What was found in Robstown'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 |
|---|---|---|---|
| Fluoride | 958.5 µg/L 24% of the EPA limit 4000 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 1/3 | SYR4 |
| Chlorite | 701.75 µg/L 70% of the EPA limit 1000 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 1/3 | SYR4 |
| Copper | 191.7 µg/L 15% of the EPA limit 1300 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019
Highest in the city: 584.2 µg/L — RIVER ACRES WSC · 2,700 people · 2019 | 3/3 | SYR4 |
| Nitrate | 380 µg/L 3.8% of the EPA limit 10000 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 1/3 | SYR4 |
| Barium | 170.2 µg/L 8.5% of the EPA limit 2000 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 1/3 | SYR4 |
| Cyanide | 114.5 µg/L 57% of the EPA limit 200 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 1/3 | SYR4 |
| TTHM | 109.8 µg/L 137% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 3/3 | SYR4 |
| Bromoform | 57.685 µg/L No EPA limit set Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019
Highest in the city: 63.6 µg/L — RIVER ACRES WSC · 2,700 people · 2019 | 3/3 | SYR4 |
| Lead | 12 µg/L 80% of the EPA limit 15 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019
Highest in the city: 57.68 µg/L — RIVER ACRES WSC · 2,700 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 44.17 µg/L 74% of the EPA limit 60 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 36.825 µg/L No EPA limit set Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 3/3 | SYR4 |
| Lithium | 34.7 µg/L No EPA limit set Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2023 | 1/3 | UCMR-5 |
| Dibromochloromethane | 31.65 µg/L No EPA limit set Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 11.98 µg/L No EPA limit set Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019
Highest in the city: 23.52 µg/L — VIOLET WSC · 2,670 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 16.8 µg/L No EPA limit set Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019
Highest in the city: 23.085 µg/L — VIOLET WSC · 2,670 people · 2019 | 3/3 | SYR4 |
| Nitrite | 20 µg/L 2% of the EPA limit 1000 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2013 | 1/3 | SYR4 |
| Chloroform | 8.46 µg/L No EPA limit set Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019
Highest in the city: 16.75 µg/L — VIOLET WSC · 2,670 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 14.375 µg/L No EPA limit set Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 12.3 pCi/L No EPA limit set Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2017 | 1/3 | SYR4 |
| Arsenic | 9.6 µg/L 96% of the EPA limit 10 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 1/3 | SYR4 |
| Selenium | 9.4 µg/L 19% of the EPA limit 50 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 1/3 | SYR4 |
| Trichloroacetic Acid | 2.6 µg/L No EPA limit set Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019
Highest in the city: 8.25 µg/L — VIOLET WSC · 2,670 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 6.9 µg/L No EPA limit set Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 3/3 | SYR4 |
| Combined Uranium | 2.9 µg/L 9.7% of the EPA limit 30 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2017 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.8500 µg/L 14% of the EPA limit 6 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 1/3 | SYR4 |
| Atrazine | 0.2425 µg/L 8.1% of the EPA limit 3 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 1/3 | SYR4 |
| Simazine | 0.1200 µg/L 3% of the EPA limit 4 µg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0120 µg/L No EPA limit set Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2023 | 1/3 | UCMR-5 |
| Lead | 0.0024 mg/L 16% of the EPA limit 0.0150 mg/L Main supplier: NUECES COUNTY WCID 3 · 14,000 people · 2025 | 3/3 | 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 Robstown
| Supplier | Population served |
|---|---|
| NUECES COUNTY WCID 3 | 14,000 |
| RIVER ACRES WSC | 2,700 |
| VIOLET WSC | 2,670 |
Frequently asked questions about Robstown tap water
Is Robstown tap water safe to drink?
EPA testing detected 29 contaminants in the water serving Robstown. 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 Robstown?
3 public water suppliers report drinking-water monitoring for Robstown, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Robstown's water?
The contaminants EPA monitoring detected in Robstown include Fluoride, Chlorite, Copper, Nitrate, Barium. 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.