Groundwater Classification Areas GAA

This dataset represents Groundwater Classification Areas (GAA) in New Hampshire, designated under the Groundwater Protection Act (RSA 485-C:5). These areas are established to provide enhanced protection for groundwater resources, especially those used for public drinking water. GAA classification requires a local management program administered by a municipality or public water supplier to prevent contamination from hazardous substances. The layer supports groundwater protection planning, regulatory review, and public health initiatives.