GREEN watchdogs launched an investigation in Bolsover after wildlife lovers spotted discoloured water and dead fish at a beauty spot.
The Environment Agency has been looking into concerns at the Peter Fidler Reserve, near Station Road, where 20 fish were found dead and it is also examining the nearby River Doe Lea where a blue substance has been spotted.
An Environment Agency spokesman said: “The 20 dead fish were discovered in a pond which is not connected to other water sources but there are too few dead fish to justify a test and we’ve not received further reports so we’re assuming there are no more problems.
“Separately, but in the same area we’ve also discovered a blue tinted liquid in the River Doe Lea and we’re talking to Yorkshire Water as part of this investigation because we understand there is sewerage works nearby.”
Derbyshire Wildlife Trust oversees the Carr Vale Nature Reserve which is bordered by the River Doe Lea and it told how it was alerted to problems in the river by a resident on November 9.
Trust volunteer Mark Beevers said he had been looking for a source for the River Doe Lea’s coloured discharge and that there were also problems at the Peter Fidler Reserve where gulls had been feeding off dead fish.
Derbyshire County Council which runs the Peter Fidler Reserve has also been alerted.
A trust spokesman said: “We’re aware of problems and we’re waiting for the Environment Agency’s results.”
Residents raised concerns about the trust’s Car Vale Nature Reserve during May this year after vandals spoiled the area with dangerous camp fires, litter and fishing lines. Yorkshire Water said it stopped a minor discharge into the River Doe Lea which occurred after an issue at its Bolsover works. It added that no clean up was required and checks were carried out to ensure fish were not in danger.