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City water profile

Grand Rapids water quality

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

Median indexed hardness

392PPM

5 indexed ZIPs

Range 392–392 PPM

State comparison
109 PPM above
State hardness rank
#53 of 374
Matched utilities
2
Active health records
0

City summary

What the indexed records say

Grand Rapids has 5 published ZIP profiles across Kent County. The indexed median is 392 PPM, compared with 283 PPM across Michigan.

Among the 374 Michigancities with an indexed median, Grand Rapids ranks #53from highest to lowest. Across all 512 state ZIP profiles, available estimates run from 41.3to 459.5 PPM.

The 392–392 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 hard5 ZIPs

5 of 5 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
47.6 miles
Profiles with evidence
5/5

Confidence labels

High: 0Moderate: 0Low: 5

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

ZIP directory

Water reports in Grand Rapids

Open a ZIP for site-level provenance and measurements.

ZIP code

49503

Very Hard

392 PPM

Nearest site
47.6 mi
Confidence
Low

View full ZIP evidence →

ZIP code

49504

Very Hard

392 PPM

Nearest site
49.2 mi
Confidence
Low

View full ZIP evidence →

ZIP code

49505

Very Hard

392 PPM

Nearest site
49.9 mi
Confidence
Low

View full ZIP evidence →

ZIP code

49506

Very Hard

392 PPM

Nearest site
46.3 mi
Confidence
Low

View full ZIP evidence →

ZIP code

49507

Very Hard

392 PPM

Nearest site
45.4 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Grand Rapids

PWSID MI0002790

Surface water
System population served
306,901
Last reported
Jun 23, 2026

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

Corewellhealth Gr Kalamazoo

PWSID MI0070017

Surface water
System population served
165
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
Public NoticeMI0070017Aug 5, 2024Resolved
Lead and Copper RuleMI0070017Jul 1, 2023Resolved
Revised Total Coliform RuleMI0070017Dec 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 Rapids

Is the water hard?

The indexed city median is 392 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.