Hi, Ulrich I fully agree with your post. It all depends on the definition for waste water. Is that rejected drink-water or the usually "dark" effluent of a treatment station. Thanks for the data about the Rhein. Certainly, I'm sure I'm nowadays drinking water from there :-).

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Hi, Ulrich

I fully agree with your post. It all depends on the definition for waste water. Is that rejected drink-water or the usually "dark" effluent of a treatment station. Thanks for the data about the Rhein. Certainly, I'm sure I'm nowadays drinking water from there :-).