Skip to content

City water profile

Carbondale water quality

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

Median indexed hardness

165PPM

3 indexed ZIPs

Range 155–177 PPM

State comparison
120 PPM below
State hardness rank
#892 of 913
Matched utilities
3
Active health records
0

City summary

What the indexed records say

Carbondale has 3 published ZIP profiles across Jackson County and Williamson County. The indexed median is 165 PPM, compared with 285 PPM across Illinois.

Among the 913 Illinoiscities with an indexed median, Carbondale ranks #892from highest to lowest. Across all 1,065 state ZIP profiles, available estimates run from 115to 408 PPM.

The 155–177 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
Hard3 ZIPs
Very hard0 ZIPs

3 of 3 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
34.3 miles
Profiles with evidence
3/3

Confidence labels

High: 0Moderate: 0Low: 3

Observation window: Jan 4, 2016 to May 28, 2026.

ZIP directory

Water reports in Carbondale

Open a ZIP for site-level provenance and measurements.

ZIP code

62901

Hard

177 PPM

Nearest site
38.6 mi
Confidence
Low

View full ZIP evidence →

ZIP code

62902

Hard

155 PPM

Nearest site
34.3 mi
Confidence
Low

View full ZIP evidence →

ZIP code

62903

Hard

164.5 PPM

Nearest site
33 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Carbondale

PWSID IL0770150

Surface water
System population served
22,107
Last reported
May 27, 2026

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

Crab Orchard Estates

PWSID IL0775160

Surface water
System population served
238
Last reported
May 27, 2026

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

Evergreen Wildwood Mobile Home Park

PWSID IL0775410

Surface water
System population served
230
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.

RecordSystemPeriodStatus
Long Term 2 Enhanced Surface Water Treatment RuleIL0770150Dec 1, 2025Archived · health-based
Long Term 2 Enhanced Surface Water Treatment RuleIL0775410Dec 1, 2025Archived · health-based
Lead and Copper RuleIL0775410Oct 1, 2025Unaddressed
LEAD AND COPPER RULE REVISIONSIL0775160Jul 2, 2025Unaddressed
LEAD AND COPPER RULE REVISIONSIL0775160Oct 17, 2024Resolved · health-based
Public NoticeIL0775410Oct 7, 2024Resolved
Public NoticeIL0770150Aug 27, 2024Resolved
CARBON, TOTALIL0770150Jul 1, 2024Resolved
CARBON, TOTALIL0770150Jul 1, 2024Resolved · health-based
CARBON, TOTALIL0770150Jul 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 Carbondale

Is the water hard?

The indexed city median is 165 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.