Warnings and Alerts

Active warnings and alerts for River Quality

Health Warning – Unsafe Water Quality

30 MAR 2026 By ENVIRONMENT CANTERBURY (KD)

Health New Zealand | Te Whatu Ora Media Release     30 March 2026    Health Warning – Unsafe Recreational Water Quality at Otaio River at Otaio Gorge and Waihao River at Gum Tree Road (Don’s Hole). Health New Zealand | Te Whatu Ora has...
Toxic algae warnings for cyanobacteria in rivers

20 MAR 2026 By ENVIRONMENT CANTERBURY (KD)

HEALTH WARNING UPDATE ISSUED BY THE NATIONAL PUBLIC HEALTH SERVICE The National Public Health Service have issued a health warnings for toxic algae. The warnings follow detection of moderate to high cover of toxic algae (benthic cyanobacteria) in the:  South Bank Tributary of the Waiau Uwha...