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)
27
Good
Holywood, Ards and North Down
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.00 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.71 μg/m³
0
55
155
255
425
605+
29.15 ppb
0
55
71
86
201
201+
1.00 ppb
0
36
76
186
605
1005+
13.06 ppb
0
54
101
361
1250
2050+
0.31 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 27
Good
4.12μg/m³
PM2.5
15.07μg/m³
PM10
29.38ppb
O3
0.98ppb
SO2
11.22ppb
NO2
0.31ppm
CO
AQI 27
Good
4.12μg/m³
PM2.5
14.28μg/m³
PM10
29.36ppb
O3
1.09ppb
SO2
14.68ppb
NO2
0.31ppm
CO
AQI 30
Good
4.17μg/m³
PM2.5
13.91μg/m³
PM10
31.58ppb
O3
1.04ppb
SO2
14.71ppb
NO2
0.31ppm
CO
AQI 29
Good
3.89μg/m³
PM2.5
14.66μg/m³
PM10
31.34ppb
O3
0.95ppb
SO2
9.38ppb
NO2
0.31ppm
CO
AQI 29
Good
3.88μg/m³
PM2.5
14.17μg/m³
PM10
30.92ppb
O3
0.97ppb
SO2
9.99ppb
NO2
0.31ppm
CO
AQI 27
Good
3.87μg/m³
PM2.5
14.18μg/m³
PM10
29.32ppb
O3
1.27ppb
SO2
13.93ppb
NO2
0.31ppm
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 2026-09-28.
In the last 24 hours, the best air quality in Holywood, Ards and North Down was observed at 07:00:00 on 2026-09-28.
As of now, the AQI in Holywood, Ards and North Down is 27, 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 4.002 μg/m3.
The PM10 concentration in Holywood, Ards and North Down is 14.705 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Holywood, Ards and North Down is 0.312 ppm.
Currently, Holywood, Ards and North Down has a sulfur dioxide (SO2) concentration of 0.998 ppb.
The current ozone (O3) level in Holywood, Ards and North Down at the moment is 29.149 ppm.
Nitrogen dioxide (NO2) level in Holywood, Ards and North Down at the moment is 13.065 ppb.
All Rights Reserved © Ambee Inc. 2025