Worst air pollution Helensburgh Tunnel - Helensburgh, today and tomorrow
Today (17 September): Air quality in Helensburgh Tunnel is fair. AQI, PM2.5, and PM10 are fair; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (PM2.5: 34.4/100).
Tomorrow (18 September 2026): Air quality in Helensburgh Tunnel is moderate. AQI worsens to moderate; PM2.5 increases to moderate; NO2 increases to fair; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 8:00 AM (PM2.5: 41.9/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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In Helensburgh Tunnel, with fewer vehicles on the road, nearby cropland dust and periodic burning outweigh traffic as a pollution source. Tree cover in the area softens the impact somewhat, catching particulates before they disperse further. Nearby areas with a similar setup tend to show a comparable air quality baseline.
Today - 17 September | Pollution peaks at 23:00
AQI:
Fair
34.4/100
PM2.5 (fine particles):
Fair
34.4/100
PM10 (coarse particles):
Fair
26.5/100
NO2 (nitrogen dioxide):
Good
17.6/100
O3 (ozone):
Good
9.9/100
SO2 (sulfur dioxide):
Good
5.9/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
5.4/100
PM1 (ultrafine particles):
Good
14.1/100
Levels show the poorest local air quality during the day
Tomorrow - 18 September | Pollution peaks at 08:00
AQI:
Moderate
41.9/100
PM2.5 (fine particles):
Moderate
41.9/100
PM10 (coarse particles):
Fair
31.9/100
NO2 (nitrogen dioxide):
Fair
35.6/100
O3 (ozone):
Good
16.8/100
SO2 (sulfur dioxide):
Good
12.1/100
CO (carbon monoxide):
Good
0.8/100
HCHO (formaldehyde):
Good
10.9/100
PM1 (ultrafine particles):
Fair
25.0/100
Other Landmarks in Helensburgh
Sports venues in Helensburgh
Frequently Asked Questions
Is air quality bad in Helensburgh Tunnel right now?
On 17 September 2026, overall air quality in Helensburgh Tunnel is fair. AQI is the main air quality indicator at 34.4/100. Pollution peaks around 11:00 PM (PM2.5: 34.4/100).
Will air quality be worse tomorrow in Helensburgh Tunnel?
On 18 September 2026, air quality conditions in Helensburgh Tunnel will be worse than today, with AQI forecast at moderate at 41.9/100. Pollution peaks around 8:00 AM (PM2.5: 41.9/100).
When is air pollution at its worst in Helensburgh Tunnel?
The colder months typically bring the heaviest particulate levels of the year, when winter inversions trap local heating smoke in place for days at a time. As the weather warms and fire risk rises, smoke haze tends to overtake other concerns in this area, as warm, dry conditions drive both ozone formation and periodic bushfire smoke from the surrounding region.
Are air quality levels in Helensburgh Tunnel 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: 16 September 2026 at 20:30 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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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