Research and analysis

Abandoned metal mines in England: baseline length of rivers and estuaries polluted by harmful metals

How the Environment Agency has determined the baseline length of rivers and estuaries polluted by harmful metals from abandoned metal mines in England.

Applies to England

Documents

Details

The government’s Environmental Improvement Plan (2023) stated that abandoned metal mines are the largest source of metal pollution to English rivers and into the marine environment. In 2023, a statutory target was set to halve the length of rivers and estuaries polluted by target substances from abandoned metal mines by 31 December 2038 against the baseline polluted length in 2022.

The target substances are:

  • arsenic
  • cadmium
  • copper
  • lead
  • nickel
  • zinc

This report explains how the Environment Agency has determined the baseline length of rivers and estuaries polluted by any of the target substances from abandoned metal mines as required under the Environmental Targets (Water) (England) Regulations 2023.

Updates to this page

Published 12 March 2025

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