|Primary inflows||River Chew|
|Primary outflows||River Chew|
|Basin countries||United Kingdom|
|Surface area||8 acres (3.2 ha) (Lower)
16 acres (6.5 ha) (Upper)
The individual lakes are called Lower Litton and Upper Litton. The former is 8 acres (32,000 m2) in size, the latter 16 acres (65,000 m2) and much deeper. They were built around 1850 by the Bristol Waterworks Company in conjunction with the "Line of Works" to bring water from the Mendip Hills to Bristol.
A public footpath goes around the lakes and across the dam. The banks are home to a variety of flowers including; Primroses (Primula vulgaris), Common Bluebell (Hyacinthoides non-scripta, sometimes Endymion non-scriptus or Scilla non-scripta), Wood anemone (Anemone nemorosa), Violets and Campion. 
Fishing (under permit) is generally for rainbow (Oncorhynchus mykiss, formerly Salmo iridia) and Brown trout (Salmo trutta morpha fario and S. trutta morpha lacustris). Fish breeding takes place in the netted area immediately below the upper dam is the site for fish breeding.
- "Floods and Spillways of the Mendip Supply Reservoirs of the Bristol waterworks Company" (PDF). 1984 Conference. British National Committee on large dams. Retrieved 26 November 2010.
- Vile, N. (1994). Pub Walks near Bristol and Bath. Countryside Books. ISBN 1-85306-274-X.