Austin, Texas
| Contaminant | Detected | EPA limit | EWG guideline | Status |
|---|---|---|---|---|
| Total Trihalomethanes (TTHMs) | 38.2 ppb | 80 ppb | 0.8 ppb | 48× EWG |
| Haloacetic Acids (HAA5) | 22.6 ppb | 60 ppb | 0.1 ppb | 226× EWG |
| Chloramine | 2.7 mg/L | 4 mg/L | — | — |
| Lead | 1.4 ppb | 15 ppb | 0.5 ppb | 3× EWG |
| Total Hardness (as CaCO3) | 180 mg/L | — | — | — |
Context
Austin has experienced periodic taste and odor events caused by algae blooms in Lake Travis and Lake Austin, producing MIB and geosmin compounds that create an earthy, musty taste. These are not harmful but are unpleasant.
The rapid population growth (Austin is one of the fastest-growing US cities) is straining water treatment capacity and distribution infrastructure.
Moderately hard water (180 mg/L) causes noticeable scale buildup, though less severe than Phoenix or San Antonio.
Common questions
Is Austin TX water safe to drink?
Yes — Austin water meets all EPA standards and has relatively low contaminant levels compared to other Texas cities. The main concerns are disinfection byproducts (exceeding EWG guidelines), periodic taste issues from algae in the source lakes, and moderate water hardness. A quality carbon filter addresses the primary drinking water concerns.
Why does Austin water taste bad sometimes?
Austin periodically experiences earthy, musty taste and odor from algae blooms in Lake Travis and Lake Austin. The compounds responsible (MIB and geosmin) are not harmful but are detectable at very low concentrations. Activated carbon filters effectively remove these taste compounds. The issue tends to be worst in late summer when water temperatures peak.
Austin's water quality is decent by Texas standards, with lower contaminant levels than Houston or Dallas. The main complaints are periodic taste issues from algae blooms and moderate hardness.
the Colorado River via Lake Austin and Lake Travis, treated at three water treatment plants — Ullrich, Davis, and Handcox
This data reflects system-wide testing. Your home's plumbing may add or reduce contaminants.
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