Worst air pollution St Helens, today and tomorrow
Today (10 August): Air quality in St Helens is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 PM (O3: 18.1/100).
Tomorrow (11 August 2026): Air quality in St Helens is good. All pollutants stay as today. Pollution peaks around 12:00 AM (O3: 17.8/100). Airmine updates local air quality forecasts four times daily.
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On Tasmania's sheltered east coast, St Helens enjoys some of the cleanest air on the island, thanks to consistent exposure to the Roaring Forties and its relatively open, non-basin coastal setting. Wood heater smoke, the standout winter issue in Tasmania's inland valley towns, is less of a concern here given the town's better ventilation. Bushfire smoke remains a modest seasonal risk between January and March, when dry conditions can affect surrounding bushland. Outside these periods, this coastal fishing town typically records excellent air quality year-round, benefiting from its position facing the Tasman Sea rather than tucked into a valley.
Today - 10 August | Pollution peaks at 22:00
AQI:
Good
18.1/100
PM2.5 (fine particles):
Good
6.4/100
PM10 (coarse particles):
Good
2.5/100
NO2 (nitrogen dioxide):
Good
5.4/100
O3 (ozone):
Good
18.1/100
SO2 (sulfur dioxide):
Good
3.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
4.4/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 00:00
AQI:
Good
17.8/100
PM2.5 (fine particles):
Good
9.2/100
PM10 (coarse particles):
Good
4.0/100
NO2 (nitrogen dioxide):
Good
2.1/100
O3 (ozone):
Good
17.8/100
SO2 (sulfur dioxide):
Good
2.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.2/100
PM1 (ultrafine particles):
Good
1.5/100
Frequently Asked Questions
Is air quality bad in St Helens right now?
On 10 August 2026, overall air quality in St Helens is good. AQI is the main air quality indicator at 18.1/100. Pollution peaks around 10:00 PM (O3: 18.1/100).
Will air quality be worse tomorrow in St Helens?
On 11 August 2026, air quality conditions in St Helens will be similar to today, with AQI forecast at good at 17.8/100. Pollution peaks around 12:00 AM (O3: 17.8/100).
When is air pollution at its worst in St Helens?
Anyone tracking air quality in St Helens should keep an eye on winter (June-August), when wood-heater smoke settles on cold, still nights, especially in basin towns. Beyond winter smoke, constant westerlies off the Southern Ocean keep air among the best around. Keeping half an eye on forecasts during that stretch is the practical takeaway otherwise.
Are air quality levels in St Helens based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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