EMPTY FIELD

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…

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…

Access and download critical data and PDF files from the navigation menu. State of the Environment Reports Surface Water Quality Infrastructure Report Card Federal Agencies OC…

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…

EMPTY FIELD

Please visit www.southocirwm.org for the most up-to-date information on Integrated Regional Water Management (IRWM) efforts in South Orange County. **SOUTH ORANGE COUNTY ANNOUNCES PROPOSITION 1…

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…

The County of Orange and municipalities of south Orange County have prepared and submitted to the San Diego Regional Water Quality Control Board on January 30, 2020, a South…

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…