Jefferson Parish Water Quality Report
3 cities ranked · Average grade: B+ · Louisiana
Avg Score
82.2
Cities Ranked
3
Health Violations
3
PFAS Detected
3
82.2
County avg score
3
Cities ranked
100%
A or B grade
0%
D or F grade
3
Health violations
3
PFAS detected
Grade Distribution
How Jefferson Parish cities scored
A
2
67%
Excellent
B
1
33%
Good
C
0
0%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Louisiana average
▲ 16.7 pts above state average
City Map
Water quality across Jefferson Parish
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Jefferson Parish
Best cities
Worst cities
County context
98.1%
of residents on fluoridated water (CDC, 2020)
381,266
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Jefferson Parish
Industrial polluters nearby
Facilities reporting the most surface-water releases in Jefferson Parish, 2023.
Total reported releases to surface water: 381,266 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
CORNERSTONE CHEMICAL CO LLC WESTWEGO, LA70094 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 381,266 |
HOLCIM - SOR INC. - AIRLINE RMX METAIRIE, LA70001 | — | — |
BOLLINGER QUICK REPAIR LLC HARVEY, LA70058 | — | — |
FMT SHIPYARD & REPAIR LLC HARVEY, LA70058 | — | — |
JOHN W STONE OIL DISTRIBUTOR GRETNA, LA70053 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings