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

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

Guymon Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

groundwater

pH Level

7.9

neutral = 7.0

Lead

0.008 mg/L

✓ Below action level

TDS

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

Appliance	In Guymon	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 Guymon compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Guymon, Oklahoma	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater
Liberal, Kansas	≈ 180+ mg/L	0 ppt	🔴 Very Hard	groundwater
Dumas, Texas	≈ 180+ mg/L	0 ppt	🔴 Very Hard	groundwater
Borger, Texas	≈ 180+ mg/L	0 ppt	🔴 Very Hard	reservoir
Pampa, Texas	≈ 180+ mg/L	3.2 ppt	🔴 Very Hard	reservoir

National Benchmark

How Guymon compares to the USA average

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

Local geology and source profile

Source: GroundwaterTDS: 371 mg/LpH: 7.9

The City of Guymon is the municipal water utility for Oklahoma's Texas County, drawing its primary supply from the Ogallala Aquifer. This vast groundwater formation is accessed through a network of wells, including one capable of producing about 2,000 gallons per minute. The extracted water undergoes treatment at a central facility before being distributed to the city and its residents.

The Ogallala Aquifer, a Tertiary-age formation stretching across the High Plains, is composed of Pliocene and Miocene sand and gravel deposits. As groundwater filters through these permeable sedimentary layers, it dissolves significant amounts of calcium and magnesium. This natural geological process is responsible for the characteristically hard water found in many High Plains groundwater supplies, including Guymon's.

Homeowners in Guymon often notice scale buildup in appliances like water heaters and reduced lathering from soaps and detergents. Fixtures and dishes can develop mineral spots, and the lifespan of dishwashers and washing machines may be shortened by hard water. Many households opt for water softening systems to combat these issues and reduce maintenance. A past public health advisory was issued due to nitrate levels exceeding the EPA's maximum contaminant level.

Geology & Source: Ogallala Aquifer; Tertiary-age sand and gravel deposits produce hard water

Other Oklahoma Water Reports

Liberal

≈ 180+ mg/L

🔴 Very Hard

Dumas

≈ 180+ mg/L

🔴 Very Hard

Borger

≈ 180+ mg/L

🔴 Very Hard

Pampa

≈ 180+ mg/L

🔴 Very Hard

Report an Issue

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 Guymon's water safe to drink?

Yes. Guymon'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 Guymon?

At ≈ 120–179 mg/L (Hard), Guymon'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 Guymon compare to the USA average?

The USA national average is 151 mg/L. Guymon (≈ 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 Guymon 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.