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…

Below is the Stormwater Program Effectiveness Assessment (PEA) for the County of Orange/Orange County Flood Control District (County), for the 2016-17 reporting period (July 1, 2016 - June 30,…

Please visit northocirwm.org for the most up-to-date information on Integrated Regional Water Management (IRWM) efforts in North and Central Orange County. Efforts to develop a combined …

Table of Contents: [Santa Ana Region] Acronyms Executive Summary Certification Page: [Santa Ana Region] Section C-1: Introduction Section C-2: Program Management Section C-3…

* 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…