Tap water · TX
Austin Water
EPA system ID TX2270001 · serves about 1,115,323 people. Every US utility must publish an annual water quality report — here’s the official one (2025), and below it, our plain-English translation.
Read the official report →What Austin Water found in 2025
14 detected analytes from the utility’s own annual report, hand-normalized — nothing was near or over a federal health-based limit.
| Detected | Level | Limit | % of limit | Status |
|---|---|---|---|---|
| Chloramines | 2.3 ppm | 4 ppm | 58% | Within limit |
| Total Trihalomethanes (TTHM) | 45.5 ppb | 80 ppb | 57% | Within limit |
| Haloacetic Acids (HAA5) | 15.6 ppb | 60 ppb | 26% | Within limit |
| Cyanide | 50 ppb | 200 ppb | 25% | Within limit |
| Fluoride | 0.66 ppm | 4 ppm | 17% | Within limit |
| Beta/photon emitters (pCi/L) 2024 | 4.5 pCi/L | 50 pCi/L | 9% | Within limit |
| Simazine (ppb) 2024 | 0.03 ppb | 4 ppb | 1% | Within limit |
| Barium | 0.012 ppm | 2 ppm | 1% | Within limit |
| Nitrate (as Nitrogen) | 0.05 ppm | 10 ppm | 1% | Within limit |
| Total Hardness (as CaCO3) (ppm) [gpg] | 93 ppm | — | — | No federal limit |
| Chloroform | 14.1 ppb | — | — | No federal limit |
| Bromodichloromethane | 13.7 ppb | — | — | No federal limit |
| Dibromochloromethane | 10.3 ppb | — | — | No federal limit |
| Bromoform | 1.7 ppb | — | — | No federal limit |
Levels and limits are as printed in the utility’s report (“limit” is the EPA MCL, action level, residual limit, or secondary guideline that applies to that row; “ND” = not detected). Utilities publish these reports annually — we re-check every covered utility each July, after the federal publication deadline. Detected doesn’t mean dangerous — most detections sit far below their limits. This is education, not medical advice.
Zip codes covered
78701 · 78702 · 78703 · 78704 · 78705 · 78721 · 78722 · 78723 · 78724 · 78726 · 78727 · 78729 · 78730 · 78731 · 78735 · 78736 · 78739 · 78741 · 78742 · 78744 · 78745 · 78747 · 78748 · 78749 · 78750 · 78751 · 78752 · 78753 · 78754 · 78756 · 78757 · 78758 · 78759
Boundary zips partially served by other systems are deliberately unlisted — check your exact zip.