Health NZ | Te Whatu Ora is working with other agencies to assess the public health impacts of dust generated from airborne silt in Hawke's Bay and Tairawhiti.
The silt testing programme's ongoing tests show contamination of the silt by heavy metals, herbicides, and pesticides is likely to be very low.
Silt FAQs — Hawke's Bay Regional Council
However, airborne dust from any source, including dried out silt, is not healthy to breathe. The dust itself can irritate eyes and upper airways, and worsen sysmptoms for those with heart or lung conditions. This is particularly important for pēpi and tamariki, who can be more vulnerable to health impacts from air pollution.
Until more is known from air quality monitoring in affected regions, it is important to take precautions during times when dust is a significant issue.
When to take precautions
If dust levels are high and you can see, smell or taste dust in the air, or visibility is reduced, it is a good idea to take precautions.
Tamariki health
Make sure tamariki with respiratory or other pre-existing health conditions follow their treatment plan. Talk with your school's public health nurse if you need any support with this.
How to reduce exposure of tamariki when dust levels are high
- If possible, keep tamariki indoors and close windows and doors.
- Stay in air-conditioned rooms. Make sure air conditioners are set to recirculate indoor air and that filters, HEPA filters are recommended, are kept clean.
- Try to keep outside time to a minimum and avoid vigorous exercise.
- Watch for symptoms like coughing, wheezing or difficulty breathing. Keep tamariki inside if they show symptoms. Call 111 for an ambulance if anyone has trouble breathing.
- If all tamariki are not being kept inside, try to provide an indoor area where they can choose to stay inside. For example, if they have asthma or other health conditions, are sensitive to dust, or are worried about the dust.
- Wear sunglasses outside to reduce the amount of dust getting in eyes, as well providing sun protection.
How to keep indoor air clean
- Check seals around doors and windows.
- Check air conditioners — Your air conditioning technician should be able to provide advice.
- Regularly clean inside areas to remove dust. Use wet methods such as mops and damp cloths. Avoid dry sweeping and dusting as it can kick dust up into the air.
- Vacuuming can increase dust levels so try to use vacuum cleaners with a HEPA filter.
- On days when dust levels are low, open doors and windows to air out buildings.
If exposure to dust cannot be avoided
Wear a mask if dust exposure cannot be avoided. Tamariki can wear a dust mask if they are over 2 and are able to tell you if the mask is uncomfortable.
Proper face-fitting masks like P2 and N95 provide the best personal protection. However, even surgical masks will still offer some protection from dust.
Make sure masks fit correctly. The mask should fully cover the nose and mouth without gaps around the nose cheeks and chin. Straps should go above and below the ears.
Replace masks as often as suggested by the manufacturer.