Worst air pollution Penzance, today and tomorrow
Today (16 July): Air quality in Penzance is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 PM (O3: 25.9/100).
Tomorrow (17 July 2026): Air quality in Penzance is fair. All pollutants stay as today. Pollution peaks around 12:00 AM (O3: 23.7/100). 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
Use our Strava plugin to check your own exposure.
Penzance's position in Cornwall means air quality is mostly determined by local road traffic and the compact scale of the centre. Shifting coastal winds usually ensure decent dispersal, so levels generally stay within the moderate range typical of UK towns. The M27 sees the heaviest traffic, and that shows up clearly in local roadside monitoring.
Today - 16 July | Pollution peaks at 18:00
AQI:
Fair
25.9/100
PM2.5 (fine particles):
Good
10.8/100
PM10 (coarse particles):
Good
4.2/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
25.9/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
1.3/100
PM1 (ultrafine particles):
Good
7.0/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 00:00
AQI:
Fair
23.7/100
PM2.5 (fine particles):
Good
13.0/100
PM10 (coarse particles):
Good
4.8/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
23.7/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
1.6/100
PM1 (ultrafine particles):
Good
10.1/100
Pollen forecast in Penzance
View pollen forecastFrequently Asked Questions
Is air quality bad in Penzance right now?
On 16 July 2026, overall air quality in Penzance is fair. AQI is the main air quality indicator at 25.9/100. Pollution peaks around 6:00 PM (O3: 25.9/100).
Will air quality be worse tomorrow in Penzance?
On 17 July 2026, air quality conditions in Penzance will be similar to today, with AQI forecast at fair at 23.7/100. Pollution peaks around 12:00 AM (O3: 23.7/100).
When is air pollution at its worst in Penzance?
Spring and autumn usually sit somewhere in between, so it's really the extremes of the year worth watching. Penzance doesn't have one fixed air quality level — it swings between two extremes each year. The coldest months usually bring the worst readings, as heating and temperature inversions keep M27 emissions from dispersing normally. Summer brings a different issue — stronger sunlight can push up ozone levels on hot, sunny days, even though traffic pollution itself often disperses more easily.
Are air quality levels in Penzance 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.
Want to see air quality forecasts for other cities in United Kingdom?
Check air quality in other popular cities:
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