The County, cities, and water/special districts located within the Orange County and San Diego Regional Water Board boundaries have been meeting since 2003 in an effort to work together on water…

Municipal Separate Storm Sewer System (MS4) permits issued by the Santa Ana and San Diego Regional Water Quality Control Boards (RWQCBs) require municipalities to condition “priority” new development…

Regulatory BackgroundThe California State Water Resource Control Board and the nine Regional Water Quality Control Board (RWQCB), through the Clean Water Act, help address water pollution by…

WORKING FOR ORANGE COUNTYOC Watersheds protects public health and safety, promotes environmental quality, and sustains business competitiveness through education, regulation and collaborative…

The Unincorporated Orange County Stormwater Program works to keep pollution out of our flood control channels, creeks, rivers and ocean. The County is regulated by two separate Municipal Stormwater…

Access and download critical data and PDF files from the navigation menu.State of the Environment ReportsSurface Water Quality Infrastructure Report CardFederal AgenciesOC Watersheds Grand…

Orange County ASCE infrastructure report cards were prepared in 2002, 2005, and 2010, and were instrumental in raising awareness of elected officials, decision makers, and the general public as…

  Table of Contents: [Santa Ana Region] Acronyms Executive Summary Certification Page: [Santa Ana Region] Section C-1: Introduction Section C-2: Program Management Section…

South OC IRWM   The South OC Watershed Management Area (SOCWMA) IRWM Group represents a diverse group of stakeholders engaged in integrating water resource planning across multiple…

CHWSRS Work Plan Development On March 4, 2019, OC Environmental Resources, a service area of OC Public Works, and the municipalities of the South Orange County Watershed Management Area (South OC…