Stephenville Water Hardness & Quality Report (2026)
Water Hardness
18.3 grains per gallon
Source
reservoir
pH Level
9.5
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
298 mg/L
Est. Daily Cost
$0.84
energy & soap waste
Source: See methodology section below · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Stephenville, your appliances are currently losing 42% efficiency due to mineral buildup.
| Appliance | In Stephenville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3 yrs | 12 yrs | -75% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Stephenville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Stephenville, Texas | 314 mg/L | 0 ppt | 🔴 Very Hard | reservoir |
| Mineral Wells, Texas | 161.5 mg/L | 33.2 ppt | 🟠 Hard | reservoir |
| Weatherford, Texas | ≈ 180+ mg/L | 68.9 ppt | 🔴 Very Hard | reservoir |
| Cleburne, Texas | ≈ 120–179 mg/L | 20.7 ppt | 🟠 Hard | reservoir |
| Benbrook, Texas | ≈ 180+ mg/L | 14.6 ppt | 🔴 Very Hard | reservoir |
National Benchmark
How Stephenville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Stephenville | 314 mg/L | 🔴 High |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Stephenville's Water Unique?
Local geology and source profile
Stephenville, Texas is served by the City of Stephenville Water Utility, which operates a municipal water system serving the city and surrounding areas in Erath County. The utility draws from groundwater sources typical of central Texas and operates treatment facilities to deliver water meeting all state and federal standards. The drinking water is recognized by the state as superior, meeting or surpassing all state and federal drinking water requirements. Consumer Confidence Reports are published regularly and accessible via stephenvilletx.gov.
The Stephenville water supply is sourced from the Brazos River basin's groundwater aquifers, which flow through extensive Cretaceous-age limestone and chalk formations. These carbonate-rich rock layers dissolve significant quantities of calcium and magnesium into the groundwater as it percolates through the subsurface. This geological setting is typical of the region and results in a very hard water supply, consistent with central Texas's position as one of the nation's hardest-water areas.
At the very hard classification, Stephenville residents will experience significant scaling on fixtures, reduced soap and detergent efficiency, and accelerated wear on water heaters and appliances. Without treatment, mineral buildup in pipes can reduce water pressure over time and increase energy consumption in heating systems. A water softener is strongly recommended to extend appliance lifespan, improve cleaning effectiveness, and reduce maintenance costs. Stephenville's water meets EPA standards with zero violations reported since 2023, and lead levels are extremely low at 0.0041 mg/L — well below the EPA action level. Residents with water quality concerns may contact the customer service department at 254-918-1220 or the Water Superintendent at 254-918-1235.
Geology & Source: Brazos River basin groundwater — Cretaceous limestone and chalk formations rich in calcium and magnesium carbonate; prolonged percolation through carbonate bedrock produces very hard water typical of central Texas
Other Texas Water Reports
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Frequently Asked Questions
Is Stephenville's water safe to drink?
Do I need a water softener in Stephenville?
How does Stephenville compare to the USA average?
Data Sources & Methodology
Water quality data for Stephenville is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.