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

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

Farmington Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

8.1

neutral = 7.0

Lead

0.002 mg/L

✓ Below action level

TDS

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

Appliance	In Farmington	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 Farmington compares to its nearest neighbours

City	Hardness	Risk	Source
▶ Farmington, New Mexico	≈ 120–179 mg/L	🟠 Hard	reservoir
Durango, Colorado	≈ 120–179 mg/L	🟠 Hard	reservoir
Gallup, New Mexico	≈ 120–179 mg/L	🟠 Hard	groundwater
Montrose, Colorado	≈ 120–179 mg/L	🟠 Hard	reservoir
Los Alamos, New Mexico	≈ 120–179 mg/L	🟠 Hard	groundwater

National Benchmark

How Farmington compares to the USA average

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

Local geology and source profile

Source: ReservoirTDS: 402 mg/LpH: 8.1

The City of Farmington Utilities Division operates the municipal water system serving Farmington in San Juan County, New Mexico, and surrounding communities. Water is drawn from the San Juan River, treated at the Farmington Water Treatment Plant using conventional processes including coagulation, sedimentation, filtration, and disinfection before distribution. The system delivers treated surface water to over 40,000 residents throughout the historic Four Corners region, with compliance verified across more than 500 tests for over 90 contaminants per the 2021 Consumer Confidence Report.

The San Juan River watershed drains a vast area of the Colorado Plateau, picking up minerals from sedimentary rock formations including limestone and sandstone within the San Juan Basin. These geological features, shaped over millions of years, leach calcium and magnesium into the river, resulting in a moderately mineralised supply. The arid environment and upstream influences from agricultural runoff and natural mineral deposits in the basin contribute further to the water's character.

Moderately hard water causes scale buildup in pipes, water heaters, and dishwashers, reducing efficiency and lifespan while producing spots on glassware and dry skin from soap scum. Limescale accumulates over time in washing machines and faucets. Regular vinegar descaling and installing a water softener are recommended to prevent issues and extend equipment life. The 2021 Consumer Confidence Report confirms no regulatory violations, though third-party analysis notes disinfection byproducts including trihalomethanes, hexavalent chromium, and radium exceed health guidelines while remaining legally compliant.

Geology & Source: San Juan River watershed, Colorado Plateau; San Juan Basin limestone and sandstone — carbonate dissolution leaches calcium and magnesium; arid evaporitic and calcareous bedrock produces moderately mineralised river supply

Other New Mexico Water Reports

Durango

≈ 120–179 mg/L

🟠 Hard

Gallup

≈ 120–179 mg/L

🟠 Hard

Montrose

≈ 120–179 mg/L

🟠 Hard

Los Alamos

≈ 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 Farmington's water safe to drink?

Yes. Farmington'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 Farmington?

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

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