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East County Water Management Association

Delta Diablo (District) is a member agency of the East County Water Management Association, which was formed in 1997 as a regional partnership of eleven agencies working together on water management issues.  Through this regional partnership, members have collaborated with stakeholders and other agencies to develop an East Contra Costa County (ECCC) Integrated Regional Water Management (IRWM) program.  IRWM involves multiple agencies, stakeholders, individuals, and groups working together to manage all aspects of water resources in a region.  This collaborative effort supports integrated regional strategies for management of water supply, wastewater treatment, stormwater management, flood control, watershed protection, and habitat conservation.

The region has a long history of collaborative regional water management planning, starting with the preparation and implementation of an East County Water Management Plan in 1996, the development of a Functionally Equivalent IRWM Plan in 2005, the 2013 IRWM Plan Update, the 2015 IRWM Plan Update, and the 2019 IRWM Plan Update.

This collaborative effort has helped to secure significant grant funding for the region.  In 2007, the region was awarded $12.5M through Proposition 50 for several projects. Subsequent funding through Proposition 84 provided $3.3M for planning activities and implementation projects. Inclusion in the IRWM Plan has also allowed some of the participating agencies to receive funding under Proposition 1E for flood control and stormwater management. The region more recently received $300,000 under Proposition 1 for the Disadvantaged Community Involvement Grant Program and $2.7M for the Round 1 IRWM Implementation Grant Program. These state funds have allowed East Contra Costa agencies to leverage local funding to maximize benefits for our residents and ratepayers. The public is encouraged to participate in IRWM planning and can find additional information and upcoming public meetings at

District recycled water projects have received a funding boost from state grants through the IRWM program, resulting in 1,100 acre-feet of recycled water being available for industrial and irrigation use and setting the stage to develop remaining capacity.  District partner projects receiving funding through IRWM include the Pittsburg Recycled Water Project ($1,200,000) and the Antioch Recycled Water Project ($600,000).  The District also received funding for the Pittsburg Recycled Water Pipeline Rehabilitation Project ($1,125,000), the Delta Diablo Recycled Water Master Plan ($152,127), and the Recycled Water Supply Expansion and Fill Station Project ($309,341).