Ascension Parish Water Quality Report
2 cities ranked · Average grade: B · Louisiana
Avg Score
75.5
Cities Ranked
2
Health Violations
2
PFAS Detected
2
75.5
County avg score
2
Cities ranked
50%
A or B grade
0%
D or F grade
2
Health violations
2
PFAS detected
Grade Distribution
How Ascension Parish cities scored
A
1
50%
Excellent
B
0
0%
Good
C
1
50%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Louisiana average
▲ 10.0 pts above state average
City Map
Water quality across Ascension Parish
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Ascension Parish
Best cities
Worst cities
County context
47.9%
of residents on fluoridated water (CDC, 2020)
3,179,592
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Ascension Parish
Industrial polluters nearby
Facilities reporting the most surface-water releases in Ascension Parish, 2023.
Total reported releases to surface water: 3,179,592 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
CF INDUSTRIES NITROGEN LLC DONALDSONVILLE, LA70346 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 1,514,677 |
BASF CORP GEISMAR, LA70734 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 1,113,061 |
PCS NITROGEN FERTILIZER LP GEISMAR, LA70734 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 469,382 |
SHELL CHEMICAL LP GEISMAR, LA70734 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 44,273 |
OCCIDENTAL CHEMICAL HOLDING CORP - GEISMAR PLANT GEISMAR, LA70734 | Methanol | 28,779 |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 2 cities in Ascension Parish
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Gonzales | A- | 87.7 | 17K | 30 | Health Unresolved | |
| 2 | Donaldsonville | C | 63.3 | 12K | 104 | Health PFAS Unresolved |