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Tap water quality report

ZIP 78738 — Austin, TX

EPA monitoring across the 2 water suppliers serving ZIP 78738 in Austin, TX detected 30 contaminants. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier below, with the EPA limit for each.

2
water suppliers
80,829
people served
30
contaminants found

What was found in ZIP 78738

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.

ContaminantLevel vs EPA limitSuppliersSource
Copper
567.45 µg/L 44%
of the EPA limit 1300 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 1400 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
Fluoride
689 µg/L 17%
of the EPA limit 4000 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
2/2 SYR4
Nitrate
520 µg/L 5.2%
of the EPA limit 10000 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 610 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
Chlorite
394 µg/L 39%
of the EPA limit 1000 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2014
1/2 SYR4
Cyanide
119 µg/L 60%
of the EPA limit 200 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
2/2 SYR4
Barium
65.4 µg/L 3.3%
of the EPA limit 2000 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 65.74 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
TTHM
45.82 µg/L 57%
of the EPA limit 80 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 63.765 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
21.82 µg/L 36%
of the EPA limit 60 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 33.035 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
Chloroform
21.24 µg/L
No EPA limit set
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 26.185 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
Bromodichloromethane
17.4 µg/L
No EPA limit set
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 23.245 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
Dibromochloromethane
15.015 µg/L
No EPA limit set
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 18.97 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
Dichloroacetic Acid
13.07 µg/L
No EPA limit set
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 16.785 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
Trichloroacetic Acid
5.9 µg/L
No EPA limit set
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 11.185 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
Dibromoacetic Acid
5.61 µg/L
No EPA limit set
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 6.89 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
Monochloroacetic Acid
5.15 µg/L
No EPA limit set
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 6.01 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
Lead
4.079 µg/L 27%
of the EPA limit 15 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 5.4 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
Bromoform
5.11 µg/L
No EPA limit set
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
2/2 SYR4
Gross Beta Particle Activity
4.955 pCi/L
No EPA limit set
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
2/2 SYR4
Selenium
3 µg/L 6%
of the EPA limit 50 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 3.52 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
Monobromoacetic Acid
2.6 µg/L
No EPA limit set
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
2/2 SYR4
Arsenic
2.48 µg/L 25%
of the EPA limit 10 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
2/2 SYR4
Combined Radium (-226 And -228)
1.5 pCi/L 30%
of the EPA limit 5 pCi/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2017
1/2 SYR4
Combined Uranium
1.1 µg/L 3.7%
of the EPA limit 30 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
1/2 SYR4
Di(2-ethylhexyl) Phthalate
0.6380 µg/L 11%
of the EPA limit 6 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
Highest in the ZIP: 1.0735 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 SYR4
Chromium
1.01 µg/L 1%
of the EPA limit 100 µg/L
Highest in the ZIP: WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
1/2 SYR4
Thallium, Total
0.5380 µg/L 27%
of the EPA limit 2 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
1/2 SYR4
Bhc-Gamma
0.0800 µg/L 40%
of the EPA limit 0.2000 µg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
1/2 SYR4
Pfba
0.0065 µg/L
No EPA limit set
Highest in the ZIP: WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2024
1/2 UCMR-5
Pfpea
0.0032 µg/L
No EPA limit set
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2024
1/2 UCMR-5
Lead
0.0031 mg/L 21%
of the EPA limit 0.0150 mg/L
Main supplier: TRAVIS COUNTY WCID 17 · 45,165 people · 2023
2/2 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 78738

SupplierStatePopulation served
TRAVIS COUNTY WCID 17 TX 45,165
WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY TX 35,664

Frequently asked questions about ZIP 78738 tap water

Is the tap water in ZIP 78738 safe to drink?

EPA testing detected 30 contaminants across the water suppliers serving ZIP 78738. 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 78738?

2 public water suppliers report EPA drinking-water monitoring for ZIP 78738. Each is listed above with its population served.

What contaminants are in ZIP 78738's water?

EPA monitoring detected Copper, Fluoride, Nitrate, Chlorite, Cyanide, and others across this ZIP's suppliers. The full list with levels and sources is above.