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Iqaluit's water treatment plant is pictured in 2021. The city has been using a water treatment bypass system while repairs were completed on the plant.

Dustin Patar/The Canadian Press

The City of Iqaluit says its water treatment plant is to return to service Tuesday morning, more than a year after it was shut down due to contamination.

The plant was initially shut down in October, 2021, after fuel was detected in the city’s water supply.

A do-not-consume order was lifted in December of that year, but less than a week later it was discovered the water was contaminated by a tar-like substance.

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The city has since been using a water treatment bypass system while repairs were completed on the plant.

The city says when the plant becomes operational at 8 a.m., residents will be under a precautionary boil water order that could last as long as a week.

It says as the filtration system takes over, residents will notice gradual improvement in the taste and clarity of the water coming from their taps.