What was found in ZIP 78739
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 | 820 µg/L 21% of the EPA limit 4000 µg/L Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 2/2 | SYR4 |
| 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: 756 µg/L — TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 695.5 µg/L 7% of the EPA limit 10000 µg/L Highest in the ZIP: TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019 | 1/2 | 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: 413.5 µg/L — TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019 | 2/2 | 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 | 1/2 | SYR4 |
| 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 | 2/2 | 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: 43.2 µg/L — TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019 | 2/2 | SYR4 |
| Chloroform | 30.285 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 1/2 | 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: 22.7 µg/L — TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 18.885 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 15.41 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 12.985 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 1/2 | 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 | 2/2 | SYR4 |
| Trichloroacetic Acid | 7.07 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 1/2 | 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 | 2/2 | SYR4 |
| Dibromoacetic Acid | 4.1 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 1/2 | 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 | 1/2 | SYR4 |
| Monochloroacetic Acid | 3.525 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 1/2 | SYR4 |
| Bromoform | 3.355 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 1/2 | 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: 2.864 µg/L — TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 1.43 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019 | 1/2 | 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 | 1/2 | SYR4 |
| Combined Uranium | 0.0880 µg/L 0.3% of the EPA limit 30 µg/L Highest in the ZIP: TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2018 | 1/2 | 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 | 1/2 | SYR4 |
| Pfba | 0.0084 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024 | 1/2 | UCMR-5 |
| PFHXS | 0.0062 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024 | 1/2 | UCMR-5 |
| PFBS | 0.0051 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024 | 1/2 | UCMR-5 |
| PFOS | 0.0048 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024 | 1/2 | 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: 0.0045 mg/L — TUALATIN VALLEY WATER DISTRICT · 224,600 people · 2025 | 2/2 | LCR |
| Pfpea | 0.0041 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024 | 1/2 | UCMR-5 |
| Pfhxa | 0.0033 µg/L No EPA limit set Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024 | 1/2 | 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 78739
| Supplier | State | Population served |
|---|---|---|
| CITY OF AUSTIN WATER & WASTEWATER | TX | 1,115,323 |
| TUALATIN VALLEY WATER DISTRICT | OR | 224,600 |
Frequently asked questions about ZIP 78739 tap water
Is the tap water in ZIP 78739 safe to drink?
EPA testing detected 31 contaminants across the water suppliers serving ZIP 78739. 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 78739?
2 public water suppliers report EPA drinking-water monitoring for ZIP 78739. Each is listed above with its population served.
What contaminants are in ZIP 78739's water?
EPA monitoring detected Fluoride, Nitrate, Nitrate-Nitrite, Copper, Cyanide, and others across this ZIP's suppliers. The full list with levels and sources is above.