How much water do I need?
The amount of water that a well needs to produce in gallons per minute (gpm) to provide an adequate supply of water for a single family residential home depends upon how deep the well is and how much water is going to be used by the home in a 24-hour period. The depth of the well is important because the deeper a well is, the more water it has in storage, available for immediate use.
The Maine Ground Water Association has recommended minimum flow rates for single family homes. Their standards are based on a static water level of approximately 25 feet below ground surface. Every foot of a 6” (diameter) well holds approximately 1.5 gallons of water. Recommended minimum flow rates:
75’ well depth – 5 gallons per minute
110’ well depth – 4 gallons per minute
160’ well depth – 3 gallons per minute
250’ well depth – 2 gallons per minute
320’ well depth – 1 gallon per minute
420’ well depth – .5 gallon per minute