Body 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 Integrated Regional Water Management (IRWM) Plan for the North and Central OC Watershed Management Areas (The OC Plan) began in February 2017. The OC...

Body 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 to the need to maintain and improve public infrastructure as well as identify sustainable funding sources for doing so. A surface...

Body EMPTY FIELD

Body 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 receiving waters. Orange County lies within two different regions of the State Water Quality Control Board's jurisdiction: the Santa Ana...

Body 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 receiving waters. Orange County lies within two different regions of the State Water Quality Control Board's jurisdiction: the Santa Ana...

Body 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 Watersheds Grand Jury OC Watersheds Local Cities Water Providers State Agencies

Body 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 and significant redevelopment projects to ensure they incorporate structural controls into their design which capture and infiltrate, treat, reuse, and/or evapotranspirate stormwater...

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Body Regulatory Background The 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 regulating point sources that discharge pollutants, such as stormwater and non-stormwater discharges, to waters of the United States under the National Pollutant...

Body 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 comprehensive picture of the quality of Orange County’s creeks, rivers, bays and coastal waters and the actions being taken by...