Air Quality in Chelmsford, United Kingdom
Windy
12.8°C · 61.5% humidity
12.8°
Feels 12.8°
21
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
AQI Forecast
Calibrated
10
12am
10
10
21
3am
18
16
14
6am
13
2
1
9am
1
1
1
12pm
0
0
0
3pm
0
0
0
6pm
0
0
0
9pm
0
0
Station readings
4
4
5
CAMS model
adj -44
54
54
54
54
54
54
54
54
34
27
27
27
27
27
34
27
27
27
25
25
25
25
25
25
Air Quality Index Trend
30h · 1 stnChelmsford's air quality is shaped by traffic emissions and residential heating. Pollution levels tend to peak during winter months when cold air traps emissions close to ground level.
61.5%
Humidity
44.6 km/h
Wind NE
1015.6 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
5.0 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Chelmsford?
Temperature & Precipitation
PM2.5 Trend
30h · 1 stationPM2.55.0 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
Station readings (1 station within 25 km)
5.0
Median
5.0
Average
5.0
Low
5.0
High
PM2.5 µg/m³ · Model: 10.0 · Bias: +5.0
Both models agree
Avg diff: 2.8°C
Where are air quality stations near Chelmsford?
21
Stanford-le-Hope Roadside, United Kingdom
40
Stanford-le-Hope Roadside, United Kingdom
147
Stanford-le-Hope Roadside, United Kingdom
5
united-kingdom-bishops-stortford-edens-close
30
Southend-on-Sea, United Kingdom
33
Southend-on-Sea, United Kingdom
What cities are near Chelmsford?
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-22T02:16 UTC.