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 22% compared to 2013.

CSA Drought Image
System Reduction
Simi Valley 22%** 34.2% 32.5%
* Total from June 1, 2015 – June 19, 2016 (compared to 2013 usage)
**Adjusted by SWRCB, effective March 1, 2016

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, 2015

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
General Manager: Mark Zimmer 
Office Hours: 8 a.m. to 5 p.m., Monday – Friday, excluding holidays  

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 $2.8 million dollars in local infrastructure improvements in 2016.
  • The 2016 investments include water supply enhancements, distribution and ongoing improvements designed to replace old meters, mains and safety equipment.
  • Learn more.

Local News & Updates

Update Regarding State-Issued Emergency Drought Regulations
capitol drought

The state of California recently adopted new emergency drought regulations and made existing water waste restrictions permanent.

Click here for an update.


More than $76 million has been invested in the Coastal District’s water infrastructure

Golden State Water has invested more than $700 million over the last decade on effective infrastructure improvements throughout the state.

Click here to see the most significant projects completed in your service area.

State-Issued Conservation Mandates Adjusted For Some Water Systems

drought picThe State of California recently revised conservation mandates for several water systems throughout the state, including 14 systems served by Golden State Water.

Click here to read more.


Simi Valley Hosts Annual Emergency Preparedness Expo

Golden State Water will join more than 340 vendor booths, local departments, services and agencies to spread awareness on how to be prepared in a state of emergency on May 14. Residents of all ages are welcome to attend!

Click here for more information.