Needed Information about ISO Standards for Drinking, Surface and Wastewater.

01 January 1970 0 3K Report

Hello,

As far as I know ISO standards need to be paid for to be available for usage. Does anyone know of any free versions? Or at least if paid for, which of those ISO guidelines/standards would be the ultimate best one to buy (also most updated) that contains standards for chemicals present in drinking, surface and wastewater?

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