The Nidd Aqueduct is an aqueduct or man-made watercourse in North Yorkshire, England. It feeds water from Angram and Scar House reservoirs in upper Nidderdale, North Yorkshire 32 mi (51 km) to Bradford in West Yorkshire. The aqueduct supplies 21,000,000 imp gal (95,000 m3) of water per day to Chellow Heights water treatment works.