Public Water Authority
Walnut Valley Water District
Serving Walnut, Diamond Bar and surrounding Walnut Valley Water District service area
Population served
100,941
State system code
FIPS 06
Billing frequency
Monthly; WVWD states water bills are prepared monthly unless a rate schedule establishes otherwise.
Provider briefing
How this utility’s billing works
Walnut Valley Water District operates as a public water authority serving Walnut, Diamond Bar and surrounding Walnut Valley Water District service area. 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 A dedicated this detail was not publicly posted. The reviewed current billing page links the District's rate schedules but the detailed 2026 residential tariff values were not exposed in the page text. Billing is metered and includes service and consumption components.. Bills are generated monthly; wvwd states water bills are prepared monthly unless a rate schedule establishes otherwise., and a typical residential cost reference is A dedicated this detail was not publicly posted. The reviewed current WVWD payment page does not publish a 5,000-7,000 gallon sample bill or enough tariff detail to calculate a defensible 2026 total.. 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
A dedicated this detail was not publicly posted. Walnut Valley Water District's reviewed customer pages concern the water bill and do not publish a universal sewer formula or identify a single sewer-billing agency for every service address.
Meter and infrastructure notes
Bills show current and previous meter readings, consumption and days of service, and the online account offers usage monitoring and leak alerts. The reviewed page does not identify AMI/AMR hardware, transmission frequency or a universal route-reading schedule.
Emergency water support
Report a leak or water emergency
(909) 595-7554; WVWD states its emergency on-call team is available 24/7 at this customer-service number.
Official starting point
Choose the right next step
Reading this profile
A practical reference for Walnut, Diamond Bar and surrounding Walnut Valley Water District service area
Walnut Valley Water District is listed here as a public water authority. 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.