índex ultraviolat a Rockport (3 mi.) | índex ultraviolat a Gloucester Harbor (3 mi.) | índex ultraviolat a Essex (5 mi.) | índex ultraviolat a Plum Island South (7 mi.) | índex ultraviolat a Plum Island (Merrimack River Entrance) (13 mi.) | índex ultraviolat a Salem (14 mi.) | índex ultraviolat a Newburyport (15 mi.) | índex ultraviolat a Salisbury Point (17 mi.) | índex ultraviolat a Hampton Harbor (18 mi.) | índex ultraviolat a Lynn (19 mi.) | índex ultraviolat a Merrimacport (20 mi.) | índex ultraviolat a Riverside (Haverhill) (21 mi.) | índex ultraviolat a Gosport Harbor (Isles Of Shoals) (23 mi.) | índex ultraviolat a Boston Light (25 mi.) | índex ultraviolat a Chelsea (26 mi.) | índex ultraviolat a Deer Island (South End) (26 mi.) | índex ultraviolat a Amelia Earhart Dam (Mystic River) (27 mi.) | índex ultraviolat a Hull (27 mi.) | índex ultraviolat a Charlestown (Charles River Entrance) (28 mi.) | índex ultraviolat a Jaffrey Point (28 mi.)