Waste and surface water

Waste and surface water in separate systems

The airport area has two separate sewer systems for wastewater and rainwater respectively: the two types of water are not discharged to the same places since the composition of the two types of water is quite different.

Discharge of wastewater to treatment plants
The airport discharges wastewater to treatment plants in the municipalities of Taarnby and Dragør, although most of the water goes to the Taarnby plant. Many different activities affect the composition of the wastewater, which is mostly a result of the following activities:

  • The terminal area (60,000 people per day)  
  • Staff canteens and locker rooms  
  • Maintenance activities such as hangars, auto repair shop and washing facility for vehicles  
  • Production of in-flight meals  
  • Disposal of wastewater from aircraft

Focus on water consumption and conservation
CPH focuses on water consumption: as a result its water conservation measures, the volume of wastewater it discharges has remained at the same level in recent years in spite of an increase in passenger numbers.

CPH continually monitors the volume and quality of its wastewater to ensure it meets regulatory requirements.

Discharge of surface water into the Øresund
About 30% of the airport’s total area of 11.8 square kilometres is paved, i.e. used for car parks, aircraft runways and taxiways, roads and buildings. To ensure that these areas are kept free of rainwater, the airport has an efficient drainage system which keeps rainwater out of wastewater system. This division of the sewer system into two keeps the local wastewater treatment plants from having to handle huge volumes of rainwater.

Surface water quality is monitored
The quality of surface water is affected chiefly by any fuel spills and by de-icers used for aircraft and runways/taxiways. Surface water is discharged into the Øresund after passing through a number of oil separators, which remove any oil the water may contain. The airport must monitor surface water quality in order to ensure that regulatory water quality requirements are met before the water is discharged into the Øresund.

Did you know

that 116 surface water samples are taken each year to monitor quality before discharge into the Øresund.