Safe swimming areas

From November to May, our team collect water samples from popular swimming spots to check health risks.

These samples are checked for faecal contamination (E. coli or Enterococci bacteria) and/or for toxin-forming algae (cyanobacteria). The monitoring information is shared with Bay of Plenty and Lakes Public Health Service who analyse the results and issue a public health warning if unsafe levels of bacteria or toxic algae are found.

Choosing a healthy and safe spot to swim

You can check the latest swimming water quality information, including health warnings at LAWA.

Swallowing water with toxic algae can cause vomiting, diarrhoea, cramps, nausea and other symptoms. Skin contact may lead to irritation of the skin, eyes, nose and mouth. Dogs are particularly at risk because they often scavenge and play near water. If in doubt, stay out.

Regardless of health warning status:

• You should avoid swimming for two to three days after heavy or prolonged rain. This is because the water can be contaminated by farm and urban run-off which takes some time to settle out or flush away.
• Avoid swimming near potential sources of contamination such as flocks of birds, storm water or waste water outlets.
• If you suspect an algal bloom is present, don't swim or take part in an activity that may result in accidental consumption or exposure to water affected by algal blooms. 
• Not all cyanobacteria produce harmful toxins, so a green lake or algal bloom doesn’t always mean it is of toxic nature, but if you see signs of a bloom and no warning has been issued, play it safe and avoid contact, especially if you have allergies or are immune compromised.