Sea Water

Samples of sea water are taken at three depths - the upper level (a few metres underneath the surface), the middle level and the lower level (several metres above the seabed). They are sampled annually at four sampling locations in the eastern part of the coastal waters of Hong Kong. Particulates in the sea water are collected by filtering the sea water samples through a membrane filter. Measurements of the radioactivity of these samples are carried out at the Radiation Laboratory at King's Park.