Water quality - Determination of trace elements using atomic absorption spectrometry with graphite furnace (ISO 15586:2003); German version EN ISO 15586:2003
Edition 2004-02

Water quality - Determination of cadmium by atomic absorption spectrometry (ISO 5961:1994); German version EN ISO 5961:1995
Edition 1995-05

Water quality - Determination of the acute lethal toxicity of substances to a freshwater fish [Brachydanio rerio Hamilton-Buchanan (Teleostei, Cyprinidae)] - Part 2: Semi-static method (ISO 7346-2:1996); German version EN ISO 7346-2:1997
Edition 1998-03

Water quality - Determination of biochemical oxygen demand after n days (BODₙ) - Part 2: Method for undiluted samples (ISO 5815:1989, modified); German version EN 1899-2:1998
Edition 1998-05

Water quality - Determination of nitrogen - Part 1: Method using oxidative digestion with peroxodisulfate (ISO 11905-1:1997); German version EN ISO 11905-1:1998
Edition 1998-08

Water quality - Determination of the acute lethal toxicity of substances to a freshwater fish [Brachydanio rerio Hamilton-Buchanan (Teleostei, Cyprinidae)] - Part 1: Static method (ISO 7346-1:1996); German version EN ISO 7346-1:1997
Edition 1998-03

Water quality - Determination of chromium(VI) - Method using flow analysis (FIA and CFA) and spectrometric detection (ISO 23913:2006); German version EN ISO 23913:2009
Edition 2009-09

Water quality - Detection and enumeration of Pseudomonas aeruginosa - Method by membrane filtration (ISO 16266:2006); German version EN ISO 16266:2008
Edition 2008-05

Water quality - Determination of orthophosphate and total phosphorus contents by flow analysis (FIA and CFA) - Part 1: Method by flow injection analysis (FIA) (ISO 15681-1:2003); German version EN ISO 15681-1:2004
Edition 2005-05

Water quality - Toxicity test for assessing the inhibition of nitrification of activated sludge microorganisms (ISO 9509:2006); German version EN ISO 9509:2006
Edition 2006-10