Sanitary Sewer Overflow Program
A sanitary sewer overflow (SSO) is any overflow, spill, release, discharge or diversion of untreated or partially treated wastewater from a sanitary sewer system. SSOs often contain high levels of suspended solids, pathogenic organisms, toxic pollutants, nutrients, oil, and grease. SSOs pollute surface and ground waters, threaten public health, adversely affect aquatic life, and impair the recreational use and aesthetic enjoyment of surface waters. Typical consequences of SSOs include the closure of beaches and other recreational areas, inundated properties, and polluted rivers and streams.
- State Board Website on Sanitary Sewer Overflow Program (General State Board Order for Collection Systems)
- California Integrated Water Quality System (CIWQS) Help Center - Sanitary Sewer Overflow Program
- Regional Water Board New Spill Reporting Requirements for Public Owned Treatment Works - Effective Immediately
- CIWQS Sanitary Sewer Overflows Reports
- Report a Spill