External Weather Links
coming soon
Total Maximum Daily Load TMDLs
A TMDL (Total Maximum Daily Load) is defined in federal regulations as “the sum of the individual waste load allocations for point sources and load allocations for nonpoint sources and natural…
Unincorporated Reports and Studies
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…
SANTA ANA REGION WATER QUALITY MONITORING
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: …
Reducing Water Runoff and Bacteria Levels to Improve South OC Water Quality
In a presentation at the California Stormwater Quality Association (CASQA) quarterly meeting on July 15, 2021, the OC Stormwater Program shared how data from a number of sources is enabling the…
Improving Water Quality Guided Tour of South OC Best Practices to Reduce Bacteria
The OC Stormwater Program has developed an ArcGIS Story Map that acts as a guided tour of Best Management Practice (BMP) implementation throughout the South Orange County Watershed Management Area (…
FAQs
OC Watersheds receives many questions through the phone hotline and online spill reporting. The following are some of the most commonly asked questions. If you have other questions, please feel free…
Get the Facts on the South OC Watershed Management Area
Did you know that the South OC Watershed Management Area provides collaborative water resource management services in the watersheds of South Orange County, which encompass a large portion of the 496…