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)
24
Good
Holywood, Ards and North Down
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.45 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
11.27 μg/m³
0
55
155
255
425
605+
26.24 ppb
0
55
71
86
201
201+
3.79 ppb
0
36
76
186
605
1005+
20.41 ppb
0
54
101
361
1250
2050+
0.73 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Holywood, Ards and North Down
Holywood, Ards and North Down
Scroll To Air Quality MapLoading...
AQI 26
Good
4.35μg/m³
PM2.5
11.36μg/m³
PM10
27.57ppb
O3
3.57ppb
SO2
17.09ppb
NO2
0.77ppm
CO
AQI 33
Good
5.67μg/m³
PM2.5
9.20μg/m³
PM10
28.22ppb
O3
5.77ppb
SO2
19.20ppb
NO2
0.77ppm
CO
AQI 25
Good
4.32μg/m³
PM2.5
13.44μg/m³
PM10
27.02ppb
O3
1.05ppb
SO2
20.70ppb
NO2
0.77ppm
CO
AQI 27
Good
5.43μg/m³
PM2.5
9.33μg/m³
PM10
28.02ppb
O3
4.72ppb
SO2
22.23ppb
NO2
0.77ppm
CO
AQI 33
Good
5.62μg/m³
PM2.5
9.57μg/m³
PM10
27.07ppb
O3
4.94ppb
SO2
23.73ppb
NO2
0.77ppm
CO
AQI 33
Good
5.67μg/m³
PM2.5
9.58μg/m³
PM10
27.86ppb
O3
6.14ppb
SO2
18.55ppb
NO2
0.77ppm
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 02:00:00 on 2026-11-12.
In the last 24 hours, the best air quality in Holywood, Ards and North Down was observed at 02:00:00 on 2026-11-12.
As of now, the AQI in Holywood, Ards and North Down is 24, indicating Good conditions.
Holywood, Ards and North Down air has the highest levels of O3.
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 4.45 μg/m3.
The PM10 concentration in Holywood, Ards and North Down is 11.265 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Holywood, Ards and North Down is 0.728 ppm.
Currently, Holywood, Ards and North Down has a sulfur dioxide (SO2) concentration of 3.785 ppb.
The current ozone (O3) level in Holywood, Ards and North Down at the moment is 26.239 ppm.
Nitrogen dioxide (NO2) level in Holywood, Ards and North Down at the moment is 20.415 ppb.
All Rights Reserved © Ambee Inc. 2025