Golden State Water has been a water provider for a portion of Simi Valley since 1965. We are proud to serve quality, reliable water to approximately 13,300 customers.
Office Location
Simi Valley CSA
4680 E Los Angeles Ave. Ste H
Simi Valley CA 93063  

Average Monthly Residential Water Usage in Simi Valley

  • The average monthly residential water usage in Golden State Water’s Simi Valley Customer Service Area is approximately 13 Ccf, the equivalent of 1,300 cubic feet or 9,724 gallons.
  • Average water bill is currently $50.56, excluding any applicable credits or surcharges.
  • Water delivered to customers in the Simi Valley System is treated surface water purchased from the Calleguas Municipal Water District, which obtains its supply from Metropolitan Water District of Southern California. The primary water supply is also supplemented with groundwater from the Simi Valley Groundwater Basin.

Urban Water Management Plan (UWMP)

UWMPs are prepared to ensure adequate water supplies are available to meet existing and future water demands. Every five years, Golden State Water and all water systems that supply more than 3,000 acre-feet of water per year or serve more than 3,000 connections are required to update their UWMPs. See Golden State Water’s 2010 Simi Valley System UWMP.

  • Golden State Water plans to invest more than $3.5 million dollars in local infrastructure improvements in 2015.
  • The 2015 investments include water supply enhancements, distribution and ongoing improvements designed to replace old meters, mains and safety equipment.
  • Learn more.

Local News & Updates

Golden State Water To Invest $3.5 Million For Local Infrastructure Projects In 2015


Golden State Water would like to highlight the local infrastructure investments planned for your local Customer Service Area during 2015.

Click here to read more.

Staged Mandatory Water Conservation & Rationing
GSWC logo

Golden State Water is hosting local meetings to discuss important information about the drought and water-use restrictions.

Click here for additional details.

Click here to request your 2013 Usage Data.

Read the Latest Edition of Waterways

View now.

Golden State Water Donates Nearly 600 Turkeys to Local Non-Profits Through Operation Gobble

Zac Reineke _Los Osos CSAGolden State Water was pleased to partner with local elected officials and community leaders to distribute nearly 600 turkeys in the Coastal District through Operation Gobble.

Read more.