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Waste and warm weather make pond pong

NZ Newswire logoNZ Newswire 3/03/2017

Organic matter has "flipped over" in Te Anau's sewage pond and is smelling.

High loadings to the wastewater treatment ponds as a result of tourist numbers, combined with a long spell of warm weather and low rainfall, mean the ponds have encountered this issue, says Southland District Council manager Ian Evans.

"In technical terms, the first part of the pond has flipped over," he says, causing organic material to rise to the surface and releasing gas, which contributes to the odour.

Council staff are working to provide "extra aeration" and are dosing lime and other chemicals to restore the balance of the system and removal of the sludge from the surface of the pond.

It is a biological system and may take time to fully correct, Mr Evans says.

Council staff and contractors are continuing to monitor the situation and are hopeful rain forecast this weekend will help.

Te Anau is the main gateway to Fiordland National Park. The resort town is located between Queenstown and Milford Sound.

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