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Water Hardness in 48604

Saginaw, Michigan · Saginaw County

187 PPM
10.9 GPG
Hard
0Soft60120180300+
Verified - Utility Reported

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 48604

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.
Saginaw, City Of
MI0005850
Slightly Hard
104 PPMsurface water44,058 servedVerified - Utility Reported
Source water: 230 PPM
Saginaw Charter Township
MI0005860
Hard
230 PPMsurface water40,840 servedHigh Confidence - USGS Monitoring
Thomas Township
MI0006580
Hard
230 PPMsurface water11,931 servedHigh Confidence - USGS Monitoring
Bridgeport Township
MI0000840
Very Hard
270 PPMsurface water10,104 servedEstimated - Nearby Data
Carrollton Township
MI0001160
Hard
230 PPMsurface water6,103 servedHigh Confidence - USGS Monitoring
Showing the first 5 systems. Expand to review all matched systems.

Nearby Zip Codes

487241824860318348607183486021834870623048708230486011874862318748609183487472304861123048732230

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 Saginaw, MI (48604).

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Frequently Asked Questions

Is the water hard in Saginaw, MI (48604)?

The average water hardness in 48604 is 187 PPM (10.9 GPG), which is classified as hard.

Do I need a water softener in 48604?

With hardness of 187 PPM, a water softener is recommended for homes in 48604.

Is hard water in 48604 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 48604?

Zip code 48604 in Saginaw, Michigan is served by 7 water systems.

Learn More About Your Water

How to Test Water Hardness at Home

Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.

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Water Hardness Scale: PPM and GPG Chart

Use the USGS water hardness scale to compare PPM, GPG, and mg/L levels from soft to very hard water.

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Well Water Hardness: Why It's Usually Hard & How to Treat It

Well water is almost always harder than city water. Learn why, how to test your well, and the best treatment options for hard well water.

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