Concerns have been raised over high levels of calcium and possible contamination in the water lens under Niue.
This comes as Niue starts exporting bottled water from the aquifer to New Zealand and United States.
The island does not have the facilities for extensive water quality tests and while tests have reportedly been done in New Zealand they have not been made public.
MP Terry Coe is worried poor quality water is being exported and he told Eleanor Wenman he fears what could be hidden in the aquifer.
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