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An aerial photo of the Tiwai Point aluminium smelter with Bluff township and Bluff Hill in the backdrop.
The Ministry for the Environment says it is unclear whether Rio Tinto is under any legal obligation to remediate the site of its smelter at Tiwai Point after it closes. The smelter says it is currently conducting an extensive Closure Study to understand any environmental impacts on the Tiwai Point site and to ensure that the operation will be closed in a responsible manner. In January, New Zealand s Aluminium Smelter announced the site would stay open for four more years, after it announced in July last year it would close in August 2021.