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Tap water quality report

City of Gonzales

EPA monitoring tested this supplier for 108 contaminants and detected 29. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

108
contaminants tested
29
detected
9,172
people served
42
health-based violations
Texas rankingsLead in TexasPFAS in Texas
Water source
Surface water
Ownership
Local government
Counties served
Gonzales

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

42
health-based violations
72
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfpea 0.0089 µg/L 7/8 2023
Pfhxa 0.0052 µg/L 4/8 2023
PFBS 0.0043 µg/L 2/8 2023
6:2 Fts 0.5970 µg/L 1/8 2023
Adona 0.0032 µg/L 1/8 2023

Other contaminants detected

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Bromodichloromethane
84 µg/L
No EPA limit set
 65/71 SYR4 2012–2019
Chloroform
252 µg/L
No EPA limit set
 65/71 SYR4 2012–2019
Dibromochloromethane
43.9 µg/L
No EPA limit set
 64/71 SYR4 2012–2019
Bromoform
22.6 µg/L
No EPA limit set
 57/71 SYR4 2012–2019
TTHM
399 µg/L 499%
of the EPA limit, in the worst sample — 80 µg/L
 57/57 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
480 µg/L 800%
of the EPA limit, in the worst sample — 60 µg/L
 56/57 SYR4 2012–2019
Dichloroacetic Acid
207.6 µg/L
No EPA limit set
 55/57 SYR4 2012–2019
Dibromoacetic Acid
11.5 µg/L
No EPA limit set
 54/57 SYR4 2012–2019
Trichloroacetic Acid
248.7 µg/L
No EPA limit set
 49/57 SYR4 2012–2019
Copper
830 µg/L 64%
of the EPA limit 1300 µg/L
 43/66 SYR4 2013–2019
Nitrate
1940 µg/L 19%
of the EPA limit 10000 µg/L
 24/26 SYR4 2012–2019
Lead
6.5 µg/L 43%
of the EPA limit 15 µg/L
 21/66 SYR4 2013–2019
Lead
0.0075 mg/L 50%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2025
Fluoride
1280 µg/L 32%
of the EPA limit 4000 µg/L
 10/10 SYR4 2012–2019
Barium
64.6 µg/L 3.2%
of the EPA limit 2000 µg/L
 9/9 SYR4 2013–2019
Monochloroacetic Acid
12.5 µg/L
No EPA limit set
 9/57 SYR4 2012–2019
Monobromoacetic Acid
2.1 µg/L
No EPA limit set
 6/57 SYR4 2012–2019
Lithium
13.2 µg/L
No EPA limit set
 5/8 UCMR-5 2023
Cyanide
110 µg/L 55%
of the EPA limit 200 µg/L
 4/8 SYR4 2014–2019
Combined Radium (-226 And -228)
1.5 pCi/L 30%
of the EPA limit 5 pCi/L
 2/2 SYR4 2013–2019
Dalapon
3.4 µg/L 1.7%
of the EPA limit 200 µg/L
 2/60 SYR4 2013–2019
Selenium
3.5 µg/L 7%
of the EPA limit 50 µg/L
 2/9 SYR4 2013–2019
Atrazine
0.1000 µg/L 3.3%
of the EPA limit 3 µg/L
 1/12 SYR4 2012–2019
Xylenes, Total
0.5000 µg/L 0%
of the EPA limit 10000 µg/L
 1/14 SYR4 2012–2019
79 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts8:2 Fts9Cl-PF3ONSAntimony, TotalArsenicAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
ANZALDUA, ISAAC
Phone
830-263-0876
Email
ianzaldua@gonzales.texas.gov

Frequently asked questions about City of Gonzales

Is City of Gonzales tap water safe to drink?

EPA monitoring detected 29 contaminants in City of Gonzales's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in City of Gonzales's water?

EPA monitoring detected Bromodichloromethane, Chloroform, Dibromochloromethane, Bromoform, TTHM, and others. The full list with the level and data source for each is above.

How many people does City of Gonzales serve?

City of Gonzales reports serving 9,172 people in Texas, per its EPA record.

Has City of Gonzales had any water quality violations?

The EPA has 72 violations on file for City of Gonzales, of which 42 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.