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Abstract
The Environmental Protection Agency has finalized regulations to require water systems to replace millions of lead pipes with safer alternatives for carrying drinking water into U.S. homes. Before replacing them, public water systems must first identify where these lead service lines are located due to incomplete inventories and a lack of historical records. We conducted a randomized controlled trial to evaluate an intervention that targeted properties with unknown pipe material in Trenton, New Jersey—a community with older housing stock and a high concentration of people of color, renters, and households experiencing poverty. The intervention included two treatments: door hangers with information about a self-inspection process that allowed residents to submit a photo of their service line; and similar door hangers offering gift card incentives upon submission of a self-inspection photo. These treatments did not motivate residents to participate in a self-inspection of their service lines. Well under 1% of treated addresses participated in a self-inspection, including those offered the highest gift card incentive of $100.