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City water profile

Galesburg water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Galesburg, Illinois.

Median indexed hardness

279PPM

2 indexed ZIPs

Range 277.5–281 PPM

State comparison
6 PPM below
State hardness rank
#553 of 913
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Galesburg has 2 published ZIP profiles across Knox County. The indexed median is 279 PPM, compared with 285 PPM across Illinois.

Among the 913 Illinoiscities with an indexed median, Galesburg ranks #553from highest to lowest. Across all 1,065 state ZIP profiles, available estimates run from 115to 408 PPM.

The 277.5–281 PPM range shows how much the available ZIP estimates vary within the city label.

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
14 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 2Low: 0

Observation window: May 22, 2017 to Jul 30, 2025.

ZIP directory

Water reports in Galesburg

Open a ZIP for site-level provenance and measurements.

ZIP code

61401

Very Hard

277.5 PPM

Nearest site
14 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

61402

Very Hard

281 PPM

Nearest site
12.9 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Galesburg

PWSID IL0950200

Groundwater
System population served
31,620
Last reported
May 27, 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.

No violation records are included in the current lookback window.

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 Galesburg

Is the water hard?

The indexed city median is 279 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.