Northern VA Soil & Water Conservation District
www.iso.gmu.edu/~avia/intro.html

Jenway
www.jenway.com

Kentucky Water Watch
http://water.nr.state.ky.us/ww

Centreville Middle School Water Quality Monitoring Program
www.qacps.k12md.us/cms/sci.monhome.htm

North Carolina State University Water Quality Group
http://h2osparc.wq.ncsu.edu/index.html

North Carolina Cooperative Extension
http://www5.bae.ncsu.edu/programs/extension/eqg/volunteer/mantoc.html

Friends of Five Creeks
www.fivecreeks.org

Pennsylvania Department of Conservation and Natural Resources
www.dcnr.state.pa.us