Are you concerned about lead in your drinking water? If you live in DC, this map from DC Water will tell you whether or not the pipes at your place are made of lead.

Map from DC Water. Click for the interactive version.

Lead poisoning, which can do all kinds of damage to the human body, has been in the forefront of many people’s minds since a water contamination crisis fully erupted in Flint, Michigan earlier this year. In April, the Washington Post reported that dangerous levels of lead had been found in the water at three District elementary schools.

Lead pipes were common in houses built well into the 20th century, and while having them does not at all guarantee you’ll get lead poisoning, the Environmental Protection Agency is pushing to curb their use.

When you enter an address on the map, a dot shows whether the pipes inside a house and outside of it (the ones that connect it to the water main) are lead. Gray means the pipes are lead, green means they aren’t, and white means DC Water doesn’t know.

The map does include a note saying that some of the info on the maps might not be fully up to date or accurate for every single District residence, and that customers should let the agency know if they have better information.

Do you know of other maps that give residents important information about the infrastructure they use every day?

Jonathan Neeley was Greater Greater Washington's staff editor from 2014-2017. He gets most everywhere by bike (or Metro when it's super nasty out), thinks the way planning decisions shape our lives is fascinating, and plays a whole lot of ultimate. He lives in Brookland.