If an event (for more than 24 people) is offering the public drinking water that is not commercially bottled, and you are not a self-supply, then it may require permission from the Medical Officer of Health to be used. The event organiser will need to check by contacting their local Drinking Water Team (DWT) based at Nelson Marlborough District Health Board's Public Health Service (NMDHB PHS).
Contact the Public Health Service:
Phone: Nelson/Richmond (03) 546 1537
For more information visit the Drinking Water page on the Nelson-Marlborough Health website