The Candover Brook is a 1.2 km chalk

Chalk

Chalk is a soft, white, porous sedimentary rock, a form of limestone composed of the mineral calcite. Calcite is calcium carbonate or CaCO3. It forms under reasonably deep marine conditions from the gradual accumulation of minute calcite plates shed from micro-organisms called coccolithophores....

 stream in the English

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

 county of Hampshire

Hampshire

Hampshire is a county on the southern coast of England in the United Kingdom. The county town of Hampshire is Winchester, a historic cathedral city that was once the capital of England. Hampshire is notable for housing the original birthplaces of the Royal Navy, British Army, and Royal Air Force...

. It is a tributary of the River Itchen

River Itchen, Hampshire

The River Itchen is a river in Hampshire, England. It flows from mid-Hampshire to join with Southampton Water below the Itchen Bridge in the city of Southampton. The river has a total length of , and is noted as one of England's - if not one of the World's - premier chalk streams for fly fishing,...

, which it joins near the town of New Alresford

New Alresford

New Alresford or simply Alresford is a small town and civil parish in the City of Winchester district of Hampshire, England. It is situated some 12 km north-east of the city of Winchester and 20 km south-west of the town of Alton...

. The stream rises from springs just to the south of the village of Preston Candover

Preston Candover

Preston Candover is a village and large civil parish in Hampshire, England. It has two churches, only one of which is still in use. Its nearest town is Basingstoke, approximately away...

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It is one of the few rivers remaining in southern England that is home to the endangered native white-clawed crayfish

Austropotamobius pallipes

Austropotamobius pallipes is an endangered European freshwater crayfish, and the only species of crayfish native to the British Isles. Its common names include white-clawed crayfish and Atlantic stream crayfish.-Distribution and ecology:...

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Candover Brook is part of the Itchen Valley Countryside Heritage Area recognising the distinctive features and biological richness of this area.