"It seems to show higher levels of manganese, but you would still have to drink many cups of water over a long time frame to have any long-term effects."
They said council would not expect people to drink dirty water which occurs during maintenance, and recommends flushing the cold water taps if water is dirty, and if the problem persists, to contact council immediately.
Some council testing done on discoloured water had shown elevated levels of manganese. The spokesperson said usual water from the public water supply was compliant with New Zealand's drinking water standards.
Dr Nicholas Jones from Hawke's Bay District Health Board said they had no evidence suggesting clear water had elevated levels of manganese, and supported Napier City Council's advice to run the taps until water was clear.
He said recent tests showed manganese levels were with the Ministry of Health's guidelines, however the DHB had asked Napier City Council to increase the frequency of its water testing.
He said if anyone had consumed dirty water and were anxious about it, to go see their GP, however he thought there was a low risk of anyone experiencing adverse health effects.