Heathrow Airport Northwest Runway: map of potential noise changes (updated October 2017)

Interactive map of potential local noise changes from a Northwest Runway at Heathrow Airport (including some environmental designations around the airport). Enter your postcode into the online map to see some of the potential noise changes from a proposed Northwest Runway at Heathrow Airport. The search is limited to a range of representative postcodes within the vicinity of Heathrow Airport. Not all neighbouring postcodes are included.

Note: the information is illustrative only, based on indicative flightpaths, and should not be relied upon as it may be subject to change. These could include changes in passenger demand data, the introduction of potential noise mitigation measures and advancements in aviation technologies, including aircraft design. These indicative noise contours are based on the Department’s central aviation demand forecast which is just one possible future scenario. Further information on this can be found HERE in the Department’s Updated Appraisal Report.

Final flightpaths for a proposed Northwest Runway scheme will be subject to more detailed design, assessment and consultation by the promoter later in the development process.

All information related to the further consultation on the revised draft Airports National Policy Statement is available HERE

  • 2015 day noise contour

    Day noise is measured in decibels (dB) LAeq which represents the average sound level over the 16 hour day period (07:00-23:00).

    54 dB
    57 dB
  • 2016 24-hour noise contour

    24-hour noise is measured in dB Lden. This is the same as 24-hrLAeq calculated for an annual period, but with a 5dB weighting for evening (19:00-23:00) and a 10dB weighting for night (23:00-07:00) to reflect people’s greater sensitivity to noise within these periods.

    55 dB
  • 2030 two runways day noise contour
    54 dB
    57 dB
  • 2030 two runways 24-hour noise contour
    55 dB
  • 2030 day noise contour with Northwest Runway designed to minimise the total number of people affected
    54 dB
    57 dB
    60 dB
  • 2030 24-hour contour with Northwest Runway designed to minimise the total number of people affected
    55 dB
  • 2030 day noise contour with Northwest Runway, designed to minimise the number of people newly affected
    54 dB
    57 dB
    60 dB
  • 2030 24-hour noise contour with Northwest Runway, designed to minimise the number of people newly affected
    55 dB
  • 2030 day noise contour with Northwest Runway, designed to maximise respite by flightpath alternation
    54 dB
    57 dB
    60 dB
  • 2030 24-hour noise contour with Northwest Runway, designed to maximise respite by flightpath alternation
    55 dB
  • Outer boundary, masterplan
  • Principal environmental designations in the vicinity of Heathrow