Cowlitz Water Quality Report
5 cities ranked · Average grade: C · Washington
Avg Score
64.9
Cities Ranked
5
Health Violations
3
PFAS Detected
1
64.9
County avg score
5
Cities ranked
40%
A or B grade
40%
D or F grade
3
Health violations
1
PFAS detected
Grade Distribution
How Cowlitz cities scored
A
1
20%
Excellent
B
1
20%
Good
C
1
20%
Fair
D
0
0%
Poor
F
2
40%
Failing
Comparison
County vs Washington average
▼ 5.2 pts below state average
City Map
Water quality across Cowlitz
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Cowlitz
Best cities
Worst cities
County context
186,137
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Cowlitz
Industrial polluters nearby
Facilities reporting the most surface-water releases in Cowlitz, 2023.
Total reported releases to surface water: 186,137 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
NIPPON DYNAWAVE PACKAGING CO. LONGVIEW, WA98632 | Manganese And Manganese Compounds | 116,866 |
WESTROCK LONGVIEW LLC LONGVIEW, WA98632 | Manganese compounds | 69,122 |
SOLVAY CHEMICALS INC LONGVIEW, WA98632 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 77 |
LANXESS CORP KALAMA SITE KALAMA, WA98625 | Toluene | 71 |
INTERFOR LONGVIEW DIV LONGVIEW, WA98632 | Lead And Lead Compounds | 0 |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 5 cities in Cowlitz
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Castle Rock | A- | 88.2 | 4K | 51 | Health Unresolved | |
| 2 | Longview | B+ | 82 | 49K | 15 | Unresolved | |
| 3 | Kalama | C+ | 68.2 | 8K | 51 | Unresolved | |
| 4 | Kelso | F | 43.5 | 31K | 794 | Health Unresolved | |
| 5 | Woodland | F | 42.5 | 13K | 2789 | Health Unresolved |