Texas hard water, by the utility’s own numbers
This directory starts with Texas metros where we could read a published hardness figure from the water utility (or a document the utility still links). Every number on a city page cites its source. Product links are placeholders until affiliate programs are approved.
Hardness is an aesthetic measure, not a federal health standard. USGS: “Hardness is a property of water that is not a health concern, but it can be a nuisance.” Source: USGS Hardness of Water.
Cities with sourced hardness data
| City | Hardness (as published) | USGS class | Utility |
|---|---|---|---|
| Round Rock | 15.1 gpg avg | very hard | City of Round Rock |
| San Antonio | 15–20 gpg | very hard | San Antonio Water System (SAWS) |
| Kyle | 16.1–17.3 gpg | very hard | City of Kyle |
| El Paso | 10.2 gpg avg | hard | El Paso Water |
| Fort Worth | 6–9 gpg | hard | City of Fort Worth |
| Austin | 5.4 gpg avg | moderately hard | Austin Water |
Next guides (buyer intent order)
- Do I need a water softener?
- Water softener vs whole-house filter
- How to read water hardness (gpg and mg/L)
- Salt vs salt-free softener
- Water softener cost in Texas
- How to size a water softener
- Hire a Water Treatment Specialist in Texas
- Hard water and your water heater
- Why a softener needs a bypass valve
- Test your tap before you buy a softener
Texas Water Treatment Specialist contacts (TCEQ authorized-release list only).