A coroner has confirmed Havelock North's water contamination resulted in the death of pensioner Jean Sparksman.
She was found dead at a Mary Doyle Lifecare Complex apartment in Havelock North on August 13, 2016. She was 89.
Coroner Peter Ryan says in his report he is satisfied that she died "as a result of becoming infected with campylobacter in a background of coronary artery disease and appendiceal tumour".
But the artery condition had not been discovered at the time she had been taken ill a few days before her passing, and the coroner says she did not seek medical attention, possibly with a "false sense of security" generated by the serviced-apartment and monitored environment in which she lived a short distance from the Havelock North village centre.
"Although she was monitored by caregivers on a regular basis, these people were not qualified nor expected to assess the extent of her illness," he said.