Private (domestic) wells are not currently regulated by the US Environmental Protection Agency (EPA) therefore private well owners are responsible for the quality of their own drinking water. 

Local Health Departments/Districts have the authority over private wells in their respective towns. Private wells should be properly sited and approved before being constructed.

For technical advice on well water construction, maintenance, quality or treatment contact your Local Health Department/District or the Department of Public Health – Private Water Program at 509-7296.

Homeowner's Checklist

• Well Driller's Roster (Department of Consumer Protection)
• Listing of Local Health Departments
• What to test for?
• Well Siting Requirements
• Groundwater and Well Contamination
• Disinfection Procedure for Private Wells  
• Residential Well Water Testing (pdf)  
• Private Drinking Water Standards (pdf) 

List of Approved  Laboratories   

• Environmental Protection Agency:  What Every Realtor Should Know About Private Drinking Water Wells (pdf)

Laws and Regulations

• Public Health Code-section 19-13-B51 (location/construction) (doc)
• Public Health Code-section 19-13-B101 (private well water quality, new wells must be approved by Local Health Departments before Building Official can grant a Certificate of Occupancy for the new home) (doc)
• Public Health Code-section 19-13-B102 (public water quality standards as they apply to private wells, subdivisions e2, 3 & 4) (doc)
• Regulations of Connecticut State Agencies Title 25. Water Resources Department of Consumer Protection Description of Organization, Rules of Practice, and Regulations for the Well Drilling Industry  (pdf)