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What We Do
Water Supply

What We Do

Water Supply

Business Customers 
State Ban on Nonfunctional Turf Irrigation: How it Applies to You 

Eastern Municipal Water District (EMWD) is committed to working with our Commercial, Industrial, and Institutional (CII) customers to help them achieve their corporate sustainability goals and reach compliance with statewide regulations on outdoor irrigation of nonfunctional turf. EMWD offers a variety of customer-focused programs such as rebate opportunities, technical resources, and educational information to help your organization reduce its water footprint and do its part to help California stretch its water supply resources.



California’s Water Supply Conditions 


EMWD Has You Covered 

With California continually facing extreme weather conditions that result in either prolonged dry conditions or periods of significant rainfall, EMWD has you covered with the latest on the statewide and local water supply conditions and regulations.

Water Supply Status 

While California and the western United States will always experience cyclical water supply conditions, EMWD has proactively prepared for these periods through investments in a diverse water supply portfolio, successful management of its resources, and other programs to promote water use efficiency.

How We Stay WaterWise 
It's a way of life 

Logo - Stay Water Wise with outdoor efficiency

Using water wisely is a way of life for Southern California residents.  As California continues to face extreme weather conditions, EMWD appreciates your partnership in helping to use our state’s water supplies wisely. Staying WaterWise doesn’t have to be a big and scary task.  It can be as simple as reducing irrigation timers by 2 minutes for every 10 minutes or switching standard sprinklers to rotating nozzles.  Whether you’re a homeowner or a renter, small changes like these add up to big savings in both gallons and dollars.  When we Stay WaterWise we fulfill our responsibility of helping California maintain our water supply.


Imported Water 

The majority of EMWD’s potable (drinking) water demand is supplied by imported water from The Metropolitan Water District of Southern California through its Colorado River Aqueduct and its connections to the State Water Project.



Approximately 20 percent of EMWD’s potable (drinking) water demand is supplied by EMWD groundwater wells. The majority of the groundwater produced by EMWD comes from its wells in the Hemet and San Jacinto area. Some of these wells have limited production as a result of the Fruitvale Judgment and Decree. EMWD also has wells in the Moreno Valley, Perris Valley and Murrieta areas.


Sustainable Groundwater Management Act 

The objective of the Sustainable Groundwater Management Act (SGMA) is sustainable groundwater management in a manner that prevents significant and unreasonable impacts to groundwater basins in California. Under SGMA, each high and medium priority basin, as identified by the California Department of Water Resources (DWR), is required to have a Groundwater Sustainability Agency (GSA) that will be responsible for groundwater management and development of a Groundwater Sustainability Plan (GSP). The EMWD Board of Directors is the GSA for the West San Jacinto Groundwater Basin and is responsible for development and implementation of a GSP.


Attn: Thomas Henderson
Principal Engineering Geologist 
P.O. Box 8300
Perris, CA 92572-8300
(951) 928-3777 ext. 4584

Hemet-San Jacinto Watermaster 

The Hemet‑San Jacinto Watermaster (Watermaster) is a judicial creation of the Superior Court of the State of California in and for the County of Riverside through the Stipulated Judgment entered on April 18, 2013 (Riverside County Superior Court Case No. RIC 1207274).  The Stipulated Judgment declares individual rights of Eastern Municipal Water District (Eastern), Lake Hemet Municipal Water District (Lake Hemet), City of Hemet (Hemet), City of San Jacinto (San Jacinto) and other private groundwater pumpers to Groundwater in the Canyon Subbasin, the San Jacinto Upper Pre