Except as permitted under the Act (for example for the services of the Crown or in reliance on one of the fair dealing exceptions i.e. a fair dealing for the purposes of research or study) no part of this website may be reproduced, stored in a retrieval system, communicated or transmitted in any form or by any means without prior written permission.

All inquiries should be made to the copyright owner at:

Alternative Technology Association, Level 1/39 Little Collins St Melbourne VIC 3000 Australia
Phone: +61 (0)3 9639 1500


The ATA takes great care in selecting and verifying all material that appears on this website, but do not necessarily share the opinions expressed by individuals on the site, nor does the ATA accept responsibility for the accuracy of statements made by contributors.

ATA does not warrant, guarantee or make any representations as to the content or suitability of the information on this site (or any site linked to this site) for any purpose.

ATA will not be liable for any claims or damages whatsoever resulting from use or reliance on information in this site.

This calculator provides a best estimate of tank level over time based on the responses provided by the user. ATA takes no responsibility for variations between the estimated tank level provided in the calculator and actual yield in any given year.

Privacy policy

At no time is personal information disclosed to a third party without the express permission from the relevant client/individual.

The Alternative Technology Association collects and holds personal information for the purposes of:

  • Providing a requested product or service
  • Managing and administering the product or service ATA employees, volunteers and contractors may have access to personal information of our staff, members, subscribers, customers and contacts.

This information is treated with the strictest confidentiality at all times and is not used for any other purpose than specified in accordance with our responsibilities under the National Privacy Principles (NPP 4.1).

The ATA is not bound by, but aims to comply and operate within the National Privacy Principles (NPP). See the Guidelines to the National Privacy Principles.