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Water Hardness in Coloma, MI

Michigan · 1 zip codes · 7 matched water systems

247 PPM
14.4 GPG
Hard
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 20267 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

Source context

How this city reading is built

This city reading is a weighted rollup across 7 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
7 USGS-backed sources
7 matched systems total for this city; 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 in Coloma

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

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.
Southwest Michigan Regional Sanitary Sew
MI0003726
Very Hard
260 PPMsurface water26,780 servedHigh Confidence — USGS Monitoring
Niles
MI0004740
Very Hard
263 PPMgroundwater14,215 servedHigh Confidence — USGS Monitoring
Andrews University
MI0000210
Slightly Hard
108 PPMgroundwater3,000 servedHigh Confidence — USGS Monitoring
Coloma
MI0001530
Hard
195 PPMgroundwater1,555 servedHigh Confidence — USGS Monitoring
Coloma Township
MI0001535
Hard
195 PPMgroundwater1,425 servedHigh Confidence — USGS Monitoring
Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Coloma, MI

What This Means For You

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

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If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Coloma, MI.

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Frequently Asked Questions

How hard is the water in Coloma, MI?

The citywide weighted average water hardness in Coloma, MI is 247 PPM (14.4 GPG), classified as hard. This is based on 7 matched water systems.

Do I need a water softener in Coloma, MI?

With a citywide average hardness of 247 PPM, a water softener is recommended for homes in Coloma. Confirm your tap reading before sizing equipment.

Is hard water in Coloma, MI 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 Coloma, MI?

Coloma, Michigan is served by 7 matched water systems across 1 zip code.

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