NEXPERA - RED LION PLANT NEW CASTLE, DE19720 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in New Castle
Superfund sites nearby
Federally tracked hazardous-waste sites within New Castle on the EPA National Priorities List.
- ARMY CREEK LANDFILL
- DELAWARE CITY PVC PLANT
- DELAWARE SAND GRAVEL LANDFILL
- E I DU PONT DE NEMOURS CO INC NEWPORT PIGMENT PLANT LANDFILL
- EAST BASIN ROAD GROUNDWATER
+ 7 more sites
Source: EPA Superfund National Priorities List
Full Rankings
All 9 cities in New Castle
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Delaware City | A+ | 96.9 | 3K | 3 | ||
| 2 | Odessa | A- | 89.6 | 6K | 7 | Health Unresolved | |
| 3 | Winterthur | B+ | 82.5 | 687 | 4 | Unresolved | |
| 4 | Middletown | B+ | 80.1 | 30K | 45 | Health Unresolved | |
| 5 | Wilmington | B | 79.5 | 208K | 23 | Health PFAS Unresolved | |
| 6 | Bear | B | 79 | 232K | 8 | Health PFAS Unresolved | |
| 7 | Bear | B | 79 | 231K | 8 | Health PFAS Unresolved | |
| 8 | New Castle | B- | 71.7 | 108K | 31 | Health PFAS Unresolved | |
| 9 | Newark | C- | 56.5 | 49K | 132 | Health PFAS Unresolved |