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City water profile

Monroe water quality

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

Median indexed hardness

228PPM

2 indexed ZIPs

Range 228–228 PPM

State comparison
55 PPM below
State hardness rank
#264 of 374
Matched utilities
4
Active health records
0

City summary

What the indexed records say

Monroe has 2 published ZIP profiles across Monroe County. The indexed median is 228 PPM, compared with 283 PPM across Michigan.

Among the 374 Michigancities with an indexed median, Monroe ranks #264from highest to lowest. Across all 512 state ZIP profiles, available estimates run from 41.3to 459.5 PPM.

The 228–228 PPM range shows how much the available ZIP estimates vary within the city label. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard2 ZIPs

2 of 2 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
35 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 0Low: 2

Observation window: Jan 7, 2016 to Jun 9, 2026.

ZIP directory

Water reports in Monroe

Open a ZIP for site-level provenance and measurements.

ZIP code

48161

Very Hard

228 PPM

Nearest site
30.7 mi
Confidence
Low

View full ZIP evidence →

ZIP code

48162

Very Hard

228 PPM

Nearest site
35 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Monroe

PWSID MI0004450

Surface water
System population served
49,467
Last reported
Jun 23, 2026

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

Monroe South County

PWSID MI0004455

Surface water
System population served
33,816
Last reported
Jun 23, 2026

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

Frenchtown Township

PWSID MI0002500

Surface water
System population served
21,609
Last reported
Jun 23, 2026

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

Bedford Meadows

PWSID MI0006435

Groundwater
System population served
156
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
Total Haloacetic Acids (HAA5)MI0002500Apr 1, 2024Resolved
cis-1,2-DichloroethyleneMI0002500Apr 1, 2024Resolved
Xylenes, TotalMI0002500Apr 1, 2024Resolved
DICHLOROMETHANEMI0002500Apr 1, 2024Resolved
p-DichlorobenzeneMI0002500Apr 1, 2024Resolved
1,1-DichloroethyleneMI0002500Apr 1, 2024Resolved
trans-1,2-DichloroethyleneMI0002500Apr 1, 2024Resolved
1,2-DichloroethaneMI0002500Apr 1, 2024Resolved
1,1,1-TrichloroethaneMI0002500Apr 1, 2024Resolved
Carbon tetrachlorideMI0002500Apr 1, 2024Resolved

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 Monroe

Is the water hard?

The indexed city median is 228 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.