To determine whether physical, chemical, and biological data have been collected in parks, the Inventory and Monitoring Program and the Water Resources Division have partnered to prepare Baseline Water Quality Data Inventory and Analysis ('Horizon') Reports for Network parks. These reports inventory and describe available water quality data that exist in the Environmental Protection Agency's STORET (http://www.epa.gov/storet/) national water quality database and the U.S. Geological Survey's National Water Information System (http://waterdata.usgs.gov/nwis).
For more information, visit the I&M Water Quality site.