Prior to selecting a water well contractor for the job, it is a good idea to obtain information about several water well contractors in the area before making a choice. To find a well professional or drilling company, ask your neighbors, consult a web search, call your state water well association or local health department. Once you've identified a few prospective companies, ask a lot of questions. Ask for two to three references from former customers. Find out how long the company has worked in your area, how many wells they have drilled and how satisfied their customers really are. Your well professional should be certified, licensed or registered with your state health or environmental agency. Specific requirements vary from state to state. Ask for proof of proper credentials and well association memberships. A professional water well driller uses a written contract. The contract should include details of the job and warranties or guarantees, if any. A drilling company and its personnel should be insured. Some states require bonding; some do not. Find out what the law requires. An experienced driller knows about the geology of the area in which he or she drills and can clearly explain it to you. A knowledgeable driller knows state and local regulations that govern well drilling. Timely maintenance and repair services are important to well owners. A company that offers these services can make life easier for you and ensure the proper function of your well system.