Queenstown's new UV filter is expected to arrive next week, and is still on track to be installed and commissioned by December 8.
Queenstown Lakes District Mayor Glyn Lewers said the containerised system, from the Waimakariri district, was being fitted out, out of district, contractors beginning site preparation at the Two Mile Delta this week.
Once the container arrived, there would be a bit more groundwork required to connect it to Queenstown’s network before it was commissioned by regulator Taumata Arowai.
"We’re working through that now," Mr Lewers said.
While the exact cost of the UV filter and its installation was still unknown, it could cost between $5 million and $10m, he said.
"Obviously, we’re doing it at pace — making sure we get the costs right and doing it correctly is at the forefront of our minds.
"The bespoke work, when the container turns up, that’ll probably be where we incur a little bit more cost than we expected, but that’s just the nature of construction when you’re doing it at pace," Mr Lewers said.
Once commissioned, it will spell the end of the "boil water" notice put in place for Queenstown on September 18 due to a cryptosporidium outbreak.
About 60 cases were reported to health authorities after the notice was introduced.
The boil water notice was lifted at Kelvin Heights, which also supplies Frankton and Hanley’s Farm, on October 5.
