Sanitary Sewer Overflow

At Piscataway Wastewater Treatment Plant Accokeek, Maryland Weather a contributing factor

| News Release



Laurel, Maryland – October 12, 2013: There was a Sanitary Sewer Overflow (SSO) at the Washington Suburban Sanitary Commission’s (WSSC) Piscataway Wastewater Treatment Plant in Accokeek today. The SSO began at about 12:45 a.m. and ended at approximately 3:00 a.m. It is estimated that 6,000,000 gallons of diluted wastewater overflowed and was contained on the plant grounds.

The combination of excessive rainfall and a closed valve caused the overflow. Because flows at the plant were higher than normal and a valve was closed, wastewater was able to reach a piece of equipment that was out of service and overflow.

The Commission’s drinking water system is separate from the wastewater system. WSSC’s drinking water is safe and was not affected by this overflow.

The Maryland Department of the Environment and the Prince George’s County Health Department have been notified of the overflow. WSSC crews have cleaned up debris on the plant grounds and spread lime.

WSSC is committed to protecting the health of the public and the environment. With more than 5,400 miles of sewer mains throughout its service area, WSSC appreciates notification from citizens if a sewer back up is suspected. Citizens can call 301-206-4002 or toll free 1-800-828-6439 at any time to report water or sewer emergencies in Prince George's or Montgomery counties.

For 100 years, WSSC has proudly served the citizens of Prince George’s and Montgomery counties – providing drinking water that has always met strict Safe Drinking Water Act standards and protecting the environment through vital water resource recovery services. Our vision is to be THE world-class water utility, where excellent products and services are always on tap.


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