Story: Sewage, water and waste

Rosedale waste-water plant (1st of 2)

 Rosedale waste-water plant

This aerial view of the Rosedale waste-water treatment plant in Auckland is dominated by the oxidation ponds, also known as waste stabilisation ponds. Exposure to sunlight and oxygen lets aerobic bacteria break down organic matter. This stage of sewage treatment is often referred to as secondary treatment. Rosedale on the North Shore is the second-largest treatment works in the Auckland region. It treats the effluent of around 185,000 people.

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Auckland Council
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How to cite this page:

Christine Dann, 'Sewage, water and waste - Water pollution', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/en/photograph/24464/rosedale-waste-water-plant (accessed 3 June 2020)

Story by Christine Dann, published 11 Mar 2010