people are being advised to stay away from a Renfrewshire dam following the discovery of toxic bacteria.
Tests have confirmed the presence of blue-green algae - which can cause serious health problems for both humans and animals - at Houstonhead Dam.
Those who come into contact with the cyanobacterial blooms can experience symptoms such as skin irritation, sickness and diarrhoea.
Experts at the Scottish Environment Protection Agency (SEPA) have said members of the public should not go near the water at the dam, on the outskirts of Bridge of Weir
A SEPA spokesman added: “We can confirm that a water sample collected on July 14 was analysed by SEPA and tested positive for potentially-toxic cyanobacteria, or blue-green algae, in high abundance.
“Cyanobacteria samples are not routinely tested for toxicity because, even if non-toxic when tested, blue-green algae blooms can rapidly become so.
“The safest approach is to manage any potential contact with blooms, on the assumption that they may be toxic.
“We are continuing to undertake further investigation into potential sources of nutrient input to the loch, as excessive nutrients are recognised as a contributing factor to the occurrence of cyanobacterial blooms.”
Renfrewshire Council is also taking action.
A spokesperson said: “We were notified by SEPA that the Houstonhead Dam was affected by blue-green algae after tests were conducted on water samples.
“The council has a duty to ensure landowners take action to inform users of the water of the incident, as well as members of the public through erection of signage at the site.
“We have notified the landowner and a local fishing club that uses the water have been informed by SEPA.
“We will continue to monitor the dam and test water samples until the situation is resolved.
“Some forms of blue-green algae can cause adverse health effects for humans and animals.
“Contact and ingestion of water affected by algal blooms should therefore be avoided.”
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