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)
22
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)
1.72 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
13.22 μg/m³
0
55
155
255
425
605+
Ozone (O3)
23.71 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.38 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
1.97 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Harlow, Essex
Harlow, Essex
Scroll To Air Quality Map
Track live Harlow, Essex air quality forecast and history
Harlow Loading...
Harlow, Essex air quality map: Real-time AQI near you
Air quality in nearby cities
Sawbridgeworth, Hertfordshire
AQI 19
Good
3.01μg/m³
PM2.5
13.03μg/m³
PM10
20.42ppb
O3
0.42ppb
SO2
6.40ppb
NO2
0.45ppm
CO
Hoddesdon, Hertfordshire
AQI 22
Good
3.94μg/m³
PM2.5
16.36μg/m³
PM10
21.37ppb
O3
0.34ppb
SO2
8.37ppb
NO2
0.45ppm
CO
Epping, Essex
AQI 27
Good
5.16μg/m³
PM2.5
9.38μg/m³
PM10
20.26ppb
O3
0.44ppb
SO2
6.01ppb
NO2
0.45ppm
CO
Ware, Hertfordshire
AQI 22
Good
3.54μg/m³
PM2.5
9.77μg/m³
PM10
20.33ppb
O3
0.35ppb
SO2
5.89ppb
NO2
0.45ppm
CO
Waltham Abbey, Essex
AQI 22
Good
3.81μg/m³
PM2.5
16.76μg/m³
PM10
20.78ppb
O3
0.34ppb
SO2
5.49ppb
NO2
0.45ppm
CO
Cheshunt, Hertfordshire
AQI 22
Good
3.87μg/m³
PM2.5
16.56μg/m³
PM10
21.07ppb
O3
0.34ppb
SO2
6.94ppb
NO2
0.45ppm
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 12:00:00 on 2025-09-16.
When did Harlow, Essex have its best air quality in the last 24 hours?
The best air quality in Harlow, Essex was recorded at 01:00:00 on 2025-09-17.
What is the real-time air quality index for Harlow, Essex?
The real-time air quality index in Harlow, Essex is 27, currently categorized as Good.
Which pollutant is found most often in Harlow, Essex?
The most common pollutant in Harlow, Essex is PM2.5.
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 5.027 μg/m3.
What are the current PM10 levels at Harlow, Essex?
The current PM10 levels in Harlow, Essex are 13.88 μg/m3.
What are the current carbon monoxide (CO) levels at Harlow, Essex?
The current carbon monoxide (CO) level in Harlow, Essex is 0.445 ppm.
What are the current sulfur dioxide (SO2) levels at Harlow, Essex?
The current sulfur dioxide (SO2) levels in Harlow, Essex are 0.429 ppb.
What are the current ozone (O3) levels at Harlow, Essex?
The current ozone (O3) levels at Harlow, Essex is 20.097 ppm.
What are the current nitrogen dioxide (NO2) levels at Harlow, Essex?
The current nitrogen dioxide (NO2) levels at Harlow, Essex is 10.389 ppb.
All Rights Reserved © Ambee Inc. 2025