Worst air pollution Newtown, today and tomorrow
Today (20 September): Air quality in Newtown is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 22.0/100).
Tomorrow (21 September 2026): Air quality in Newtown is moderate. AQI worsens to moderate; PM2.5 increases to fair; PM10 increases to fair; NO2 increases to moderate; PM1 increases to moderate; all other pollutants stay as today. Pollution peaks around 10:00 PM (NO2: 50.2/100). 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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Newtown's air quality reflects its position within Powys, with local traffic and the town's built-up core as the main contributors. Rush-hour queues near the A40 are usually when readings climb the most. Southwesterly winds usually ensure decent dispersal, so levels generally stay within the moderate range typical of UK towns.
Today - 20 September | Pollution peaks at 16:00
AQI:
Fair
22.0/100
PM2.5 (fine particles):
Good
17.3/100
PM10 (coarse particles):
Good
17.7/100
NO2 (nitrogen dioxide):
Good
17.5/100
O3 (ozone):
Fair
22.0/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
2.4/100
PM1 (ultrafine particles):
Good
17.9/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 22:00
AQI:
Moderate
50.2/100
PM2.5 (fine particles):
Fair
31.0/100
PM10 (coarse particles):
Fair
22.7/100
NO2 (nitrogen dioxide):
Moderate
50.2/100
O3 (ozone):
Fair
25.9/100
SO2 (sulfur dioxide):
Good
4.1/100
CO (carbon monoxide):
Good
1.0/100
HCHO (formaldehyde):
Good
4.0/100
PM1 (ultrafine particles):
Moderate
43.2/100
Pollen forecast in Newtown
View pollen forecastFrequently Asked Questions
Is air quality bad in Newtown right now?
On 20 September 2026, overall air quality in Newtown is fair. AQI is the main air quality indicator at 22.0/100. Pollution peaks around 4:00 PM (O3: 22.0/100).
Will air quality be worse tomorrow in Newtown?
On 21 September 2026, air quality conditions in Newtown will be worse than today, with AQI forecast at moderate at 50.2/100. Pollution peaks around 10:00 PM (NO2: 50.2/100).
When is air pollution at its worst in Newtown?
Seasons make a real difference to air quality in Newtown, more than most people realise. Once the heating goes on and the air turns still, pollution from the A40 and nearby chimneys tends to build up rather than clear. By summer, ozone tends to rise on bright days, while better ventilation generally keeps particulate and NO₂ levels lower than winter. The shoulder seasons generally bring the mildest readings of the year.
Are air quality levels in Newtown 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: 20 September 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.
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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