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WSSC Water Assists Federal Workers Impacted by Government Shutdown   
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Recreational Water Contact Health Advisory 
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Triadelphia Reservoir  

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What's Your Pipe Type?
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Learn about our lead reduction program.

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These reservoirs serve as the primary source of drinking water for approximately one-third of WSSC Water’s 1.9 million customers.

Frequently Asked Questions about the Watershed Regulations.

Last Modified: October 3, 2025, 4:39 pm EDT