Contact details
The site is operated by the Mining Remediation Authority as part of the Water & Abandoned Metal Mines (WAMM) Programme. The WAMM Programme is a partnership between the Mining Remediation Authority, the Environment Agency and Defra (Department for Environment, Food and Rural Affairs).
You can contact us by:
Email: nent@miningremediation.gov.uk
Phone: 0345 762 6848
Post: WAMM Programme – Nent, 200 Lichfield Lane, Mansfield, Nottinghamshire, NG18 4RG.
In case of emergency, please contact: 0800 288 4242
In line with the approved planning permission the scheme started operating in September 2024 with just one of its three treatment ponds operational. In October 2025 all three treatment ponds were operational.
January 2026 update
- The mine water treatment scheme is working very well to remove metals from the mine water, and no nuisance odours have been observed or reported.
- Treatment Pond 1 started operating in September 2024: more than 90% of the zinc and cadmium is being removed between the adit (the drainage tunnel dug by the miners) and the discharge from this pond.
- Treatment Ponds 2 and 3 started operating in October 2025: already, more than 80% of the zinc and cadmium is being removed between the adit and the discharge from these ponds. We expect this performance to improve over the next few months as the treatment layer matures.
- The treatment scheme is now treating all the mine water flow from the Haggs adit to a maximum of 10 litres per second.
In the first 12 months, the scheme has prevented about 1 tonne of zinc and cadmium from polluting the river, by treating about 100 million litres of contaminated mine water. With all three ponds operating, the treatment capacity is now about 300 million litres per year. We expect the scheme to remove at least 90% of the zinc and cadmium found in the mine water, releasing clean water back into the River Nent.