A bloom of poisonous algae has been found on Harmers Reservoir in Alexandra Park.
Blue-green algae has been spotted in the reservoir and Hastings Borough Council has closed access to the reservoir as a precaution.
The council’s lead member for environment, leisure and amenities Warren Davies said: “Algal blooms are a natural occurrence when temperatures are high and oxygen levels low in waters.
“It’s possible the bloom may remain all summer and it’s also feasible it could disappear quickly when the temperature drops and there is an increase in water moving through the reservoir due to rain.
“Blue-green algae can sometimes produce a toxic substance that can affect humans and animals, including dogs, should they come into contact with it.
“In consultation with the Environment Agency, we have taken the precautionary measure of closing access to Harmers Reservoir until further notice and residents are advised to keep their dogs away from the water.
“Brown algae is also currently present in the boating lake at the park and whilst it’s unsightly, it’s not toxic.
“This will also disappear of its own accord once the environmental conditions change and is of no danger to dogs and other animals.
“We will continue to monitor the reservoir and other water bodies in the park and will seek regular guidance from the Environment Agency.”
Alexandra Park is a Grade II Park of Historic Interest and has regularly received the prestigious Green Flag Award.
This national award, handed out by environmental charity Keep Britain Tidy, recognises and rewards the best parks and green spaces across the country.
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