Environmental Protection Agency - drinking water
www.epa.gov/ebtpages/watedrinkingwater.html

Iowa Department of Natural Resources - water supply
www.state.ia.us/epd/wtrsuply/wtrsup.htm

Iowa State University Extension - water quality publications
www.extension.iastate.edu/pubs/wa.htm

Iowa Department of Public Health - county health resources
www.idph.state.ia.us/common/pdf/eh/county.pdf

Iowa State University Extension - well safety
www.extension.iastate.edu/Publications/PM840.pdf