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Water Hardness in 48880

Saint Louis, Michigan · Gratiot County

149 PPM
8.7 GPG
Moderately Hard
0Soft60120180300+
Estimated - Nearby Data

Dataset updated March 9, 2026Matched to 3 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 3 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 estimated sources
This ZIP reading needs local confirmation before equipment sizing or purchase decisions.
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 48880

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.

3 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.
St. Louis, City Of
MI0006320
Moderately Hard
140 PPMsurface water6,976 servedEstimated - Nearby Data
Nesen'S Countryside Acres
MI0040637
Very Hard
769 PPMgroundwater95 servedEstimated - Nearby Data
Gratiot Area Water Authority
MI0002836
Moderately Hard
140 PPMsurface water0 servedEstimated - Nearby Data

Nearby Zip Codes

486157694880158748883661486621604883216048847769486371864887716048640141488586574888916048896655

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 Saint Louis, MI (48880).

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Frequently Asked Questions

Is the water hard in Saint Louis, MI (48880)?

Our estimate for 48880 is 149 PPM (8.7 GPG), but it is based on nearby, county, or state-level data rather than a direct treated tap-water report for this exact location. Confirm with your utility or a home test.

Do I need a water softener in 48880?

Do not size a softener from this estimate alone. Confirm the actual tap-water hardness before choosing treatment equipment.

Is hard water in 48880 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 48880?

Zip code 48880 in Saint Louis, Michigan is served by 3 water systems.

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