Water Supply Assessments

Water Supply Assessments

While official water supply assessments and verifications were first required in 2002 due to the passage by the California State Legislature of of SB 610 (Costa) and SB 221 (Kuehl), IRWD has always proactively planned for the future. Water supply assessments closely tie land use planning and water supply reliability. 

Water supply assessments, under SB 610, determine water supply sufficiency for a 20-year projection in addition to the demand of existing and other planned future uses, including, but not limited to, agricultural and manufacturing uses. They are required for any project that is subject to the California Environmental Quality Act and proposes commercial development of more than 250,000 square feet of floor space, a retail center with more than 500,000 square feet of floor space or more than 500 dwelling units.

Under SB 221, approval by a city or county of residential subdivisions of 500 dwelling units or more requires a written verification of sufficient water supply from the water supplier. The verification is prepared prior to the adoption of the final subdivision map and ensures that the sufficient water supply is available to serve a new subdivision before construction begins. The verification can use information from the water supply assessment prepared for the project.

 Current IRWD Water Supply Assessments/Verifications
 

SANTIAGO HILLS PHASE II and EAST ORANGE PLANNED COMMUNITY AREA 1, 2 & 3

Latest News

happy-to-see-green-thank-our-purple-pipes
Happy to See Green? Thank Our Purple PipesLet’s be honest. We love our treelined streets, verdant medians and common areas that define the Irvine Ranch Water District. And while other communities are cutting back on their landscaping, ours continues to flourish. Since 1963, IRWD has been implementing a...
chilling-with-recycled-water-irwd-and-uci-team-up-to-save-80-million-gallons-of-drinking-water-a-year
Chilling with Recycled Water: IRWD, UCI Save 80 Million Gallons of Drinking Water a YearUC Irvine and Irvine Ranch Water District officials toss ceremonial buckets of water into the cooling towers to kick off the new project. (Shown here, right to left, are UCI Associate Chancellor for Sustainability Wendell Brase, IRWD Board President Douglas...
how-the-irwd-team-safeguards-your-water
How the IRWD Team Safeguards Your WaterThanks to all of the IRWD customers who joined us July 10 for our Tap Water 101 community workshop. If you missed it, check out our new 3-minute video, “Journey of a Water Sample.” You’ll tag along with real IRWD...