Skip to content

City water profile

Du Quoin water quality

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

Median indexed hardness

253PPM

One indexed ZIP

Range 253–253 PPM

State comparison
32 PPM below
State hardness rank
#694 of 913
Matched utilities
2
Active health records
1

City summary

What the indexed records say

Du Quoin has 1 published ZIP profile across Perry County. The indexed median is 253 PPM, compared with 285 PPM across Illinois.

Among the 913 Illinoiscities with an indexed median, Du Quoin ranks #694from 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. 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 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
41.4 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Jan 5, 2016 to May 28, 2026.

ZIP directory

Water reports in Du Quoin

Open a ZIP for site-level provenance and measurements.

ZIP code

62832

Very Hard

253 PPM

Nearest site
41.4 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Duquoin

PWSID IL1450100

Surface water
System population served
7,169
Last reported
May 27, 2026

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

Crossroads Mhp

PWSID IL1450260

Surface water
System population served
53
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
Lead and Copper RuleIL1450100Jan 1, 2026Unaddressed
Public NoticeIL1450100Aug 22, 2025Resolved
LEAD AND COPPER RULE REVISIONSIL1450100Jul 2, 2025Resolved
Revised Total Coliform RuleIL1450100Jul 1, 2025Resolved
ChloramineIL1450100Jul 1, 2025Resolved
LEAD AND COPPER RULE REVISIONSIL1450100Oct 17, 2024Unaddressed · health-based
TTHMIL1450100Jul 1, 2023Resolved
Total Haloacetic Acids (HAA5)IL1450100Jul 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 Du Quoin

Is the water hard?

The indexed city median is 253 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.