Worst air pollution Haverfordwest, today and tomorrow
Today (16 July): Air quality in Haverfordwest is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (NO2: 37.5/100).
Tomorrow (17 July 2026): Air quality in Haverfordwest is fair. AQI improves to medium; PM2.5 increases to fair; NO2 decreases to medium; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 1:00 AM (NO2: 43.8/100). 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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Emissions along the A55 represent the town's main traffic-related pollution source. Like much of Pembrokeshire, Haverfordwest's air quality is shaped less by industry these days and more by everyday road traffic. Southwesterly winds tend to disperse pollutants reasonably well, keeping readings close to typical UK small-town levels.
Today - 16 July | Pollution peaks at 23:00
AQI:
Fair
37.5/100
PM2.5 (fine particles):
Good
14.6/100
PM10 (coarse particles):
Good
5.2/100
NO2 (nitrogen dioxide):
Fair
37.5/100
O3 (ozone):
Fair
31.6/100
SO2 (sulfur dioxide):
Good
7.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.8/100
PM1 (ultrafine particles):
Good
12.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 01:00
AQI:
Medium
43.8/100
PM2.5 (fine particles):
Fair
22.2/100
PM10 (coarse particles):
Good
7.8/100
NO2 (nitrogen dioxide):
Medium
43.8/100
O3 (ozone):
Fair
37.8/100
SO2 (sulfur dioxide):
Good
12.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.0/100
PM1 (ultrafine particles):
Fair
20.0/100
Pollen forecast in Haverfordwest
View pollen forecastFrequently Asked Questions
Is air quality bad in Haverfordwest right now?
On 16 July 2026, overall air quality in Haverfordwest is fair. AQI is the main air quality indicator at 37.5/100. Pollution peaks around 11:00 PM (NO2: 37.5/100).
Will air quality be worse tomorrow in Haverfordwest?
On 17 July 2026, air quality conditions in Haverfordwest will be similar to today, with O3 forecast at fair at 37.8/100. Pollution peaks around 1:00 AM (NO2: 43.8/100).
When is air pollution at its worst in Haverfordwest?
Here's the thing about Haverfordwest: air quality has a clear seasonal rhythm. In deep winter, a lack of wind lets A55 traffic fumes and woodsmoke settle instead of blowing through. Summer sunshine can drive up ozone locally, though overall air generally moves and clears more freely than in winter. Spring and autumn usually sit somewhere in between, so it's really the extremes of the year worth watching.
Are air quality levels in Haverfordwest 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