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

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

Durango Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

7.8

neutral = 7.0

Lead

0.008 mg/L

✓ Below action level

TDS

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

Appliance	In Durango	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 Durango compares to its nearest neighbours

City	Hardness	Risk	Source
▶ Durango, Colorado	≈ 120–179 mg/L	🟠 Hard	reservoir
Farmington, New Mexico	≈ 120–179 mg/L	🟠 Hard	reservoir
Montrose, Colorado	≈ 120–179 mg/L	🟠 Hard	reservoir
Clifton, Colorado	≈ 120–179 mg/L	🟠 Hard	reservoir
Grand Junction, Colorado	≈ 120–179 mg/L	🟠 Hard	reservoir

National Benchmark

How Durango compares to the USA average

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

Local geology and source profile

Source: ReservoirTDS: 57 mg/LpH: 7.8

City of Durango Municipal Water serves Durango and surrounding areas in La Plata County, Colorado, sourcing supply from the Animas River via intake at the Durango Water Treatment Plant, supplemented by groundwater wells. The treatment plant processes millions of gallons daily through coagulation, flocculation, sedimentation, filtration, and disinfection. The service area covers the city and nearby unincorporated regions in the San Juan Basin. The 2025 Consumer Confidence Report confirms compliance with EPA standards for microbial, inorganic, and radioactive contaminants; recent 2026 notices highlight testing for Isopropylbenzene and Perchlorate at concerning levels, with pH and hardness routinely monitored as part of annual reporting.

The Animas River watershed spans the San Juan Mountains, with headwaters eroding Precambrian granites and gneisses and flowing through Mesozoic sandstones and shales of the Morrison and Dakota formations. Groundwater taps alluvial gravels and fractured volcanics of the San Juan Formation (Oligocene-Miocene). These limestone, sandstone, and volcanic rocks contribute dissolved calcium and magnesium through rock dissolution, imparting a moderately mineralised, hard supply character shaped by the rugged geology of southwest Colorado's Southern Rocky Mountains.

Moderately hard water promotes scale buildup in pipes, water heaters, and dishwashers, reducing efficiency over time and increasing energy costs. Laundry may feel stiffer, and soap lathering is less effective. Regular descaling of fixtures, vinegar soaks for showerheads, and annual heater flushing are recommended maintenance steps. A water softener is advisable for households noticing spotting on glassware or dry skin after showers. The 2025 Consumer Confidence Report confirms compliance across contaminant categories; treatment includes disinfection to address viruses and bacteria, with contamination sources including urban stormwater, agriculture, and natural geology.

Geology & Source: Animas River, San Juan Mountains — Precambrian igneous and metamorphic rocks, Mesozoic Dakota Sandstone, Tertiary San Juan Formation volcanics; rock dissolution in alluvial and fractured bedrock aquifers yields hard water

Other Colorado Water Reports

Farmington

≈ 120–179 mg/L

🟠 Hard

Montrose

≈ 120–179 mg/L

🟠 Hard

Clifton

≈ 120–179 mg/L

🟠 Hard

Grand Junction

≈ 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 Durango's water safe to drink?

Yes. Durango'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 Durango?

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

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