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

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

Gallup Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

groundwater

pH Level

8.1

neutral = 7.0

Lead

0.006 mg/L

✓ Below action level

TDS

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

Appliance	In Gallup	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 Gallup compares to its nearest neighbours

City	Hardness	Risk	Source
▶ Gallup, New Mexico	≈ 120–179 mg/L	🟠 Hard	groundwater
Farmington, New Mexico	≈ 120–179 mg/L	🟠 Hard	reservoir
Show Low, Arizona	≈ 120–179 mg/L	🟠 Hard	groundwater
Durango, Colorado	≈ 120–179 mg/L	🟠 Hard	reservoir
Rio Rancho, New Mexico	≈ 120–179 mg/L	🟠 Hard	reservoir

National Benchmark

How Gallup compares to the USA average

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

Local geology and source profile

Source: GroundwaterTDS: 891 mg/LpH: 8.1

The Gallup Water System serves approximately 21,000–22,000 residents in McKinley County, New Mexico. The utility operates 16 production wells drawing from two primary underground aquifers: the Gallup Sandstone and the Dakota-Westwater Formation. Water is treated via air stripping to address volatile organic compounds and disinfected with chlorine and hypochlorite before distribution. The utility is located at 110 West Aztec, Gallup, NM 87301 (contact: 505-863-1209) and publishes an annual Consumer Confidence Report detailing contaminant testing results and treatment processes.

Gallup's water supply originates from Cretaceous-age sedimentary formations characteristic of the Colorado Plateau region. The Gallup Sandstone and San Andres Limestone aquifers are the primary geological sources, both containing significant dissolved calcium and magnesium minerals along with bicarbonate and sulfate ions. This geological setting naturally produces a hard water supply. The aquifer formations yield water with dissolved solids generally below 1,000 mg/L, though some wells historically report elevated iron and sulfate concentrations.

Hard water from the Gallup Water System means residents experience reduced soap lather, mineral buildup on fixtures and appliances, and potential scaling in water heaters and pipes. Dishwashers, washing machines, and hot water systems are most vulnerable to mineral deposits. A water softener is recommended to protect plumbing infrastructure and extend appliance lifespan, particularly for households with high hot water demand. Regular descaling of kettles and showerheads helps manage visible deposits. The system currently meets all EPA Maximum Contaminant Level Goals (MCLGs) across all contaminants tested and earns an overall water quality grade of B.

Geology & Source: Cretaceous sedimentary aquifers — Gallup Sandstone and Dakota-Westwater Formation; San Andres Limestone contributes calcium, magnesium, bicarbonate, and sulfate ions producing hard water

Other New Mexico Water Reports

Farmington

≈ 120–179 mg/L

🟠 Hard

Show Low

≈ 120–179 mg/L

🟠 Hard

Durango

≈ 120–179 mg/L

🟠 Hard

Rio Rancho

≈ 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 Gallup's water safe to drink?

Yes. Gallup'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 Gallup?

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

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