Dashing this off from the Christmas table, so as expected most immediate Google results are the government pages. Here's the replacement description. You'll not

Dashing this off from the Christmas table, so as expected most immediate Google results are the government pages. Here's the replacement description. You'll notice that they're still actively replacing mains (at an extraordinarily slow rate, essentially whenever a line needs service.) If memory serves, the main line for half the city was laid during the Lincoln administration. I believe the average annual replacement rate is around 1%. Replacement information: https://www.dcwater.com/lead/scheduled_replacements.cfm https://www.dcwater.com/lead/scheduled_replacements.cfm