What was found in ZIP 78746
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: 2562.5 µg/L — MANVILLE WSC · 39,648 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 2287 µg/L 23% of the EPA limit 10000 µg/L Highest in the ZIP: MANVILLE WSC · 39,648 people · 2015 | 1/3 | 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
Highest in the ZIP: 1625 µg/L — MANVILLE WSC · 39,648 people · 2019 | 3/3 | SYR4 |
| Copper | 9.6 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: 1400 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019 | 3/3 | SYR4 |
| Nitrite | 185 µg/L 19% of the EPA limit 1000 µg/L Highest in the ZIP: MANVILLE WSC · 39,648 people · 2015 | 1/3 | SYR4 |
| Xylenes, Total | 142.25 µg/L 1.4% of the EPA limit 10000 µg/L Highest in the ZIP: MANVILLE WSC · 39,648 people · 2019 | 1/3 | 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: 142 µg/L — MANVILLE WSC · 39,648 people · 2019 | 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 | 3/3 | SYR4 |
| Lithium | 83.8 µg/L No EPA limit set Highest in the ZIP: MANVILLE WSC · 39,648 people · 2023 | 1/3 | UCMR-5 |
| TTHM | 59.045 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: 64.85 µg/L — MANVILLE WSC · 39,648 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 23.91 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: 33.035 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019 | 3/3 | 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 |
| Ethylbenzene | 28.25 µg/L 4% of the EPA limit 700 µg/L Highest in the ZIP: MANVILLE WSC · 39,648 people · 2019 | 1/3 | SYR4 |
| Bromodichloromethane | 18.885 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 24.02 µg/L — MANVILLE WSC · 39,648 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: 22.16 µg/L — MANVILLE WSC · 39,648 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 15.41 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 16.785 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 7.07 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 11.185 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019 | 3/3 | SYR4 |
| Bromoform | 3.355 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the ZIP: 9.495 µg/L — MANVILLE WSC · 39,648 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: 6.89 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019 | 3/3 | SYR4 |
| Selenium | 6.525 µg/L 13% of the EPA limit 50 µg/L Highest in the ZIP: MANVILLE WSC · 39,648 people · 2019 | 2/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 6.36 pCi/L 42% of the EPA limit 15 pCi/L Highest in the ZIP: MANVILLE WSC · 39,648 people · 2019 | 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: 6.01 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019 | 3/3 | 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
Highest in the ZIP: 5.4 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 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 | 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: 4.0695 µg/L — MANVILLE WSC · 39,648 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 |
| 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: 2.665 µg/L — MANVILLE WSC · 39,648 people · 2019 | 3/3 | SYR4 |
| Combined Uranium | 2.3 µg/L 7.7% of the EPA limit 30 µg/L Highest in the ZIP: MANVILLE WSC · 39,648 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 2.108 pCi/L 42% of the EPA limit 5 pCi/L Highest in the ZIP: MANVILLE WSC · 39,648 people · 2017 | 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: 1.94 µg/L — MANVILLE WSC · 39,648 people · 2019 | 3/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.0735 µg/L 18% of the EPA limit 6 µg/L Highest in the ZIP: WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019 | 1/3 | SYR4 |
| Atrazine | 0.6525 µg/L 22% of the EPA limit 3 µg/L Highest in the ZIP: MANVILLE WSC · 39,648 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
Highest in the ZIP: 0.1480 µg/L — MANVILLE WSC · 39,648 people · 2019 | 2/3 | SYR4 |
| PFNA | 0.0243 µg/L No EPA limit set Highest in the ZIP: MANVILLE WSC · 39,648 people · 2023 | 1/3 | UCMR-5 |
| PFOS | 0.0048 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024
Highest in the ZIP: 0.0124 µg/L — MANVILLE WSC · 39,648 people · 2023 | 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: 0.0100 µg/L — MANVILLE WSC · 39,648 people · 2023 | 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: 0.0091 µg/L — MANVILLE WSC · 39,648 people · 2023 | 2/3 | 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: 0.0087 µg/L — MANVILLE WSC · 39,648 people · 2023 | 2/3 | UCMR-5 |
| Pfba | 0.0084 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024 | 3/3 | UCMR-5 |
| PFHXS | 0.0062 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024
Highest in the ZIP: 0.0070 µg/L — MANVILLE WSC · 39,648 people · 2023 | 2/3 | UCMR-5 |
| PFOA | 0.0059 µg/L No EPA limit set Highest in the ZIP: MANVILLE WSC · 39,648 people · 2023 | 1/3 | UCMR-5 |
| Pfhpa | 0.0043 µg/L No EPA limit set Highest in the ZIP: MANVILLE WSC · 39,648 people · 2023 | 1/3 | UCMR-5 |
| Pfuna | 0.0027 µg/L No EPA limit set Highest in the ZIP: MANVILLE WSC · 39,648 people · 2023 | 1/3 | 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: 0.0014 mg/L — MANVILLE WSC · 39,648 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 78746
| Supplier | State | Population served |
|---|---|---|
| CITY OF AUSTIN WATER & WASTEWATER | TX | 1,115,323 |
| MANVILLE WSC | TX | 39,648 |
| WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY | TX | 35,664 |
Frequently asked questions about ZIP 78746 tap water
Is the tap water in ZIP 78746 safe to drink?
EPA testing detected 44 contaminants across the water suppliers serving ZIP 78746. 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 78746?
3 public water suppliers report EPA drinking-water monitoring for ZIP 78746. Each is listed above with its population served.
What contaminants are in ZIP 78746's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Copper, Nitrite, and others across this ZIP's suppliers. The full list with levels and sources is above.