St. Tammany Parish Water Quality Report
1 cities ranked · Average grade: F · Missouri
Avg Score
36.6
Cities Ranked
1
Health Violations
1
PFAS Detected
1
36.6
County avg score
1
Cities ranked
0%
A or B grade
100%
D or F grade
1
Health violations
1
PFAS detected
Grade Distribution
How St. Tammany Parish cities scored
A
0
0%
Excellent
B
0
0%
Good
C
0
0%
Fair
D
0
0%
Poor
F
1
100%
Failing
Comparison
County vs Missouri average
▼ 42.1 pts below state average
City Map
Water quality across St. Tammany Parish
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in St. Tammany Parish
Best cities
Worst cities
County context
2
Superfund sites in St. Tammany Parish
60.9%
of residents on fluoridated water (CDC, 2020)
59,430
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in St. Tammany Parish
Industrial polluters nearby
Facilities reporting the most surface-water releases in St. Tammany Parish, 2023.
Total reported releases to surface water: 59,430 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
BAYER CROPSCIENCE LP - KC KANSAS CITY, MO64120 | n-Butyl alcohol | 58,759 |
US ARMY LAKE CITY ARMY AMMUNITION PLANT INDEPENDENCE, MO64056 | Zinc compounds | 662 |
HAWTHORN GENERATING STATION KANSAS CITY, MO64120 | Barium And Barium Compounds | 9 |
MEYER LABORATORY INC. BLUE SPRINGS, MO64015 | — | — |
ALSTOM SIGNALING LLC GRAIN VALLEY, MO64029 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in St. Tammany Parish
Superfund sites nearby
Federally tracked hazardous-waste sites within St. Tammany Parish on the EPA National Priorities List.
- CONSERVATION CHEMICAL CO
- LAKE CITY ARMY AMMUNITION PLANT NORTHWEST LAGOON
Source: EPA Superfund National Priorities List
Full Rankings
All 1 cities in St. Tammany Parish
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Des Peres | F | 36.6 | 126K | 14564 | Health Unresolved |