Mason Water Quality Report
5 cities ranked · Average grade: C · Washington
Avg Score
61.5
Cities Ranked
5
Health Violations
5
PFAS Detected
1
61.5
County avg score
5
Cities ranked
20%
A or B grade
40%
D or F grade
5
Health violations
1
PFAS detected
Grade Distribution
How Mason cities scored
A
1
20%
Excellent
B
0
0%
Good
C
2
40%
Fair
D
1
20%
Poor
F
1
20%
Failing
Comparison
County vs Washington average
▼ 8.6 pts below state average
City Map
Water quality across Mason
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Mason
Best cities
Worst cities
County context
6
Superfund sites in Mason
54,624
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Mason
Industrial polluters nearby
Facilities reporting the most surface-water releases in Mason, 2023.
Total reported releases to surface water: 54,624 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
WESTROCK TACOMA MILL TACOMA, WA98421 | Methanol | 52,824 |
PABCO ROOFING PRODUCTS TACOMA, WA98421 | Copper compounds | 1,151 |
SONOCO PRODUCTS CO SUMNER, WA98390 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 356 |
US OIL & REFINING CO TACOMA, WA98421 | Ammonia | 286 |
STELLA-JONES CORP TACOMA, WA98421 | Copper And Copper Compounds | 3 |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Mason
Superfund sites nearby
Federally tracked hazardous-waste sites within Mason on the EPA National Priorities List.
- AMERICAN LAKE GARDENS MCCHORD AFB
- COMMENCEMENT BAY NEAR SHORE TIDE FLATS
- COMMENCEMENT BAY SOUTH TACOMA CHANNEL
- FORT LEWIS LOGISTICS CENTER
- HIDDEN VALLEY LANDFILL THUN FIELD
+ 1 more site
Source: EPA Superfund National Priorities List
Full Rankings