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Kankakee, IL · 131,788 people served · EPA data 2021–2026

Tap water quality in Kankakee, Illinois

Kankakee's water systems logged 2 health-based EPA violations in 2021–2026, most recently in 2025 — a modest record, with interim enhanced surface water treatment rule the issue found. For context, Illinois's systems average 1.9 health-based violations each.

CFair
Kankakee water grade: C
Fair — our A–F grade from this city's EPA compliance record, relative to Illinois and the nation. How we grade →
Health-based violations, 2021–20262
Interim Enhanced Surface Water Treatment Rule1
Combined Radium (-226 And -228)1
Aqua Illinois-Kankakee80,000 served
Aqua Illinois-North Maine Utilities30,043 served
Aqua Illinois-Candlewick Dvn6,426 served
Aqua Illinois-Hawthorn Woods3,065 served
Illinois quality rank#46 / 51 (76.8/100)
Illinois avg hardness120 PPM (moderately hard)
Want to know what's actually in your Kankakee water?

Averages describe states, not your faucet. A certified home water test screens for lead, nitrates, bacteria and dozens of other contaminants — the same categories EPA regulates.

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Kankakee tap water FAQ

Is tap water safe to drink in Kankakee?

Kankakee's systems logged 2 health-based violations in 2021–2026, most commonly interim enhanced surface water treatment rule. A violation is a red flag for a period of time, not a permanent condition — your utility's current Consumer Confidence Report shows today's status, and a certified home test shows what's at your tap.

Who supplies Kankakee's water?

Aqua Illinois-Kankakee (serving about 80,000 people); Aqua Illinois-North Maine Utilities (serving about 30,043 people); Aqua Illinois-Candlewick Dvn (serving about 6,426 people); Aqua Illinois-Hawthorn Woods (serving about 3,065 people). Data: EPA Safe Drinking Water Information System, July 2026.

How hard is the water in Kankakee?

City-level hardness isn't published in a single federal dataset, but Illinois averages 120 PPM — "moderately hard" on the USGS scale. Your utility's water quality report lists Kankakee's exact hardness, or a $10 test strip tells you in a minute. If it comes back over 120 PPM, see our water softener guidance in the purification calculator.

Do I need a water filter in Kankakee?

With 2 health-based violations on record in 2021–2026, a certified filter is reasonable insurance here: reverse osmosis ($150–$1,300 installed, Angi 2026) covers lead, nitrates and PFAS at the tap. Test first ($50–$200) so you buy for what's actually present.

Want to know what's actually in your Kankakee water?

Averages describe states, not your faucet. A certified home water test screens for lead, nitrates, bacteria and dozens of other contaminants — the same categories EPA regulates.

Test your water at home

We may earn a commission if you request quotes through this link. It costs you nothing and never affects the data we publish.