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Water Hardness in 81301

Durango, Colorado · La Plata County

113 PPM
6.6 GPG
Slightly Hard
0Soft60120180300+
High Confidence - USGS Monitoring

Dataset updated March 9, 2026Matched to 24 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 24 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis
21 USGS-backed sources
24 matched systems total for this ZIP; USGS monitoring is used where treated-water reports are unavailable.
Water source profile
Primarily surface water
Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.
Data recency
March 9, 2026
Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems Serving 81301

These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.

24 water systems
PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.
Durango City Of
CO0134150
Slightly Hard
113 PPMsurface water33,787 servedHigh Confidence - USGS Monitoring
Animas Wc
CO0134020
Slightly Hard
113 PPMgroundwater3,096 servedHigh Confidence - USGS Monitoring
Lake Durango Wa
CO0134530
Slightly Hard
113 PPMsurface water1,577 servedEstimated - County Avg
Purgatory Md
CO0134750
Slightly Hard
113 PPMgroundwater1,364 servedEstimated - County Avg
Edgemont Ranch Md
CO0134200
Slightly Hard
113 PPMsurface water1,200 servedHigh Confidence - USGS Monitoring
Showing the first 5 systems. Expand to review all matched systems.

Nearby Zip Codes

8133284981433881323174811221108142617481435223

What This Means For You

Use this ZIP reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.

MethodologyData sourcesHow to test your water

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Durango, CO (81301).

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Frequently Asked Questions

Is the water hard in Durango, CO (81301)?

The average water hardness in 81301 is 113 PPM (6.6 GPG), which is classified as slightly hard.

Do I need a water softener in 81301?

At 113 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 81301 safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve 81301?

Zip code 81301 in Durango, Colorado is served by 24 water systems.

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