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)
23
Good
Holywood, Ards and North Down
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.83 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
7.55 μg/m³
0
55
155
255
425
605+
24.69 ppb
0
55
71
86
201
201+
0.56 ppb
0
36
76
186
605
1005+
10.45 ppb
0
54
101
361
1250
2050+
0.39 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Holywood, Ards and North Down
Holywood, Ards and North Down
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AQI 20
Good
2.25μg/m³
PM2.5
7.63μg/m³
PM10
22.19ppb
O3
0.64ppb
SO2
11.61ppb
NO2
0.20ppm
CO
AQI 24
Good
2.49μg/m³
PM2.5
7.07μg/m³
PM10
25.85ppb
O3
0.71ppb
SO2
6.18ppb
NO2
0.20ppm
CO
AQI 21
Good
1.80μg/m³
PM2.5
4.47μg/m³
PM10
22.99ppb
O3
0.66ppb
SO2
9.99ppb
NO2
0.20ppm
CO
AQI 25
Good
2.87μg/m³
PM2.5
7.07μg/m³
PM10
26.68ppb
O3
0.63ppb
SO2
9.86ppb
NO2
0.20ppm
CO
AQI 26
Good
2.61μg/m³
PM2.5
6.73μg/m³
PM10
27.84ppb
O3
0.65ppb
SO2
9.82ppb
NO2
0.20ppm
CO
AQI 25
Good
2.39μg/m³
PM2.5
7.80μg/m³
PM10
26.56ppb
O3
0.73ppb
SO2
5.24ppb
NO2
0.20ppm
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 2026-10-05.
In the last 24 hours, the best air quality in Holywood, Ards and North Down was observed at 09:00:00 on 2026-10-05.
As of now, the AQI in Holywood, Ards and North Down is 21, 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 2.287 μg/m3.
The PM10 concentration in Holywood, Ards and North Down is 6.751 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Holywood, Ards and North Down is 0.203 ppm.
Currently, Holywood, Ards and North Down has a sulfur dioxide (SO2) concentration of 0.649 ppb.
The current ozone (O3) level in Holywood, Ards and North Down at the moment is 23.094 ppm.
Nitrogen dioxide (NO2) level in Holywood, Ards and North Down at the moment is 11.483 ppb.
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