Next Generation National Nutrient Inventory For Nitrogen And Phosphorus (1987 To 2017)

The United States Environmental Protection Agency’s National Nutrient Inventory provides estimates of major agricultural, urban, atmospheric, and natural nutrient fluxes for the contiguous US at county and HUC12 scales from 1987 (from 1950 for agriculture) to 2017. We recommend using the attached HUC12 shapefiles which correspond with the HUC12 datasets provided. Portions of this dataset are inaccessible because: NA. They can be accessed through the following means: NA. Format: NA
Organization: U.S. Environmental Protection Agency
Last updated: 2025-11-24T13:29:19.119933
Tags: agriculture, air-pollution, atmospheric-deposition, nitrogen, phosphorus, urban, wastewater