Health expert renews call for study on nitrates in drinking water – RadioNZ

Water tap running.

A US study has found 2300 to 12,594 nitrate-attributable cancer cases annually in the country, of which 54-82 percent are colorectal cancer cases.

Nitrates get into the water supply through the use of fertiliser and effluent from farm animals, and because it is a highly soluble chemical and not removed by normal filtration it can seep deep into aquifers.

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