Standard Test Method for Determination of Per- and Polyfluoroalkyl Substances in Water, Sludge, Influent, Effluent, and Wastewater by Liquid Chromatography Tandem Mass Spectrometry (LC/MS/MS)
Edition 2020

German standard methods for the examination of water, waste water and sludge; bio-assays (group L); surfactant biodegradation and elimination test for simulation of municipal waste water treatment plants (L 26)
Edition 1994-05

Water conditioning equipment inside buildings - Active media filters - Requirements for performance, safety and testing; German version EN 14898:2006+A1:2007
Edition 2007-09

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

Small wastewater treatment systems for up to 50 PT - Part 7: Prefabricated tertiary treatment units; German version EN 12566-7:2016
Edition 2016-12

Small wastewater treatment systems for up to 50 PT - Part 6: Prefabricated treatment units for septic tank effluent; German version EN 12566-6:2016
Edition 2016-12

Water conditioning equipment inside buildings - Membrane separation devices - Requirements for performance, safety and testing; German version EN 14652:2005+A1:2007
Edition 2007-09

Wastewater treatment plants - Part 6: Activated sludge process; German and English version prEN 12255-6:2021
Edition 2021-07

Water quality - Test for inhibition of oxygen consumption by activated sludge for carbonaceous and ammonium oxidation (ISO 8192:2007); German version EN ISO 8192:2007
Edition 2007-05

Wastewater treatment plants - Part 16: Physical (mechanical) filtration; German version EN 12255-16:2005
Edition 2005-12