A historic Georgian house has issued a warning over a potential environmental risk affecting visitors.
Upton Country Park has issued an "important visitor notice" following concerned public reports of water discolouration within the grounds of the property.
According to the notice, visitors alerted staff after noticing that the water had turned a "milky colour".
Upton Country Park
Upton Country Park confirmed this had previously been understood as a "naturally occurring incident" caused by "sugars being released from the vegetation".
The BCP Council managed property states the latest episode has been referred to the Environment Agency to establish the exact cause.
As a precautionary measure, Upton Country Park has asked visitors to keep children and dogs away from the water until investigations are complete and the water is running clear again.
Upton Country Park, Poole Road in July 2026 (Image: Simon Gregory, Dorset Camera Club)
A spokesperson for the Environment Agency said: “Officers have been to Upton County House and Park to investigate reports of pollution.
“The situation has improved overnight, but signs of some discolouration remain."
It confirmed that samples of the water have been taken, and it is "closely monitoring for any impact on the environment" while the investigation continues.
Councillor Richard Herrett, BCP Council cabinet member for destination, leisure and commercial operations, said: “Upton Country Park is one of our most valued green spaces, and the safety of residents and visitors is always our top priority.
“We are aware of the discolouration affecting the water and understand the concern this may cause for visitors.
"The incident was confined to an isolated section of the stream, and the country park and its facilities remain open.
“The matter has been reported to the Environment Agency and investigations are underway to determine the cause.
"As a precaution, we are advising visitors to keep children and dogs out of the water until more information is available.
“We are working closely with our partners to monitor the situation and will provide updates as soon as we can.
"In the meantime, we would like to thank residents and visitors for their patience and cooperation.”
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