Water Quality Data:

• USGS Water Quality Data: http://waterdata.usgs.gov/nwis
• EPA STORET Water Quality Data: http://www.epa.gov/STORET/dbtop.html

Drinking Water Information:

• CSU Water Quality Interpretation Tool: http://wsprod.colostate.edu/cwis435/WQ/index.html
• EPA Groundwater & Drinking Water: http://www.epa.gov/safewater/
• EPA National Water Quality Standards Database: http://www.epa.gov/wqsdatabase/