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Water Hardness in 82644

Mills, Wyoming · Natrona County

138 PPM
8.1 GPG
Moderately Hard
0Soft60120180300+
Verified - Annual Water Quality Report

Dataset updated March 9, 2026Matched to 7 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 7 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
1 verified treated-water source
7 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 82644

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.

7 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.
Casper, City Of
WY5601415
Moderately Hard
120 PPMsurface water59,000 servedVerified - Annual Water Quality Report
Source water: 167 PPM
Mills, City Of
WY5600036
Very Hard
262 PPMsurface water4,050 servedHigh Confidence - USGS Monitoring
Bar Nunn, Town Of
WY5600067
Very Hard
262 PPMsurface water4,000 servedEstimated - Nearby Data
Pioneer Water & Sewer District
WY5600828
Moderately Hard
167 PPMsurface water1,500 servedEstimated - Nearby Data
Thirty-Three Mile Road I&S District
WY5601579
Very Hard
262 PPMsurface water200 servedHigh Confidence - USGS Monitoring
Showing the first 5 systems. Expand to review all matched systems.

Nearby Zip Codes

82609120826361228260112082604120

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 Mills, WY (82644).

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Frequently Asked Questions

Is the water hard in Mills, WY (82644)?

The average water hardness in 82644 is 138 PPM (8.1 GPG), which is classified as moderately hard.

Do I need a water softener in 82644?

With hardness of 138 PPM, a water softener is worth considering for homes in 82644.

Is hard water in 82644 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 82644?

Zip code 82644 in Mills, Wyoming is served by 7 water systems.

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