Worst air pollution St Helens, today and tomorrow
Today (16 July): Air quality in St Helens is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 14.8/100).
Tomorrow (17 July 2026): Air quality in St Helens is good. All pollutants stay as today. Pollution peaks around 3:00 PM (O3: 16.1/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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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 - 16 July | Pollution peaks at 16:00
AQI:
Good
14.8/100
PM2.5 (fine particles):
Good
3.1/100
PM10 (coarse particles):
Good
1.2/100
NO2 (nitrogen dioxide):
Good
7.6/100
O3 (ozone):
Good
14.8/100
SO2 (sulfur dioxide):
Good
2.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
2.1/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:00
AQI:
Good
16.1/100
PM2.5 (fine particles):
Good
5.2/100
PM10 (coarse particles):
Good
2.0/100
NO2 (nitrogen dioxide):
Good
5.2/100
O3 (ozone):
Good
16.1/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.6/100
PM1 (ultrafine particles):
Good
3.1/100
Frequently Asked Questions
Is air quality bad in St Helens right now?
On 16 July 2026, overall air quality in St Helens is good. AQI is the main air quality indicator at 14.8/100. Pollution peaks around 4:00 PM (O3: 14.8/100).
Will air quality be worse tomorrow in St Helens?
On 17 July 2026, air quality conditions in St Helens will be similar to today, with AQI forecast at good at 16.1/100. Pollution peaks around 3:00 PM (O3: 16.1/100).
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.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app