Providing information on water wells and their construction.

What is the state requirement for water quality testing? 

The State of New Hampshire has no requirement for water quality testing for private domestic drinking water supplies. NHDES has established a list of recommended water quality parameters for testing and has published the list in a flyer Suggested Water Quality Testing for Private Wells. 

I’m having a well drilled, how deep are the wells in my area? How much water do they supply? 

The Water Well Board and NHDES maintains records of all new wells constructed in New Hampshire since 1984. This information is available online:  Well Completion Report Query Application

What is a pounded well? 

A pounded well is a common name for a well drilled by a Cable Tool Drill Machine. The cable tool method of drilling employs the principal of free falling weight to deliver rhythmic blows against the bottom of a drill hole. Cable Tool drilling is considerably slower than rotary drilling. 

Why do I have bacteria in my well? 

See fact sheet Coliform Bacteria in Drinking Water

How do I disinfect my well?

See fact sheet Disinfecting a Private Well

What is the state required setback distance from my well to my septic system or my property boundary? 

State regulations require a 75-foot protective radius for wells servicing homes with up to 5 bedrooms. The 75-foot setback applies to property boundaries and to the septic system, including the tank and leachfield. For more information, see “Drinking Water Well Locations Relative to Septic Systems”

What is hydrofracturing? 

Hydrofracturing also known as hydraulic fracturing is an optional well development technique used to increase production rates of wells by injecting water under high pressure and flow rates into a well to flush out or expand fractures within the well. For more information, see “Bedrock Well Development by Hydrofracturing.” 

How do I find a licensed water well contractor or pump installer? 

The NHDES One Stop Program has provided a query application for consumers to search for licensed well and pump contractors by company name, geographic area, or license type. 

What is an artesian well? 

An artesian well means a well deriving its water from a confined aquifer in which the water level stands above the ground surface; synonymous with a flowing artesian well. Note: Wells constructed in bedrock are commonly called artesian wells, however, only about 2% of bedrock wells are true artesian wells. 

What is the state requirement for domestic well yield? 

The State of New Hampshire has no mandated minimum flow rate for private domestic wells. The Water Well Board has published a recommended minimum volume, for in door domestic use, of 600 gallons of water deliverable to the home by the water system within a 2-hour period  at least once per day. For more information, see “Recommended Minimum Water Supply Capacity for Private Wells.”