Darien water and sewer rates
At typical use (9 units, about 6,700 gallons a month), a Darien house pays about $78 a month for water and about $33 for sewer: about $1,340 a year. Estimated from public rates, not anyone's actual bill.
Who supplies water to Darien houses, what it costs, and how the sewer charge works.
Pay or manage it
City of Darien
Residents inside the city pay $10.50 per 1,000 gallons, effective with the May 2025 billing cycle.
| Use a month | Price per 1,000 gallons |
|---|---|
| Fixed charge | $7.50 a month |
| 0 to more | $10.50 |
Sewer
DuPage County sewer charge is $4.33 per 1,000 gallons of water consumption and the base charge is $8.13 per bill; county bills are generated every other month.
Sources
- DuPage County sewer billing
- Darien water rate FAQ
- Darien May 2025 newsletter: new water rates
- Darien water code 6C-4-7
Checked October 30, 2026. Every number here comes from the public sources listed, matched by our checker.
Rates change every year; this page shows when it was last checked. Nothing here is legal, tax or insurance advice.
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