Swimmers who were caught climbing a reservoir wall before diving headfirst into the water received a stern warning from police – and some free health advice in case any of them were contemplating fatherhood.
The young men were confronted by officers at Staunton Harold Reservoir, near Ashby, at the weekend after reports were received of people larking about at the beauty spot.
Severn Trent Water, which owns and manages the site, just over the Leicestershire border, has previously raised safety concerns about people swimming in its reservoirs.
Officers said it was only when told the high alkaline levels in the water could make them infertile did the men decide to co-operate and leave the water, reports DerbyshireLive.
Derbyshire Police said the men had ignored several warning signs prohibiting members of the public from jumping into the water as they made their way through the site.
The Etwall, Hatton and Hilton Police Safer Neighbourhood Team (SNT) said they were aghast at seeing eight men diving head-first into the water.
A spokesperson for the team said: “The flushed men, who had travelled to the in-vogue venue from Chaddesden and Oakwood, were at first gobsmacked to see officers approaching them.”
They added: “Eye-brows were raised and shoulders were shrugged as they were admonished for frolicking in the waters.
“Officers explained the dangers of the very cold and deep water, which contains many unseen obstacles below, but this still didn’t appear to raise their full attention.
“When officers explained that rangers at the reservoir had advised of the potential impact on lower reproductive parts due to the presence of significant concentrations of alkaline in the water, they quickly became animated.”
Officers said the group were then invited to the police station, where police gave out “a record-breaking number” of community protection notice warnings.
“All eight male members received individual warnings, ordering them not to enter reservoir waters in the future,” it said.
“The warning notice lasts for 12 months, and if not adhered to can result in a full notice, which carries criminal sanctions and fines.”