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)
39
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+
9.98 μg/m³
0
55
155
255
425
605+
42.04 ppb
0
55
71
86
201
201+
0.41 ppb
0
36
76
186
605
1005+
3.60 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Rayleigh, Essex
Rayleigh, Essex
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AQI 37
Good
4.46μg/m³
PM2.5
10.27μg/m³
PM10
39.80ppb
O3
0.38ppb
SO2
4.32ppb
NO2
0.17ppm
CO
AQI 36
Good
4.16μg/m³
PM2.5
9.58μg/m³
PM10
38.55ppb
O3
0.39ppb
SO2
3.33ppb
NO2
0.17ppm
CO
AQI 38
Good
4.92μg/m³
PM2.5
10.20μg/m³
PM10
41.05ppb
O3
0.38ppb
SO2
5.05ppb
NO2
0.17ppm
CO
AQI 40
Good
3.81μg/m³
PM2.5
10.86μg/m³
PM10
43.04ppb
O3
0.40ppb
SO2
4.45ppb
NO2
0.17ppm
CO
AQI 35
Good
4.07μg/m³
PM2.5
9.36μg/m³
PM10
38.20ppb
O3
0.39ppb
SO2
3.04ppb
NO2
0.17ppm
CO
AQI 37
Good
4.39μg/m³
PM2.5
10.52μg/m³
PM10
39.85ppb
O3
0.38ppb
SO2
4.38ppb
NO2
0.17ppm
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 05:00:00 on 2026-06-29.
In the last 24 hours, the best air quality in Rayleigh, Essex was observed at 10:00:00 on 2026-06-29.
As of now, the AQI in Rayleigh, Essex is 39, 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 9.985 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Rayleigh, Essex is 0.174 ppm.
Currently, Rayleigh, Essex has a sulfur dioxide (SO2) concentration of 0.409 ppb.
The current ozone (O3) level in Rayleigh, Essex at the moment is 42.04 ppm.
Nitrogen dioxide (NO2) level in Rayleigh, Essex at the moment is 3.599 ppb.
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