Virginia's 2010 NonPoint Source (NPS) Pollution Assessment and Prioritization Data Type Selection Form
The 2010 NPS Pollution Assessment and Prioritization results contain three types of evaluations: modeled NPS pollutant loadings (nitrogen, phosphorous, and sediment), measures of impaired waters (rivers and lakes/reservoirs), and biological priorities (source water and aquatic biodiversity protection). All are available at the 6th order hydrologic unit level of the National Watershed Boundary Dataset.
More information about the NPS Assessment and Prioritization study can be found at
After choosing the evaluation data type below, click on the 'Select' button at the bottom of the page to go to the query parameter selection page.
2010 NPS Pollution Assessment and Prioritization Evaluation Types:
NPS Pollutant Loads and Ranks (nitrogen, phosphorus, and sediment)
Prioritization Values and Rankings (impaired waters, source water protection, and aquatic biological integrity)