Suffolk Water Quality Report
11 cities ranked · Average grade: B- · New York
Avg Score
73
Cities Ranked
11
Health Violations
11
PFAS Detected
9
73
County avg score
11
Cities ranked
64%
A or B grade
9%
D or F grade
11
Health violations
9
PFAS detected
Grade Distribution
How Suffolk cities scored
A
2
18%
Excellent
B
5
45%
Good
C
3
27%
Fair
D
1
9%
Poor
F
0
0%
Failing
Comparison
County vs New York average
▼ 7.7 pts below state average
City Map
Water quality across Suffolk
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Suffolk
County context
9
Superfund sites in Suffolk
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Suffolk
Industrial polluters nearby
Facilities reporting the most surface-water releases in Suffolk, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
SAFETY-KLEEN SYSTEMS AMITYVILLE (ANY) AMITYVILLE, NY11701 | — | — |
MAGELLAN AEROSPACE PROCESSING LONG ISLAND INC. WEST BABYLON, NY11704 | — | — |
AMERICAN ACRYLIC CORP WEST BABYLON, NY11704 | — | — |
ASTRO ELECTROPLATING,INC. BAY SHORE, NY11706 | — | — |
NHS U.S. LLC BAYPORT, NY11705 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Suffolk
Superfund sites nearby
Federally tracked hazardous-waste sites within Suffolk on the EPA National Priorities List.
- BROOKHAVEN NATIONAL LABORATORY USDOE
- CIRCUITRON CORP
- COMPUTER CIRCUITS
- GOLDISC RECORDINGS INC
- ISLIP MUNICIPAL SANITARY LANDFILL
+ 4 more sites
Source: EPA Superfund National Priorities List
Full Rankings
All 11 cities in Suffolk
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Southampton (V) | A | 91.4 | 2K | 3 | Health Unresolved | |
| 2 | Smithtown (T) | A- | 85.1 | 1.1M | 13 | Health PFAS Unresolved | |
| 3 | Smithtown (T) | B+ | 84.8 | 1.1M | 18 | Health PFAS Unresolved | |
| 4 | Smithtown (T) | B+ | 80.8 | 1.1M | 57 | Health PFAS Unresolved | |
| 5 | Smithtown (T) | B | 78.8 | 1.1M | 48 | Health PFAS Unresolved | |
| 6 | Smithtown (T) | B- | 74.8 | 1.1M | 80 | Health PFAS Unresolved | |
| 7 | Smithtown (T) | B- | 71.8 | 1.1M | 117 | Health PFAS Unresolved | |
| 8 | Smithtown (T) | C+ | 67.5 | 1.1M | 102 | Health PFAS Unresolved | |
| 9 | Smithtown (T) | C | 60.9 | 1.1M | 95 | Health PFAS Unresolved | |
| 10 | Shelter Island (T) | C- | 59.1 | 577 | 200 | Health Unresolved | |
| 11 | Smithtown (T) | D | 48.4 | 1.3M | 136 | Health PFAS Unresolved |