Mount Isa Water Board chief executive Greg Stevens said there had been no significant change to the turbidity of the water recently.

"I have looked at the date and it is very consistant in the last week," Mr Stevens said.

He said any complaints about the water should first be raised with the city council because that is who supplies the water to residents.

QH2O Production manager Neil Barbour said Mount Isa's water should be at its best this time of year.

"When the summer rains come between November and March we have a big influx of mud.

QH2O treats mains water with a series of filters, including multi-media, carbon and reverse ozmosis to remove sediment, plant matter, iron,chlorine and any other impurities which affect the taste and smell.

"Nothing gets through the system,," Mr Barbour said.

Mount Isa Mayor Tony McGrady says he drinks the city's tap water without boiling it.

"We have approx 147,000 m of water mains, 35,000m of trunk mains and unmeasured kilometres of service connections," Cr McGrady said.

"I have been advised that some dirt water problems emanate from low usage such as dead end lines and plumbing crews flush hydrants to remove any settled silt or discoloured water.

"In other areas such as Parkside, crews worked all night to replace worn and faulty valves.

Cr McGrady said he had been advised that such works and the subsequent purging of air from the pipes when recommissioned caused large volumes of water to flow through the network and in turn destabilises silt in the pipes that has built up over a number of years.

"In other areas, emergency repairs caused by main breakages may have similar effect on the water supply, though many of the dirty water complaints once investigated lead back to the property owner's ageing galvanised internal piping," he said.