What happens to wastewater after it leaves your home, goes through Whanganui's wastewater treatment plant and finally out to the Tasman Sea?

Laurel Stowell visited the year old $40 million plan to find out.

It's something most people don't give a second thought to, but Whanganui's senior wastewater engineer Tony Hooper would like more people to know about it.

Whanganui's wastewater treatment plant, costing $40 million and in full

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