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Tap water quality report

ZIP 78736 — Austin, TX

EPA monitoring across the 2 water suppliers serving ZIP 78736 in Austin, TX detected 31 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
1,150,987
people served
31
contaminants found

What was found in ZIP 78736

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
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
2/2 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
2/2 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: 610 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 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
2/2 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
Highest in the ZIP: 65.74 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 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
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)
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
2/2 SYR4
Chloroform
30.285 µg/L
No EPA limit set
Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 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
Highest in the ZIP: 23.245 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 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: 18.97 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 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
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
Highest in the ZIP: 11.185 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
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
Highest in the ZIP: 6.89 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 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
2/2 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: 5.4 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 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
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: 4.56 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 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
Selenium
3.52 µg/L 7%
of the EPA limit 50 µg/L
Highest in the ZIP: WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 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
Highest in the ZIP: 1.51 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 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
2/2 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
1/2 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: 1.01 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
2/2 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
2/2 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
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
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: 0.0012 mg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2025
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 78736

SupplierStatePopulation served
CITY OF AUSTIN WATER & WASTEWATER TX 1,115,323
WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY TX 35,664

Frequently asked questions about ZIP 78736 tap water

Is the tap water in ZIP 78736 safe to drink?

EPA testing detected 31 contaminants across the water suppliers serving ZIP 78736. 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 78736?

2 public water suppliers report EPA drinking-water monitoring for ZIP 78736. Each is listed above with its population served.

What contaminants are in ZIP 78736's water?

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