Soil quality - Percolation rate of water from the soil
Edition 2011-08

Concrete for prefabricated sewage units - Manufacture, requirements, testing and quality control
Edition 1998-08

Drainage of landfills - Design, construction and operation
Edition 2015-08

Wastewater treatment plants - Part 12: Control and automation; German version EN 12255-12:2003
Edition 2003-12

Wastewater treatment plants - Part 11: General data required; German version EN 12255-11:2001
Edition 2001-07

Wastewater treatment plants - Part 6: Activated sludge process; German version EN 12255-6:2002
Edition 2002-04

Wastewater treatment plants - Part 7: Biological fixed-film reactors; German version EN 12255-7:2002
Edition 2002-04

Wastewater treatment plants - Part 13: Chemical treatment; Treatment of wastewater by precipitation/flocculation; German version EN 12255-13:2002
Edition 2003-04

Wastewater treatment plants - Part 3: Preliminary treatment (includes corrigendum AC:2000); German version EN 12255-3:2000 + AC:2000)
Edition 2001-03

Wastewater treatment plants - Part 5: Lagooning processes; German and English version prEN 12255-5:2022
Edition 2022-03