OC Public Works, on behalf of the municipalities of South Orange County Watershed Management Area (South OC WMA), has initiating the Flow Ecology Special Study as identified in the Water Quality…

In a presentation at the California Stormwater Quality Association (CASQA) quarterly meeting on July 15, 2021, the OC Stormwater Program shared how data from a number of sources is enabling the…

* Please note that the reports below are prepared on behalf of municipalities within the Santa Ana Region Water Quality Control Board jurisdiction of Orange County. For reports on progress…

These reports, prepared as part of the Reports of Waste Discharge (ROWDs) submitted near the end of 4th term MS4 Permits for Orange County, represents a commitment to present a…

South OC Municipalities Prepare and Submit the First WQIP Annual Report The County of Orange and municipalities of south Orange County have prepared and submitted to the San Diego Regional…

OC Watersheds receives many questions through the phone hotline and online spill reporting. The following are some of the most commonly asked questions. If you have other questions, please feel free…

A number of documents are available on these pages that describe the regulations and programs aimed at preventing and controlling the discharge of pollutants to the municipal stormdrain system and…

Below is the Santa Ana Regional Board jurisdictional Stormwater Program Effectiveness Assessment (PEA) for the County of Orange/Orange County Flood Control District (County), for the 2017-18…

    Below is the Stormwater Program Effectiveness Assessment (PEA) for the County of Orange/Orange County Flood Control District (County), for the 2015-16 reporting period (July 1…

In order to increase awareness and understanding of the 2003 DAMP, the Orange County Stormwater Permittees have worked to develop training modules to accompany each of the model program elements. If…