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Water Hardness in Kankakee, IL

Illinois · 1 zip codes · 25 matched water systems

206 PPM
12 GPG
Hard
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 202625 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

Source context

How this city reading is built

This city reading is a weighted rollup across 25 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
23 USGS-backed sources
25 matched systems total for this city; USGS monitoring is used where treated-water reports are unavailable.
Water source profile
Primarily surface water
Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.
Data recency
March 9, 2026
Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems in Kankakee

These systems are matched to Kankakee, IL. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

25 water systems
PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.
Aqua Illinois-Kankakee
IL0915030
Hard
206 PPMsurface water80,000 servedHigh Confidence — USGS Monitoring
Aqua Illinois-North Maine Utilities
IL0315350
Hard
206 PPMsurface water30,043 servedHigh Confidence — USGS Monitoring
Aqua Illinois-University Park
IL1975030
Hard
206 PPMsurface water7,002 servedHigh Confidence — USGS Monitoring
Aqua Illinois-Candlewick Dvn
IL0075050
Hard
206 PPMgroundwater6,426 servedHigh Confidence — USGS Monitoring
Aqua Illinois-Hawthorn Woods
IL0975040
Hard
206 PPMgroundwater3,065 servedHigh Confidence — USGS Monitoring
Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Kankakee, IL

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

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If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Kankakee, IL.

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Frequently Asked Questions

How hard is the water in Kankakee, IL?

The citywide weighted average water hardness in Kankakee, IL is 206 PPM (12 GPG), classified as hard. This is based on 25 matched water systems.

Do I need a water softener in Kankakee, IL?

With a citywide average hardness of 206 PPM, a water softener is recommended for homes in Kankakee. Confirm your tap reading before sizing equipment.

Is hard water in Kankakee, IL safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve Kankakee, IL?

Kankakee, Illinois is served by 25 matched water systems across 1 zip code.

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