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.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 1750 µg/L 18% of the EPA limit 10000 µg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019
Highest in the city: 1914.5 µg/L — CITY OF GONZALES · 9,172 people · 2019 | 2/2 | SYR4 |
| Fluoride | 220 µg/L 5.5% of the EPA limit 4000 µg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019
Highest in the city: 1266.5 µg/L — CITY OF GONZALES · 9,172 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 976 µg/L 9.8% of the EPA limit 10000 µg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2015 | 1/2 | SYR4 |
| Barium | 257.5 µg/L 13% of the EPA limit 2000 µg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019 | 2/2 | SYR4 |
| Copper | 240 µg/L 18% of the EPA limit 1300 µg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2018 | 2/2 | SYR4 |
| Chloroform | 179.65 µg/L No EPA limit set Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019 | 2/2 | SYR4 |
| Cyanide | 67.5 µg/L 34% of the EPA limit 200 µg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019
Highest in the city: 110 µg/L — CITY OF GONZALES · 9,172 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 102.56 µg/L 171% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019 | 2/2 | SYR4 |
| TTHM | 45.305 µg/L 57% of the EPA limit 80 µg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019
Highest in the city: 98.12 µg/L — CITY OF GONZALES · 9,172 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 87.385 µg/L No EPA limit set Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 59.35 µg/L No EPA limit set Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019 | 2/2 | SYR4 |
| Lithium | 50.7 µg/L No EPA limit set Main supplier: GONZALES COUNTY WSC · 10,350 people · 2023 | 2/2 | UCMR-5 |
| Bromodichloromethane | 42 µg/L No EPA limit set Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 16.1 µg/L No EPA limit set Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019
Highest in the city: 20.41 µg/L — CITY OF GONZALES · 9,172 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 13.065 pCi/L No EPA limit set Main supplier: GONZALES COUNTY WSC · 10,350 people · 2018 | 1/2 | SYR4 |
| Lead | 12.655 µg/L 84% of the EPA limit 15 µg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2018 | 2/2 | SYR4 |
| Monochloroacetic Acid | 10.535 µg/L No EPA limit set Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019 | 2/2 | SYR4 |
| Bromoform | 3.78 µg/L No EPA limit set Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019
Highest in the city: 10.08 µg/L — CITY OF GONZALES · 9,172 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 4.58 µg/L No EPA limit set Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019
Highest in the city: 8.55 µg/L — CITY OF GONZALES · 9,172 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.015 pCi/L 33% of the EPA limit 15 pCi/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2018 | 1/2 | SYR4 |
| Selenium | 3.49 µg/L 7% of the EPA limit 50 µg/L Highest in the city: CITY OF GONZALES · 9,172 people · 2019 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 3.35 pCi/L 67% of the EPA limit 5 pCi/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2018 | 2/2 | SYR4 |
| Dalapon | 3.32 µg/L 1.7% of the EPA limit 200 µg/L Highest in the city: CITY OF GONZALES · 9,172 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 2.615 µg/L No EPA limit set Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019 | 2/2 | SYR4 |
| Arsenic | 2.4 µg/L 24% of the EPA limit 10 µg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019 | 1/2 | SYR4 |
| Xylenes, Total | 1.009 µg/L 0% of the EPA limit 10000 µg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019 | 2/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.9300 µg/L 16% of the EPA limit 6 µg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019 | 1/2 | SYR4 |
| 6:2 Fts | 0.5970 µg/L No EPA limit set Highest in the city: CITY OF GONZALES · 9,172 people · 2023 | 1/2 | UCMR-5 |
| Hexachlorocyclopentadiene | 0.2300 µg/L 0.5% of the EPA limit 50 µg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019 | 1/2 | SYR4 |
| Atrazine | 0.1400 µg/L 4.7% of the EPA limit 3 µg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2019 | 2/2 | SYR4 |
| Pfpea | 0.0041 µg/L No EPA limit set Main supplier: GONZALES COUNTY WSC · 10,350 people · 2024
Highest in the city: 0.0089 µg/L — CITY OF GONZALES · 9,172 people · 2023 | 2/2 | UCMR-5 |
| Pfba | 0.0061 µg/L No EPA limit set Main supplier: GONZALES COUNTY WSC · 10,350 people · 2024 | 1/2 | UCMR-5 |
| Pfhxa | 0.0052 µg/L No EPA limit set Highest in the city: CITY OF GONZALES · 9,172 people · 2023 | 1/2 | UCMR-5 |
| PFBS | 0.0043 µg/L No EPA limit set Highest in the city: CITY OF GONZALES · 9,172 people · 2023 | 1/2 | UCMR-5 |
| Adona | 0.0032 µg/L No EPA limit set Highest in the city: CITY OF GONZALES · 9,172 people · 2023 | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: GONZALES COUNTY WSC · 10,350 people · 2024 | 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
| Supplier | Population served |
|---|---|
| GONZALES COUNTY WSC | 10,350 |
| CITY OF GONZALES | 9,172 |
Frequently asked questions about Gonzales tap water
Is Gonzales tap water safe to drink?
EPA testing detected 36 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, Texas 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 Nitrate, Fluoride, Nitrate-Nitrite, Barium, Copper. 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.