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Water Hardness in Eldorado Springs, CO

Colorado · 1 zip codes · 9 matched water systems

90 PPM
5.3 GPG
Slightly Hard
0Soft60120180300+
Verified — Annual Water Quality Report

City avg (weighted): 90 PPM

Dataset updated March 9, 20269 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading
Boulder City Of
CO0107152
Water source: surface water
Serves: 166,080
USGS environmental estimate: 151 PPM
Source context

How this city reading is built

This city reading is a weighted rollup across 9 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
9 verified treated-water sources
9 matched systems total for this city; treated-water reports are prioritized when available.
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 in Eldorado Springs

These systems are matched to Eldorado Springs, CO. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

9 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.
Boulder City Of
CO0107152
Slightly Hard
90 PPMsurface water166,080 servedVerified — Annual Water Quality Report
Source water: 151 PPM
Longmont City Of
CO0107485
Slightly Hard
90 PPMsurface water102,866 servedVerified — Annual Water Quality Report
Source water: 165 PPM
Erie Town Of
CO0162255
Slightly Hard
90 PPMsurface water40,061 servedVerified — Annual Water Quality Report
Source water: 158 PPM
Lafayette City Of
CO0107473
Slightly Hard
90 PPMsurface water28,700 servedVerified — Annual Water Quality Report
Source water: 158 PPM
Louisville City Of
CO0107487
Slightly Hard
90 PPMsurface water20,975 servedVerified — Annual Water Quality Report
Source water: 151 PPM
Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Eldorado Springs, CO

8002590

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Slightly Hard Water

Your water is slightly hard. You may notice minor spotting on dishes or a slight film on faucets. A water softener is optional but can improve water quality.

Recommended Products

Water Hardness Test Kit
Our PickVarify (150 Strips)Also GreatJNW Direct (150 Strips)
Salt-Free Water Conditioner
Our PickSpringWell Salt-Free Cartridge

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | 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 Eldorado Springs, CO.

Submit Your Data

Frequently Asked Questions

How hard is the water in Eldorado Springs, CO?

The citywide weighted average water hardness in Eldorado Springs, CO is 90 PPM (5.3 GPG), classified as slightly hard. This is based on 9 matched water systems.

Do I need a water softener in Eldorado Springs, CO?

At 90 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Eldorado Springs, CO 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 Eldorado Springs, CO?

Eldorado Springs, Colorado is served by 9 matched water systems across 1 zip code.

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