The 1995 Water Quality Control Plan for the Santa Ana River Basin (Region 8) was updated in February 2008, June 2011, and February 2016. Important! Please review Notes about the February 2008, June 2011, February 2016 and June 2019 Basin Plan updates.
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Basin Plan Maps - Maps showing all water bodies listed in the Water Quality Control plan for the Santa Ana River Basin - Regional 8, also known as the Basin Plan (draft work product, to be used for informational purposes only).
Map of Hydrologic Areas of the Santa Ana River Basin (resource not in Basin Plan) Index to Map of Hydrologic Areas of the Santa Ana River Basin (resource not in Basin Plan) Salt Management Plan Stormwater Quality Task Force Total Maximum Daily Loads (TMDLs)
Resolutions for Basin Plan Amendments are listed below
For additional information regarding the Basin Plan please contact Claudia Tenorio at (951) 782-4963
(Page last updated 4/13/22)
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