The extraordinary number of pollution threats faced by individual water courses in the UK can now be identified on an online map published by the not-for-profit journalism team at Watershed Investigations.

The multi-layered map contains more than 120 datasets, sourced from freedom of information requests and environmental information regulations. Direct the cursor to the river or lake that interests you and the map will reveal information about water health status, historic landfill sites, sewage dumping, heavy industry, forever chemicals, National Highways outfalls, the intensity of cattle, pig and chicken farming, hydro schemes, the level of economic deprivation, flood risk, nuclear facilities and the political party of the local MP.

Watershed Investigations are supported by, among others, Wildfish and The Wildlife Trusts. Angler and clean-water campaigner Feargal Sharkey sits on its advisory board.

Visit watershedinvestigations.com