This Indio Subbasin (ISB) 2022 Alternative Plan Update has been prepared to meet specific requirements of the Sustainable Groundwater Management Act (SGMA) as it applies to the ISB. This plan update is also intended to support water management planning for the ISB, designated as Basin No. 7-21.01 by the California Department of Water Resources (CDWR).
The foundation for the 2022 ISB Alternative Plan Update (also known as the ISB Water Management Plan) is the 2010 Coachella Valley Water Management Plan Update (CVWMP). The CVWMP met the requirements to be considered an alternative to a groundwater sustainability plan (GSP) under the SGMA. In 2019, the CDWR approved the CVWMP as the Alternative Plan for the ISB, finding it functionally equivalent to a GSP. The first five-year update to the ISB Alternative Plan is due for submittal to the CDWR by January 1, 2022.
The 2022 ISB Alternative Plan Update incorporates the most current projections for population growth, land use, water demand, water supply outlook, and other future conditions into ISB water management planning to ensure that future water demands can be reliably met and groundwater managed sustainably. In addition, the update integrates specific recommendations from the CDWR regarding management criteria for groundwater levels, storage, and subsidence; water quality mapping; identification of groundwater dependent ecosystems; and other recommendations. The 2022 ISB Alternative Plan Update was prepared collaboratively by the Groundwater Sustainability Agencies (GSAs) in the ISB, who are Coachella Valley Water District (CVWD), Coachella Water Authority (CWA), Desert Water Agency (DWA), and Indio Water Authority (IWA).