Licensed Well Driller and Pump Installers - Colorado Division of Water Resources (DWR). If you need to find a licensed well driller, this link lists DWR licensed contractors by City, Company, Last Name and License Number. The lists are updated quarterly.
Well Permit Search - DWR's online tool to search for existing permits by permit number, location, owner, address and more.
Guide to Colorado Well Permits (PDF) - A 20 page brochure with a comprehensive overview on types of well permits, designated basin in formation, residential wells and wells with water rights. DWR publication, 2012.
The Private Well Class - Another excellent online resource for well and septic system owners. This site offers free videos, webinars and e-mail classes and podcasts. This is a service of the University of Illinois at Urbana-Champaign