Project Little Oneroa

To restore the Little Oneroa Stream so that it is safe for human contact and recreation and meets our environmental, social & cultural values.

Little Oneroa Stream - Whats happening here?


Like too many waterways in Aotearoa the Little Oneroa Stream is polluted with E.coli bacteria. The Waiheke Community have been working to learn more about why the stream is polluted and what we can do to change that. Here is what we have found.

The Lagoon is currently unsafe for human recreational contact.

The main sources of contamination are

  • Poorly performing on-site waste water systems
  • Bird and dog faeces

Pollution levels fluctuate due to weather, tides & sand blocking the lagoons flow to the ocean.

These are natural occurrences.


There are 4 things we can all be doing to help

  • Don’t feed the ducks

Ducks breed to the amount of food available. Lots of food leads to lots of ducklings, and excessive breeding leads to large numbers of birds in one area. Because ducks defecate directly into the water, they can have a significant effect on water quality & the E.coli levels.

  • Use septic friendly products

Not all products on supermarket shelves are safe for your septic system or the environment. Anti bacterial cleaners, bleach, disinfectants & many other chemicals can kill the micro-organisms in your septic system, causing it to fail and potentially leach runoff into our waterways.

  • Care for your on-site waste water system

Regular maintenance (hi-tech systems needs a maintenance contract and frequent servicing) & 3 yearly pump outs will ensure your system is working effectively.  Conserving water by only doing 1 load of washing per day and spacing our showers are proactive steps you can take to avoid overloading your septic system.

  • Pick up after your dog

Dog faeces left on the ground wash into waterways, carrying E.coli and other  bacteria that can make people sick.

We can all make changes that will contribute to healthy waterways.

As a community we can reduce the pollution in the Little Oneroa Stream.

Auckland Council Voluntary Targeted Rate

Retro fit your septic scheme and consent subsidy

All catchment residents may be eligible to apply for the on-site wastewater upgrade scheme that could provide the means for homeowners to borrow between $2,000 and $35,000 for the upgrade or replacement of their on-site wastewater treatment system if it meets specified criteria. They may also receive building and resource consent subsidies.

The cost of the upgrade would be covered via a loan from Auckland Council that is paid back through the property owners rates over a 15 year period.

A building & resource consent subsidy may also be available to property owners that are upgrading but do not want to take advantage of the retrofit scheme.
Project Little Oneroa are available to support catchment residents through the process and are planning on holding a public meeting where property owners can meet with the registered wastewater designers, Auckland Council staff and other experts to discuss in September at the Waiheke Sustainability Centre.

For more information or to regsiter for the public meeting contact or call 372 2915.


Auckland Council accredited suppliers

Oasis Clearwater



Waiheke Independent Waste Water Engineer

CBC Wastewater

Little Oneroa Action Plan

The Waiheke Resources Trust, with support from community members, Mana Whenua, Auckland Council, Auckland Transport, field experts and the Waiheke Local Board, developed the Little Oneroa Action Plan through a series of seven facilitated workshops held from 8 to 29 October 2015. Altogether a total of 107 people participated in the workshops.

The workshops were based on the Logical Framework Approach methodology defined as: a quality-based understanding of planning, based on a participatory and transparent planning process, aimed towards the needs of partners and target groups, in which the key elements of a project are agreed on step by step, in teams, with those concerned, and recorded transparently.

From that a purpose of the project was created

To restore the Little Oneroa Stream so that it is safe for human contact and recreation and meets our environmental, social & cultural values.

Project Little Oneroa's yearly work program is constructed using the objectives and activities as set out in the action plan.

For a copy of the Little Oneroa Action Plan email 



Project Little Oneroa is proudly funded by the Waiheke Local Board


Project Little Oneroa is also supported by the Auckland Council Healthy Water team.

Project Little Oneroa supports these United Nations Sustainable Development Goals