NOISE pollution from Gatwick would "dramatically" increase and seriously affect homes in Dorking and Betchworth, according to new maps showing potential flight paths.
"Speculative" maps released by the Gatwick Area Conservation Campaign (GACC) show more planes flying directly over both areas if a new runway is built.
Though a legal ban on a second runway at Gatwick forbids any development before 2019, airport chiefs included it in their master plan, which was released earlier this year.
The GACC's maps were created using current flight paths for guidance, and in consultation with a retired air-traffic controller.
"People never talk about where the new flight paths will be until too late," said Brendon Sewill, chairman of the GACC.
"The maps are speculative at the moment, but based on what we believe is accurate.
"One of our members said this might bring home to people the fact that the second runway is going to impact a great many places which are, at the moment, comparatively peaceful."
But Gatwick Airport bosses moved quickly to quash the GACC's suggestions after being contacted by the Advertiser, saying it is far too early to make any assumptions about flight paths for a new runway.
An airport spokesman said: "Gatwick Airport is still in the early stages of carrying out the options work for the Airports Commission.
"As part of these studies we will be looking very closely at the local community impacts, including noise and air quality issues, and how these can be minimised."
The GACC's maps are based on a new runway located just to the north of Crawley, as suggested in the master plan, which would allow for both take-off and landing.
And Mr Sewill has now called on Gatwick to publish its own paths.
He said: "If Gatwick Airport Ltd don't like [the maps] it is up to them to produce their own maps."
