Water and Sewerage Authority officials have issued a warning after blue green algae was discovered in the Clypse Reservoir.
Although algal blooms aren’t always harmful, say some can be toxic and visitors to the reservoir are advised to avoid contact with the water.
Pet owners are also being urged not to allow their animals to drink from it.
Sailings altered as 'ongoing dredging issues' lead to 'insufficient water depths in Douglas port'
Steam Packet makes changes to Manxman's timetable over the coming days
Manx Care asks all GPs to formally adopt Jess's Rule
Follows MHK's question in the House of Keys
Government 'taking rising fuel prices seriously'
Chief minister gives update in the House of Keys
Motion to sell Old Castletown Police Station to be put before Tynwald
The Baillie Scott building's been owned by Manx National Heritage since 2018
DOI issues 'final' offer to bus drivers
Unite members have just concluded fifth round of strike action