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FRIENDS of Banks Peninsula current projects

Akaroa Wastewater Beneficial Re-Use
Akaroa Wastewater Beneficial Re-Use

The disposal of Akaroa’s Wastewater has been a difficult and contentious issue for many years. FRIENDS of Banks Peninsula seeks to work constructively with the Council and Ngāi Tahu to find a solution that is acceptable to all parties, sustainable and robust.


Water is a precious resource. Water restrictions are in force every summer in Akaroa and water shortage issues are predicted to get worse. Why throw away a valuable resource?

See the FAQs below.


The Akaroa sewage treatment plant currently situated at historically significant Takapuneke south of Akaroa is to be moved to a new location at the top of Old Coach Road. However, the Council has had its application to discharge the treated water from the new plant to the harbour declined with a directive to investigate land based alternatives more thoroughly. The Council must report back to the court with significant progress by June 30, 2017.


In April 2016 it released a plan proposing several options including a land based disposal in the Takamatua headland and valley. The headland area was subsequently withdrawn on geotechnical grounds and Council attention moved to the valleys of Takamatua and Robinsons Bay with water to be irrigated and absorbed either using a cut-and-carry pasture system or trees. It has also found sufficient flat land at a remote site at the Pompey’s pillar headland above Otanerito, but this requires a longer pipe and more pumping.

Residents approached the Friends of Banks Peninsula as a community environment society to support their concerns.

Q: Why not just put it back out to sea?

A: Akaroa has water shortages in summer, which puts pressure on the local streams from the volume of water taken. Putting the treated water back into the harbour wastes a valuable resource and does not help solve this issue, and it's offensive to Ngāi Tahu.

Q: Why are you in favour of watering gardens in Akaroa, but not properties in Takamatua and Robinsons Bays?

A: Re-use in Akaroa would be voluntary, meaning residents would make use of the water only when they need it. If the wastewater is used for irrigation in Takamatua or Robinsons Bay it would be disposed of – these areas do not need the water – and it would be at whatever (higher) rate the Council believes the land can take, rather than what it needs. The water is essentially being wasted, and places the local streams at risk.

Q: What is the difference between drinking water and water treated to salad crop standard?

A: Water treated to salad crop standard may be safely ingested, but would not necessarily be desirable to drink because of residual taste. It is expected that salad crops would be washed before being eaten.

Q: Is a purple pipe network practical?

A: We believe it is a viable option if installed over time when streets are being dug up for other reasons, to minimise costs. There may be other ways the reclaimed water could be used in Akaroa too, such as groundwater recharging (by watering the upper slopes of the catchment), establishing biodiversity reserves, horticultural enterprises – or other ideas we haven’t thought of yet. Please put your thinking caps on and see where else there might be a beneficial need for water to suggest to Council.

Project 1a
Public Toilets
Project 3

Friends of Banks Peninsula have been following with interest the situation surrounding the public toilets on Banks Peninsula. Many have had issues and are in need of upgrading, and some areas have no public toilets at all. Read the 

report compiled by BECA on behalf of the Christchurch City Council, to give an overview of all of the Council maintained toilet blocks in our area and the suggested repairs or improvements that need to be made.

Wasp Control
Wasp Control

Grehan Valley residents have clubbed together to use a new baiting method to eradicate wasps in their valley.  They needed an incorporated society to support their campaign and assist with handling the funds. FRIENDS of Banks Peninsula was delighted to help this group by providing an umbrella service to assist the campaign.

2017-2018 Season - there was noticeably less wasp activity in the valley compared with the previous season. There was not enough activity to warrant the pre baiting (which is the testing for the wasps going for the protein). However we put some wasp bait stations out in January & February in places where we noticed wasps in previous years, including Waeckerle’s Green and the Curry Track.


2018-2019 Season – Early in the season Queen Wasps have been noticed flying and they will be looking for nesting places. Initially they will chew on wood to make their nests and then they will start laying their eggs to make their colony. Wasps will swing from feeding on protein to sugar throughout the season, depending on the weather. Vespex can only be used towards the end of the season when wasp numbers are high, so that the poison can be carried back to the nest. Vespex is not a preventative control designed to stop colonies from getting established it is a method of control once numbers have built up and can be seen by us.

There was not a substantial problem with wasps over this summer period. Nine nests were controlled in the Grehan Valley.


2019-2020 Season- Between January & April 2020 24 wasps nests were killed in the Grehan Valley, mostly with petrol bottles or wasp powder, ‘No Wasps’. We found this powder very effective. There was an increase in wasp activity this season.

2020-21 Season - There were a total of 11 nests killed this season – 1 in January, 2 in February and 8 in March. Summary of the season is that there were considerably less wasps around compared to previous years. This is most likely related to the weather in patterns in spring time. It may also show that the programme in the Valley is working. Usually wasps fly no further than 200 metres, and we are killing all the nests within this range.

2021-22 Season - Twelve wasp nests were destroyed in the Grehan Valley and 1 in Robinsons Bay. There was one nest in a hedge that took quite a bit to kill in someone’s garden in the valley. Total: 13 nests. It was quite a modest season wasp-wise and we hope for another one of those this summer.

2022-23 Season -  A total of 24 nests were destroyed, mostly with ‘No Wasps’ powder, between 28 January and 4 May 2023. This is similar to previous years. These was nests weren't just in the Grehan Valley, but also further afield. Vespex was also put out around apiary sites in January. It has been a reasonably warm winter so we shall see if more queens over wintered and numbers increase this summer. 

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