The Fond du Lac (Wisconsin) City Council recently passed an ordinance requiring citizens to replace the private side of lead service lines whenever the road in front of their house is reconstructed or emergency pipe repairs take place. Using a fully digitized GIS system, city personnel and Fond du Lac residents can query any information about service lines in seconds. That system, combined with the city’s Get the Lead Out education program, is helping citizens understand the importance of invisible underground infrastructure.