California Groundwater Association http://www.groundh2o.org/
National Groundwater Association http://www.ngwa.org
Grundfos http://www.grundfos.com/
Franklin Electric http://www.franklin-electric.com/americas-water-systems.aspx
Amtrol Products http://www.amtrol.com/
United States Environmental Protection Agency www.epa.gov
Water Quality Association www.wqa.org
California Department of Water Resources http://wwwdwr.water.ca.gov
American Ground Water Trust http://www.agwt.org
NSF-The Public Health & Safety Company http://www.nsf.org/consumer/drinking_water/dw_well.asp
Contractors State License Board https://www2.cslb.ca.gov/onlineservices/checklicenseII/checklicense.aspx
Shasta County http://www.co.shasta.ca.us/index.aspx
Butte Count y http://www.buttecounty.net/
Tehama County http://www.co.tehama.ca.us/
Glenn County http://www.countyofglenn.net/
