Water Hardness in 78028
Kerrville, Texas · Kerr County
Dataset updated March 9, 2026Matched to 12 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 12 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 78028
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 Kerrville TX1330001 | surface water | 295 PPM Very HardUSGS estimate: 303 PPM | |
| Kerrville Va Hospital TX1330095 | groundwater | 295 PPM Very HardUSGS estimate: 303 PPM | |
| Southern Hills TX1330128 | groundwater | 295 PPM Very HardUSGS estimate: 303 PPM | |
| Woods Wsc TX1330085 | groundwater | 295 PPM Very HardUSGS estimate: 303 PPM | |
| Kerrville Rv Park And Cabins TX1330170 | groundwater | 295 PPM Very HardUSGS estimate: 303 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 Kerrville, TX (78028).
Frequently Asked Questions
Is the water hard in Kerrville, TX (78028)?
The average water hardness in 78028 is 295 PPM (17.3 GPG), which is classified as very hard.
Do I need a water softener in 78028?
With hardness of 295 PPM, a water softener is recommended for homes in 78028.
Is hard water in 78028 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 78028?
Zip code 78028 in Kerrville, Texas is served by 12 water systems.
Learn More About Your Water
How to Test Water Hardness at Home
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