Good Practice Guidelines for Chemicals used in Drinking Water Treatment available for use
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Good Practice Guidelines for the supply of polyelectrolytes, aluminium sulphate and hydrated lime for use in drinking water treatment are now available on the Water New Zealand website.
It is incumbent on water operators to ensure that chemicals used in the treatment of drinking water and safe for human consumption. The guidelines provide purchasers, manufacturers, and suppliers with the minimum physical, chemical and testing requirements for drinking water chemicals to meet safe limits. To ensure limits are met all operators should request a certificate of compliance when purchasing chemicals for use in drinking water, in accordance with processes outlined in the guide.
The guidelines replace the previous “Standards for the Supply of Aluminium Sulphate/Hydrated Lime/Polyelectrolytes in Water Treatment”. Updates to the “Standards for the Supply of Chlorine for use in Water Treatment” are under discussion with the Ministry of Health.
Water New Zealand has an interest in the effective implementation of these guidelines. To assist us monitor this, we would appreciate copies of your certificate of compliance and associated lab results. Please send these to: lesley.smith@waternz.org.nz