Alkmaar air quality now

Netherlands · 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 Alkmaar right now.

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

Weather now: cloudy, 4°C, wind 1 m/s, humidity 83%. By 10:00 the wind is expected to pick up to 4 m/s, which may clear the air. By 10:00 the temperature will be about 9°C.

Written automatically at 22:13 local time (21:13 UTC) from sensor measurements and the weather forecast. Values are approximate; hypotheses are marked.

1 m/s

Wind, SE

0 mm

Precipitation today

Pollution accumulation index now

29/100Low · An estimate of weather conditions · not a PM2.5 forecast

Now2913
23.0007.0014.0022.00

Pollution accumulation forecast

Today — November 11

5°/3°

Index by time of day

33/100Low

  1. 31/100Night
  2. 33/100Morning
  3. 8/100Day
  4. 29/100Evening

Thursday — November 12

10°/3°

Index by time of day

53/100Moderate

  1. 53/100Night
  2. 42/100Morning
  3. 7/100Day
  4. 18/100Evening

Friday — November 13

10°/7°

Index by time of day

33/100Low

  1. 33/100Night
  2. 21/100Morning
  3. 6/100Day
  4. 26/100Evening

Saturday — November 14

9°/3°

Index by time of day

33/100Low

  1. 33/100Night
  2. 30/100Morning
  3. 8/100Day
  4. 24/100Evening

Sunday — November 15

11°/2°

Index by time of day

38/100Moderate

  1. 38/100Night
  2. 27/100Morning
  3. 5/100Day
  4. 10/100Evening

Monday — November 16

11°/9°

Index by time of day

26/100Low

  1. 24/100Night
  2. 26/100Morning
  3. 7/100Day
  4. 18/100Evening

Forecast of conditions that trap pollution near the surface

Weather

4°

Cloudy. Feels like 2°C

  1. MorningCloudy4°C92%
  2. DayCloudy5°C83%
  3. EveningCloudy4°C84%

Wind

1m/sWind from the SE

2m/sWind gusts

Wind force: 1

Light wind is expected over the next few hours.

10-day weather forecast for Alkmaar

Netherlands

  1. TodayNov 11Cloudy5°C3°C
  2. ThuNov 12Rain10°C3°C
  3. FriNov 13Cloudy10°C7°C
  4. SatNov 14Cloudy9°C3°C
  5. SunNov 15Rain11°C2°C
  6. MonNov 16Rain11°C9°C
  7. TueNov 17Rain9°C6°C
  8. WedNov 18Rain11°C8°C
  9. ThuNov 19Rain9°C6°C
  10. FriNov 20Rain8°C6°C

Netherlands: sensors in total

688

  1. AmersfoortNetherlands

    88

  2. EindhovenNetherlands

    86

  3. GroningenNetherlands

    78

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: Alkmaar

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

Click a day to see its date and value.

LowModerateElevatedHighVery highExtremely high

Netherlands · City ranking · All pilot cities

Questions

What is the air quality in Alkmaar right now?

Fresh data for Alkmaar are insufficient (last update: 00:45 local time, 23:45 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