Important Drought Notice: California is in a drought emergency, and the State Water Resources Control Board has instructed Golden State Water’s Simi Valley customers to reduce water use by 24% compared to 2013.

CSA Drought Image
System Reduction Goal Actual Reduction*
Simi Valley 24% 37%
* Actual reductions for period from June 1-August 23 (compared to 2013 usage)
Currently meeting reduction goal

In order to achieve the mandatory reductions established by the State Water Resources Control Board, the following Staged Mandatory Water Conservation and Rationing plan has been filed for the local water system.

Current Stage: Stage 1, effective July 1

Stage 1: Outdoor irrigation limited to two days per week, before 8 am or after 7 pm; even addresses on Monday and Thursday, odd addresses on Tuesday and Friday
Stage 2: Irrigation restrictions from Stage 1; $2.50 emergency surcharge per CcF over allocation
Stage 3: Irrigation restrictions from Stage 1; $5 emergency surcharge per CcF over allocation
Stage 4: Irrigation restrictions from Stage 1; $10 emergency surcharge per CcF over allocation
Stage 5: All outdoor use of potable water is prohibited; $10 emergency surcharge per CcF over allocation; all single-family residential customers will receive allocations based on four-person household (8 CcF per monthly billing/16 CcF per bi-monthly billing)

To learn more, please click here to visit the Drought Page of our website.

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

Staged Mandatory Water Conservation & Rationing: Stage 1 Approved

Golden State Water has received approval from the CPUC to implement Stage 1 of the Staged Mandatory Water Conservation and Rationing filing for all water systems, effective July 1.

Click here for additional information.

Read the Latest Edition of Waterways

View now.

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

View Presentation: Simi Valley
Click here for additional details.
Click here to request your 2013 Usage Data.

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.