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City water profile

Croswell water quality

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

Median indexed hardness

404PPM

One indexed ZIP

Range 404–404 PPM

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

City summary

What the indexed records say

Croswell has 1 published ZIP profile across Sanilac County. The indexed median is 404 PPM, compared with 283 PPM across Michigan.

Among the 374 Michigancities with an indexed median, Croswell ranks #15from 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
10 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Aug 3, 2016 to Sep 11, 2023.

ZIP directory

Water reports in Croswell

Open a ZIP for site-level provenance and measurements.

ZIP code

48422

Very Hard

404 PPM

Nearest site
10 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Croswell, City Of

PWSID MI0001690

Groundwater
System population served
2,447
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
NitrateMI0001690Jan 1, 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 Croswell

Is the water hard?

The indexed city median is 404 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.