Health New Zealand has lifted the health warning for Roto Kohatu Reserve at Lake Rua following recent improvements in water quality.

Latest water testing has confirmed that faecal bacteria levels at the reserve are now below guideline values, making the water safe for recreational use.

The health warning, issued on 26 December 2024, has been removed.

Dr Cheryl Brunton, Medical Officer of Health for the National Public Health Service, said the news would be welcomed by swimmers and other recreational users.

“This is great news for swimmers and other recreational water users in Roto Kohatu Reserve at Lake Rua who would have been avoiding the water following the recent high levels of contamination,” Dr Brunton said.

Health warnings are issued when water quality is deemed unsafe for recreational use due to the risk of exposure to bacteria and other pathogens. Contaminated water can contain harmful microorganisms, including viruses, bacteria, and protozoa, posing potential health risks.

“In most cases, the ill-health effects from exposure to contaminated water are minor and short-lived. However, there is the potential for more serious diseases, such as hepatitis A, giardia, cryptosporidiosis, campylobacter, and salmonella,” Dr Brunton said.