Waikato District Health Board has lost its drinking water accreditation.
International Accreditation New Zealand (IANZ) has confirmed the Waikato District Health Board (DHB) was formally notified on Friday that its accreditation for drinking water had been withdrawn.
Waikato DHB is contracted by the Ministry of Health to monitor 90 drinking water suppliers in the district.
In the meantime the DHB has been given permission from the Ministry of Health to continue to assess the water, but it could no longer associate itself with the IANZ brand.
IANZ chief executive Dr Llewellyn Richards said the organisation would now have to take some corrective actions to sort out the issues before it was reassessed.