Cheddar Reservoir is an artificial reservoir in Somerset, England, operated by Bristol Water. Dating from the 1930s it has a capacity of 135 million gallons (614,000 cubic metres). The reservoir is supplied with water taken from the Cheddar Yeo river in Cheddar Gorge. The inlet grate for the 54 inches (1.4 m) water pipe that is used to transport the water can be seen immediately upstream from the sensory garden in Cheddar Gorge.
It lies to the west of the village of Cheddar and south east of the town of Axbridge. It is roughly circular in shape, and surrounded by large earth banks which are grazed by sheep. It has been designated as a Site of Special Scientific Interest (Ref No:1003948) due to its wintering waterfowl populations.
It was the first British reservoir to permit sailing. Bristol Corinthians sailing club is situated at its northern end. Other recreational activities at the reservoir include windsurfing, angling (for pike, tench, roach, perch and eels), and birdwatching.
Two car parks give access to the reservoir; one is at the Axbridge end, and on the eastern side, accessible from Cheddar. Two water towers are present, one at the Cheddar end, and one at the Axbridge end.
Bristol Water has long identified Cheddar as the site for a new reservoir. In 2007 it announced that the new reservoir would be one of the options considered in its Draft 2009 Water Resources Plan. The new reservoir would hold 6,000 million litres, roughly the same size as the existing reservoir, which it would be based alongside.
In October 2012 survey work started on the new reservoir to the south of the existing one, with a planning application scheduled for December 2013.