The recovery of Ingrams Branch in Delaware offers a striking example of how sustained agricultural conservation can reverse decades of nutrient pollution. In 2006, Delaware formally established nutrient controls for the Broadkill River watershed after monitoring showed that elevated nitrogen and phosphorus were impairing waterways. Agricultural runoff was identified as an important source of the problem. Nearly two decades later, a combination of best management practices (BMPs), technical assistance, conservation funding and cooperation with farmers helped reduce phosphorus concentrations in Ingrams Branch. In 2024, Delaware’s Department of Natural Resources and Environmental Control (DNREC) removed the phosphorus impairment for the 7.6-mile Ingrams Branch segment from the state’s impaired-waters list. The U.S. Environmental Protection Agency (EPA) now highlights the project as a nonpoint-source pollution success story.
The Broadkill River watershed covers approximately 105 square miles in Sussex County and includes communities and landscapes associated with Milton, Lewes and Georgetown. Ingrams Branch is part of the Broadkill headwaters, alongside tributaries including Martin Branch, Beaverdam Creek, Round Pole Branch, Pemberton Branch and Primehook Creek. The watershed contains extensive agricultural land, making nutrient management particularly important to water quality.
