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Story: Sewage, water and waste

Sanitary landfill

  • Empty landfill

  • Partially filled

  • Full landfill

Click the arrows to see a cross-section of an empty, partially full and full sanitary landfill. The base of a new landfill is above groundwater level and lined with a protective layer. A drain diverts leachate to a storage facility, with landfill gas vented or flared. Underground wells and above ground systems monitor the condition of groundwater and landfill gas levels. Once full, the top layer of a landfill is covered in grass.

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Te Ara - The Encyclopedia of New Zealand

Source: H. G. Leach & Company

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How to cite this page

Christine Dann, Sewage, water and waste – Cleaning up dumps, Te Ara – the Encyclopedia of New Zealand, https://teara.govt.nz/en/interactive/24458/sanitary-landfill (accessed 4 June 2026).

Story by Christine Dann, published 12 April 2010.