Municipal Department
City of Saint Charles Utilities Division - Water and Sewer
Serving Saint Charles city and Saint Charles County water/sewer service areas
Population served
78,961 people (EPA CWS estimate for St. Charles PWS)
State system code
FIPS 29
Billing frequency
Bi-monthly; Saint Charles sends water and sewer bills approximately every two months and reads water meters every two months.
Provider briefing
How this utility’s billing works
City of Saint Charles Utilities Division - Water and Sewer operates as a municipal department serving Saint Charles city and Saint Charles County water/sewer service areas. Customers should use the provider’s current account-specific bill and official customer-service instructions as the final authority for deadlines, balances, and service requests.
The published water-rate framework is described as Increasing block tiers by bi-monthly usage. Effective January 1, 2026 for city residents, the water bi-monthly charge is $8.24, with $5.11 per 1,000 gallons for 0–7,900 gallons, $5.48 for 8,000–25,900, and $5.93 above 26,000 gallons. County residents use a separate $9.89 base and $8.35/$8.94/$9.67 tier schedule.. Bills are generated bi-monthly; saint charles sends water and sewer bills approximately every two months and reads water meters every two months., and a typical residential cost reference is Approximately $97.02 per month for a city resident using 6,000 gallons per month, calculated over a two-month bill: water $8.24 + 12,000 gallons at $5.11 per 1,000 ($69.56), plus residential sewer $14.07 + a 12,000-gallon winter-average allocation at $9.20 per 1,000 ($110.40), totaling $194.03 bi-monthly or $97.02 monthly. Actual sewer usage is based on the winter average and city/county territory.. These descriptions are useful planning benchmarks; actual charges can change with meter size, usage, sewer averaging, local taxes, drought stages, or account-specific fees.
Wastewater and sewer calculation
Residential sanitary sewer is based on the winter water average from meter readings between December 1 of the prior year and April 30 of the current year. The average is reevaluated each spring and takes effect with the first billing after July 1. City residential sewer is $14.07 bi-monthly plus $9.20 per 1,000 gallons; commercial, industrial, governmental, and nonprofit accounts are billed on actual water usage each billing.
Meter and infrastructure notes
Water meters are read every two months, with billing cycles divided into routes. City records describe a conversion to automatic meter reading and 2026 agenda material references Neptune RF meters, but the reviewed current rate page does not state a transmission interval; the operational schedule remains bi-monthly reads and bills.
Emergency water support
Report a leak or water emergency
636-255-6115 for after-hours Public Works emergencies; regular Public Works is 636-949-3363 and water/sewer billing is 636-949-3212. The City does not identify a separate 24/7 water-only hotline on the reviewed pages.
Official starting point
Choose the right next step
Reading this profile
A practical reference for Saint Charles city and Saint Charles County water/sewer service areas
City of Saint Charles Utilities Division - Water and Sewer is listed here as a municipal department. The profile separates account actions—such as paying a bill or requesting service—from explanatory material about rates, meters, wastewater, leaks, and delinquency.
Because utility rules can vary by account class, meter size, service address, billing date, and local ordinance, treat the published bill and current provider website as the final authority. Use this profile to locate the correct channel and prepare better questions for customer service.
If your issue is urgent, start with the provider’s emergency number or official payment route rather than waiting for an email response. Keep a written record of calls, confirmation numbers, notice dates, and documents you submit.