Stay updated with real-time air quality in St Helens, Merseyside 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)
44
Good
St Helens, Merseyside
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
3.68 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.08 μg/m³
0
55
155
255
425
605+
48.12 ppb
0
55
71
86
201
201+
0.85 ppb
0
36
76
186
605
1005+
10.05 ppb
0
54
101
361
1250
2050+
0.10 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
St Helens, Merseyside
St Helens, Merseyside
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AQI 44
Good
6.40μg/m³
PM2.5
18.56μg/m³
PM10
47.36ppb
O3
0.86ppb
SO2
8.02ppb
NO2
0.10ppm
CO
AQI 44
Good
6.38μg/m³
PM2.5
18.24μg/m³
PM10
47.56ppb
O3
0.90ppb
SO2
8.06ppb
NO2
0.10ppm
CO
AQI 44
Good
7.54μg/m³
PM2.5
18.84μg/m³
PM10
46.99ppb
O3
0.84ppb
SO2
6.22ppb
NO2
0.10ppm
CO
AQI 49
Good
8.57μg/m³
PM2.5
20.89μg/m³
PM10
46.78ppb
O3
0.85ppb
SO2
7.00ppb
NO2
0.10ppm
CO
AQI 49
Good
8.69μg/m³
PM2.5
20.63μg/m³
PM10
46.90ppb
O3
0.98ppb
SO2
5.52ppb
NO2
0.10ppm
CO
AQI 44
Good
8.28μg/m³
PM2.5
19.43μg/m³
PM10
46.85ppb
O3
0.84ppb
SO2
5.94ppb
NO2
0.10ppm
CO
Air quality data and pollutant measurements for Merseyside, UK adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for St Helens, Merseyside is updated every hour.
The worst air quality in St Helens, Merseyside in the last 24 hours was observed at 08:00:00 on 2025-06-12.
In the last 24 hrs, the best air quality in St Helens, Merseyside was observed at 10:00:00 on 2025-06-12.
The current air quality in St Helens, Merseyside is 44, categorized as Good based on real-time data.
The most common pollutant in St Helens, Merseyside is O3.
If the air quality in St Helens, Merseyside is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at St Helens, Merseyside is 3.684 μg/m3.
The current PM10 concentration at St Helens, Merseyside is 16.078 μg/m3.
The current carbon monoxide (CO) concentration at St Helens, Merseyside is 0.101 ppm.
The current sulfur dioxide (SO2) concentration at St Helens, Merseyside is 0.848 ppb.
The current ozone (O3) concentration at St Helens, Merseyside is 48.121 ppm.
The current nitrogen dioxide (NO2) concentration at St Helens, Merseyside is 10.051 ppb.
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