Municipal Department
City of Naperville Water and Wastewater Utility
Serving Naperville, Illinois and unincorporated Naperville service areas
Population served
156,406 people (EPA SDWIS active CWS PWS IL0434670)
State system code
FIPS 17
Billing frequency
Monthly utility bills. The City’s eBill launch materials state that paperless customers receive a monthly email notification and PDF statement.
Provider briefing
How this utility’s billing works
City of Naperville Water and Wastewater Utility operates as a municipal department serving Naperville, Illinois and unincorporated Naperville 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 Fixed customer and capital charges plus volumetric water and wastewater charges. Wholesale DuPage Water Commission/City of Chicago costs pass through to customers; unincorporated customers pay a 30% surcharge on the listed water and monthly customer-service rates. The 2026 adopted schedule supports ongoing water-main and Springbrook treatment-plant improvements.. Bills are generated monthly utility bills. the city’s ebill launch materials state that paperless customers receive a monthly email notification and pdf statement., and a typical residential cost reference is Naperville defines its 2026 average residential combined water/wastewater bill as $118 per month for a customer using 750 cubic feet monthly, approximately 5,610 gallons. A 5,000-7,000 gallon household is therefore near the City’s published average benchmark, with the final amount varying by usage, fixed capital/phosphorus charges, wholesale pass-through, and incorporated versus unincorporated status.. 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
Naperville combines fixed user charges with volumetric wastewater charges based on water use. The bill can also include a phosphorus charge for Springbrook improvements and a water capital charge. The reviewed official page does not describe a winter-average formula.
Meter and infrastructure notes
Naperville’s Empower dashboard provides residential and commercial water-usage history, and the City states that non-wireless meter-alternative customers can use the dashboard with a one-month data delay because those meters receive monthly manual reads. The reviewed pages do not state the full AMI deployment percentage or universal transmission interval.
Emergency water support
Report a leak or water emergency
630-420-6060 is the after-hours assistance number listed with the Water Utility. The Department of Public Utilities-Water is at 1200 W. Ogden Avenue and lists 630-420-6137; the City states the water utility is on call 24/7 for sewer concerns.
Official starting point
Choose the right next step
Reading this profile
A practical reference for Naperville, Illinois and unincorporated Naperville service areas
City of Naperville Water and Wastewater Utility 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.