Low Maynard Reservoir is located in Walthamstow in the London Borough of Waltham Forest.

[1] The storage reservoir is part of the Lee Valley Reservoir Chain and supplies drinking water to London.

[2] Construction of the reservoir was completed in 1870 [3] by the East London Waterworks Company on former marshland.

The reservoir is part of the Walthamstow Reservoirs Site of Special Scientific Interest,[4] and it supports a large concentration of breeding wildfowl.

[5] The fringes of the reservoir contain species of plants uncommon in Greater London, including: Access to the water, which is by permit only, is popular with birdwatchers, walkers and anglers.