Why use us

Having designed and certified septic tanks ourselves, we have a good understanding of not only your site, but also the best treatment system for your situation.Having designed and certified septic tanks ourselves, we have a good understanding of not only your site, but also the best treatment system for your situation.

  • Your needs come first - we listen and are keen to understand
  • We have a reputation for delivering high quality work and being able to see the bigger picture
  • Not just one opinion: our extensive networks of established relationships with other professions and professionals enable us to lead or be part of multidisciplinary teams
  • Independent science-based advice
  • We are experts because we specialise in our field of work
  • Value for money from sustainable, pragmatic solutions
  • Integrity and ethics are our core values

What people say about us

"Andy Duncan has worked as Consultant, Adviser and Project Manager for a number of Sustainable Wairarapa Inc (SWI) projects over the last decade. As part of this work, Andy acted as Project Manager for a $150,000 recycled water farm irrigation feasibility study undertaken by SWI.Andy’s knowledge, skills and ability have been evident in the results of his work which has not only pleased SWI, but impressed many in local and central government who have provided funding for SWI’s projects. SWI have greatly appreciated the positive results we have achieved based on Andy’s knowledge, advice and work, and look forward to continuing to work with him in the future."

- Ray Stewart, Sustainable Wairarapa Inc Treasurer and Project Supervisor.