Current and upcoming control work

Find out about current and upcoming weed and pest control work.

Effective pest management depends on collaboration. We consult with a range of interested groups when planning control programmes, including neighbouring landowners, district and regional councils, iwi, advocacy groups, and the local community.

Before undertaking any control work, we notify the public by:

  • putting up signs near the affected area
  • publishing notices in local newspapers
  • posting information on this website.

Most of our control work is weather dependent, so advertised dates may change at short notice. We try to avoid carrying out any spraying on weekends or during public holidays.

We publish tables below with detailed information about recent aquatic weed control work. You can find more information about all our biosecurity programmes on the page Biosecurity control work.

Operational spray plans

Te Waikai Otaota Te Arawa Lakes Spray Plan May to June 2026
PDF
1.33 MB
Kawarau River operational spray plan - April 2025
PDF
10.46 MB
Lake Dunstan operational spray plan - April 2025
PDF
14.16 MB
Lake Wanaka operational spray plan - March 2025
PDF
719.9 KB
Lake Benmore operational spray plan - February 2026
PDF
1.53 MB
Lake Karapiro operational spray plan - February 2026
PDF
5.45 MB

Lakeweed spraying public notification protocols

Proposed Lake Dunstan Control Sites and Signage Locations
PDF
18.3 MB
Lake Dunstan Notification Protocol
PDF
304.29 KB
Lake Karāpiro Notification Protocol
PDF
5.38 MB
Lake Wanaka Spraying Notification Protocol 2024
PDF
540.98 KB
Lake Benmore Spraying Notification Protocol 2024
PDF
1.58 MB
Kawarau River Spraying Notification Protocol 2024
PDF
1.12 MB
Spray notification protocol for Te Arawa Lakes aquatic weed management
PDF
659.73 KB

Lake Benmore

No upcoming control works currently scheduled.

Lake Dunstan

Name of lakeControl siteSafe to swim at, gather food from, or take water for irrigation or domestic purposes?Scheduled date of controlActual date of treatment
Lake DunstanAnnan Inlet Yes – as at 8 May 2026Week of 18 May 2026TBC
Lake DunstanBannockburn Inlet Yes – as at 8 May 2026Week of 18 May 2026TBC
Lake DunstanBendigo Boat Ramp and Approaches Yes – as at 8 May 2026Week of 18 May 2026TBC
Lake DunstanChampagne Gully Ramp and Ski Lane Yes – as at 8 May 2026Week of 18 May 2026TBC
Lake DunstanCromwell Swimming Beach Yes – as at 8 May 2026Week of 18 May 2026TBC
Lake DunstanDairy Creek Yes – as at 8 May 2026Week of 18 May 2026TBC
Lake DunstanJacksons Yes – as at 8 May 2026Week of 18 May 2026TBC
Lake DunstanLowburn Boat HarbourYes – as at 8 May 2026Week of 18 May 2026TBC
Lake DunstanLowburn Inlet Yes – as at 8 May 2026Week of 18 May 2026TBC
Lake DunstanMcNulty’s Inlet Yes – as at 8 May 2026Week of 18 May 2026TBC
Lake DunstanNorthburn Ski Lane Yes – as at 8 May 2026Week of 18 May 2026TBC
Lake DunstanOld Cromwell Town and Boat Ramps Yes – as at 8 May 2026Week of 18 May 2026TBC
Lake DunstanPisa Moorings Yes – as at 8 May 2026Week of 18 May 2026TBC
Lake DunstanWeatherall Creek and Burton Creek Yes – as at 8 May 2026Week of 18 May 2026TBC

Lake Ōkataina

Control siteSafe to swim at, gather food from, or take water for irrigation or domestic purposes?Scheduled date of controlActual date of treatment
Tauranganui Bay Boat RampYes – as at 4 May 202618 May – 30 JuneTBC

Lake Karapiro

No upcoming control works currently scheduled.

Lake Ōkāreka

Control siteSafe to swim at, gather food from, or take water for irrigation or domestic purposes?Scheduled date of controlActual date of treatment
Lake MarginYes – as at 4 May 202618 May – 30 JuneTBC

Lake Ōkataina

Control siteSafe to swim at, gather food from, or take water for irrigation or domestic purposes?Scheduled date of controlActual date of treatment
Tauranganui Bay Boat RampYes – as at 4 May 202618 May – 30 JuneTBC

Lake Rerewhakaaitu

No upcoming control works currently scheduled.

Lake Rotoehu

No upcoming control works currently scheduled.

Lake Rotoiti

Control site

 

Safe to swim at, gather food from, or take water for irrigation or domestic purposes?

 

Scheduled date of control

 

Actual date of treatment

 

Punawhakareia Bay (Gisborne Point)Yes – as at 4 May 202618 May – 30 JuneTBC
Te Ruatō BayYes – as at 4 May 202618 May – 30 JuneTBC
Ōkahutoroa Bay (Cherry Bay)Yes – as at 4 May 202618 May – 30 JuneTBC
Ōkawa BayYes – as at 4 May 202618 May – 30 JuneTBC
Te Weta BayYes – as at 4 May 202618 May – 30 JuneTBC
Ōtaramarae Boat RampYes – as at 4 May 202618 May – 30 JuneTBC
Te Waiiti StreamYes – as at 4 May 202618 May – 30 JuneTBC
Te Akau PeninsulaYes – as at 4 May 202618 May – 30 JuneTBC
HinehopuYes – as at 4 May 202618 May – 30 JuneTBC

Lake Rotomā

Control siteSafe to swim at, gather food from, or take water for irrigation or domestic purposes?Scheduled date of controlActual date of treatment
Merge Lodge Boat RampYes – as at 4 May 202618 May – 30 JuneTBC
Matahi Boat RampYes – as at 4 May 202618 May – 30 JuneTBC

Lake Tarawera

Control siteSafe to swim at, gather food from, or take water for irrigation or domestic purposes?Scheduled date of controlActual date of treatment
Ōtumutu LagoonYes – as at 4 May 202618 May – 30 JuneTBC
Te Rātā Bay (Hot Water Beach)Yes – as at 4 May 202618 May – 30 JuneTBC
Wairua PoolYes – as at 4 May 202618 May – 30 JuneTBC
Rāpatu BayYes – as at 4 May 202618 May – 30 JuneTBC

Lake Wānaka

Name of lakeControl siteSafe to swim at, gather food from, or take water for irrigation or domestic purposes?Scheduled date of controlActual date of treatment
Lake WānakaEely PointYes – as at 8 May 2026Week of 18 May 2026TBC
Lake WānakaRoys BayYes – as at 8 May 2026Week of 18 May 2026TBC
Lake WānakaRoys Bay Boat Ramp and JettyYes – as at 8 May 2026Week of 18 May 2026TBC
Lake WānakaStevensons IslandYes – as at 8 May 2026Week of 18 May 2026TBC
Lake WānakaWānaka MarinaYes – as at 8 May 2026Week of 18 May 2026TBC

Kawarau River

No upcoming control works currently scheduled.

Last updated