The average home water bill in Illinois is $28 per month — that's 38% below the U.S. average of $45, the 44th least expensive of 51 states.
| Illinois average | $28 per month |
|---|---|
| U.S. average | $45 per month |
| Difference | −38% (−$17/yr) |
| Rank (most expensive) | 44th of 51 |
Illinois ranks 44th of 51 for water bill cost. It stays lower thanks to abundant local supply and lower utility rates. Your own bill still depends on your home size, your usage, and which providers serve your address — so it pays to know where your state stands before you call to negotiate.
Your state's full breakdown plus the easiest ways to lower your bill. Free, no obligation.
The levers that move your bill the most: fixing leaks and running toilets; low-flow showerheads and faucet aerators; watering the lawn early or late to cut waste; a high-efficiency washer and dishwasher. Most cost little or nothing to start, and they stack — knock out two or three and the monthly savings add up fast.
Get the Free Illinois Water Bill Report →The average home water bill in Illinois is about $28 per month as of 2026 — 38% below the national average of $45 per month. Your actual bill depends on your home, your usage, and which providers serve your address.
Illinois ranks 44th out of 51 for water bill cost. Bills run lower thanks to abundant local supply and lower utility rates.
The fastest levers: fixing leaks and running toilets, low-flow showerheads and faucet aerators, watering the lawn early or late to cut waste. Most of these cost little or nothing to start.