Real-time air quality index in Harlow, Essex today
Stay updated with real-time air quality in Harlow, 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)
28
Good
Harlow, Essex
Last updated: ... (Local time)
Common air pollutants in Harlow, Essex
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
3.67 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
10.68 μg/m³
0
55
155
255
425
605+
Ozone (O3)
30.42 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.51 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
4.90 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.31 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Harlow, Essex
Harlow, Essex
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Harlow, Essex air quality map: Real-time AQI near you
Air quality in nearby cities
Sawbridgeworth, Hertfordshire
AQI 26
Good
2.87μg/m³
PM2.5
8.07μg/m³
PM10
28.02ppb
O3
0.52ppb
SO2
4.70ppb
NO2
0.31ppm
CO
Hoddesdon, Hertfordshire
AQI 28
Good
5.33μg/m³
PM2.5
8.08μg/m³
PM10
30.25ppb
O3
0.55ppb
SO2
7.49ppb
NO2
0.31ppm
CO
Epping, Essex
AQI 29
Good
3.14μg/m³
PM2.5
10.76μg/m³
PM10
31.47ppb
O3
0.52ppb
SO2
4.35ppb
NO2
0.31ppm
CO
Ware, Hertfordshire
AQI 33
Good
5.65μg/m³
PM2.5
9.90μg/m³
PM10
29.51ppb
O3
0.54ppb
SO2
4.79ppb
NO2
0.31ppm
CO
Waltham Abbey, Essex
AQI 27
Good
5.02μg/m³
PM2.5
9.87μg/m³
PM10
26.60ppb
O3
0.58ppb
SO2
5.82ppb
NO2
0.31ppm
CO
Cheshunt, Hertfordshire
AQI 27
Good
5.02μg/m³
PM2.5
9.57μg/m³
PM10
26.71ppb
O3
0.58ppb
SO2
5.58ppb
NO2
0.31ppm
CO
How accurate is Essex, UK air quality data?
Air quality measurements for Essex, UK meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Frequently asked questions
How frequently is the air quality data for Harlow, Essex updated?
Air quality data for Harlow, Essex is updated on an hourly basis.
When did Harlow, Essex experience the worst air quality in the last 24 hours?
The worst air quality in Harlow, Essex was recorded at 02:00:00 on 2026-09-28.
When did Harlow, Essex have its best air quality in the last 24 hours?
The best air quality in Harlow, Essex was recorded at 11:00:00 on 2026-09-28.
What is the real-time air quality index for Harlow, Essex?
The real-time air quality index in Harlow, Essex is 28, currently categorized as Good.
Which pollutant is found most often in Harlow, Essex?
The most common pollutant in Harlow, Essex is O3.
What can I do if the air quality in Harlow, Essex is poor?
If the air quality in Harlow, Essex is poor, limit outdoor activities and use a mask to safeguard your health.
What are the current PM2.5 levels in Harlow, Essex?
The measured PM2.5 levels in Harlow, Essex at present are 3.673 μg/m3.
What are the current PM10 levels at Harlow, Essex?
The current PM10 levels in Harlow, Essex are 10.678 μg/m3.
What are the current carbon monoxide (CO) levels at Harlow, Essex?
The current carbon monoxide (CO) level in Harlow, Essex is 0.312 ppm.
What are the current sulfur dioxide (SO2) levels at Harlow, Essex?
The current sulfur dioxide (SO2) levels in Harlow, Essex are 0.513 ppb.
What are the current ozone (O3) levels at Harlow, Essex?
The current ozone (O3) levels at Harlow, Essex is 30.422 ppm.
What are the current nitrogen dioxide (NO2) levels at Harlow, Essex?
The current nitrogen dioxide (NO2) levels at Harlow, Essex is 4.9 ppb.
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