The MSAR Bacteria TMDL was established due to bacterial contamination in: Santa Ana River, Reach 3; Chino Creek, Reaches 1 and 2; Mill Creek (Prado Area); Cucamonga Creek, Reach 1; and Prado Park Lake.
The MSAR Bacteria TMDL was adopted on August 26, 2005, through Resolution R8-2005-0001. They were then approved by the Office of Administrative Law (OAL) on September 1, 2006, followed by the US Environmental Protection Agency on (US EPA) May 16, 2007.
CEQA Scoping
January 9, 2023, NOTICE OF CALIFORNIA ENVIRONMENTAL QUALITY ACT (CEQA) PUBLIC SCOPING MEETING
(Page last updated 8/27/25)
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