Approved Wastewater Engineers

It is important to have your onsite waste water plan well designed and to meet local Building Code and Council design requirements. Waterless composting toilets works with the following waste water engineers that are knowledgeable and support the use of Composting Systems.


Region - AUCKLAND and the greater area (Whangarei through Coromandel/Hamilton).

GWE Consulting has a history of offering innovative, appropriate and environmentally sustainable solutions for onsite wastewater systems from single lot through to community and subdivision developments. Their team of wastewater design engineers are able to provide practical, economic solutions from a range of treatment and disposal technologies whilst meeting the community’s environmental, social and cultural needs.

Design and consent Services Provided.

  • Pre-purchase Inspections and Due Diligence
  • Wastewater & Greywater Treatment designs
  • On-site Disposal designs (TP58’s)
  • Resource Consenting and Building Consent applications
  • On-site Stormwater Design reports
  • Flood Assessments
  • Driveway Design
  • Traffic Impact Assessments
  • Geotechnical Site Investigation and Reporting

Many on-site wastewater systems will require a regional resource consent for the discharge of wastewater onto land. GWE proved our clients with advice on the resource consent requirements and produce technical and planning reports – including assessment of environmental effects (AEE) to support resource consent applications for new and renewal of on-site wastewater systems.


Patrick O’Riordan

Wastewater Team Leader

021 143 1675


T: 09 445 8338