HAP, Inc. serves all of Hampden and Hampshire Counties in western Massachusetts, including the following cities and towns:

AGAWAM
AMHERST
BELCHERTOWN
BLANDFORD
BRIMFIELD
CHESTER
CHESTERFIELD
CHICOPEE
CUMMINGTON
EAST LONGMEADOW
EASTHAMPTON
GOSHEN
GRANBY
GRANVILLE
HADLEY
HAMPDEN
HATFIELD
HOLLAND
HOLYOKE
HUNTINGTON
LONGMEADOW
LUDLOW
MIDDLEFIELD
MONSON
MONTGOMERY
NORTHAMPTON
PALMER
PELHAM
PLAINFIELD
RUSSELL
SO. HADLEY
SOUTHAMPTON
SOUTHWICK
SPRINGFIELD
TOLLAND
WALES
WARE
WEST SPRINGFIELD
WESTFIELD
WESTHAMPTON
WILBRAHAM
WILLIAMSBURG
WORTHINGTON