1 February 2023 - Public Health Advisory Update - Avoid flood waters, stream, river and harbour water
Avoid flood waters - streams, rivers and harbours
Although the State of Emergency has now been lifted in Northland, we are asking people to remain vigilant around waterways, flood waters and all harbours.
After heavy rainfall, overflow from wastewater systems and other contaminants on land can be washed into our lakes, streams, rivers and coastal waters. Always assume floodwater is contaminated. These contaminants can cause irritation or infection of our stomach, lungs, skin and eyes and pose a risk to our health. Therefore, we advise keeping out of the water until it is clear (generally five days after the storm ends). Water quality information at common swimming sites in Northland is regularly updated at Safeswim(external link).
Contamination
Floodwater can carry bacteria that can contaminate food.
- Throw away all food and drinking water that has come in contact with floodwater, including things stored in containers. It is impossible to know if containers have been damaged and the seals compromised.
- Do not eat garden produce if the soil has been flooded. Clean up and remove debris and sprinkle gardens with lime.
Kaimoana
Do not consume shellfish or wet fish caught in the storm area. Shellfish can remain contaminated for several weeks. Therefore, we advise people to avoid collecting shellfish for at least 28 days after the extreme event or until water testing indicates it is safe.
Drinking Water
For those on a reticulated water supply, follow any boil water notices from your local council if they are issued. If you have a self-supply, ensure that your water collection systems remain clear of debris before and after a severe weather event. If you collect water directly from a natural stream or lake, we advise you avoid water collection during severe rain events and until five (5) days after the storm ends and the water appears and smells clear.
Property
If your property has been damaged by floodwater, you can find advice on managing health and safety risks here(external link).
If you have come into contact with flood waters or sea water and feel unwell with gastroenteritis (diarrhoea, vomiting) or skin infections, get in touch with your doctor or call Healthline for free on 0800 611 116 for advice.
For more information, visit the Ministry of Health website(external link).
Power outages
If you have experienced any power outages, please take precautions with food stored, particularly in fridges and freezers. Check this link(external link) for advice about food safety.
Information on weather warnings and flood risks can be found here(external link). The situation will be reassessed in 24 hours and a further update will be provided.
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