St. Charles water and sewer rates
At typical use (9 units, about 6,700 gallons a month), a St. Charles house pays about $40 a month for water and about $69 for sewer: about $1,300 a year. Estimated from public rates, not anyone's actual bill.
Who supplies water to St. Charles houses, what it costs, and how the sewer charge works.
City of Saint Charles water
City resident rates effective January 1, 2026.
| Use a month | Price per 1,000 gallons |
|---|---|
| Fixed charge | $4.12 a month |
| 0 to 3.95 thousand gallons | $5.11 |
| 3.95 to 12.95 thousand gallons | $5.48 |
| 12.95 to more | $5.93 |
- Source
- The 2025 water quality report lists wells 4, 5, 6 and 7 as ground water sources.
- Purchased water
- The report says drinking water is also supplied from the St. Louis City system.
- Lead
- The 2022-2024 lead 90th percentile result was 0 ppb; the action level is 15 ppb.
Sewer
Residential sewer charges are based on winter water average consumption from meter readings between December 1 of the previous year through April 30 th of the current year.
Sources
Checked October 31, 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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