What was found in ZIP 77418
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 559 µg/L 14% of the EPA limit 4000 µg/L Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2018 | 1/1 | SYR4 |
| Copper | 252 µg/L 19% of the EPA limit 1300 µg/L Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2017 | 1/1 | SYR4 |
| Barium | 212.85 µg/L 11% of the EPA limit 2000 µg/L Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2018 | 1/1 | SYR4 |
| Lithium | 47.8 µg/L No EPA limit set Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2023 | 1/1 | UCMR-5 |
| Nitrate | 20 µg/L 0.2% of the EPA limit 10000 µg/L Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 19.5 µg/L 0.2% of the EPA limit 10000 µg/L Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2019 | 1/1 | SYR4 |
| TTHM | 18.41 µg/L 23% of the EPA limit 80 µg/L Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2019 | 1/1 | SYR4 |
| Bromoform | 8.559999999999999 µg/L No EPA limit set Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 6.425 µg/L 11% of the EPA limit 60 µg/L Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2019 | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 6.16 pCi/L 41% of the EPA limit 15 pCi/L Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2018 | 1/1 | SYR4 |
| Dibromochloromethane | 4.379999999999999 µg/L No EPA limit set Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2019 | 1/1 | SYR4 |
| Gross Beta Particle Activity | 4.2 pCi/L No EPA limit set Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2018 | 1/1 | SYR4 |
| Selenium | 3.8 µg/L 7.6% of the EPA limit 50 µg/L Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2018 | 1/1 | SYR4 |
| Dichloroacetic Acid | 3.26 µg/L No EPA limit set Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2019 | 1/1 | SYR4 |
| Chloroform | 3.25 µg/L No EPA limit set Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 3.1929999999999996 pCi/L 64% of the EPA limit 5 pCi/L Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2018 | 1/1 | SYR4 |
| Bromodichloromethane | 2.375 µg/L No EPA limit set Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 2.2 µg/L No EPA limit set Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 2.075 µg/L No EPA limit set Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2019 | 1/1 | SYR4 |
| Lead | 1.79 µg/L 12% of the EPA limit 15 µg/L Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2017 | 1/1 | SYR4 |
| Toluene | 1 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: AUSTIN COUNTY WSC 4 · 681 people · 2024 | 1/1 | 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.
Water suppliers serving ZIP 77418
| Supplier | State | Population served |
|---|---|---|
| AUSTIN COUNTY WSC 4 | TX | 681 |
Frequently asked questions about ZIP 77418 tap water
Is the tap water in ZIP 77418 safe to drink?
EPA testing detected 22 contaminants across the water suppliers serving ZIP 77418. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 77418?
1 public water supplier report EPA drinking-water monitoring for ZIP 77418. Each is listed above with its population served.
What contaminants are in ZIP 77418's water?
EPA monitoring detected Fluoride, Copper, Barium, Lithium, Nitrate, and others across this ZIP's suppliers. The full list with levels and sources is above.