Waste

• Waste Minimisation Act 2008
• Progress and outcomes
• Waste Strategy
• Waste Streams
• Waste data

Preliminary results of the pilot process

One of the key aspects of the any waste data collection and reporting process, is finding ways to get maximum value from the available data including that collected by other agencies or methods.

Download Waste Pilot results (Excel 263 KB) to see the results of the Waste Data Pilot to date.

In the case of the Waste Data Pilot project the following data sources have been used:

• SWAP Survey results (1995 – 2002)
• 1995 and 1998/99 Landfill Census Results
• The 2002 Landfill Review and Audit
• Data from the Packaging Council of New Zealand on recycling of packaging waste
• SWAP Baseline Programme results

Organic Waste

• Combine quantity of waste to landfill and WAP/SWAP data to give quantity of organic waste disposed of to landfill.
• Use data from organic waste contractors and local authorities to give regional organic waste diversion figures.

Using this data, for the Waikato:

• Present (or existing) Green waste diversion = 36.8 % (of total green waste)
• Diversion of organic (green waste and kitchen scraps) waste = 22.5 % (of organic waste)

Calculations and assumptions

Organic waste diversion in the Waikato:

1. Waste disposed of to landfill = 323,894 tonnes
2. Total measured waste (landfill + recycle + organic) = 388,092 tonnes
3. Organic waste disposed of to landfill = 27.9 % or 90,366 tonnes
4. Organic waste diverted from landfill = 26,291 tonnes
5. Total organic waste (landfill and diversion) = 26,291 + 90,366 = 116,657 tonnes
6. Organic diversion = 26,291 / 116,657 = 22.5 % of total organic waste
7. If green waste is 50 % of the landfilled organic waste stream and all of the waste stream diverted to composting then:
8. Green waste diversion = 26,291 / ((50 % x 90,366) + 26,291) = 36.8 %

Last updated: 17 September 2007