Municipal Department
City of Rapid City Water Service Department / Utility Billing
Serving Rapid City
Population served
Approximately 72,009 residents in the queue estimate; the City reports more than 27,900 accounts billed for water, sewer and related municipal services.
State system code
FIPS 46
Billing frequency
Monthly. Billing zones generate bills on the first, second, third or fourth Monday of the month, depending on the service zone; no bills are generated on a fifth Monday.
Provider briefing
How this utility’s billing works
City of Rapid City Water Service Department / Utility Billing operates as a municipal department serving Rapid City. 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 Meter-size fixed demand charge plus increasing-block water commodity rates and state environmental surcharge. A unit equals 100 cubic feet, approximately 748 gallons. For single-family residential users in 2026, water commodity tiers are $6.29 per unit for 1-10 units, $6.72 for 11-25, $7.62 for 25-50 and $8.72 for 50 and above, with the meter demand charge added.. Bills are generated monthly. billing zones generate bills on the first, second, third or fourth monday of the month, depending on the service zone; no bills are generated on a fifth monday., and a typical residential cost reference is The City publishes a 2026 water schedule and a 2026 sewer schedule rather than a single estimate. At 5,000 gallons, or about 6.68 units, a 5/8-inch account falls in the first water tier; sewer uses the December-January-February winter average and the 2026 sewer rate of $6.18 per unit plus a small-meter demand charge. A typical combined water/sewer bill should be estimated from the account's meter size and winter average rather than a universal flat amount.. 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 sewer equals the 2026 sewer use charge of $6.18 per 100-cubic-foot unit multiplied by the winter-average number of units, plus a meter demand charge. The winter average uses December, January and February water use when outdoor watering is minimal; the resulting sewer basis is then applied to later bills. Commercial sewer uses monthly metered water rather than the residential winter average.
Meter and infrastructure notes
Rapid City uses remote-read meters with electronic devices that transmit readings to Utility Billing. Residential water is read monthly; the system's portal shows account history, and the 2026 rate schedule is based on monthly readings or estimates. The City does not state an hourly transmission interval.
Emergency water support
Report a leak or water emergency
605-394-4125 for Utility Billing and water-service assistance. The City Water Division directs customers to report suspected water-main breaks or line leaks through its water-division contact system; after-hours emergency routing should begin through the City service line.
Official starting point
Choose the right next step
Reading this profile
A practical reference for Rapid City
City of Rapid City Water Service Department / Utility Billing 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.