UPDATE:Sanitary Sewer Overflow in Riverdale Ended at 12:45 P.M.

Drinking Water System Not Affected

| News Release



Laurel – August 18, 2016 – There was a Sanitary Sewer Overflow (SSO) in the median of the Baltimore Washington Parkway between Route 410 and Route 450. 

The overflow was caused by a broken sewer main that began at 1:15 p.m. on Wednesday and ended at 12:45 p.m. on Thursday. An estimate of the overflow volume is 336,444 gallons of untreated wastewater into an unknown tributary in the Northeast Branch Basin.

Signs have been posted downstream informing residents of the overflow. WSSC is working closely with the National Park Service on the cleanup efforts. 

Appropriate notifications have been made to the Maryland Department of the Environment and the Prince George’s County Health Department. 

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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