Snohomish Water Quality Report
17 cities ranked · Average grade: C+ · Washington
Avg Score
65.9
Cities Ranked
17
Health Violations
12
PFAS Detected
2
65.9
County avg score
17
Cities ranked
47%
A or B grade
41%
D or F grade
12
Health violations
2
PFAS detected
Grade Distribution
How Snohomish cities scored
A
5
29%
Excellent
B
3
18%
Good
C
2
12%
Fair
D
5
29%
Poor
F
2
12%
Failing
Comparison
County vs Washington average
▼ 4.2 pts below state average
City Map
Water quality across Snohomish
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Snohomish
Worst cities
County context
13
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Snohomish
Industrial polluters nearby
Facilities reporting the most surface-water releases in Snohomish, 2023.
Total reported releases to surface water: 13 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
BOEING COMMERCIAL AIRPLANES - EVERETT EVERETT, WA98204 | Copper | 13 |
ROMAC INDUSTRIES INC BOTHELL, WA98021 | — | — |
CEPHEID - BOTHELL BOTHELL, WA98021 | — | — |
TR INTERNATIONAL TRADING CO DBA CATALYNT SOLUTIONS EDMONDS, WA98020 | — | — |
ELDEC AEROSPACE CORP LYNNWOOD, WA98037 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 17 cities in Snohomish
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Startup | A | 91.4 | 643 | 20 | Health Unresolved | |
| 2 | Goldbar | A | 90.3 | 3K | 25 | Health Unresolved | |
| 3 | Edmonds | A- | 88.4 | 50K | 13 | Unresolved | |
| 4 | Granite Falls | A- | 87.3 | 7K | 8 | Unresolved | |
| 5 | Mukilteo | A- | 86.9 | 25K | 5 | Unresolved | |
| 6 | Mountlake Terrace | B+ | 82.4 | 26K | 12 | Unresolved | |
| 7 | Sultan | B | 79.7 | 7K | 119 | Health Unresolved | |
| 8 | Lynnwood | B- | 74.8 | 268K | 14 | Lead Unresolved | |
| 9 | Lake Stevens | C | 62.9 | 558 | 184 | Health Unresolved | |
| 10 | Monroe | C | 60.4 | 27K | 238 | Health Unresolved | |
| 11 | Stanwood | D | 48.2 | 22K | 481 | Health Unresolved | |
| 12 | Marysville | D | 46.2 | 98K | 1045 | Health Unresolved | |
| 13 | Snohomish | D | 46.2 | 41K | 415 | Health Unresolved | |
| 14 | Darrington | D | 46 | 2K | 256 | Health Unresolved | |
| 15 | Everett | D | 45.4 | 282K | 229 | Health Unresolved | |
| 16 | Arlington | F | 42 | 25K | 1630 | Health Unresolved | |
| 17 | Bothell | F | 41.6 | 91K | 293 | Health Unresolved |