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Air quality · Harjumaa, Estonia

Tallinn Air Quality Index (AQI) today

Modelled estimate for 14:00 local time (UTC+2), refreshed 3 Nov, 07:52 UTC+0.

31 Good

Live estimate · modelled

US EPA AQI14:00 UTC+2, 3 Nov Main pollutant: O₃

Air quality is satisfactory, and air pollution poses little or no risk.

This page uses EPA’s NowCast, which follows the last few hours, as the US government’s AirNow does. On a 24-hour average of particles, as many apps show, it is 20.

Over the next 24 hours the model expects the AQI to range from 26 around 10:00 to 32 around 17:00 (3 Nov).

775th most polluted of 849 cities worldwide right now.

What to do today

  • Long walk or run outside OK
  • Kids playing outside OK
  • Airing the house Open
  • Mask outdoors Not needed

Based on the US EPA’s health statement: “Air quality is satisfactory, and air pollution poses little or no risk.” General guidance, not medical advice.

Last 24 hours and next 48

Past hours Forecast

15:00 · 22 16:00 · 22 17:00 · 25 18:00 · 31 19:00 · 38 20:00 · 39 21:00 · 38 22:00 · 36 23:00 · 32 00:00 · 26 01:00 · 20 02:00 · 18 03:00 · 19 04:00 · 20 05:00 · 21 06:00 · 23 07:00 · 24 08:00 · 25 09:00 · 26 10:00 · 27 11:00 · 28 12:00 · 29 13:00 · 30 14:00 · 31 15:00 · 31 16:00 · 31 17:00 · 32 18:00 · 32 19:00 · 32 20:00 · 32 21:00 · 31 22:00 · 31 23:00 · 31 00:00 · 31 01:00 · 31 02:00 · 31 03:00 · 31 04:00 · 30 05:00 · 30 06:00 · 30 07:00 · 29 08:00 · 28 09:00 · 27 10:00 · 26 11:00 · 26 12:00 · 26 13:00 · 26 14:00 · 27 15:00 · 28 16:00 · 29 17:00 · 31 18:00 · 31 19:00 · 32 20:00 · 34 21:00 · 35 22:00 · 35 23:00 · 36 00:00 · 36 01:00 · 36 02:00 · 36 03:00 · 36 04:00 · 36 05:00 · 35 06:00 · 35 07:00 · 35 08:00 · 35 09:00 · 34 Now

US EPA AQI per hour, UTC+2. Particles use EPA’s NowCast (a 12-hour weighted average), ozone and CO an 8-hour average. Lighter bars are the CAMS forecast.

Show as a table
TimeAQI
Mon 15:0022
Mon 16:0022
Mon 17:0025
Mon 18:0031
Mon 19:0038
Mon 20:0039
Mon 21:0038
Mon 22:0036
Mon 23:0032
Tue 00:0026
Tue 01:0020
Tue 02:0018
Tue 03:0019
Tue 04:0020
Tue 05:0021
Tue 06:0023
Tue 07:0024
Tue 08:0025
Tue 09:0026
Tue 10:0027
Tue 11:0028
Tue 12:0029
Tue 13:0030
Tue 14:00 · Now31
Tue 15:00 · Forecast31
Tue 16:00 · Forecast31
Tue 17:00 · Forecast32
Tue 18:00 · Forecast32
Tue 19:00 · Forecast32
Tue 20:00 · Forecast32
Tue 21:00 · Forecast31
Tue 22:00 · Forecast31
Tue 23:00 · Forecast31
Wed 00:00 · Forecast31
Wed 01:00 · Forecast31
Wed 02:00 · Forecast31
Wed 03:00 · Forecast31
Wed 04:00 · Forecast30
Wed 05:00 · Forecast30
Wed 06:00 · Forecast30
Wed 07:00 · Forecast29
Wed 08:00 · Forecast28
Wed 09:00 · Forecast27
Wed 10:00 · Forecast26
Wed 11:00 · Forecast26
Wed 12:00 · Forecast26
Wed 13:00 · Forecast26
Wed 14:00 · Forecast27
Wed 15:00 · Forecast28
Wed 16:00 · Forecast29
Wed 17:00 · Forecast31
Wed 18:00 · Forecast31
Wed 19:00 · Forecast32
Wed 20:00 · Forecast34
Wed 21:00 · Forecast35
Wed 22:00 · Forecast35
Wed 23:00 · Forecast36
Thu 00:00 · Forecast36
Thu 01:00 · Forecast36
Thu 02:00 · Forecast36
Thu 03:00 · Forecast36
Thu 04:00 · Forecast36
Thu 05:00 · Forecast35
Thu 06:00 · Forecast35
Thu 07:00 · Forecast35
Thu 08:00 · Forecast35
Thu 09:00 · Forecast34

Pollutants this hour

  • PM2.5 2.4 µg/m³ 24-hour mean 3.6 µg/m³ · within WHO’s 24-hour guideline (15) 12
  • PM10 5 µg/m³ 4
  • O₃ 71 µg/m³ 31
  • NO₂ 3 µg/m³ 1
  • SO₂ 0 µg/m³ 0
  • CO 0.16 mg/m³ 1

Modelled concentrations at the city’s location (CAMS). The sub-index uses the same averaging as the headline, so the highest one is the AQI.

Nearby cities

City AQI
Helsinki Finland 27
Riga Latvia 23
Saint Petersburg Russia 39
Stockholm Sweden 21
Vilnius Lithuania 28
Minsk Belarus 49
Gothenburg Sweden 23

Where this number comes from

The Copernicus Atmosphere Monitoring Service (CAMS) forecasts air pollution worldwide on a grid (about 11 km over Europe, about 45 km elsewhere). We take the grid value at Tallinn’s coordinates and score it with the US EPA’s method. It is a model, not a measurement: a nearby monitoring station can read quite differently, especially next to busy roads or during fires and dust storms.

Full methodology · Data: CAMS via Open-Meteo (CC BY 4.0); city list: GeoNames (CC BY 4.0).

  • Good 0–50
  • Moderate 51–100
  • Unhealthy for sensitive groups 101–150
  • Unhealthy 151–200
  • Very unhealthy 201–300
  • Hazardous 301–500

Questions

What is the AQI in Tallinn right now?
31 on the US EPA scale (Good) at 14:00 UTC+2, 3 Nov. O₃ is the pollutant with the highest sub-index. This is a modelled estimate from the Copernicus Atmosphere Monitoring Service (CAMS), not a reading from a monitoring station.

Is it safe to exercise outside in Tallinn today?
For most people, yes. The EPA’s statement for “Good”: Air quality is satisfactory, and air pollution poses little or no risk. General guidance, not medical advice.

Will the air in Tallinn get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 26 around 10:00 to 32 around 17:00 (3 Nov). Forecasts beyond a day are less certain.

How does Tallinn compare with other cities?
Right now it is the 775th most polluted of 849 cities we track worldwide, all on the same US EPA scale.

Why does another app show a different AQI for Tallinn?
Apps differ in source (government stations, low-cost sensors or a model like this one), in scale (US EPA, European, or a national index) and in averaging (hourly or NowCast, 8-hour, 24-hour). This page uses the US EPA AQI with EPA’s NowCast for particles, computed from the CAMS forecast for the city’s location.