Delaware Water Quality Report
10 cities ranked · Average grade: C · New York
Avg Score
64.2
Cities Ranked
10
Health Violations
6
PFAS Detected
1
64.2
County avg score
10
Cities ranked
50%
A or B grade
40%
D or F grade
6
Health violations
1
PFAS detected
Grade Distribution
How Delaware cities scored
A
0
0%
Excellent
B
5
50%
Good
C
1
10%
Fair
D
2
20%
Poor
F
2
20%
Failing
Comparison
County vs New York average
▼ 16.5 pts below state average
City Map
Water quality across Delaware
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Delaware
County context
3
Superfund sites in Delaware
53,778
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: 53,778 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
AMPHENOL CORP SIDNEY, NY13838 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 53,778 |
FRIESLAND CAMPINA DELHI, NY13753 | — | — |
SAPUTO CHEESE USA INC. DELHI, NY13753 | — | — |
AMPHENOL CORP SIDNEY, NY13838 | — | — |
LACTALIS HERITAGE DAIRY CORP WALTON, NY13856 | — | — |
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.
- GCL TIE AND TREATING INC
- RICHARDSON HILL ROAD LANDFILL POND
- SIDNEY LANDFILL
Source: EPA Superfund National Priorities List
Full Rankings
All 10 cities in Delaware
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Stamford (V) | B+ | 84.8 | 1K | 6 | Health Unresolved | |
| 2 | Margaretville (V) | B+ | 83 | 600 | 18 | Unresolved | |
| 3 | Walton (V) | B | 77.9 | 3K | 32 | Health Unresolved | |
| 4 | Hancock (V) | B | 77.7 | 1K | 72 | Unresolved | |
| 5 | Hobart (V) | B- | 74.4 | 700 | 36 | Unresolved | |
| 6 | Sidney (V) | C | 63.3 | 4K | 80 | PFAS Unresolved | |
| 7 | Roxbury (T) | D | 48.1 | 1K | 126 | Health Unresolved | |
| 8 | Delhi (V) | D | 46 | 4K | 223 | Health Unresolved | |
| 9 | Davenport (T) | F | 44 | 898 | 229 | Health Unresolved | |
| 10 | Colchester (T) | F | 42.5 | 860 | 267 | Health Unresolved |