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  2. Sanitary Sewer Overflows (SSOs) | US EPA - U.S. Environmental ...

    www.epa.gov/npdes/sanitary-sewer-overflows-ssos

    These types of releases are called sanitary sewer overflows (SSOs). SSOs can contaminate our waters, causing serious water quality problems, and back-up into homes, causing property damage and threatening public health. Possible causes of SSOs include: vandalism.

  3. Sanitary Sewer Overflow (SSO) Frequent Questions | US EPA

    www.epa.gov/npdes/sanitary-sewer-overflow-sso-frequent-questions

    Sanitary Sewer Overflows (SSOs) are a release of untreated or partially treated sewage from a municipal sanitary sewer. Why do sewers overflow? SSOs occasionally occur in almost every sewer system, even though systems are intended to collect and contain all the sewage that flows into them.

  4. Sanitary Sewer Overflows - US EPA

    www3.epa.gov/npdes/pubs/ssodesc.pdf

    What are Sanitary Sewer Overflows? A sanitary sewer overflow can spill raw sewage into basements or out of manholes and onto city streets, playgrounds and into streams, before it can reach a treatment facility.

  5. Combined Sewer Overflow Basics | US EPA - U.S. Environmental...

    www.epa.gov/npdes/combined-sewer-overflow-basics

    To understand combined sewer overflows (CSOs), we first need to know how sewer systems work. Most U.S. communities today have separate sanitary sewer systems. In this type of system, one set of pipes collects wastewater from homes and businesses and carries it to a wastewater treatment plant through sanitary sewers.

  6. Sanitary sewer overflow - Wikipedia

    en.wikipedia.org/wiki/Sanitary_sewer_overflow

    Sanitary sewer overflow (SSO) is a condition in which untreated sewage is discharged from a sanitary sewer into the environment prior to reaching sewage treatment facilities. When caused by rainfall it is also known as wet weather overflow.

  7. These types of discharges are called sanitary sewer overflows (SSOs). SSOs have a variety of causes, including but not limited to severe weather, improper system operation and maintenance, and vandalism. EPA estimates that there are at least 40,000 SSOs each year.

  8. Why Control Sanitary Sewer Overflows? - US EPA

    www3.epa.gov/npdes/pubs/sso_casestudy_control.pdf

    Sanitary sewer overflows (SSOs) are releases of untreated sewage into the environment. They have always been illegal under the Clean Water Act, but EPA's proposed SSO Control Rule will clarify the prohibition and provide a program for helping municipalities track and report activities undertaken to control SSOs.

  9. What is a sanitary sewer overflow? - Wastewater Digest

    www.wwdmag.com/what-is-articles/article/55016956/what-is-a-sanitary-sewer-overflow

    A sanitary sewer overflow is when sanitary sewers release untreated or partially treated sewage into the environment before it reaches sewage treatment facilities. Sanitary sewer overflows are different than combined sewer overflow.

  10. Sanitary Sewer Overflows (SSOs) | National Pollutant Discharge...

    19january2017snapshot.epa.gov/npdes/sanitary-sewer-overflows-ssos

    These types of releases are called sanitary sewer overflows (SSOs). SSOs can contaminate our waters, causing serious water quality problems, and back-up into homes, causing property damage and threatening public health.

  11. Large volumes of I/I can cause sanitary sewer overflows (SSOs) and/or operational problems at the wastewater treatment facility serving the collection system. In addition, sewage overflows can be caused by other problems such as blockages, equipment failures, broken pipes, or vandalism.