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The New Temescal Valley Water District

New Name. Same Great Water.

Nestled in the foothills of the Cleveland National Forest is Temescal Valley Water District, the local purveyor of potable and reclaimed water for residents within the Temescal Valley area. TVWD also provides wastewater collection, treatment and disposal for the Temescal Valley residents, including the Butterfield Estates and California Meadows communities.

Temescal Valley Water District obtains its water from the Metropolitan Water District of Southern California, who imports it from Northern California. The water is then treated at the Henry J. Mills Water Filtration Plant in Riverside, CA. This water is commonly called “State Project Water” and is one of the highest quality sources of water in the State.

Since it was originally formed as the Lee Lake Water District in 1965, many changes have taken place in the Temescal Valley and in the Water District itself. What was once land farmed for citrus crops is now home to numerous residential communities, businesses and industrial parks. However, the one constant over this period of time has been the local Water District and its commitment to provide personal, reliable and efficient service to its customers.

District Calendar

8:30 AM
Board Meeting (revised date)
1:00 AM
Meter read day


Water District News

The Drought Update


Outdoor Water Use Restored...Common Sense Water Restrictions Remain In Effect

The application of potable, non-potable or recycled water to outdoor landscapes that causes runoff, such that water flows onto adjacent property, non-irrigated areas, private and public walkways, roadways, parking lots or structures is PROHIBITED.

All residential and non-residential irrigation such as Parks, HOA maintained areas, recreation fields and school grounds shall be scheduled between the hours of 9 PM and 6 AM.
Related Documents: Stage 1 and FSN newsletter 8-17-2016.pdf

Notice of Intent for Modification of a Groundwater Basin Boundary Bedford-Coldwater Groundwater Basin, City of Corona

Background – Sustainable Groundwater Management Act (SGMA)

The communities surrounding Temescal Valley Water District (TVWD), including the City of Corona (City) and the Elsinore Valley Municipal Water District (EVMWD) rely on local groundwater basins for a significant source of water supply. Recognizing the importance of groundwater to local communities, the state legislature enacted the Sustainable Groundwater Management Act of 2014 (SGMA). SGMA provides local water agencies with important new groundwater management tools not previously available for the purpose of achieving sustainable groundwater use.

In order to implement SGMA, the California Department of Water Resources (DWR) has prioritized all of the Designated Groundwater Basins in California as high, medium, low, or very low. In accordance with SGMA, DWR requires the formation of Groundwater Sustainability Agencies (GSAs) that cover the entire basin for all medium and high priority Groundwater Basins. A GSA can be a single agency, or a group of agencies coordinating the sustainable planning and management of the basin.

The TVWD service area is within the DWR-designated Elsinore Groundwater Basin (Basin No. 8-4), from which the City and EVMWD rely for water supply. DWR has designated the Elsinore Basin as high priority. TVWD, along with the City and EVMWD has been involved in groundwater resources management for the hydraulically distinct northwestern portion of the Elsinore Basin, referred to locally as the Bedford-Coldwater area. In 2008, the City prepared a Groundwater Management Plan (GWMP) for the Bedford-Coldwater area with support from TVWD.

Groundwater in the remainder of the Elsinore Basin (southeast of the Bedford-Coldwater area) is managed by EVMWD, as described in its 2005 GWMP. However, the mapped boundaries of the Elsinore Basin are not well-aligned with the alluvial materials in the Elsinore Valley.

Basin Boundary Modifications

Successful groundwater management relies on accurate delineation of groundwater basins. DWR has defined and designated 515 groundwater basins and subbasins in California. However, DWR and SGMA recognize that some of the groundwater basin designations are imperfect and, in some cases, could better support sustainable management with revised boundaries. SGMA includes a process for modifying groundwater basin boundaries from the current official delineations in DWR Bulletin 118. This process allows local agencies to request Basin boundary modifications from DWR, and provides opportunities for public and agency input. In November 2015, DWR finalized regulations for requesting modifications for basin boundaries and initiated a 90-day basin boundary modification period on January 1, 2016.

Proposed Boundary Modifications

The northwestern portion of the Elsinore Basin where TVWD is located is within the Temescal Wash watershed, and is locally referred to as the Bedford-Coldwater area. TVWD is coordinating closely with the City of Corona and the EVMWD to explore a potential basin boundary modification request from DWR to create a new groundwater basin covering the Bedford-Coldwater area, which is currently included as a northwestern segment of the Elsinore Basin. This boundary modification request would also include realignment of the existing Elsinore Basin boundaries to match the alluvium of the Elsinore Valley and Temescal Wash areas, as mapped by the United States Geological Survey (USGS). TVWD, the City, and EVWMD are submitting a combined request for boundary modifications, as required DWR.

The basin boundary modification request will document the benefits and need for the Elsinore Basin boundary modifications and creation of the new Bedford-Coldwater Basin:

·         The Elsinore Basin and proposed new Bedford-Coldwater Basin boundaries would be modified to align with the alluvial deposits as mapped by the USGS, a change that would result in better correlation between the description in DWR Bulletin 118 and the mapped extent of the basins.

·         Groundwater within the Bedford-Coldwater area is hydraulically connected to the remainder of the Elsinore Basin only beneath a narrow channel (referred to as Temescal Canyon) of Temescal Wash, providing a natural break for a basin boundary.

·         The proposed new boundary between the Bedford-Coldwater Basin and the Elsinore Basin is located across this channel, generally separating two regional groundwater flow regimes.

o   Groundwater flow north of this boundary is primarily towards the northwest and the center of the proposed Bedford-Coldwater Basin.

o   Although some groundwater inflow occurs across this boundary from the south, most of the groundwater in the remainder of the Elsinore Basin flows southeast toward the basin center.

o   The canyon contains shallow bedrock and thin alluvial sediments, which restrict the volume of subsurface inflow across the boundary.

o   Recharge within the Bedford-Coldwater area primarily occurs from runoff in adjacent hills east and west of the area rather than from the small amounts of inflow from the south.

·         The TVWD and City service areas cover almost all of the Bedford-Coldwater area; those portions outside of these service areas are not within the service area of any local water agency. The agencies will coordinate with Riverside County for these currently unmanaged areas as required under SGMA.

·         The Elsinore Basin south of the Bedford-Coldwater area is within the service area of EVMWD.

·         TVWD, in coordination with the City and EVMWD, has long been active in managing groundwater conditions in the Bedford-Coldwater area.

·         Creation of this new basin would allow TVWD, the City, and EVMWD to continue to coordinate groundwater management in the Bedford-Coldwater area separately from management of the Elsinore Basin. This arrangement would facilitate activities for sustainable management of the groundwater within the Bedford-Coldwater area.

The modified basin boundary will be more consistent with both the hydrogeologic structure and historical and ongoing management of this shared groundwater resource. A map that shows the current and proposed basin boundaries can be accessed by clicking on the Elsinore Basin Boundary Modification Map (attached as a pdf).

Public Notification and Consultation

TVWD is coordinating with the City of Corona and EVMWD to prepare a combined boundary modification request package, as required. TVWD, the City, and EVMWD have notified and are coordinating with all other affected public water systems regarding this basin boundary modification request. These agencies have also submitted a notification of intent to pursue basin boundary modifications in the Elsinore Basin to DWR.

TVWD will consider adopting a resolution to submit the package to DWR at a Board meeting. Within five working days of DWR acceptance of the request, TVWD, the City, and EVMWD will provide notification of the submittal to local agencies and public water systems within the affected basin and any person or entity that has made a written request. This notice will include information regarding the procedural requirements and deadlines for public input regarding the basin boundary modification request.

For additional information or to request notifications on the proposed Basin Boundary Modification, please email or submit in writing to the following address:

Temescal Valley Water District

Attn: Mr. Jeff Pape

22646 Temescal Canyon Road

Corona, California 92883

Related Documents: Elsinore Basin Boundary Modification Map 2-11-16.pdf

Lee Lake Water District Wants To Help You...

Save Water and Cash!

25 FREE Sprinkler Water-Efficient Sprinkler Nozzles

Related Documents: Free Sprinkler Nozzles.pdf

Pressure Problems

Who is responsible?

When it comes to water damage to your property, who is responsible?

Related Documents: water damage newsletter 2013.pdf

Association of California Water Agencies

Dealing with Drought

For General Release

Related Documents: Drought brochure Oct08.pdf

Riverside County Guide to California Friendly Landscaping

Guide to California Friendly Landscaping

For General Release

Throughout the Country, areas such as Riverside County are facing drought conditions.  As our region continues to grow, water demand continues to increase.  Landscape irrigation is a primary factor in our water consumption practices.  There are practical solutions that we can employ today by designing efficient irrigation systems, selecting water-wise plant species, and explanding our use of recycled water.

Earlier this year, the Board of Supervisors adopted Ordinance No. 859 with the goal of promoting water-efficient landscaping and irrigation practices.  To further this goal, the Planning Department created the Riverside County Guide to California Friendly Landscaping (Guide) which includes a California Friendly Plant List to assist in the selection of low-water use plants.  The Guide also describes landscape and irrigation standards which will ensure that the finished product contributes positively to the community aesthetic.

The standards contained in the Guide will be applied during the development review porcess for projects within the unicorporated areas of Riverside County.  Riverside County Planning Department staff look forward to working with landscape architects, water agencies, plant nurseries, irrigation designers, contractors, planners and the public to promote water-efficient landscaping practices.

For more information concering this program, please contact Kristi Lovelady at (951) 955-0781.

Related Documents: Guide to Calif Friendly Landscaping.pdf


Meeting the water and wastewater service needs of the Temescal Valley since 1965

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