How does Okmulgee's water compare to the national average?

The USA national average is 151 mg/L. Okmulgee (≈ 120–179 mg/L) is 1 mg/L softer than average.

Okmulgee Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

8.2

neutral = 7.0

Lead

0.004 mg/L

✓ Below action level

TDS

418.9 mg/L

Est. Daily Cost

$0.40

energy & soap waste

Source: See methodology section below · Updated 2026

hard~120–179 mg/LHard · est.

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 Okmulgee, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Okmulgee	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 Okmulgee compares to its nearest neighbours

City	Hardness	Risk	Source
▶ Okmulgee, Oklahoma	≈ 120–179 mg/L	🟠 Hard	reservoir
Bixby, Oklahoma	140 mg/L	🟠 Hard	reservoir
Glenpool, Oklahoma	≈ 120–179 mg/L	🟠 Hard	reservoir
Jenks, Oklahoma	≈ 120–179 mg/L	🟠 Hard	reservoir
Sapulpa, Oklahoma	≈ 120–179 mg/L	🟠 Hard	reservoir

National Benchmark

How Okmulgee compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Okmulgee	≈ 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 Okmulgee's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 418.9 mg/LpH: 8.2

Okmulgee Municipal Water (OK1020708) provides drinking water to more than 12,000 residents across Okmulgee, Oklahoma, and Okmulgee County. The utility draws its supply from surface water sources within the Arkansas River watershed. Water treatment, including chlorine disinfection, is carried out by the city at its facilities, with water distributed through the municipal system. While specific reservoirs or rivers weren't named, the supply is typical of regional surface water systems in the area.

The region's geology, particularly the Ozark Plateau margins, features Pennsylvanian-age bedrock formations. These include sandstones, shales, and limestones, such as the Savanna and Boggy Formations. Natural weathering and runoff from these formations, along with influences from karst features and alluvial deposits, introduce minerals like calcium and magnesium into the water. This geological makeup naturally results in a hard water profile for the supply.

Homeowners in Okmulgee may notice scale buildup on pipes, water heaters, and fixtures, which can reduce efficiency and shorten the lifespan of appliances like dishwashers and washing machines. To combat these effects, regular maintenance such as deliming and using scale inhibitors can be beneficial. Installing a water softener is often recommended to prevent spotting on dishes and glassware and to extend the life of household appliances. The utility has noted exceedances for several contaminants, including Total Trihalomethanes (TTHMs), which are formed during the disinfection process.

Geology & Source: Pennsylvanian sandstones, shales, and limestones; Savanna and Boggy Formations; karst features and alluvial deposits contribute to moderate to hard water

Other Oklahoma Water Reports

Bixby

140 mg/L

🟠 Hard

Glenpool

≈ 120–179 mg/L

🟠 Hard

Jenks

≈ 120–179 mg/L

🟠 Hard

Sapulpa

≈ 120–179 mg/L

🟠 Hard

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Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

All reports are reviewed by our team. Thank you for supporting data quality!

Frequently Asked Questions

Is Okmulgee's water safe to drink?

Yes. Okmulgee's water meets all federal safety standards. The hardness is ≈ 120–179 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Okmulgee?

At ≈ 120–179 mg/L (Hard), Okmulgee's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 20%.

How does Okmulgee compare to the USA average?

The USA national average is 151 mg/L. Okmulgee (≈ 120–179 mg/L) is 1 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Okmulgee is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

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.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

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.

Measured

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.

Modelled

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.

Calculated

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.