The Environment Agency has launched an investigation after part of a stream was turned neon blue.
The agency tweeted a picture on Friday (August 9) of the stream near Frome, one of the tributaries of the River Frome itself, which showed the shocking colour of the water following a 'pollution incident'.
A spokesperson for the agency has today confirmed that tests were ongoing to investigate the source of the water's strange hue. The water is now believed to have returned to its usual colour, with the majority of the pollutant reportedly having been removed.
There have been no reports of dead or distressed wildlife or fish in the area, and the water in the stream is not believed to present any hazard to pets.
Environment Agency spokesperson Paul Gainey said: "The Environment Agency is investigating why a tributary of the River Frome in Somerset has turned bright blue.
"The agency sent field teams to the scene yesterday to carry out tests and take water samples in a bid to establish the cause.
"There are no reports of dead or distressed wildlife or fish at this stage.
"Water samples taken have been sent to the Agency laboratories for tests and the results are expected on Monday.
"Agency officers continue to monitor the stream today. A field team is on standby and a plan in place should the Environment Agency need to do any further clean-up in the tributary."
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