Ten small-scale wind turbines have been installed at a waste water treatment works to help reduce energy costs.
In the first project of its kind in Scotland, Scottish Water's 'Evance' turbines in Stornoway are capable of generating 500 kilowatts of electricity per day.
Eddie Johnstone, project manager with Scottish Water's Energy Team, said: "We're delighted that this project in Stornoway has come to fruition and I hope this wind project will be the first of many similar projects that will enable Scottish Water to reduce its dependency on the grid.
"We are looking to take advantage of the Western Isles' natural wind resource to assist in reducing Scottish Water's energy costs."
He said Scottish Water needed "a significant amount of energy to provide services to the people of Scotland", and it wanted to produce "more of our own power to reduce our energy bill".
Mr Johnstone added: "We want to do this for the benefit of our customers, while helping to meet Scotland's renewable energy targets.
"Small-scale wind development at our treatment works, such as Stornoway, is one of the ways we can achieve this."
Scottish Water generates around 7% of the energy it consumes and is looking at the potential for further schemes across its network.
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