93.025 External water conveyance systems

Plastics piping systems for hot and cold water installations - Polyethylene of raised temperature resistance (PE-RT) - Part 5: Fitness for purpose of the system - Amendment 1 (ISO 22391-5:2009/Amd 1:2020, Corrected version 2021-03)

Activities relating to drinking water and wastewater services — Guidelines for the management of drinking water utilities and for the assessment of drinking water services

Service activities relating to drinking water supply, wastewater and stormwater systems — Examples of good practices for stormwater management