Pigments and extenders – Dispersion procedure for sedimentation-based particle sizing of suspended pigment or extender with liquid sedimentation methods (ISO 20427:2023); German version EN ISO 20427:2024
Edition 2024-10

Service activities relating to drinking water supply systems and wastewater systems - Guidelines for benchmarking of water utilities (ISO 24523:2017)
Edition 2018-03

Natural stone - Denomination criteria; German version EN 12440:2017
Edition 2018-01

Pigments and extenders - Dispersion procedure for sedimentation-based particle sizing of suspended pigment or extender with liquid sedimentation methods (ISO/DIS 20427:2025); German and English version prEN ISO 20427:2025
Edition 2025-06

Activities relating to drinking water and wastewater services - Guidelines for the assessment and for the improvement of the service to users
Edition 2012-03

Activities relating to drinking water and wastewater services - Guidelines for the management of drinking water utilities and for the assessment of drinking water services
Edition 2012-03