The New York City Department of Environmental Protection (DEP) is a city agency responsible for managing the city's water supply, wastewater treatment, and environmental protection efforts. It ensures that over 9 million residents have access to clean drinking water and oversees the maintenance of the city's water infrastructure. In addition to water management, the DEP also focuses on protecting the environment through various programs. These include monitoring air and water quality, managing stormwater, and promoting sustainability initiatives. The agency plays a crucial role in maintaining the health and safety of New York City's natural resources.