High in mineral content including boron, magnesium, potassium, chloride and bicarbonate, the Peninsula Hot Springs water comes straight from the earth’s core. Peninsula Hot Springs is a filtration hot spring with surface water estimated to have been deep within the earth for more than 10,000 years.The waters rise from 637 metres below the ground and are classified as true mineral springs. Assessments conducted by the Institute of Geological and Nuclear Sciences in New Zealand support this, concluding that dissolved solids measure over 3, 500 part per million (PPM).