Santa Margarita River Watershed

Santa Margarita River Watershed Protection Program

The Santa Margarita River Watershed flows into the Santa Margarita River, passing through southwest portion of Riverside County (including areas of the Cities of Menifee, Murrieta, Wildomar, and unincorporated County of Riverside, and all of the City of Temecula) into San Diego County.

Compliance Documents

The Santa Margarita River Watershed Management Area (SMRWMA) provides public access to all plans, reports, maps, and supporting information required to implement the Regional MS4 Permit. Visit this page to view Water Quality Improvement Plans (WQIP), Annual Reports, etc.

SMRWMA REGIONAL CLEARINGHOUSE

Benefit Assessments

Benefit Assessments are apportioned on the basis of proportionate stormwater runoff generated by each parcel. This method of assessment is consistent with State law and the District Act. The amount of benefit is computed based on parcel size (acreage) and use classification. The fee is referenced on property tax bills as “FLDCNTL Stormwater/clean water.”

For questions regarding the Stormwater Benefit Assessment Fees, please contact the Riverside County Flood Control & Water Conservation District at: 951-955-1200.

Santa Margarita River Watershed’s Engineer’s Report:

FY 25/26 FY 24/25 FY 23/24 FY 22/23 FY 21/22 FY 20/21