Chickasha Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
reservoir
pH Level
6.8
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
125.4 mg/L
Est. Daily Cost
$0.40
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 Chickasha, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Chickasha | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.8 yrs | 8.5 yrs | -20% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Chickasha compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Chickasha, Oklahoma | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
| Mustang, Oklahoma | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
| El Reno, Oklahoma | ≈ 180+ mg/L | 0 ppt | 🔴 Very Hard | reservoir |
| Yukon, Oklahoma | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
| Norman, Oklahoma | 73 mg/L | 53.3 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Chickasha compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Chickasha | ≈ 120–179 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Chickasha's Water Unique?
Local geology and source profile
The Chickasha Municipal Authority is the public water utility serving the city of Chickasha, Oklahoma, and surrounding areas in Grady County, with a population of approximately 16,510 residents. The utility sources its drinking water exclusively from surface water drawn from the Fort Cobb Reservoir on the Washita River. Water is treated at the Chickasha Municipal Authority's water treatment plant located at 117 N. 4th St., Chickasha, OK 73018. The service area covers the city limits and nearby communities reliant on this reservoir supply.
The Washita River watershed, part of the broader Arkansas River basin in the Anadarko Basin geologic province, features key formations like Permian-age Chickasha Formation sandstones, Blaine Gypsum, and underlying carbonate-rich layers like dolomite and limestone from the Woodward Formation. These evaporite and sedimentary rocks dissolve readily, imparting a hard character to the surface water through natural mineral dissolution during rainfall runoff and reservoir storage. The geology promotes elevated levels of calcium and magnesium, shaping a mineralized supply typical of Oklahoma's southern plains.
Homeowners in Chickasha may notice the effects of mineral buildup on their appliances, as scale can reduce the efficiency and lifespan of water heaters, dishwashers, and washing machines. To mitigate this, regular vinegar descaling of faucets and showerheads, installing drain screens, and flushing water heaters biannually can help. A whole-house water softener is highly recommended to prevent scale, extend appliance life, and improve cleaning performance. Residents can consult the Chickasha Municipal Authority's annual Consumer Confidence Report via cityoftchickasha.org or EPA SDWIS for the latest testing data on potential contaminants like bromochloroacetic acid, desethylatrazine, and chloroethane.
Geology & Source: Washita River watershed - Permian period; Blaine Formation, Anadarko Basin sediments, gypsum, dolomite, limestone; mineral leaching from limestone, dolomite
Other Oklahoma Water Reports
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Frequently Asked Questions
Is Chickasha's water safe to drink?
Do I need a water softener in Chickasha?
How does Chickasha compare to the USA average?
Data Sources & Methodology
Water quality data for Chickasha 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.