Small Community Wastewater

Our team of wastewater engineers is able to provide practical, cost-effective treatment and disposal solutions for small communities, utilising a range of suitable treatment and disposal technologies.

GWE has a long history of delivering decentralised wastewater schemes throughout New Zealand, that meet the environmental, social and cultural needs of communities they serve, be they large subdivisions, camp grounds or maraes.

We are specialists in the consenting and design of on-site wastewater systems using curent NZ standards and codes of practice. For larger discharges we design scaled up, advanced secondary and tertiary level treatment systems that can safely discharge treated effluents to the environment.

Small Community Wastewater – What We Do

Our wastewater team has expertise in the complete project lifecycle from initial investigations and feasibility studies through to outline and detailed design, project implementation and commissioning of treatment plants, pipelines and pump stations. We provide our clients with the following services:

  • Pre-purchase inspections and due diligence
  • Resource consenting
  • Wastewater treatment
  • On-site wastewater treatment
  • On-site wastewater disposal

Pre-purchase Inspections and Due Diligence

The purchase of rural and lifestyle property presents a number of risks that are not present with urban lots, including reliance on on-site treatment and disposal systems for the management of domestic wastewater. GWE offer a comprehensive assessment of existing on-site wastewater systems to provide peace of mind for prospective property purchasers. GWE can undertake condition assessment of existing treatment systems and provide advice for future development and change of land use.

Resource Consenting

Many on-site wastewater systems will require a regional resource consent for the discharge of wastewater onto land. GWE prove 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.

Wastewater Treatment

GWE works in partnership with New Zealand’s leading wastewater system suppliers to offer affordable solutions that will meet resource consent requirements. We provide designs specific to our client’s needs and site conditions including:

  • Primary treatment – grease traps, septic tanks and effluent filters
  • Secondary treatment – aerated treatment systems, activated sludge, bio-filtration, trickling filters and packed bed reactors
  • Tertiary treatment – UV, chlorine, ozone disinfection
  • Alternative systems – greywater reuse, composting systems

Onsite Wastewater Treatment

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

On-site Wastewater Disposal

A range of options are available for the on-site disposal of treated wastewater. GWE have experience with the design of:

  • Pumping and siphon-controlled distribution systems of treated wastewater
  • Shallow irrigation systems including drippers, subsoil, and spray irrigation
  • Conventional irrigation trenches, mounds and beds