Stay updated with real-time air quality in Waltham Cross, Hertfordshire 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)
49
Good
Waltham Cross, Hertfordshire
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
8.80 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
28.48 μg/m³
0
55
155
255
425
605+
35.95 ppb
0
55
71
86
201
201+
0.90 ppb
0
36
76
186
605
1005+
6.29 ppb
0
54
101
361
1250
2050+
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Waltham Cross, Hertfordshire
Waltham Cross, Hertfordshire
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AQI 49
Good
8.94μg/m³
PM2.5
27.57μg/m³
PM10
35.74ppb
O3
0.90ppb
SO2
7.83ppb
NO2
0.27ppm
CO
AQI 49
Good
8.80μg/m³
PM2.5
28.51μg/m³
PM10
35.95ppb
O3
0.90ppb
SO2
6.09ppb
NO2
0.27ppm
CO
AQI 49
Good
9.24μg/m³
PM2.5
26.04μg/m³
PM10
34.91ppb
O3
0.91ppb
SO2
7.97ppb
NO2
0.27ppm
CO
AQI 49
Good
9.34μg/m³
PM2.5
25.48μg/m³
PM10
34.70ppb
O3
0.91ppb
SO2
8.39ppb
NO2
0.27ppm
CO
AQI 49
Good
9.09μg/m³
PM2.5
26.63μg/m³
PM10
35.52ppb
O3
0.90ppb
SO2
8.61ppb
NO2
0.27ppm
CO
AQI 33
Good
5.66μg/m³
PM2.5
18.76μg/m³
PM10
36.37ppb
O3
0.85ppb
SO2
5.75ppb
NO2
0.27ppm
CO
The air quality data for Hertfordshire, UK is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Waltham Cross, Hertfordshire are available every hour.
Waltham Cross, Hertfordshire experienced its worst air quality at 01:00:00, 2025-06-13.
The best air quality in Waltham Cross, Hertfordshire was observed at 08:00:00 on 2025-06-13.
The air quality in Waltham Cross, Hertfordshire right now is Good, with an AQI of 49.
In Waltham Cross, Hertfordshire, PM2.5 is the most frequently found pollutant.
When air quality in Waltham Cross, Hertfordshire is compromised, staying indoors and wearing a mask can reduce health risks.
Waltham Cross, Hertfordshire currently has a PM2.5 concentration of 8.801 μg/m3.
Waltham Cross, Hertfordshire currently has a PM10 concentration of 28.479 μg/m3.
The current carbon monoxide (CO) level in Waltham Cross, Hertfordshire is 0.266 ppm.
The current sulfur dioxide (SO2) concentration in Waltham Cross, Hertfordshire is 0.897 ppb.
Waltham Cross, Hertfordshire currently has an ozone (O3) concentration of 35.949 ppm.
The current level of nitrogen dioxide (NO2) in Waltham Cross, Hertfordshire is 6.295 ppb.
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