... report, by the Environment Agency, the Scottish Environment Protection Agency (SEPA) and the Coal Authority, sets out the nature and scale of the problem in England, Wales and Scotland today, the ... to the iron and steel manufacturing industry; ii Science Report – Abandoned mines and the water environment The Environment Agency is the leading public body protecting and improving the environment ... raise the pH and cause the metals to form insoluble compounds such as oxyhydroxides and carbonates. These settle out with the help of a chemical flocculant and the treated water overflows to the...