Australia - Two towns are 48kms apart. One has twice as much tooth decay

For 40 years, dental therapist Jennifer James has had the "unique experience" of treating children in Bathurst, which has fluoride in its water, and 48 kilometres away in Oberon, which doesn't.

“The difference out here working is that you see twice as much tooth decay in children, twice as many fillings, twice as many extractions. That is a comparison we can make weekly in Bathurst and Oberon," said Ms James, who works for NSW Health.

"What people don't see is parents crying because they don't understand why their children need teeth taken out."......................

Is it really as simple and obvious as she believes? 

Population: 35,020 (2016 census)  Bathurst

Population:  2,459 (2011 census) Oberon