This is a housing subject that’s interesting from a data & public health perspective. According to research from the NAHB’s Economics analysis of the Survey of Construction (SOC), about 9% of new single-family homes started in 2019 across America were served by individual wells and more than 17% have private septic systems. The SOC classifies community or shared water supply/wells as public water rather than individual wells.
“In New England, where median lot size is three times as large as the national median, 37% of new single-family homes are built with individual wells. The reliance on private wells is also relatively common in the East North Central division where 25% of new single-family homes started in 2019 are built with individual wells. The Middle Atlantic division registers the third highest share of homes built with individual wells with the share of 16%. Four out of the nine divisions exceed the national average of 9%, including New England, East North Central, Middle Atlantic and South Atlantic.”