Worst air pollution Royston, today and tomorrow
Today (16 July): Air quality in Royston 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: 31.6/100).
Tomorrow (17 July 2026): Air quality in Royston is fair. NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 37.8/100). 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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Like much of Hertfordshire, Royston's air quality is shaped less by industry these days and more by everyday road traffic. Northwesterly winds off the coast help ventilate the town centre, keeping air quality at moderate levels typical for the region. Rush-hour queues near the A55 are usually when readings climb the most.
Today - 16 July | Pollution peaks at 16:00
AQI:
Fair
31.6/100
PM2.5 (fine particles):
Good
9.5/100
PM10 (coarse particles):
Good
3.4/100
NO2 (nitrogen dioxide):
Good
16.8/100
O3 (ozone):
Fair
31.6/100
SO2 (sulfur dioxide):
Good
2.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.8/100
PM1 (ultrafine particles):
Good
8.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:00
AQI:
Fair
37.8/100
PM2.5 (fine particles):
Good
14.5/100
PM10 (coarse particles):
Good
5.0/100
NO2 (nitrogen dioxide):
Fair
22.0/100
O3 (ozone):
Fair
37.8/100
SO2 (sulfur dioxide):
Good
4.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.0/100
PM1 (ultrafine particles):
Good
13.0/100
Pollen forecast in Royston
View pollen forecastFrequently Asked Questions
Is air quality bad in Royston right now?
On 16 July 2026, overall air quality in Royston is fair. AQI is the main air quality indicator at 31.6/100. Pollution peaks around 4:00 PM (O3: 31.6/100).
Will air quality be worse tomorrow in Royston?
On 17 July 2026, air quality conditions in Royston will be similar to today, with AQI forecast at fair at 37.8/100. Pollution peaks around 3:00 PM (O3: 37.8/100).
When is air pollution at its worst in Royston?
There's a clear yearly cycle to air quality in Royston if you look closely. Through the colder months, readings near the A55 often rise, since chimney smoke and stagnant air stop pollutants clearing away. 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. For much of spring and autumn, things settle into a fairly unremarkable middle ground.
Are air quality levels in Royston 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