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Water Hardness in 80534

Johnstown, Colorado · Weld County

80 PPM
4.7 GPG
Slightly Hard
0Soft60120180300+
Verified — Annual Water Quality Report

Dataset updated March 9, 2026Matched to 10 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 10 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
10 verified treated-water sources
10 matched systems total for this ZIP; 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 Serving 80534

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.

10 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.
Greeley City Of
CO0162321
Slightly Hard
80 PPMsurface water132,310 servedVerified — Annual Water Quality Report
Source water: 162 PPM
Firestone Town Of
CO0162476
Slightly Hard
80 PPMsurface water27,798 servedVerified — Annual Water Quality Report
Source water: 158 PPM
Johnstown Town Of
CO0162418
Slightly Hard
80 PPMsurface water24,725 servedVerified — Annual Water Quality Report
Source water: 165 PPM
Windsor Town Of
CO0162843
Slightly Hard
80 PPMsurface water23,500 servedVerified — Annual Water Quality Report
Source water: 230 PPM
Evans City Of
CO0162260
Slightly Hard
80 PPMsurface water19,369 servedVerified — Annual Water Quality Report
Source water: 162 PPM
Showing the first 5 systems. Expand to review all matched systems.

Nearby Zip Codes

805439480542808062382806348080651858051380805508380528808062081805048080547808053780

What This Means For You

Recommendations are based on the displayed ZIP 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 Johnstown, CO (80534).

Submit Your Data

Frequently Asked Questions

Is the water hard in Johnstown, CO (80534)?

The average water hardness in 80534 is 80 PPM (4.7 GPG), which is classified as slightly hard.

Do I need a water softener in 80534?

At 80 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 80534 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 80534?

Zip code 80534 in Johnstown, Colorado is served by 10 water systems.

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