Nassau Water Quality Report
25 cities ranked · Average grade: A- · New York
Avg Score
85.8
Cities Ranked
25
Health Violations
21
PFAS Detected
14
85.8
County avg score
25
Cities ranked
92%
A or B grade
8%
D or F grade
21
Health violations
14
PFAS detected
Grade Distribution
How Nassau cities scored
A
20
80%
Excellent
B
3
12%
Good
C
0
0%
Fair
D
1
4%
Poor
F
1
4%
Failing
Comparison
County vs New York average
▲ 5.1 pts above state average
City Map
Water quality across Nassau
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Nassau
County context
14
Superfund sites in Nassau
42
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Nassau
Industrial polluters nearby
Facilities reporting the most surface-water releases in Nassau, 2023.
Total reported releases to surface water: 42 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
SPRAGUE LAWRENCE TERMINAL LAWRENCE, NY11559 | Naphthalene | 42 |
GLOBAL COS LLC GLENWOOD LANDING TERMINAL GLENWOOD LANDING, NY11547 | — | — |
NATIONAL GRID E.F. BARRETT POWER STATION ISLAND PARK, NY11558 | — | — |
SHELL LONG ISLAND TERMINAL LAWRENCE, NY11559 | — | — |
LND INC OCEANSIDE, NY11572 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Nassau
Superfund sites nearby
Federally tracked hazardous-waste sites within Nassau on the EPA National Priorities List.
- APPLIED ENVIRONMENTAL SERVICES
- CLAREMONT POLYCHEMICAL
- FULTON AVENUE
- GENZALE PLATING CO
- HOOKER CHEMICAL PLASTICS CORP RUCO POLYMER CORP
+ 9 more sites
Source: EPA Superfund National Priorities List
Full Rankings
All 25 cities in Nassau
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Freeport (V) | A+ | 99 | 45K | 2 | Health | |
| 2 | Sea Cliff (V) | A+ | 97.1 | 13K | 3 | ||
| 3 | North Hempstead (T) | A+ | 97 | 3K | 0 | Zero violations | |
| 4 | Bayville (V) | A | 94.6 | 7K | 31 | Health Unresolved | |
| 5 | Farmingdale (V) | A | 94.5 | 9K | 3 | Health Unresolved | |
| 6 | Oyster Bay (T) | A | 94.3 | 43K | 87 | Unresolved | |
| 7 | Long Beach (C) | A | 94.2 | 35K | 7 | Health Unresolved | |
| 8 | Rockville Center (V) | A | 92.2 | 25K | 89 | Health Unresolved | |
| 9 | Roslyn (V) | A | 91 | 17K | 56 | Health PFAS Unresolved | |
| 10 | Oyster Bay (T) | A | 90.8 | 8K | 7 | Health | |
| 11 | Plandome (V) | A | 90.8 | 2K | 9 | Health Unresolved | |
| 12 | New Hyde Park (V) | A | 90.3 | 18K | 6 | Health PFAS | |
| 13 | Mineola (V) | A- | 89.8 | 21K | 37 | Health PFAS Unresolved | |
| 14 | Hempstead (V) | A- | 89.7 | 56K | 64 | Health PFAS Unresolved | |
| 15 | Westbury (V) | A- | 88.7 | 21K | 8 | Health PFAS Unresolved | |
| 16 | East Williston (V) | A- | 86.6 | 3K | 3 | Unresolved | |
| 17 | Old Westbury (V) | A- | 86.1 | 5K | 4 | Health Unresolved | |
| 18 | Williston Park (V) | A- | 85.9 | 7K | 4 | Health PFAS Unresolved | |
| 19 | Hempstead (T) | A- | 85.8 | 20K | 33 | Health | |
| 20 | Garden City (V) | A- | 85 | 23K | 27 | Health PFAS Unresolved | |
| 21 | Glen Cove (C) | B+ | 83.9 | 28K | 159 | Health PFAS Unresolved | |
| 22 | Hempstead (T) | B | 78.6 | 220K | 4 | Health PFAS Unresolved | |
| 23 | Oyster Bay (T) | B- | 71 | 278K | 258 | Health Unresolved | |
| 24 | Hempstead (T) | D | 47.7 | 641K | 255 | Health PFAS Unresolved | |
| 25 | Hempstead (T) | F | 39.8 | 274K | 918 | Health PFAS Unresolved |