Warnings and Alerts

Active warnings and alerts for Waikato region

• 
  Algal Bloom (Red)

  3 FEB 2025 By WRC LAWA ADMIN

  Recreational contact with water is not suitable as there is a risk of health effects from exposure to cyanobacteria and algal blooms. For example, respiratory, irritation and allergy symptoms. Read more information on algal blooms at Waikato Regional Council's website.
• E. coli (Amber)

  3 FEB 2025 By WAIKATO REGIONAL COUNCIL

  While Enterococci results are below alert levels, further monitoring of E. coli at this site currently advises caution for swimming.
• 
  Algal Bloom (Amber)

  3 FEB 2025 By WRC LAWA ADMIN

  Recreational contact with water is not advised as there is a risk of health effects from exposure to cyanobacteria and algal blooms. For example, respiratory, irritation and allergy symptoms. Read more information on algal blooms at Waikato Regional Council's website.
• Contaminated site - Ohinemuri

  31 JAN 2025 By WRC LAWA ADMIN

  A buildup of bright orange sediment has discharged from a mine shaft entrance, down a steep drop and into a stream that feeds into the Ohinemuri River near the Karangahake Gorge car park. We know there is more sediment to come down into the river and will be for some time. We advise against any cont...
• Toxic Algae (Amber)

  24 JAN 2025 By WRC LAWA ADMIN

  Toxic algae can be a concern at some Waikato River lake sites.  It is important that you use your own judgement before getting into the water. If the water is bright green like pea soup, stay out. Extra care should be taken with toddlers and dogs as they like to put things into their mouths and even...