When it rains it’ll change
Planning a trip to the beach or river for a swim this summer? If it’s been raining recently, it’s probably not safe to swim.
Over Christmas, Marlborough saw some large thunderstorms roll through the region with the Metservice issuing warnings for two particularly nasty ones.
Council’s Water Quality Scientist Steffi Henkel said these heavy rainfall events could lead to contamination from runoff.
“The water after heavy rain will contain higher levels of pathogens, bacteria and viruses,” she said. “It's best to avoid swimming for at least 24 hours after rain, especially if the water looks dirty, has an unpleasant smell, or shows signs of scum. Even if the water seems clear, it's wise to steer clear after rain, as there may be hidden harmful microbes present.”
This time of year also sees the return of toxic algae in rivers and streams.
Steffi said algae had already been spotted in the Omaka River, and it was crucial to keep an eye out, particularly if you have children or dogs.
“Algae toxins can be dangerous, requiring immediate veterinary care for dogs that ingest it, with symptoms appearing within 30 minutes. Humans may experience vomiting, diarrhoea, and skin irritation.”
Due to the vastness of Marlborough's waterways, it's not feasible to place warning signs everywhere.
“People need to stay vigilant, check for algae at their favourite rivers or streams, and if they spot any, find another place to go,” Steffi said.
