What was found in ZIP 78717
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 | 560 µg/L 5.6% of the EPA limit 10000 µg/L Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 1020 µg/L — BRUSHY CREEK MUD · 18,314 people · 2019 | 2/3 | SYR4 |
| Fluoride | 820 µg/L 21% of the EPA limit 4000 µg/L Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 2/3 | SYR4 |
| Copper | 9.599999999999994 µg/L 0.7% of the EPA limit 1300 µg/L Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2018
Highest in the ZIP: 199.00000000000006 µg/L — BRUSHY CREEK MUD · 18,314 people · 2018 | 3/3 | SYR4 |
| Cyanide | 132.5 µg/L 66% of the EPA limit 200 µg/L Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 2/3 | SYR4 |
| TTHM | 59.04499999999999 µg/L 74% of the EPA limit 80 µg/L Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 59.53999999999999 µg/L — BRUSHY CREEK MUD · 18,314 people · 2019 | 3/3 | SYR4 |
| Barium | 11.91 µg/L 0.6% of the EPA limit 2000 µg/L Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 49.865 µg/L — BRUSHY CREEK MUD · 18,314 people · 2019 | 2/3 | SYR4 |
| Chloroform | 30.285 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 23.909999999999997 µg/L 40% of the EPA limit 60 µg/L Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 27.419999999999998 µg/L — BRUSHY CREEK MUD · 18,314 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 18.884999999999998 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 20.04 µg/L — BRUSHY CREEK MUD · 18,314 people · 2019 | 3/3 | SYR4 |
| Bromoform | 3.3549999999999995 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 17.324999999999996 µg/L — BRUSHY CREEK MUD · 18,314 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 12.985 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 16.939999999999998 µg/L — BRUSHY CREEK MUD · 18,314 people · 2019 | 3/3 | SYR4 |
| Lithium | 16.3 µg/L No EPA limit set Highest in the ZIP: BRUSHY CREEK MUD · 18,314 people · 2024 | 1/3 | UCMR-5 |
| Dichloroacetic Acid | 15.409999999999997 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 15.7 µg/L — BRUSHY CREEK MUD · 18,314 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 4.1 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 8.4 µg/L — BRUSHY CREEK MUD · 18,314 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 7.069999999999996 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 8.279999999999998 µg/L — BRUSHY CREEK MUD · 18,314 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 4.8 pCi/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2018 | 1/3 | SYR4 |
| Monochloroacetic Acid | 3.525 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 4.284999999999999 µg/L — BRUSHY CREEK MUD · 18,314 people · 2019 | 3/3 | SYR4 |
| Diquat | 4.03 µg/L 20% of the EPA limit 20 µg/L Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 1/3 | SYR4 |
| Lead | 3.923 µg/L 26% of the EPA limit 15 µg/L Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2018 | 3/3 | SYR4 |
| Selenium | 3.86 µg/L 7.7% of the EPA limit 50 µg/L Highest in the ZIP: BRUSHY CREEK MUD · 18,314 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.43 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 3.025 µg/L — BRUSHY CREEK MUD · 18,314 people · 2019 | 3/3 | SYR4 |
| Chromium | 0.4283 µg/L 0.4% of the EPA limit 100 µg/L Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 2.0336 µg/L — BRUSHY CREEK MUD · 18,314 people · 2019 | 2/3 | SYR4 |
| Arsenic | 0.9340 µg/L 9.3% of the EPA limit 10 µg/L Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 1.58 µg/L — BRUSHY CREEK MUD · 18,314 people · 2019 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.475 pCi/L 30% of the EPA limit 5 pCi/L Highest in the ZIP: BRUSHY CREEK MUD · 18,314 people · 2018 | 1/3 | SYR4 |
| Atrazine | 0.1300 µg/L 4.3% of the EPA limit 3 µg/L Highest in the ZIP: BRUSHY CREEK MUD · 18,314 people · 2019 | 1/3 | SYR4 |
| Simazine | 0.0800 µg/L 2% of the EPA limit 4 µg/L Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0084 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024 | 2/3 | UCMR-5 |
| PFHXS | 0.0062 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024 | 2/3 | UCMR-5 |
| Pfpea | 0.0041 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024
Highest in the ZIP: 0.0060 µg/L — BRUSHY CREEK MUD · 18,314 people · 2024 | 2/3 | UCMR-5 |
| PFBS | 0.0051 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024
Highest in the ZIP: 0.0055 µg/L — BRUSHY CREEK MUD · 18,314 people · 2024 | 2/3 | UCMR-5 |
| PFOS | 0.0048 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024 | 1/3 | UCMR-5 |
| Pfhxa | 0.0033 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024
Highest in the ZIP: 0.0038 µg/L — BRUSHY CREEK MUD · 18,314 people · 2024 | 2/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024
Highest in the ZIP: 0.0013 mg/L — BRUSHY CREEK MUD · 18,314 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.
Water suppliers serving ZIP 78717
| Supplier | State | Population served |
|---|---|---|
| CITY OF AUSTIN WATER & WASTEWATER | TX | 1,115,323 |
| BRUSHY CREEK MUD | TX | 18,314 |
| NORTH AUSTIN MUD 1 | TX | 11,133 |
Frequently asked questions about ZIP 78717 tap water
Is the tap water in ZIP 78717 safe to drink?
EPA testing detected 33 contaminants across the water suppliers serving ZIP 78717. 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 78717?
3 public water suppliers report EPA drinking-water monitoring for ZIP 78717. Each is listed above with its population served.
What contaminants are in ZIP 78717's water?
EPA monitoring detected Nitrate, Fluoride, Copper, Cyanide, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.