The main purpose of this Guide is to provide purchasers, manufacturers and suppliers with the minimum requirements for hydrofluosilicic acid, sodium fluoride and sodium silicofluoride, including physical, chemical and testing requirements.
This document was written to provide a brief overview of water supply modelling activities, intending to present some principles of 'Good Modelling Practice', for people involved in undertaking and managing water supply modelling projects.
This document provides guidelines for accounting for methane (CH4) and nitrous oxide (N2O) emissions from municipal wastewater treatment, discharge and sludge processing in New Zealand. Emissions from on-site septic tanks are also covered.
This Guide covers requirements for ensuring liquefied chlorine gas (commonly known as liquid chlorine) sodium hypochlorite and calcium hypochlorite are of a suitable quality for use in drinking water treatment.
The demands and expectations of New Zealand wastewater networks systems are increasingly coming under pressure, in some situations the traditional gravity sewer network is no longer the best solution to provide communities the public health benefits that a wastewater network provides.
The 4 edition of the New Zealand Gravity Pipe Inspection Manual incorporates the evolution of pipeline inspection and the changing requirements of the water industry since the publication of the 3 Edition in 2006.