Cars were trapped following a 54-inch water main break last year near Capitol Heights in Prince George’s County. (TRACY A WOODWARD/WASHINGTON POST)

In the District alone, the average water pipe is 77 years old and emergency crews tackle an average of 450 breaks a year.

Water gushes up on South Glen Drive in Potomac after a 2010 water main break. (Deb Lindsey/FOR THE WASHINGTON POST)

To fix our ailing water and sewer systems, the nation needs to invest $635 billion, according to a report delivered to Congress last month.

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