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City water profile

Marseilles water quality

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

Median indexed hardness

319PPM

One indexed ZIP

Range 319–319 PPM

State comparison
34 PPM above
State hardness rank
#198 of 913
Matched utilities
2
Active health records
1

City summary

What the indexed records say

Marseilles has 1 published ZIP profile across Lasalle County. The indexed median is 319 PPM, compared with 285 PPM across Illinois.

Among the 913 Illinoiscities with an indexed median, Marseilles ranks #198from highest to lowest. Across all 1,065 state ZIP profiles, available estimates run from 115to 408 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
13.4 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: May 30, 2017 to Aug 21, 2023.

ZIP directory

Water reports in Marseilles

Open a ZIP for site-level provenance and measurements.

ZIP code

61341

Very Hard

319 PPM

Nearest site
13.4 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Marseilles

PWSID IL0990500

Groundwater
System population served
5,061
Last reported
May 27, 2026

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

Four Star Campground

PWSID IL0990060

Groundwater
System population served
250
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

1 unique active health-based record appears among associated systems. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Public NoticeIL0990500Aug 22, 2025Unaddressed
LEAD AND COPPER RULE REVISIONSIL0990500Jul 2, 2025Unaddressed
LEAD AND COPPER RULE REVISIONSIL0990500Oct 17, 2024Resolved
LEAD AND COPPER RULE REVISIONSIL0990500Oct 17, 2024Unaddressed · health-based
Consumer Confidence RuleIL0990500Jul 1, 2024Resolved
Consumer Confidence RuleIL0990500Jul 1, 2023Resolved
TTHMIL0990500Oct 1, 2021Resolved
Total Haloacetic Acids (HAA5)IL0990500Oct 1, 2021Resolved
Combined Radium (-226 and -228)IL0990060Jan 1, 2021Resolved
Public NoticeIL0990060Oct 13, 2018Unaddressed

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 Marseilles

Is the water hard?

The indexed city median is 319 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.