"People will be a bit anxious for the first two or three days, and might overestimate how much they need," he said.
"After a few days they will have a better idea, but even so the tanks will need refilling on a very regular basis."
People would be invited to take water in their own (clean) plastic containers, if they had them. Otherwise they would be welcome to use those provided by the council.
"We're not planning to provide every home with multiple new containers though," he added.
CDEM was also organising volunteers trained in providing "psycho-social first aid" for any Kaitaia folk who were not coping.
"A lot of people won't be looking forward to collecting water in this way," he said, "and we want to do everything we can to help them to adjust to a situation that could be upsetting for them. We're hoping the need for an emergency supply doesn't eventuate, but if it does we will be ready to make the best of what will be a bad situation."