Windy, the new 422ft wind turbine which towers over the landscape north of Leicester, should be producing green energy to power a water treatment plant before Christmas.
The mast has been installed at its Wanlip sewage treatment works by Severn Trent Water.
Jon Beeson, renewable energy specialist at Severn Trent Water, said: "It will produce electricity for our business – equivalent to supplying about 1,500 homes with power."
The turbine was ferried to the site in sections on the back of lorries.
The company said it had liaised with residents before work began.
The name Windy was dreamed up by year one pupils at Rothley Primary School.
Mr Beeson said: "We're also working with the community and have donated about £25,000 to good causes in the area.
"As part of this, we are installing solar panels at Rothley community centre and have created a garden at the village hall in Wanlip."
