Stay updated with real-time air quality in Colchester, 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)
22
Good
Colchester, Essex
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
3.93 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
7.75 μg/m³
0
55
155
255
425
605+
24.43 ppb
0
55
71
86
201
201+
1.06 ppb
0
36
76
186
605
1005+
2.57 ppb
0
54
101
361
1250
2050+
0.04 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Colchester, Essex
Colchester, Essex
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AQI 20
Good
3.37μg/m³
PM2.5
8.56μg/m³
PM10
21.77ppb
O3
1.05ppb
SO2
2.14ppb
NO2
0.03ppm
CO
AQI 20
Good
3.36μg/m³
PM2.5
6.70μg/m³
PM10
21.99ppb
O3
1.05ppb
SO2
2.14ppb
NO2
0.03ppm
CO
AQI 22
Good
3.80μg/m³
PM2.5
8.32μg/m³
PM10
21.78ppb
O3
1.05ppb
SO2
2.70ppb
NO2
0.03ppm
CO
AQI 23
Good
3.75μg/m³
PM2.5
7.36μg/m³
PM10
24.63ppb
O3
1.04ppb
SO2
2.18ppb
NO2
0.04ppm
CO
AQI 22
Good
3.68μg/m³
PM2.5
8.59μg/m³
PM10
20.29ppb
O3
1.06ppb
SO2
2.10ppb
NO2
0.03ppm
CO
AQI 22
Good
3.90μg/m³
PM2.5
8.32μg/m³
PM10
21.50ppb
O3
1.04ppb
SO2
2.96ppb
NO2
0.03ppm
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 Colchester, Essex is updated every hour for accuracy.
In the past 24 hours, the air quality in Colchester, Essex was at its worst at 07:00:00 on 2025-06-05.
In the last 24 hours, the best air quality in Colchester, Essex was observed at 06:00:00 on 2025-06-06.
As of now, the AQI in Colchester, Essex is 22, indicating Good conditions.
Colchester, Essex air has the highest levels of O3.
Poor air quality in Colchester, Essex means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Colchester, Essex are currently 3.928 μg/m3.
The PM10 concentration in Colchester, Essex is 7.752 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Colchester, Essex is 0.037 ppm.
Currently, Colchester, Essex has a sulfur dioxide (SO2) concentration of 1.058 ppb.
The current ozone (O3) level in Colchester, Essex at the moment is 24.431 ppm.
Nitrogen dioxide (NO2) level in Colchester, Essex at the moment is 2.566 ppb.
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