índex ultraviolat a Annisquam (3 mi.) | índex ultraviolat a Gloucester Harbor (4 mi.) | índex ultraviolat a Essex (8 mi.) | índex ultraviolat a Plum Island South (10 mi.) | índex ultraviolat a Plum Island (Merrimack River Entrance) (15 mi.) | índex ultraviolat a Salem (16 mi.) | índex ultraviolat a Newburyport (17 mi.) | índex ultraviolat a Salisbury Point (19 mi.) | índex ultraviolat a Hampton Harbor (19 mi.) | índex ultraviolat a Lynn (22 mi.) | índex ultraviolat a Merrimacport (22 mi.) | índex ultraviolat a Gosport Harbor (Isles Of Shoals) (22 mi.) | índex ultraviolat a Riverside (Haverhill) (24 mi.) | índex ultraviolat a Boston Light (27 mi.) | índex ultraviolat a Deer Island (South End) (28 mi.) | índex ultraviolat a Jaffrey Point (28 mi.) | índex ultraviolat a Chelsea (28 mi.) | índex ultraviolat a Gerrish Island (29 mi.) | índex ultraviolat a Fort Point (29 mi.) | índex ultraviolat a Hull (29 mi.)