Pollution colours Washington stream blue and green
Businesses on Wearside are being targeted in a bid to tackle pollution which has been colouring a nature reserve's stream.
It follows a number of incidents of Barmston Burn turning green and blue.
The Environment Agency believes it is caused by businesses disposing of oils, paints and solvents down surface water drains which go straight into the burn.
Officers will be visiting about industrial premises in the Washington area to raise awareness of the problem.
The stream runs through the runs through the Wildfowl and Wetlands Trust Washington Wetland Centre.
Rob Carr, from the Environment Agency, said: "It is against the law to pollute watercourses by putting waste down surface water drains.
"This can cause significant problems, not only to how the watercourse looks, but also cause odour and impact on wildlife.
"We will talk to businesses from the estates to see if they can change how they work and make improvements before deciding if any further action is necessary."