Chelmsford air quality now

Great Britain · The summary is refreshed every 15 minutes.

Now

No current value: fewer than four sensors at different places are reporting now.

Open map

Open methodology and data in JSON: Methodology and data sources · JSON

There are not enough fresh measurements for Chelmsford right now.

The weather data do not point to a clear reason for this level.

Weather now: cloudy, 9°C, wind 2 m/s, humidity 89%. By 02:00 the wind is expected to pick up to 4 m/s, which may clear the air. By 09:00 the temperature will be about 5°C.

Written automatically at 21:13 local time (21:13 UTC) from sensor measurements and the weather forecast. Values are approximate; hypotheses are marked.

2 m/s

Wind, N

3.1 mm

Precipitation today

Pollution accumulation index now

20/100Low · An estimate of weather conditions · not a PM2.5 forecast

Now2020
22.0006.0013.0021.00

Pollution accumulation forecast

Today — November 11

10°/8°

Index by time of day

44/100Moderate

  1. 44/100Night
  2. 35/100Morning
  3. 8/100Day
  4. 22/100Evening

Thursday — November 12

9°/3°

Index by time of day

38/100Moderate

  1. 38/100Night
  2. 35/100Morning
  3. 9/100Day
  4. 23/100Evening

Friday — November 13

7°/0°

Index by time of day

46/100Moderate

  1. 46/100Night
  2. 39/100Morning
  3. 10/100Day
  4. 27/100Evening

Saturday — November 14

8°/-1°

Index by time of day

53/100Moderate

  1. 53/100Night
  2. 36/100Morning
  3. 6/100Day
  4. 16/100Evening

Sunday — November 15

10°/2°

Index by time of day

45/100Moderate

  1. 45/100Night
  2. 34/100Morning
  3. 6/100Day
  4. 12/100Evening

Monday — November 16

10°/4°

Index by time of day

26/100Low

  1. 26/100Night
  2. 20/100Morning
  3. 6/100Day
  4. 23/100Evening

Forecast of conditions that trap pollution near the surface

Weather

9°

Cloudy. Feels like 7°C

  1. MorningRain8°C91%
  2. DayRain10°C75%
  3. EveningCloudy9°C89%

Wind

2m/sWind from the N

4m/sWind gusts

Wind force: 2

Gusts up to 7 m/s are expected.

10-day weather forecast for Chelmsford

Great Britain

  1. TodayNov 11Rain10°C8°C
  2. ThuNov 12Cloudy9°C3°C
  3. FriNov 13Clear7°C0°C
  4. SatNov 14Cloudy8°C-1°C
  5. SunNov 15Rain10°C2°C
  6. MonNov 16Rain10°C4°C
  7. TueNov 17Rain5°C2°C
  8. WedNov 18Rain9°C3°C
  9. ThuNov 19Cloudy8°C2°C
  10. FriNov 20Cloudy7°C1°C

Great Britain: sensors in total

49

  1. City of LondonGreat Britain

    15

  2. DundeeGreat Britain

    4

  3. Milton KeynesGreat Britain

    4

Cities with the most sensors

All sensors on the map, by city as the map assigns them; the city’s values count only the sensors that pass the Data Hub’s quality check.

Great Britain · City ranking · All pilot cities

Questions

What is the air quality in Chelmsford right now?

Fresh data for Chelmsford are insufficient (last update: 17:45 local time, 17:45 UTC). Open the map for the latest readings of individual sensors.

Where do these data come from?

From Atmy sensors and connected public networks (citizen, experimental and government monitors), aggregated by Atmy. Values are approximate; see the methodology.

How often is this page updated?

The summary is rebuilt every 15 minutes from the latest reading of each sensor, each no older than one hour.

Data

Where do these data come from?

The daily value is the Data Hub’s: the mean of the city’s sensors that passed the nightly quality check, each with at least 12 valid hours, and only with sensors at four places 500 m apart; days are UTC.

“Now” uses the same sensors and rule: the mean of their latest readings, each at most 60 minutes old, shown only with sensors at four places 500 m apart reporting.

Source: public Atmy monitoring data. Methodology and data sources · Data terms