City of Simi Valley, CA
Home MenuWaterworks Services
Contact
Emergency After Hours Hotline: (805) 504-2708
Water Conservation Hotline: (805) 583-6420
Customer Services (Water/Billing): (805) 583-6736
Urban Water Management Plan - Water Shortage Contingency Plan
The Urban Water Management Planning Act requires every urban water supplier to prepare and adopt an Urban Water Management Plan (UWMP) and Water Shortage Contingency Plan (WSCP) every five years. The UWMP provides a long-term assessment of water supply reliability and demand projections over a 25-year planning horizon, while the WSCP outlines procedures and actions the agency will implement during water shortages to ensure responsible and equitable water use.
On June 22, 2026, the Board of Directors of Waterworks District No. 8 adopted the following plans:
View the 2025 Urban Water Management Plan (PDF)
View the 2025 Water Shortage Contingency Plan (PDF)
Waterworks Services
Waterworks Services in Simi Valley are currently provided through two suppliers: Golden State Water Company and City of Simi Valley/Waterworks District No. 8. Approximately sixty percent of the City is served by the District, which is managed by the City, with the City Council serving as its Board of Directors. Golden State Water Company is a private company that provides water service to the other forty percent of the City.
The District delivers over 23,000 acre-feet annually to 24,000 service connections. In addition to 40 storage facilities, such as water tanks, the District has 2,700 fire hydrants, 18 pump stations, and 357 miles of water pipes in its system.
The main source of water for the District is through Calleguas Municipal Water District. The District also owns two wells in the Tapo Canyon area, which supply water to the Tapo Canyon Water Treatment Plant.
District customers may be eligible to receive water efficiency rebates through the Metropolitan Water District's Residential Rebate Program. Visit our Water Conservation page for additional information about rebates.
Resources
View the Service Area Map (PDF)
View the Water Fixture Unit Count Form (PDF)
Free viewers are required for some of the attached documents.
They can be downloaded by clicking on the icons below.
