Projects of ISO/TC 147/SC 4/WG 30

DIN EN ISO 9308-4 2023-05-29 Water quality - Enumeration of Escherichia coli and coliform bacteria - Part 4: Membrane filtration method for Escherichia coli in water with high levels of background bacteria (ISO/DIS 9308-4:2025); German and English version prEN ISO 9308-4:2025 More  Comment 
ISO/DIS 9308-4 2023-02-01 Water quality - Enumeration of Escherichia coli and coliform bacteria - Part 4: Membrane filtration method for Escherichia coli in water with high levels of background bacteria More  Comment 

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