Water Hardness in 78758
Austin, Texas · Travis County
Dataset updated March 9, 2026Matched to 14 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 14 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.
Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.
Water Systems Serving 78758
These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
| City Of Austin Water & Wastewater TX2270001 | surface water | 120 PPM Moderately HardUSGS estimate: 320 PPM | |
| City Of Pflugerville TX2270014 | surface water | 120 PPM Moderately HardUSGS estimate: 320 PPM | |
| Travis County Wcid 17 TX2270027 | surface water | 120 PPM Moderately HardUSGS estimate: 334 PPM | |
| Manville Wsc TX2270033 | surface water | 120 PPM Moderately HardUSGS estimate: 170 PPM | |
| West Travis County Public Utility Agency TX2270235 | surface water | 120 PPM Moderately HardUSGS estimate: 334 PPM |
Nearby Zip Codes
What This Means For You
Use this ZIP reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.
Know your water hardness?
If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Austin, TX (78758).
Frequently Asked Questions
Is the water hard in Austin, TX (78758)?
The average water hardness in 78758 is 120 PPM (7 GPG), which is classified as moderately hard.
Do I need a water softener in 78758?
With hardness of 120 PPM, a water softener is worth considering for homes in 78758.
Is hard water in 78758 safe to drink?
Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.
How many water systems serve 78758?
Zip code 78758 in Austin, Texas is served by 14 water systems.
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