Chlorothalonil and the filter technology from FEWATEC


The FEWATEC Cristal water filter removes chlorothalonil.

Chlorothalonil was one of the 10 most sold fungicides in Switzerland for years.

It was used as a broad-spectrum fungicide on agricultural as well as non-agricultural land (e.g. golf courses).

In 2019, the Swiss population became aware of the contamination of individual drinking water samples with this fungicide. In the drinking water samples complained about, the measured values of the detected chlorothalonil metabolites were above the legal limit of 0.1 µg/litre. The use of chlorothalonil has been banned in Switzerland since 1 January 2020.

Attention: Due to an interim ruling of the Federal Administrative Court (FAC) of 24 August 2020 and 15 February 2021, the following situation applies until the main ruling of the FAC:

There is no longer a maximum level for chlorothalonil degradation products in drinking water.
Officially collected drinking water samples with a concentration of chlorothalonil degradation products of more than 0.1 micrograms per litre will no longer be objected to.
Drinking water suppliers are no longer obliged to test the water for chlorothalonil residues.


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