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Gonzales, LA

EPA monitoring detected 21 contaminants across the 2 water suppliers serving Gonzales. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
16,875
people served
21
contaminants found
Louisiana rankings Lead in Louisiana PFAS in Louisiana

What was found in Gonzales's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
200 µg/L 15%
of the EPA limit 1300 µg/L
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2017
1/2 SYR4
Nitrate-Nitrite
200 µg/L 2%
of the EPA limit 10000 µg/L
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2019
1/2 SYR4
Fluoride
100 µg/L 2.5%
of the EPA limit 4000 µg/L
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2017
2/2 SYR4
Lead
36.5 µg/L 243%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2017
1/2 SYR4
Lithium
29.4 µg/L
No EPA limit set
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2024
1/2 UCMR-5
TTHM
15.14 µg/L 19%
of the EPA limit 80 µg/L
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2019
2/2 SYR4
Chloroform
10.96 µg/L
No EPA limit set
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2019
2/2 SYR4
Selenium
10 µg/L 20%
of the EPA limit 50 µg/L
Highest in the city: ST AMANT TRAILER PARK · 69 people · 2019
1/2 SYR4
Trichloroacetic Acid
6.08 µg/L
No EPA limit set
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2019
2/2 SYR4
Bromodichloromethane
5.2 µg/L
No EPA limit set
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2019
2/2 SYR4
Dichloroacetic Acid
3.8 µg/L
No EPA limit set
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
3.8 µg/L 6.3%
of the EPA limit 60 µg/L
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2019
2/2 SYR4
Monochloroacetic Acid
0.6100 µg/L
No EPA limit set
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2019
Highest in the city: 3.2 µg/L — ST AMANT TRAILER PARK · 69 people · 2019
2/2 SYR4
Gross Beta Particle Activity
3.093 pCi/L
No EPA limit set
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2017
2/2 SYR4
Dibromochloromethane
1.4 µg/L
No EPA limit set
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2019
Highest in the city: 2.1 µg/L — ST AMANT TRAILER PARK · 69 people · 2019
2/2 SYR4
Combined Radium (-226 And -228)
1.8805 pCi/L 38%
of the EPA limit 5 pCi/L
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2017
1/2 SYR4
Di(2-ethylhexyl) Phthalate
0.0760 µg/L 1.3%
of the EPA limit 6 µg/L
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2017
Highest in the city: 1.08 µg/L — ST AMANT TRAILER PARK · 69 people · 2019
2/2 SYR4
Pentachlorophenol
0.7540 µg/L 75%
of the EPA limit 1 µg/L
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2017
1/2 SYR4
Dibromoacetic Acid
0.5580 µg/L
No EPA limit set
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2019
1/2 SYR4
Bromoform
0.5400 µg/L
No EPA limit set
Highest in the city: ST AMANT TRAILER PARK · 69 people · 2019
1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: CITY OF GONZALES WATER SYSTEM · 16,806 people · 2023
2/2 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Gonzales

SupplierPopulation served
CITY OF GONZALES WATER SYSTEM 16,806
ST AMANT TRAILER PARK 69

Frequently asked questions about Gonzales tap water

Is Gonzales tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Gonzales. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Gonzales?

2 public water suppliers report drinking-water monitoring for Gonzales, Louisiana to the EPA. Each is listed above with its population served.

What contaminants are in Gonzales's water?

The contaminants EPA monitoring detected in Gonzales include Copper, Nitrate-Nitrite, Fluoride, Lead, Lithium. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.