A boil water notice implemented in Glenorchy, after E. coli was detected in the township’s water supply last week, has been lifted.
Queenstown Lakes District Council chief engineer Ulrich Glasner said the action followed a scheduled chlorination.
"With the installation and activation of the chlorination disinfection systems this morning, we are confident that the water in Glenorchy is safe to drink. This is fantastic given the time of year and the influx of visitors expected for the busy summer period."
The discovery, on December 15, came three days after QLDC announced it would begin temporary chlorination of water supplies in Arthurs Point, Luggate and Glenorchy, to ensure a safe drinking supply.
Earlier this week, people were also advised not to swim in Lake Hayes after the bacteria was detected. This was lifted on Wednesday.
Mr Glasner also confirmed council summer chlorination measures were operating from yesterday.
When announced, the decision to use chlorine was met with criticism and Glenorchy residents protested at the council’s December meeting. Council chief executive Mike Theelen said the measures were needed.
"Over the summer period our water system comes under increased pressure and demand due to the high number of visitors in the district. By chlorinating all council-provided water supplies, we can ensure water is safe to drink across the board."
The council had been contacted by the director-general of the Ministry of Health, who advised all drinking water suppliers in New Zealand were to take all steps necessary to protect public drinking water.
While all water supplies will be chlorinated over summer, a decision as to whether it becomes a permanent measure will rest with the council early next year.
