Stay updated with real-time air quality in Holywood, Ards and North Down featuring accurate data on AQI, PM2.5, PM10, O3, NO2, SO2, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.
Live AQI (Air Quality Index)
22
Good
Holywood, Ards and North Down
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.63 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.41 μg/m³
0
55
155
255
425
605+
22.82 ppb
0
55
71
86
201
201+
0.47 ppb
0
36
76
186
605
1005+
9.20 ppb
0
54
101
361
1250
2050+
0.09 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Holywood, Ards and North Down
Holywood, Ards and North Down
Scroll To Air Quality MapLoading...
AQI 22
Good
3.53μg/m³
PM2.5
9.14μg/m³
PM10
22.94ppb
O3
0.47ppb
SO2
12.56ppb
NO2
0.09ppm
CO
AQI 22
Good
3.77μg/m³
PM2.5
9.78μg/m³
PM10
23.54ppb
O3
0.49ppb
SO2
9.17ppb
NO2
0.09ppm
CO
AQI 22
Good
4.21μg/m³
PM2.5
10.38μg/m³
PM10
22.96ppb
O3
0.39ppb
SO2
11.73ppb
NO2
0.09ppm
CO
AQI 22
Good
3.56μg/m³
PM2.5
9.76μg/m³
PM10
23.64ppb
O3
0.52ppb
SO2
11.94ppb
NO2
0.09ppm
CO
AQI 22
Good
3.75μg/m³
PM2.5
10.78μg/m³
PM10
24.18ppb
O3
0.52ppb
SO2
12.30ppb
NO2
0.09ppm
CO
AQI 22
Good
3.82μg/m³
PM2.5
10.75μg/m³
PM10
23.68ppb
O3
0.51ppb
SO2
8.93ppb
NO2
0.09ppm
CO
Air quality and pollutant data for Ards and North Down, UK are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Holywood, Ards and North Down is updated every hour for accuracy.
In the past 24 hours, the air quality in Holywood, Ards and North Down was at its worst at 07:00:00 on 2026-08-13.
In the last 24 hours, the best air quality in Holywood, Ards and North Down was observed at 02:00:00 on 2026-08-14.
As of now, the AQI in Holywood, Ards and North Down is 22, indicating Good conditions.
Holywood, Ards and North Down air has the highest levels of PM2.5.
Poor air quality in Holywood, Ards and North Down means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Holywood, Ards and North Down are currently 3.635 μg/m3.
The PM10 concentration in Holywood, Ards and North Down is 9.408 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Holywood, Ards and North Down is 0.087 ppm.
Currently, Holywood, Ards and North Down has a sulfur dioxide (SO2) concentration of 0.474 ppb.
The current ozone (O3) level in Holywood, Ards and North Down at the moment is 22.82 ppm.
Nitrogen dioxide (NO2) level in Holywood, Ards and North Down at the moment is 9.203 ppb.
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