Queenstown is waiting on a final signoff before lifting the town's boil water notice.

Businesses and residents have been required to boil tap water for almost three months, after a breakout of cryptosporidium.

UV treatment equipment has been installed at the Two Mile water supply.

Mayor Glyn Lewers says all they need now is water regulator Taumata Arowai to give the green light.

"We've done our bit by putting in the UV disinfection area, we've flushed the system, we've cleaned the tanks- so yeah, we're just waiting."

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