The River Colne /ˈkoʊn/ in West Yorkshire is formed at the confluence of two brooks that originate in the Pennines close to Marsden.

Brooks formed by rainwater high (between 300 and 480 metres AMSL) in the Pennines of West Yorkshire, flow down the hillsides through the small valleys known locally as cloughs to fill March Haigh and Redbrook Reservoirs.

The Haigh Brook and Redbrook continue down the valley fed by more tributaries, until they converge at a scenic spot called Close Gate or Eastergate Bridge where the River Colne is formed.

There are numerous factories, warehouses and plants along the river providing goods, services and jobs, but a few of these cause pollution to the local environment and waterways.

[8] In order to help tackle pollution, the Environment Agency demand that certain standards be met by local companies.