King Water Quality Report
33 cities ranked · Average grade: B- · Washington
Avg Score
73.4
Cities Ranked
33
Health Violations
29
PFAS Detected
7
73.4
County avg score
33
Cities ranked
67%
A or B grade
21%
D or F grade
29
Health violations
7
PFAS detected
Grade Distribution
How King cities scored
A
10
30%
Excellent
B
12
36%
Good
C
4
12%
Fair
D
4
12%
Poor
F
3
9%
Failing
Comparison
County vs Washington average
▲ 3.3 pts above state average
City Map
Water quality across King
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in King
Best cities
Worst cities
County context
10
Superfund sites in King
133
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in King
Industrial polluters nearby
Facilities reporting the most surface-water releases in King, 2023.
Total reported releases to surface water: 133 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
DAVIS WIRE CORP KENT, WA98032 | Lead compounds | 108 |
NUCOR STEEL SEATTLE INC SEATTLE, WA98106 | Zinc compounds | 11 |
ACE GALVANIZING INC SEATTLE, WA98108 | Zinc compounds | 5 |
BOEING COMMERCIAL AIRPLANE GROUP - RENTON RENTON, WA98055 | Copper | 3 |
BOEING COMMERCIAL AIRPLANES - AUBURN AUBURN, WA98001 | Copper | 2 |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in King
Superfund sites nearby
Federally tracked hazardous-waste sites within King on the EPA National Priorities List.
- HARBOR ISLAND LEAD
- LOCKHEED WEST SEATTLE
- LOWER DUWAMISH WATERWAY
- MIDWAY LANDFILL
- PACIFIC CAR FOUNDRY CO
+ 5 more sites
Source: EPA Superfund National Priorities List
Full Rankings
All 33 cities in King
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Tukwila | A | 94.2 | 45K | 0 | Zero violations | |
| 2 | Bellevue | A | 91.6 | 317K | 9 | Health Unresolved | |
| 3 | Newcastle | A | 90.8 | 16K | 10 | Health Unresolved | |
| 4 | Duvall | A- | 89 | 14K | 9 | Unresolved | |
| 5 | Des Moines | A- | 88.6 | 5K | 12 | Health Unresolved | |
| 6 | Snoqualime | A- | 88.5 | 16K | 24 | Health Unresolved | |
| 7 | Shoreline | A- | 87.7 | 32K | 6 | Unresolved | |
| 8 | Mercer Island | A- | 86.8 | 31K | 12 | Health Unresolved | |
| 9 | Woodinville | A- | 86.1 | 60K | 50 | Health Unresolved | |
| 10 | Snoqualmie | A- | 86 | 2K | 85 | Health Unresolved | |
| 11 | Snoqualmie Pass | B+ | 84.9 | 6K | 105 | Health Unresolved | |
| 12 | Algona | B+ | 84.7 | 3K | 11 | Health Unresolved | |
| 13 | Falls City | B+ | 84.3 | 2K | 35 | Health Unresolved | |
| 14 | Enumclaw | B+ | 83.9 | 23K | 66 | Health Unresolved | |
| 15 | North Bend | B+ | 83.8 | 14K | 98 | Health Unresolved | |
| 16 | Burien | B+ | 83.2 | 16K | 7 | Health Unresolved | |
| 17 | Vashion Island | B+ | 82.4 | 685 | 118 | Health Unresolved | |
| 18 | Federal Way | B | 77.3 | 118K | 51 | Health PFAS Unresolved | |
| 19 | Redmond | B- | 73.3 | 175K | 177 | Health PFAS Unresolved | |
| 20 | Ravensdale | B- | 72.6 | 557 | 257 | Health Unresolved | |
| 21 | Kenmore | B- | 72.2 | 105K | 5 | Lead Unresolved | |
| 22 | Fall City | B- | 70.1 | 3K | 257 | Health Unresolved | |
| 23 | Maple Valley | C+ | 67.7 | 29K | 226 | Health Unresolved | |
| 24 | Black Diamond | C- | 59.8 | 3K | 464 | Health Unresolved | |
| 25 | Issaquah | C- | 57.9 | 44K | 338 | Health Unresolved | |
| 26 | Sammamish | C- | 56 | 88K | 433 | Health PFAS Unresolved | |
| 27 | Renton | D+ | 54.1 | 193K | 207 | Health Unresolved | |
| 28 | Auburn | D+ | 52.5 | 117K | 264 | Health Unresolved | |
| 29 | Lake Forest Park | D+ | 52 | 4K | 1999 | Health Unresolved | |
| 30 | Kirkland | D+ | 50 | 67K | 260 | Health Unresolved | |
| 31 | Kent | F | 44.4 | 360K | 244 | Health PFAS Unresolved | |
| 32 | Seattle | F | 42.3 | 1.2M | 1889 | Health Unresolved | |
| 33 | Vashon | F | 42.3 | 9K | 350 | Health Unresolved |