Southland has a drinking water crisis on its hands, caused by dairy industry pollution
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Only 1% of domestic wells mapped were in areas predicted to have nitrate concentrations below 1mg/L and almost half (49%) were in areas predicted to have concentrations within a range of 3.5 to 8.5mg/L, with a further 5% predicted to exceed 8.5mg/L, with some of these above 11.3mg/L.
The maximum allowable nitrate in drinking water is 11.3mg/L, but the National College of Midwives has warned pregnant women about levels exceeding 5mg/L risking preterm birth and low birthweights and public health academics have said levels below this may be a concern, including as a cause of colorectal cancer.
Ms Prickett said any level above 3.5mg/L was indicative of "serious degradation of environmental health let alone public health".
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