DIN - German Institute for Standardization

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Hydrogen Technologies Standards form the basic framework for market ramp-up
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Climate change Standards and specifications support climate targets
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Draft technical rule

DVGW W 551-1
Hygiene in Potable Water Installations – Part 1: Prevention, Identification of Causes and Control Measures of Contamination with Legionella

Title (German)

Hygiene in der Trinkwasserinstallation – Teil 1: Prävention, Ursachenklärung und Beseitigung von Kontaminationen mit Legionellen

Edition 2026-05

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

DVGW W 551-1 Hygiene in Potable Water Installations – Part 1: Prevention, Identification of Causes and Control Measures of Contamination with Legionella

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DVGW W 551-1
Hygiene in Potable Water Installations – Part 1: Prevention, Identification of Causes and Control Measures of Contamination with Legionella