OC Stormwater Compliance ProgramManaging stormwater compliance for Unincorporated Orange County, Orange County Flood Control District and Orange County Owned and Maintained Facilities.Best Management…

Join us every Wednesday night in OC Parks’ Irvine Ranch Open Space for a fitness-focused hike on the paved Hicks Haul Road. During the spring, summer and fall, hikers will enjoy wonderful sunset…

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…

County of Orange BMP Design ManualThe County of Orange (County) is subject to two Municipal Separate Storm Sewer System (MS4) permits issued by the Santa Ana and San Diego Regional Water Quality…

As a result of the Third Term NPDES Municipal Stormwater Permits for Orange County, adopted by the Santa Ana and San Diego Regional Water Quality Control Boards in early 2002, the cities and County (…

The Santa Ana Region Monitoring Plan fulfills the requirements of Phase I MS4 Permit issued by the Santa Ana RWQCB. Maps of the Santa Ana Region monitoring sites is provided in the link below: …

OC Environmental Resources oversees a wide array of programs designed to assess the condition of the surface water environment in Orange County. The OC Monitoring and Data Assessment division manages…

While the 2007 Drainage Area Management Plan (DAMP) provides a foundation for the Orange County Stormwater Permittees to implement model programs designed to prevent pollutants from entering…

The County and cities of south Orange County are subject to a municipal separate storm sewer system permit (MS4 Permit) issued by the San Diego Regional Water Board (Water Board) which regulates…