Enhancing Nutrient Reduction Efforts with the National Nutrient Inventory Training Webinar Archive

This webinar, recorded on April 3, 2025, showcased EPA’s National Nutrient Inventory Research Portfolio, which provides users with (1) nationally consistent, standardized methodology to track nutrient pollution sources across the U.S. and (2) models to help understand how these pollution sources affect local and downstream water quality resources.

Enhancing Nutrient Reduction Efforts with the National Nutrient Inventory Training Webinar recording

Enhancing Nutrient Reduction Efforts with the National Nutrient Inventory Training Webinar slides (pdf) (3.6 MB)

Interested in learning more? Read the article published in December 2025 titled "The US EPA’s National Nutrient Inventory: Critical Shifts in US Nutrient Pollution Sources from 1987 to 2017."