St. Mary Parish Water Quality Report
7 cities ranked · Average grade: B- · Louisiana
Avg Score
73.2
Cities Ranked
7
Health Violations
7
PFAS Detected
6
73.2
County avg score
7
Cities ranked
86%
A or B grade
14%
D or F grade
7
Health violations
6
PFAS detected
Grade Distribution
How St. Mary Parish cities scored
A
0
0%
Excellent
B
6
86%
Good
C
0
0%
Fair
D
1
14%
Poor
F
0
0%
Failing
Comparison
County vs Louisiana average
▲ 7.7 pts above state average
City Map
Water quality across St. Mary Parish
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in St. Mary Parish
Worst cities
County context
0.0%
of residents on fluoridated water (CDC, 2020)
551
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in St. Mary Parish
Industrial polluters nearby
Facilities reporting the most surface-water releases in St. Mary Parish, 2023.
Total reported releases to surface water: 551 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
CABOT CORP CANAL PLANT CENTERVILLE, LA70522 | Polycyclic aromatic compounds | 496 |
CAMERON INTERNATIONAL CORP BAYOU VISTA, LA70380 | Ethylene glycol | 53 |
BIRLA CARBON USA INC CENTERVILLE, LA70522 | Polycyclic aromatic compounds | 2 |
BAKER HUGHES OILFIELD OPERATIONS LLC MORGAN CITY, LA70380 | Lead compounds | 0 |
BOLLINGER MARINE FABRICATORS LLC AMELIA, LA70340 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 7 cities in St. Mary Parish
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Charenton | B+ | 82 | 10K | 17 | Health Unresolved | |
| 2 | Berwick | B+ | 80.2 | 6K | 20 | Health Unresolved | |
| 3 | Centerville | B | 79 | 8K | 14 | Health Unresolved | |
| 4 | Morgan City | B | 78.5 | 15K | 43 | Health Unresolved | |
| 5 | Amelia | B- | 73.2 | 3K | 18 | Health Unresolved | |
| 6 | Patterson | B- | 73 | 14K | 19 | Health Unresolved | |
| 7 | Franklin | D | 46.2 | 9K | 152 | Health Unresolved |