Where does the water in 81631 come from?

Water for zip code 81631 in Eagle, Colorado is provided by 4 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 81631

Eagle, Colorado · Eagle County

212 PPM

12.4 GPG

Hard

0Soft60120180300+

High Confidence - USGS Monitoring

Dataset updated March 9, 2026Matched to 4 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 4 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

3 USGS-backed sources

4 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 81631

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.

4 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.

Water System	Source	Hardness	Pop. Served	Data Source
Eagle River Wsd CO0119802	surface water	202 PPM Hard	51,515	Estimated - County Avg
Gypsum Town Of CO0119329	surface water	147 PPM Moderately Hard	15,272	High Confidence - USGS Monitoring
Eagle Town Of CO0119233	surface water	408 PPM Very Hard	7,511	High Confidence - USGS Monitoring
Green Acres Mhp CO0119321	surface water	408 PPM Very Hard	130	High Confidence - USGS Monitoring

Eagle River Wsd

CO0119802

Hard

202 PPMsurface water51,515 servedEstimated - County Avg

Gypsum Town Of

CO0119329

Moderately Hard

147 PPMsurface water15,272 servedHigh Confidence - USGS Monitoring

Eagle Town Of

CO0119233

Very Hard

408 PPMsurface water7,511 servedHigh Confidence - USGS Monitoring

Green Acres Mhp

CO0119321

Very Hard

408 PPMsurface water130 servedHigh Confidence - USGS Monitoring

Nearby Zip Codes

81632189 81655189 81620189 81621237 80423189 81645187 81637189 80426189 81657189 8165644 8164244 80463189

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.

Methodology Data sources How 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 Eagle, CO (81631).

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Frequently Asked Questions

Is the water hard in Eagle, CO (81631)?

The average water hardness in 81631 is 212 PPM (12.4 GPG), which is classified as hard.

Do I need a water softener in 81631?

With hardness of 212 PPM, a water softener is recommended for homes in 81631.

Is hard water in 81631 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 81631?

Zip code 81631 in Eagle, Colorado is served by 4 water systems.