DIN - German Institute for Standardization

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Hydrogen Technologies Standards form the basic framework for market ramp-up
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Draft standard

OENORM EN ISO 9308-4
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)

Title (German)

Wasserbeschaffenheit - Nachweis und Zählung von Escherichia coli und coliformen Bakterien - Teil 4: Membranfiltrationsverfahren für Wässer mit hoher Begleitflora (ISO/DIS 9308-4:2025)

Edition 2025-12-15

Original language German

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Hydrogen Technologies Standards form the basic framework for market ramp-up

Climate change Standards and specifications support climate targets

OENORM EN ISO 9308-4 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)

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OENORM EN ISO 9308-4
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)