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Air quality · Buenos Aires F.D., Argentina

Buenos Aires Air Quality Index (AQI) today

Modelled estimate for 10:00 local time (UTC-3), refreshed 3 Nov, 07:52 UTC+0.

56 Moderate

Live estimate · modelled

US EPA AQI10:00 UTC-3, 3 Nov Main pollutant: PM2.5

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

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 57.

Over the next 24 hours the model expects the AQI to range from 32 around 05:00 to 53 around 17:00 (3 Nov).

553rd most polluted of 849 cities worldwide right now, 2nd of 3 in Argentina.

What to do today

  • Long walk or run outside OK, lighter if very sensitive
  • Kids playing outside OK
  • Airing the house Open
  • Mask outdoors Not needed

Based on the US EPA’s health statement: “Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.” General guidance, not medical advice.

Last 24 hours and next 48

Past hours Forecast

11:00 · 35 12:00 · 31 13:00 · 34 14:00 · 37 15:00 · 39 16:00 · 41 17:00 · 42 18:00 · 41 19:00 · 39 20:00 · 45 21:00 · 52 22:00 · 56 23:00 · 61 00:00 · 64 01:00 · 68 02:00 · 71 03:00 · 73 04:00 · 73 05:00 · 72 06:00 · 72 07:00 · 70 08:00 · 68 09:00 · 64 10:00 · 56 11:00 · 51 12:00 · 46 13:00 · 44 14:00 · 44 15:00 · 46 16:00 · 52 17:00 · 53 18:00 · 53 19:00 · 52 20:00 · 49 21:00 · 44 22:00 · 40 23:00 · 38 00:00 · 38 01:00 · 38 02:00 · 37 03:00 · 36 04:00 · 34 05:00 · 32 06:00 · 32 07:00 · 34 08:00 · 36 09:00 · 36 10:00 · 36 11:00 · 36 12:00 · 35 13:00 · 32 14:00 · 29 15:00 · 31 16:00 · 35 17:00 · 37 18:00 · 37 19:00 · 36 20:00 · 33 21:00 · 30 22:00 · 26 23:00 · 28 00:00 · 31 01:00 · 31 02:00 · 28 03:00 · 25 04:00 · 22 Now

US EPA AQI per hour, UTC-3. 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 11:0035
Mon 12:0031
Mon 13:0034
Mon 14:0037
Mon 15:0039
Mon 16:0041
Mon 17:0042
Mon 18:0041
Mon 19:0039
Mon 20:0045
Mon 21:0052
Mon 22:0056
Mon 23:0061
Tue 00:0064
Tue 01:0068
Tue 02:0071
Tue 03:0073
Tue 04:0073
Tue 05:0072
Tue 06:0072
Tue 07:0070
Tue 08:0068
Tue 09:0064
Tue 10:00 · Now56
Tue 11:00 · Forecast51
Tue 12:00 · Forecast46
Tue 13:00 · Forecast44
Tue 14:00 · Forecast44
Tue 15:00 · Forecast46
Tue 16:00 · Forecast52
Tue 17:00 · Forecast53
Tue 18:00 · Forecast53
Tue 19:00 · Forecast52
Tue 20:00 · Forecast49
Tue 21:00 · Forecast44
Tue 22:00 · Forecast40
Tue 23:00 · Forecast38
Wed 00:00 · Forecast38
Wed 01:00 · Forecast38
Wed 02:00 · Forecast37
Wed 03:00 · Forecast36
Wed 04:00 · Forecast34
Wed 05:00 · Forecast32
Wed 06:00 · Forecast32
Wed 07:00 · Forecast34
Wed 08:00 · Forecast36
Wed 09:00 · Forecast36
Wed 10:00 · Forecast36
Wed 11:00 · Forecast36
Wed 12:00 · Forecast35
Wed 13:00 · Forecast32
Wed 14:00 · Forecast29
Wed 15:00 · Forecast31
Wed 16:00 · Forecast35
Wed 17:00 · Forecast37
Wed 18:00 · Forecast37
Wed 19:00 · Forecast36
Wed 20:00 · Forecast33
Wed 21:00 · Forecast30
Wed 22:00 · Forecast26
Wed 23:00 · Forecast28
Thu 00:00 · Forecast31
Thu 01:00 · Forecast31
Thu 02:00 · Forecast28
Thu 03:00 · Forecast25
Thu 04:00 · Forecast22

Pollutants this hour

  • PM2.5 7.7 µg/m³ 24-hour mean 12.1 µg/m³ · within WHO’s 24-hour guideline (15) 56
  • PM10 8 µg/m³ 11
  • O₃ 58 µg/m³ 21
  • NO₂ 12 µg/m³ 6
  • SO₂ 7 µg/m³ 3
  • CO 0.21 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
Montevideo Uruguay 37
Rosario Santa Fe 36
Córdoba Cordoba 71
Porto Alegre Brazil 49
Asunción Paraguay 21
Santiago Chile 77
Curitiba Brazil 52

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 Buenos Aires’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 Buenos Aires right now?
56 on the US EPA scale (Moderate) at 10:00 UTC-3, 3 Nov. PM2.5 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 Buenos Aires today?
For most people, yes. The EPA’s statement for “Moderate”: Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. General guidance, not medical advice.

Will the air in Buenos Aires get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 32 around 05:00 to 53 around 17:00 (3 Nov). Forecasts beyond a day are less certain.

How does Buenos Aires compare with other cities?
Right now it is the 553rd most polluted of 849 cities we track worldwide, and 2nd of 3 in Argentina, all on the same US EPA scale.

Why does another app show a different AQI for Buenos Aires?
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.