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City water profile

Grand Blanc water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Grand Blanc, Michigan.

Median indexed hardness

394PPM

One indexed ZIP

Range 394–394 PPM

State comparison
111 PPM above
State hardness rank
#41 of 374
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Grand Blanc has 1 published ZIP profile across Genesee County. The indexed median is 394 PPM, compared with 283 PPM across Michigan.

Among the 374 Michigancities with an indexed median, Grand Blanc ranks #41from highest to lowest. Across all 512 state ZIP profiles, available estimates run from 41.3to 459.5 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard1 ZIP

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
13 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jun 28, 2016 to Oct 11, 2023.

ZIP directory

Water reports in Grand Blanc

Open a ZIP for site-level provenance and measurements.

ZIP code

48439

Very Hard

394 PPM

Nearest site
13 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Grand Blanc, City Of

PWSID MI0002740

Groundwater
System population served
8,276
Last reported
Jun 23, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Revised Total Coliform RuleMI0002740Aug 1, 2022Resolved

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Grand Blanc

Is the water hard?

The indexed city median is 394 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.