*Update: 6 a.m. Wednesday, September 30, 2026* WSSC Water Reports Progress Producing Water at the Potomac Water Filtration Plant and Replenishing Distribution System

Laurel, Md. – September 30, 2026, at 6 a.m. – WSSC Water’s Potomac Water Filtration Plant made solid progress overnight to increase production and refill the storage in the water distribution system. 

While water storage throughout WSSC Water’s distribution system is returning to normal levels this morning and power delivery is adequate, the situation remains critical. The plant is operating under a temporary electrical configuration (inside the plant), and crews will continue working today to fully restore power and normal plant operations.  

Since the situation is critical and risks remain, WSSC Water’s request for essential water use remains in effect for all 1.9 million customers until further notice. Customers are strongly encouraged to continue conserving water through the following measures: 

• Use water only as necessary.
• No outdoor water use, including lawn irrigation systems.
• Avoid or limit flushing toilets (do not flush after every use). 
• Avoid or limit using washing machines and dishwashers. 

There is no boil water advisory and WSSC Water’s drinking water remains safe to use. 

WSSC Water will continue to closely monitor water production, system demand and the status of permanent electrical repairs and determine later today if the essential-water-use-only request can be lifted.

WSSC Water will continue to provide updates to keep customers informed. Check the WSSC Water website and social media, X (@WSSCWaterNews) and Facebook for updates as this situation develops. 

WSSC Water’s Potomac WFP, which draws water straight from the Potomac River, is the largest of WSSC Water’s two WFPs – treating and supplying drinking water to approximately 70-75 percent of WSSC Water customers.