Test Valley 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 Test Valley right now. From 09:00 to 20:00 local time the city mean PM2.5 stayed roughly level: from 21.0 to 24.0 µg/m³. The highest hour was 15:00 with 50.7 µg/m³.

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

Weather now: cloudy, 8°C, wind 3 m/s, humidity 92%. No major change in the wind is expected in the coming hours. 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.

3 m/s

Wind, NE

4 mm

Precipitation today

Pollution accumulation index now

18/100Low · An estimate of weather conditions · not a PM2.5 forecast

Now1822
22.0006.0013.0021.00

Pollution accumulation forecast

Today — November 11

9°/7°

Index by time of day

40/100Moderate

  1. 40/100Night
  2. 33/100Morning
  3. 7/100Day
  4. 21/100Evening

Thursday — November 12

7°/2°

Index by time of day

33/100Low

  1. 33/100Night
  2. 31/100Morning
  3. 10/100Day
  4. 25/100Evening

Friday — November 13

6°/-2°

Index by time of day

52/100Moderate

  1. 52/100Night
  2. 39/100Morning
  3. 10/100Day
  4. 28/100Evening

Saturday — November 14

8°/-3°

Index by time of day

55/100Moderate

  1. 55/100Night
  2. 36/100Morning
  3. 7/100Day
  4. 15/100Evening

Sunday — November 15

10°/4°

Index by time of day

46/100Moderate

  1. 46/100Night
  2. 35/100Morning
  3. 5/100Day
  4. 16/100Evening

Monday — November 16

9°/4°

Index by time of day

29/100Low

  1. 29/100Night
  2. 23/100Morning
  3. 6/100Day
  4. 24/100Evening

Forecast of conditions that trap pollution near the surface

Weather

8°

Cloudy. Feels like 6°C

  1. MorningCloudy8°C94%
  2. DayCloudy9°C87%
  3. EveningCloudy8°C92%

Wind

3m/sWind from the NE

6m/sWind gusts

Wind force: 2

Gusts up to 6 m/s are expected.

10-day weather forecast for Test Valley

Great Britain

  1. TodayNov 11Rain9°C7°C
  2. ThuNov 12Cloudy7°C2°C
  3. FriNov 13Partly cloudy6°C-2°C
  4. SatNov 14Cloudy8°C-3°C
  5. SunNov 15Rain10°C4°C
  6. MonNov 16Rain9°C4°C
  7. TueNov 17Rain5°C4°C
  8. WedNov 18Cloudy10°C3°C
  9. ThuNov 19Cloudy8°C2°C
  10. FriNov 20Partly cloudy8°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.

Air quality calendar: Test Valley

Daily mean PM2.5 of the city sensors, µg/m³

Click a day to see its date and value.

LowModerateElevatedHighVery highExtremely high

Great Britain · City ranking · All pilot cities

Questions

What is the air quality in Test Valley right now?

Fresh data for Test Valley are insufficient (last update: 21:30 local time, 21:30 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