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Tap water quality report

Austin, TX

EPA monitoring detected 47 contaminants across the 58 water suppliers serving Austin. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

58
water suppliers
1,347,613
people served
47
contaminants found
Texas rankings Lead in Texas PFAS in Texas

What was found in Austin's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
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 city: 3370 µg/L — MOORELAND SUBDIVISION · 156 people · 2019
25/58 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 city: 3332 µg/L — ONION CREEK MEADOWS · 696 people · 2019
25/58 SYR4
Nitrate-Nitrite
2271 µg/L 23%
of the EPA limit 10000 µg/L
Highest in the city: LAKECLIFF ON LAKE TRAVIS · 351 people · 2015
15/58 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 city: 1400 µg/L — WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY · 35,664 people · 2019
54/58 SYR4
Chlorite
394 µg/L 39%
of the EPA limit 1000 µg/L
Highest in the city: TRAVIS COUNTY WCID 17 · 45,165 people · 2014
1/58 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
Highest in the city: 158.5 µg/L — LOOP 360 WSC · 1,743 people · 2019
13/58 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 city: 129.7 µg/L — TRAVIS COUNTY MUD 10 · 490 people · 2019
54/58 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 city: 129.55 µg/L — ARROYO DOBLE WATER SYSTEM · 945 people · 2018
25/58 SYR4
Nitrite
120 µg/L 12%
of the EPA limit 1000 µg/L
Highest in the city: CYPRESS RANCH WCID 1 · 1,785 people · 2016
1/58 SYR4
Chloroform
30.285 µg/L
No EPA limit set
Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2019
Highest in the city: 66.405 µg/L — TRAVIS COUNTY MUD 10 · 490 people · 2019
52/58 SYR4
Lithium
62 µg/L
No EPA limit set
Highest in the city: SANDY CREEK RANCHES SUBDIVISION · 2,022 people · 2025
3/58 UCMR-5
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 city: 61.28 µg/L — LOOP 360 WSC · 1,743 people · 2019
53/58 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 city: 39.62 µg/L — TRAVIS COUNTY MUD 10 · 490 people · 2019
52/58 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 city: 34.5 µg/L — ST STEPHENS EPISCOPAL SCHOOL · 700 people · 2018
50/58 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 city: 31.85 µg/L — INVERNESS POINT WATER SYSTEM · 435 people · 2019
54/58 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 city: 28.98 µg/L — LOOP 360 WSC · 1,743 people · 2019
49/58 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 city: 27.505 µg/L — LOOP 360 WSC · 1,743 people · 2019
38/58 SYR4
Di(2-ethylhexyl) Phthalate
22.704 µg/L 378%
of the EPA limit, at the 95th percentile of samples — 6 µg/L
Highest in the city: WINDERMERE COMMUNITY · 21,231 people · 2019
8/58 SYR4
Gross Alpha, Excl. Radon And U
19.1 pCi/L 127%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Highest in the city: HILL COUNTRY NORTHWEST CHERRY HOLLOW · 1,002 people · 2019
12/58 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
Highest in the city: 18.5 pCi/L — HILL COUNTRY NORTHWEST CHERRY HOLLOW · 1,002 people · 2019
19/58 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 city: 18.185 µg/L — THE COVES WSC · 648 people · 2019
53/58 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 city: 10.62 µg/L — LOOP 360 WSC · 1,743 people · 2019
27/58 SYR4
Selenium
8.871 µg/L 18%
of the EPA limit 50 µg/L
Highest in the city: THE COVES WSC · 648 people · 2019
13/58 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 city: 7.29 µg/L — TRAVIS COUNTY WCID 19 · 597 people · 2019
50/58 SYR4
Combined Uranium
5.545 µg/L 18%
of the EPA limit 30 µg/L
Highest in the city: CANYON RIDGE SPRINGS · 111 people · 2017
7/58 SYR4
Combined Radium (-226 And -228)
5.017 pCi/L 100%
of the EPA limit, at the 95th percentile of samples — 5 pCi/L
Highest in the city: HILL COUNTRY NORTHWEST CHERRY HOLLOW · 1,002 people · 2019
19/58 SYR4
Xylenes, Total
4.66 µg/L 0%
of the EPA limit 10000 µg/L
Highest in the city: ARROYO DOBLE WATER SYSTEM · 945 people · 2019
7/58 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
2/58 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 city: 3.925 µg/L — HILL COUNTRY NORTHWEST CHERRY HOLLOW · 1,002 people · 2018
15/58 SYR4
Toluene
3.17 µg/L 0.3%
of the EPA limit 1000 µg/L
Highest in the city: ONION CREEK MEADOWS · 696 people · 2019
1/58 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 city: 2.6 µg/L — TRAVIS COUNTY WCID 17 · 45,165 people · 2019
18/58 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 city: 1.71 µg/L — MOORELAND SUBDIVISION · 156 people · 2019
13/58 SYR4
Dalapon
1.3 µg/L 0.7%
of the EPA limit 200 µg/L
Highest in the city: TRAVIS COUNTY MUD 10 · 490 people · 2019
3/58 SYR4
Thallium, Total
1.039 µg/L 52%
of the EPA limit 2 µg/L
Highest in the city: WINDERMERE COMMUNITY · 21,231 people · 2019
2/58 SYR4
Ethylbenzene
0.8000 µg/L 0.1%
of the EPA limit 700 µg/L
Highest in the city: ARROYO DOBLE WATER SYSTEM · 945 people · 2019
1/58 SYR4
Carbon Tetrachloride
0.6000 µg/L 12%
of the EPA limit 5 µg/L
Highest in the city: TRAVIS COUNTY WCID 18 · 5,733 people · 2019
1/58 SYR4
2,4-D
0.2000 µg/L 0.3%
of the EPA limit 70 µg/L
Highest in the city: BEAR CREEK PARK · 270 people · 2019
1/58 SYR4
Atrazine
0.1480 µg/L 4.9%
of the EPA limit 3 µg/L
Highest in the city: TRAVIS COUNTY MUD 4 · 6,816 people · 2019
1/58 SYR4
Bhc-Gamma
0.0800 µg/L 40%
of the EPA limit 0.2000 µg/L
Highest in the city: TRAVIS COUNTY WCID 17 · 45,165 people · 2019
1/58 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
3/58 SYR4
PFBS
0.0051 µg/L
No EPA limit set
Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024
Highest in the city: 0.0092 µg/L — WINDERMERE COMMUNITY · 21,231 people · 2025
3/58 UCMR-5
Pfba
0.0084 µg/L
No EPA limit set
Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024
6/58 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 city: 0.0079 mg/L — BARTON CREEK LAKESIDE · 1,023 people · 2025
57/58 LCR
PFOS
0.0048 µg/L
No EPA limit set
Main supplier: CITY OF AUSTIN WATER & WASTEWATER · 1,115,323 people · 2024
Highest in the city: 0.0075 µg/L — WINDERMERE COMMUNITY · 21,231 people · 2025
2/58 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 city: 0.0065 µg/L — WINDERMERE COMMUNITY · 21,231 people · 2025
3/58 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 city: 0.0059 µg/L — WINDERMERE COMMUNITY · 21,231 people · 2025
4/58 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 city: 0.0039 µg/L — WINDERMERE COMMUNITY · 21,231 people · 2025
2/58 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. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Austin

The 50 largest of 58 suppliers serving Austin, by population served.

SupplierPopulation served
CITY OF AUSTIN WATER & WASTEWATER 1,115,323
TRAVIS COUNTY WCID 17 45,165
WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY 35,664
WINDERMERE COMMUNITY 21,231
WELLS BRANCH MUD 1 18,015
NORTHTOWN MUD 11,520
NORTH AUSTIN MUD 1 11,133
AUSTINS COLONY 9,987
TRAVIS COUNTY MUD 4 6,816
TRAVIS COUNTY WCID 18 5,733
COTTONWOOD CREEK MUD 1 5,082
LAZY NINE MUD 1B 4,669
SHADY HOLLOW MUD 4,269
WILBARGER CREEK MUD 1 3,459
TRAVIS COUNTY MUD 14 3,333
TRAVIS COUNTY MUD 2 3,294
LAKESIDE WCID 2-C 3,084
BRIARCREEK SUBDIVISION 3,075
LAKESIDE MUD 3 2,832
LAKESIDE WCID 2D 2,385
KELLY LANE WCID 1 2,331
SANDY CREEK RANCHES SUBDIVISION 2,022
CYPRESS RANCH WCID 1 1,785
LOOP 360 WSC 1,743
LAKESIDE WCID 1 1,680
TRAVIS COUNTY MUD 12 1,644
TRAVIS COUNTY MUD 13 1,644
TRAVIS COUNTY MUD 11 1,437
RIVERCREST WATER SYSTEM 1,437
LAKESIDE WCID 2-B 1,419
LAKESIDE WCID 2-A 1,353
KELLY LANE WCID 2 1,221
SENNA HILLS MUD 1,215
TRAVIS COUNTY WCID 20 1,092
BARTON CREEK LAKESIDE 1,023
HILL COUNTRY NORTHWEST CHERRY HOLLOW 1,002
ARROYO DOBLE WATER SYSTEM 945
SHADY HOLLOW ESTATES WSC 711
ST STEPHENS EPISCOPAL SCHOOL 700
ONION CREEK MEADOWS 696
THE COVES WSC 648
TRAVIS COUNTY WCID 19 597
LAKESIDE MUD 5 546
TRAVIS COUNTY MUD 10 490
MARSHA WSC 480
INVERNESS POINT WATER SYSTEM 435
NIGHTHAWK WSC 396
LAKECLIFF ON LAKE TRAVIS 351
BEAR CREEK PARK 270
HIGH VALLEY WSC 231

Frequently asked questions about Austin tap water

Is Austin tap water safe to drink?

EPA testing detected 47 contaminants in the water serving Austin. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Austin?

58 public water suppliers report drinking-water monitoring for Austin, Texas to the EPA. Each is listed above with its population served.

What contaminants are in Austin's water?

The contaminants EPA monitoring detected in Austin include Nitrate, Fluoride, Nitrate-Nitrite, Copper, Chlorite. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.