Worst air pollution Knighton, today and tomorrow
Today (9 August): Air quality in Knighton is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 48.9/100).
Tomorrow (10 August 2026): Air quality in Knighton is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 6:00 PM (O3: 24.6/100). Airmine updates local air quality forecasts four times daily.
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Knighton's position in Powys means air quality is mostly determined by local road traffic and the compact scale of the centre. Emissions along the A483 represent the town's main traffic-related pollution source. Thanks to light prevailing breezes, pollution rarely lingers for long, which keeps average readings fairly unremarkable by UK standards.
Today - 9 August | Pollution peaks at 16:00
AQI:
Medium
48.9/100
PM2.5 (fine particles):
Good
11.5/100
PM10 (coarse particles):
Good
3.1/100
NO2 (nitrogen dioxide):
Good
7.5/100
O3 (ozone):
Medium
48.9/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.3/100
PM1 (ultrafine particles):
Good
15.4/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 18:00
AQI:
Fair
24.6/100
PM2.5 (fine particles):
Good
4.0/100
PM10 (coarse particles):
Good
1.4/100
NO2 (nitrogen dioxide):
Good
2.9/100
O3 (ozone):
Fair
24.6/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.4/100
PM1 (ultrafine particles):
Good
3.1/100
Pollen forecast in Knighton
View pollen forecastFrequently Asked Questions
Is air quality bad in Knighton right now?
On 9 August 2026, overall air quality in Knighton is medium. AQI is the main air quality indicator at 48.9/100. Pollution peaks around 4:00 PM (O3: 48.9/100).
Will air quality be worse tomorrow in Knighton?
On 10 August 2026, air quality conditions in Knighton will be worse than today, with AQI forecast at fair at 24.6/100. Pollution peaks around 6:00 PM (O3: 24.6/100).
When is air pollution at its worst in Knighton?
Knighton doesn't have one fixed air quality level — it swings between two extremes each year. Summer sunshine can drive up ozone locally, though overall air generally moves and clears more freely than in winter. Winter mornings can be the trickiest, with cold, still conditions trapping A483 traffic fumes and smoke from home fires close to the ground. Most of spring and autumn stays fairly steady, right in the middle of those two extremes.
Are air quality levels in Knighton 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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