The New Jersey Department of Environmental Protection is a national leader committed to making decisions that are guided by science. Celebrating its 50th birthday in 2020, the DEP makes New Jersey a stronger and fairer state by protecting our environment and public health. With hard work, exceptional knowledge and expertise, the DEP’s employees have made the agency an unfailing guardian of New Jersey’s precious natural and historic resources. The DEP was established on April 22, 1970 – America’s first official Earth Day. Today, DEP employees in dozens of programs continue to advance innovative strategies to safeguard and enhance New Jersey’s air, water and land, and the health of its residents.