Stay updated with real-time air quality in Rayleigh, Essex 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)
31
Good
Rayleigh, Essex
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.26 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.81 μg/m³
0
55
155
255
425
605+
33.91 ppb
0
55
71
86
201
201+
0.42 ppb
0
36
76
186
605
1005+
2.77 ppb
0
54
101
361
1250
2050+
0.31 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Rayleigh, Essex
Rayleigh, Essex
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AQI 31
Good
4.36μg/m³
PM2.5
10.40μg/m³
PM10
33.60ppb
O3
0.42ppb
SO2
3.00ppb
NO2
0.31ppm
CO
AQI 31
Good
4.11μg/m³
PM2.5
8.96μg/m³
PM10
34.39ppb
O3
0.42ppb
SO2
2.43ppb
NO2
0.31ppm
CO
AQI 30
Good
4.84μg/m³
PM2.5
11.58μg/m³
PM10
31.89ppb
O3
0.44ppb
SO2
3.88ppb
NO2
0.31ppm
CO
AQI 31
Good
4.32μg/m³
PM2.5
10.43μg/m³
PM10
33.13ppb
O3
0.45ppb
SO2
3.49ppb
NO2
0.31ppm
CO
AQI 32
Good
4.05μg/m³
PM2.5
8.53μg/m³
PM10
34.60ppb
O3
0.42ppb
SO2
2.27ppb
NO2
0.31ppm
CO
AQI 31
Good
4.28μg/m³
PM2.5
10.46μg/m³
PM10
34.03ppb
O3
0.42ppb
SO2
2.87ppb
NO2
0.31ppm
CO
Air quality and pollutant data for Essex, 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 Rayleigh, Essex is updated every hour for accuracy.
In the past 24 hours, the air quality in Rayleigh, Essex was at its worst at 04:00:00 on 2026-09-28.
In the last 24 hours, the best air quality in Rayleigh, Essex was observed at 07:00:00 on 2026-09-28.
As of now, the AQI in Rayleigh, Essex is 31, indicating Good conditions.
Rayleigh, Essex air has the highest levels of O3.
Poor air quality in Rayleigh, Essex means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Rayleigh, Essex are currently 4.262 μg/m3.
The PM10 concentration in Rayleigh, Essex is 9.809 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Rayleigh, Essex is 0.312 ppm.
Currently, Rayleigh, Essex has a sulfur dioxide (SO2) concentration of 0.422 ppb.
The current ozone (O3) level in Rayleigh, Essex at the moment is 33.912 ppm.
Nitrogen dioxide (NO2) level in Rayleigh, Essex at the moment is 2.767 ppb.
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