National Water Quality Inventory

The National Water Quality Inventory (NWQI) is a comprehensive assessment conducted in the United States to evaluate the health of the nation's waters, including rivers, lakes, and coastal areas. Managed by the Environmental Protection Agency (EPA), it collects data on water quality, identifies pollution sources, and tracks changes over time. The results help inform policymakers and the public about water safety, support conservation efforts, and guide the management of water resources to ensure they are clean and sustainable for ecosystems and human use. Regular reporting helps highlight progress and areas needing improvement in water quality.