The group's principal activity is to collect and distribute water for domestic, commercial and industrial uses and fire protection. It provides water related services in Ansonia and Derby, Connecticut and Seymour. The group is a specially chartered Connecticut public service corporation. The current sources of the group's water are wells located in Derby and Seymour and interconnections with the south central Connecticut regional water authority's system. Birmingham utilities' properties consist chiefly of land, wells, reservoirs, and pipelines. The group has approximately 11,270 customers principally residential and commercial.