State water index

Texas water hardness

Search 529 indexed communities and 1,026 ZIP profiles, then compare the underlying utility, source, distance, and reporting context.

Median indexed hardness

111PPM

Moderately Hard

Indexed range 5.4–500.5 PPM

ZIP profiles: 1,026
Cities: 529
Matched utilities: 537
Counties: 220

Understanding Texas

Why local comparisons matter here

Texas contains numerous aquifers, major reservoirs and rivers, Gulf Coastal Plain systems, limestone regions, and arid western basins. Many metros blend several sources.

In this index, moderately hard is the largest category, covering 481 of 1,019 profiles with hardness data. The state median is 111 PPM, but the full indexed range is 5.4–500.5 PPM.

State distribution

Hardness across indexed ZIPs

Counts describe published ZIP profiles, not a population-weighted statewide sample.

Soft · 0–60 PPM85

Moderately hard · 61–120 PPM481

Hard · 121–180 PPM112

Very hard · 181+ PPM341

Evidence coverage

What the current records support

Hardness estimate: 99%
Lead 90th percentile: 100%
Copper 90th percentile: 4%

276

Low-confidence hardness profiles

255

Nearest site more than 25 miles away

Reported source water

Utility source mix

Surface water: 313
Groundwater: 222
Groundwater influenced by surface water: 2

Highest medians

Hardest indexed cities

1. Roscoe501 PPM
2. El Paso491 PPM
3. Andrews465 PPM
4. Van Horn450 PPM
5. Ingleside439 PPM

Lowest medians

Softest indexed cities

City directory

Explore Texas by city

Search by city or county, then sort by name, hardness, or ZIP coverage.

529 cities · 1,026 ZIP profiles

Search city or county

County

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529 cities found

Page 1 of 23

Abernathy

Hale County · 1 ZIP

409PPM

County	Median	Range	ZIP profiles
El Paso County	491 PPM	490.5–490.5	18
Andrews County	465 PPM	464.5–464.5	1
Culberson County	450 PPM	450–450	1
Gaines County	424 PPM	419.5–428	2
Winkler County	424 PPM	419.5–428	2
Ector County	421 PPM	369–420.5	3
San Patricio County	392 PPM	135–439	6
Ward County	391 PPM	391–391	1
Yoakum County	385 PPM	385–385	1
Brewster County	368 PPM	341–395.5	2
Crane County	367 PPM	367–367	1
Randall County	358 PPM	358–358	2

Why local comparisons matter here

Hardness across indexed ZIPs

What the current records support

Utility source mix

Hardest indexed cities

Softest indexed cities

Explore Texas by city

Abernathy

Abilene

Alamo

Albany

Alice

Allen

Alpine

Alto

Alvarado

Alvin

Alvord

Amarillo

Anahuac

Andrews

Angleton

Anna

Anson

Aransas Pass

Arlington

Arp

Asherton

Athens

Atlanta

Austin

Highest indexed county medians