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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…
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…
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: …
County of Orange/ Orange County Flood Control District BMP Design ManualThe County of Orange/Orange County Flood Control District (County/OCFCD) is subject to two Municipal Separate Storm Sewer…
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…