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Lifted12 March 2026CanterburyCanterburyHealth Warning – Harmful Algal Bloom in Te Roto o Wairewa Lake Forsyth
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Active25 February 2026Wellington, Hutt and KapitiWellington, Hutt and KapitiChanges to public health advice regarding Moa Point
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Lifted10 March 2026South CanterburySouth CanterburyHealth Warning - Unsafe Recreational Water Quality at Waihao River at Gum Tree Flat Road (Don’s Hole)
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Active9 March 2026Wellington, Hutt and KapitiWellington, Hutt and KapitiMeasles in Wellington
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Active8 March 2026AucklandAucklandMeasles in Auckland
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Active6 March 2026CanterburyCanterburyUnsafe recreational water quality at Ashley River | Rakahuri at SH1
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Lifted2 March 2026CanterburyCanterburyHealth warning lifted for Algal Bloom in Lake Ellesmere | Te Waihora
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Lifted26 February 2026NationalNationalMeasles in Tauranga
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Lifted26 February 2026WaikatoWaikatoCyanobacteria health warning placed on Lake Ngā Roto
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Lifted25 February 2026Wellington, Hutt and KapitiWellington, Hutt and KapitiHealth New Zealand advises people to stay off the south coast beaches and avoid all contact with the water
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Lifted25 February 2026, 10.42amCanterburyCanterburyHealth Warning – Unsafe recreational water quality at Akaroa Main Beach
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Active23 February 2026South CanterburySouth CanterburyHealth Warning – Harmful Algal Bloom in Waihi River at Waihi Gorge
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Active19 February 2026WaikatoWaikatoHealth alert placed on all Waikato streams, rivers, estuaries, coastal beaches and lakes affected by recent severe weather events
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Lifted16 February 2026CanterburyCanterburyHealth warning — Unsafe recreational water quality at Peketā Beach
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Lifted30 January 2026WaikatoWaikatoCyanobacteria health warning placed on Lake Maraetai
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Active22 December 2025South CanterburySouth CanterburyHealth Warning Lifted for Harmful Algal Bloom in Pareora River | Pureora River at SH1 bridge
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Lifted12 February 2026CanterburyCanterburyHealth Warning Lifted at Diamond Harbour | Te Waipapa, Purau Bay, Church Bay | Kaioruru and Charteris Bay | Te Whara
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Lifted12 February 2026CanterburyCanterburyHealth Warning Lifted at Diamond Harbour | Te Waipapa, Purau Bay, Church Bay | Kaioruru and Charteris Bay | Te Whara
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Lifted2 February 2026NorthlandNorthlandMeasles in Northland
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Lifted2 February 2026Otago and SouthlandOtago and SouthlandMeasles in Dunedin & Queenstown
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Lifted2 February 2026AucklandAucklandMeasles in Auckland
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Lifted2 February 2026Manawatū-WhanganuiManawatū-WhanganuiMeasles in Manawatū
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Lifted2 February 2026Wellington, Hutt and KapitiWellington, Hutt and KapitiMeasles in Wellington
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Lifted26 January 2026South CanterburySouth CanterburyHealth Warning lifted for Harmful Algal Bloom in the Hae Hae Te Moana River at Te Moana Gorge
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Active10 February 2026CanterburyCanterburyHealth warning – Harmful algal bloom in South Bank Tributary of the Waiau Uwha River above Waiau Bridge
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Lifted10 February 2026South CanterburySouth CanterburyHealth Warning lifted for Harmful Algal Bloom in Ōpihi River at State Highway 1 bridge
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Active19 January 2026WaikatoWaikatoCyanobacteria health warning remains in place for Lake Rotokaeo (Forest Lake)
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Lifted31 October 2025WaikatoWaikatoCyanobacteria health warning for Lake Rotokaeo (Forest Lake)
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Lifted4 February 2026NationalNationalCyanobacteria health warning remains in place on Lakes Rotokaeo and Arapuni
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Lifted4 February 2026NationalNationalCyanobacteria Health Warning Placed on Lake Ngāroto
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Lifted3 February 2026South CanterburySouth CanterburyHarmful algal bloom in Waihi River Upstream of Wilson Street Bridge
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Active30 January 2026, 1.00pmNationalNationalTravellers urged to be on alert for dengue with increased cases in the Pacific
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Lifted23 January 2026Bay of Plenty, Rotorua and TaupōMultiple LocationsHealth warning for Ohau Channel
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Lifted23 January 2026Rotorua and TaupōRotorua and TaupōHealth Warning for Lake Okaro
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Active21 January 2026NorthlandNorthlandHeavy rain warning for Northland
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Lifted19 January 2026WaikatoWaikatoHealth warnings for Lakes Puketirini and Rotokaeo
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Lifted19 January 2026WaikatoWaikatoCyanobacteria health warning placed on Lakes Kainui and Arapuni
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Lifted19 January 2026WaikatoWaikatoCyanobacteria health warning placed on Lake Rotokauri
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Active9 December 2025CanterburyCanterburyAlgal bloom health warning for Hurunui River at SH1 Bridge
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Lifted15 January 2026CanterburyCanterburyUnsafe recreational water quality at Corsair Bay | Motu-kauati-iti, Cass Bay Motu-kauati-rahi at jetty, Cass Bay | Motu-kauati-rahi at beach, and Rāpaki Bay at beach
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Active14 January 2026WaikatoWaikatoCyanobacteria health warning placed on Lake Waahi
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Active14 January 2026CanterburyCanterburyHarmful algal bloom in Lake Hood
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Lifted2 January 2026Rotorua and TaupōRotorua and TaupōHealth Warning for Lake Rotorua
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Active10 December 2025, 4.30pmCanterburyCanterburyHarmful Algal Bloom in Lake Pegasus
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Active10 December 2025CanterburyCanterburyHarmful Algal Bloom in Waikirikiri-Selwyn River at Glentunnel and at Whitecliffs Road.
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Active10 December 2025Hawke's BayHawke's BayAlgal bloom in Tukituki River at Walker Road
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Active21 November 2025South CanterburySouth CanterburyHarmful Algal Bloom in Waihao River at Gum Tree Flat Rd (Don's Hole)
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Lifted30 October 2025, 12.35pmWaikatoWaikatoCyanobacteria Health Warning Lifted for Lake Rotokaeo
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Lifted30 July 2025WaikatoWaikatoCyanobacteria health warning for Lake Rotokaeo
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Active28 March 2025Rotorua and TaupōRotorua and TaupōHealth warning for Ōtautū Bay in Lake Rotoehu
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Active1 January 2021Bay of Plenty, Rotorua and TaupōMultiple LocationsDo not eat eels from Kopeopeo canal and Orini stream in Whakatāne
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Active1 January 2021Bay of Plenty, Rotorua and TaupōMultiple LocationsPermanent bacterial contamination health warnings
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Lifted30 May 2025NorthlandNorthlandTaipā residents warned against swimming and collecting shellfish
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Lifted30 May 2025NorthlandNorthlandKaipara Harbour and Kaiwaka and Otamatea rivers
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Lifted30 May 2025NorthlandNorthlandHealth alert for Whangārei Harbour
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Active12 March 2025Wellington, Hutt and KapitiWellington, Hutt and KapitiCryptosporidiosis increase in Wellington region
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Active22 November 2024NationalNationalPertussis (whooping cough) epidemic across Aotearoa New Zealand