Municipal Department
ANN ARBOR
Serving ANN ARBOR
Population served
123851 people (EPA SDWIS 2026Q2 active CWS estimate for MI0000220)
State system code
FIPS 26
Billing frequency
Quarterly for the vast majority of residential water customers.
Provider briefing
How this utility’s billing works
ANN ARBOR operates as a municipal department serving ANN ARBOR. 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 quarterly block tiers: 1-9 CCF $2.86/CCF, 10-18 CCF $4.58, 19-36 CCF $10.61, and over 36 CCF $22.76, plus a fixed water customer charge. Rates effective July 1, 2026.. Bills are generated quarterly for the vast majority of residential water customers., and a typical residential cost reference is Approx. $40.41/month before the 10% on-time discount for a standard residential meter using 5,000 gallons/month, calculated from the July 1, 2026 water charge of $33.75/quarter, sewer charge of $6.92/CCF plus $17.44/quarter, stormwater charge of $4.67/quarter, and 5,000 gallons ≈ 6.684 CCF. Actual bills vary with sewer averaging and property-specific stormwater fees.. 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
Sewer is $6.92/CCF plus a $17.44 quarterly sewer customer charge. Summer sewer is based on winter water use, so irrigation does not automatically increase the sewer component in the same way. Stormwater adds $4.67/quarter plus a property-specific discharge fee.
Meter and infrastructure notes
Ann Arbor has used advanced metering infrastructure for more than 15 years. RF meter transmitter units communicate wirelessly, provide daily usage and leak alerts, and feed AquaHawk. The opt-out material lists $132 one-time relocation, or $252 setup plus $66 quarterly manual reading for removal/display alternatives; a standard reading date was not stated.
Emergency water support
Report a leak or water emergency
734-794-6333 during normal handling; 734-794-6426 for urgent water issues after hours.
Official starting point
Choose the right next step
Reading this profile
A practical reference for ANN ARBOR
ANN ARBOR 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.