A local principal says schools see first-hand the "detrimental effects of not having fluoride in Rotorua water".
John Paul College principal Patrick Walsh said he had seen many Rotorua students requiring root canals, extractions, and lots of fillings, at a young age.
"I have been in education for 30 years and have had no reports of detrimental effects of fluoride on the health of children.
"We've had students from Auckland and Hamilton come to our school and they have gleaming white, strong teeth compared with the teeth of many Rotorua students."
Mr Walsh said buying fluoride tablets was "hugely inconvenient" for families who then had to remember to administer the pills.