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City water profile

Whitmore Lake water quality

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

Median indexed hardness

374PPM

One indexed ZIP

Range 373.5–373.5 PPM

State comparison
91 PPM above
State hardness rank
#100 of 374
Matched utilities
3
Active health records
0

City summary

What the indexed records say

Whitmore Lake has 1 published ZIP profile across Washtenaw County. The indexed median is 374 PPM, compared with 283 PPM across Michigan.

Among the 374 Michigancities with an indexed median, Whitmore Lake ranks #100from 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
4.6 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jun 20, 2016 to Oct 11, 2023.

ZIP directory

Water reports in Whitmore Lake

Open a ZIP for site-level provenance and measurements.

ZIP code

48189

Very Hard

373.5 PPM

Nearest site
4.6 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Westbrook Apartments

PWSID MI0007035

Groundwater
System population served
330
Last reported
Jun 23, 2026

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

Harbor Cove Apartments

PWSID MI0003001

Groundwater
System population served
288
Last reported
Jun 23, 2026

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

Village At Eagle Gardens

PWSID MI0007099

Groundwater
System population served
193
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
Consumer Confidence RuleMI0007035Jul 1, 2025Resolved
Public NoticeMI0007099Jan 19, 2025Resolved
Public NoticeMI0007035Jan 9, 2025Unaddressed
NitrateMI0007035Jan 1, 2025Resolved
NitrateMI0007099Jan 1, 2025Resolved
LEAD AND COPPER RULE REVISIONSMI0007035Oct 17, 2024Resolved · health-based
LEAD AND COPPER RULE REVISIONSMI0007035Oct 17, 2024Resolved
LEAD AND COPPER RULE REVISIONSMI0007099Oct 17, 2024Resolved · health-based
LEAD AND COPPER RULE REVISIONSMI0007099Oct 17, 2024Resolved
Public NoticeMI0007099Oct 28, 2023Resolved

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 Whitmore Lake

Is the water hard?

The indexed city median is 374 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.