The sediment around Westerdok, Bickerseiland and Prinseneiland is contaminated. This is apparent from research by the Amstel, Gooi and Vecht water board. The GGD has analyzed the measurement data and advises against swimming. The water bottom can prevent health risks for swimmers.

The water board has been investigating the bottom of the canals around Prinseneiland, Bickerseiland and Westerdok since the beginning of this year. Excessively high concentrations of minerals, heavy metals, pesticides and PAHs were found in the bottom sludge. This contamination in the water bottom was caused by the old industry on and around the canals.

Not . swimming

The GGD advises against swimming in the water around Prinseneiland, Bickerseiland and Westerdok. When people swim in the water, they can woolen the bottom. Especially in places where it is less deep, orphans can end up in the water. Swimmers can come into contact with contaminated bottom sludge. For example, due to the sludge coming into contact with the skin, or by accidentally swallowing water. This can have negative effects on health.

Short and warning signs

The water around Prinseneiland, Bickerseiland and Westerdok is not an official bathing water. Therefore, the water quality is not monitored here. For this reason, and because boats are sailing, swimming in this water is not recommended. Due to the recent research results, residents of the Western Islands have received a letter about the polluted water bottom. We also place warning signs at locations where swimming is allowed in warm weather.

Research not ready yet

The water bottom investigation is not yet finished. Once the investigation has been completed, it will be determined whether the contaminated sediment can be tackled. For more information about aquatic soil research, see www.agv.nl/waterbottom research†