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Air quality · Brazil

São Paulo Air Quality Index (AQI) today

Modelled estimate for 09:00 local time (UTC-3), refreshed 3 Nov, 07:52 UTC+0.

71 Moderate

Live estimate · modelled

US EPA AQI09:00 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 65.

Over the next 24 hours the model expects the AQI to range from 57 around 12:00 to 155 around 05:00 (4 Nov).

382nd most polluted of 849 cities worldwide right now, 5th of 25 in Brazil.

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

10:00 · 55 11:00 · 52 12:00 · 50 13:00 · 46 14:00 · 43 15:00 · 38 16:00 · 35 17:00 · 37 18:00 · 48 19:00 · 58 20:00 · 64 21:00 · 67 22:00 · 69 23:00 · 70 00:00 · 72 01:00 · 73 02:00 · 74 03:00 · 75 04:00 · 76 05:00 · 78 06:00 · 81 07:00 · 82 08:00 · 81 09:00 · 71 10:00 · 63 11:00 · 58 12:00 · 57 13:00 · 64 14:00 · 93 15:00 · 115 16:00 · 129 17:00 · 126 18:00 · 112 19:00 · 97 20:00 · 82 21:00 · 91 22:00 · 103 23:00 · 115 00:00 · 126 01:00 · 138 02:00 · 148 03:00 · 152 04:00 · 154 05:00 · 155 06:00 · 155 07:00 · 154 08:00 · 142 09:00 · 108 10:00 · 87 11:00 · 75 12:00 · 112 13:00 · 150 14:00 · 172 15:00 · 185 16:00 · 182 17:00 · 164 18:00 · 143 19:00 · 119 20:00 · 94 21:00 · 99 22:00 · 100 23:00 · 98 00:00 · 95 01:00 · 91 02:00 · 87 03:00 · 83 04:00 · 80 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 10:0055
Mon 11:0052
Mon 12:0050
Mon 13:0046
Mon 14:0043
Mon 15:0038
Mon 16:0035
Mon 17:0037
Mon 18:0048
Mon 19:0058
Mon 20:0064
Mon 21:0067
Mon 22:0069
Mon 23:0070
Tue 00:0072
Tue 01:0073
Tue 02:0074
Tue 03:0075
Tue 04:0076
Tue 05:0078
Tue 06:0081
Tue 07:0082
Tue 08:0081
Tue 09:00 · Now71
Tue 10:00 · Forecast63
Tue 11:00 · Forecast58
Tue 12:00 · Forecast57
Tue 13:00 · Forecast64
Tue 14:00 · Forecast93
Tue 15:00 · Forecast115
Tue 16:00 · Forecast129
Tue 17:00 · Forecast126
Tue 18:00 · Forecast112
Tue 19:00 · Forecast97
Tue 20:00 · Forecast82
Tue 21:00 · Forecast91
Tue 22:00 · Forecast103
Tue 23:00 · Forecast115
Wed 00:00 · Forecast126
Wed 01:00 · Forecast138
Wed 02:00 · Forecast148
Wed 03:00 · Forecast152
Wed 04:00 · Forecast154
Wed 05:00 · Forecast155
Wed 06:00 · Forecast155
Wed 07:00 · Forecast154
Wed 08:00 · Forecast142
Wed 09:00 · Forecast108
Wed 10:00 · Forecast87
Wed 11:00 · Forecast75
Wed 12:00 · Forecast112
Wed 13:00 · Forecast150
Wed 14:00 · Forecast172
Wed 15:00 · Forecast185
Wed 16:00 · Forecast182
Wed 17:00 · Forecast164
Wed 18:00 · Forecast143
Wed 19:00 · Forecast119
Wed 20:00 · Forecast94
Wed 21:00 · Forecast99
Wed 22:00 · Forecast100
Wed 23:00 · Forecast98
Thu 00:00 · Forecast95
Thu 01:00 · Forecast91
Thu 02:00 · Forecast87
Thu 03:00 · Forecast83
Thu 04:00 · Forecast80

Pollutants this hour

  • PM2.5 14.2 µg/m³ 24-hour mean 16.4 µg/m³ · 1.1× WHO’s 24-hour guideline (15) 71
  • PM10 14 µg/m³ 18
  • O₃ 131 µg/m³ 22
  • NO₂ 12 µg/m³ 6
  • SO₂ 9 µg/m³ 4
  • CO 0.38 mg/m³ 3

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
Campinas São Paulo 81
Sorocaba São Paulo 84
São José dos Campos São Paulo 52
Ribeirão Preto São Paulo 172
Nova Iguaçu Rio de Janeiro 58
Curitiba Paraná 57
Rio de Janeiro Rio de Janeiro 64

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 São Paulo’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 São Paulo right now?
71 on the US EPA scale (Moderate) at 09:00 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 São Paulo 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 São Paulo get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 57 around 12:00 to 155 around 05:00 (4 Nov). Forecasts beyond a day are less certain.

How does São Paulo compare with other cities?
Right now it is the 382nd most polluted of 849 cities we track worldwide, and 5th of 25 in Brazil, all on the same US EPA scale.

Why does another app show a different AQI for São Paulo?
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.