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Water Hardness in Onalaska, TX

Texas · 1 zip codes · 4 matched water systems

184 PPM
10.7 GPG
Hard
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 20264 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

Source context

How this city reading is built

This city reading is a weighted rollup across 4 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
3 USGS-backed sources
4 matched systems total for this city; USGS monitoring is used where treated-water reports are unavailable.
Water source profile
Primarily surface water
Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.
Data recency
March 9, 2026
Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

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 in Onalaska

These systems are matched to Onalaska, TX. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

4 water systems
PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.
City Of Livingston
TX1870002
Moderately Hard
156 PPMsurface water15,199 servedHigh Confidence — USGS Monitoring
Onalaska Wsc
TX1870009
Very Hard
250 PPMgroundwater5,289 servedHigh Confidence — USGS Monitoring
Canyon Park Wsc
TX1870034
Very Hard
250 PPMgroundwater1,200 servedHigh Confidence — USGS Monitoring
Oak Terrace Estates Water System
TX1870055
Moderately Hard
156 PPMgroundwater531 servedEstimated — County Avg

Zip Codes in Onalaska, TX

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

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If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Onalaska, TX.

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Frequently Asked Questions

How hard is the water in Onalaska, TX?

The citywide weighted average water hardness in Onalaska, TX is 184 PPM (10.7 GPG), classified as hard. This is based on 4 matched water systems.

Do I need a water softener in Onalaska, TX?

With a citywide average hardness of 184 PPM, a water softener is recommended for homes in Onalaska. Confirm your tap reading before sizing equipment.

Is hard water in Onalaska, TX 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 Onalaska, TX?

Onalaska, Texas is served by 4 matched water systems across 1 zip code.

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