What was found in ZIP 78682
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 |
|---|---|---|---|
| Nitrate | 5790 µg/L 58% of the EPA limit 10000 µg/L Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 5730 µg/L 57% of the EPA limit 10000 µg/L Main supplier: CITY OF ROUND ROCK · 130,662 people · 2015 | 1/1 | SYR4 |
| Copper | 400 µg/L 31% of the EPA limit 1300 µg/L Main supplier: CITY OF ROUND ROCK · 130,662 people · 2018 | 1/1 | SYR4 |
| Fluoride | 315 µg/L 7.9% of the EPA limit 4000 µg/L Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Cyanide | 115 µg/L 57% of the EPA limit 200 µg/L Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| TTHM | 64.13999999999999 µg/L 80% of the EPA limit 80 µg/L Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Barium | 53.5 µg/L 2.7% of the EPA limit 2000 µg/L Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 25.639999999999986 µg/L 43% of the EPA limit 60 µg/L Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 24.009999999999998 µg/L No EPA limit set Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 23.4 µg/L No EPA limit set Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Chloroform | 19.889999999999997 µg/L No EPA limit set Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Bromoform | 17.544999999999995 µg/L No EPA limit set Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Lithium | 13.5 µg/L No EPA limit set Main supplier: CITY OF ROUND ROCK · 130,662 people · 2025 | 1/1 | UCMR-5 |
| Dichloroacetic Acid | 13 µg/L No EPA limit set Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 9.42 µg/L No EPA limit set Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 8.344999999999999 µg/L No EPA limit set Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Lead | 7.909999999999989 µg/L 53% of the EPA limit 15 µg/L Main supplier: CITY OF ROUND ROCK · 130,662 people · 2018 | 1/1 | SYR4 |
| Monochloroacetic Acid | 5.319999999999999 µg/L No EPA limit set Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Selenium | 4.38 µg/L 8.8% of the EPA limit 50 µg/L Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 2 µg/L No EPA limit set Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Arsenic | 1.68 µg/L 17% of the EPA limit 10 µg/L Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| Atrazine | 0.1795 µg/L 6% of the EPA limit 3 µg/L Main supplier: CITY OF ROUND ROCK · 130,662 people · 2019 | 1/1 | SYR4 |
| PFBS | 0.0067 µg/L No EPA limit set Main supplier: CITY OF ROUND ROCK · 130,662 people · 2025 | 1/1 | UCMR-5 |
| Pfpea | 0.0067 µg/L No EPA limit set Main supplier: CITY OF ROUND ROCK · 130,662 people · 2025 | 1/1 | UCMR-5 |
| Pfba | 0.0051 µg/L No EPA limit set Main supplier: CITY OF ROUND ROCK · 130,662 people · 2025 | 1/1 | UCMR-5 |
| Lead | 0.0050 mg/L 34% of the EPA limit 0.0150 mg/L Main supplier: CITY OF ROUND ROCK · 130,662 people · 2023 | 1/1 | LCR |
| Pfhxa | 0.0037 µg/L No EPA limit set Main supplier: CITY OF ROUND ROCK · 130,662 people · 2025 | 1/1 | UCMR-5 |
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 78682
| Supplier | State | Population served |
|---|---|---|
| CITY OF ROUND ROCK | TX | 130,662 |
Frequently asked questions about ZIP 78682 tap water
Is the tap water in ZIP 78682 safe to drink?
EPA testing detected 27 contaminants across the water suppliers serving ZIP 78682. 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 78682?
1 public water supplier report EPA drinking-water monitoring for ZIP 78682. Each is listed above with its population served.
What contaminants are in ZIP 78682's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Copper, Fluoride, Cyanide, and others across this ZIP's suppliers. The full list with levels and sources is above.