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Air quality · Paraná, Brazil

Curitiba Air Quality Index (AQI) today

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

57 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 50.

Over the next 24 hours the model expects the AQI to range from 26 around 00:00 to 77 around 16:00 (3 Nov).

530th most polluted of 849 cities worldwide right now, 8th 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 · 27 11:00 · 30 12:00 · 31 13:00 · 33 14:00 · 35 15:00 · 37 16:00 · 37 17:00 · 36 18:00 · 35 19:00 · 39 20:00 · 47 21:00 · 51 22:00 · 53 23:00 · 53 00:00 · 54 01:00 · 54 02:00 · 55 03:00 · 55 04:00 · 57 05:00 · 60 06:00 · 63 07:00 · 63 08:00 · 62 09:00 · 57 10:00 · 52 11:00 · 47 12:00 · 44 13:00 · 46 14:00 · 58 15:00 · 74 16:00 · 77 17:00 · 74 18:00 · 64 19:00 · 50 20:00 · 45 21:00 · 40 22:00 · 35 23:00 · 30 00:00 · 26 01:00 · 29 02:00 · 36 03:00 · 43 04:00 · 49 05:00 · 52 06:00 · 52 07:00 · 52 08:00 · 53 09:00 · 52 10:00 · 51 11:00 · 48 12:00 · 46 13:00 · 42 14:00 · 44 15:00 · 46 16:00 · 46 17:00 · 44 18:00 · 43 19:00 · 51 20:00 · 53 21:00 · 46 22:00 · 46 23:00 · 49 00:00 · 51 01:00 · 51 02:00 · 47 03:00 · 43 04:00 · 41 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 10:0027
Mon 11:0030
Mon 12:0031
Mon 13:0033
Mon 14:0035
Mon 15:0037
Mon 16:0037
Mon 17:0036
Mon 18:0035
Mon 19:0039
Mon 20:0047
Mon 21:0051
Mon 22:0053
Mon 23:0053
Tue 00:0054
Tue 01:0054
Tue 02:0055
Tue 03:0055
Tue 04:0057
Tue 05:0060
Tue 06:0063
Tue 07:0063
Tue 08:0062
Tue 09:00 · Now57
Tue 10:00 · Forecast52
Tue 11:00 · Forecast47
Tue 12:00 · Forecast44
Tue 13:00 · Forecast46
Tue 14:00 · Forecast58
Tue 15:00 · Forecast74
Tue 16:00 · Forecast77
Tue 17:00 · Forecast74
Tue 18:00 · Forecast64
Tue 19:00 · Forecast50
Tue 20:00 · Forecast45
Tue 21:00 · Forecast40
Tue 22:00 · Forecast35
Tue 23:00 · Forecast30
Wed 00:00 · Forecast26
Wed 01:00 · Forecast29
Wed 02:00 · Forecast36
Wed 03:00 · Forecast43
Wed 04:00 · Forecast49
Wed 05:00 · Forecast52
Wed 06:00 · Forecast52
Wed 07:00 · Forecast52
Wed 08:00 · Forecast53
Wed 09:00 · Forecast52
Wed 10:00 · Forecast51
Wed 11:00 · Forecast48
Wed 12:00 · Forecast46
Wed 13:00 · Forecast42
Wed 14:00 · Forecast44
Wed 15:00 · Forecast46
Wed 16:00 · Forecast46
Wed 17:00 · Forecast44
Wed 18:00 · Forecast43
Wed 19:00 · Forecast51
Wed 20:00 · Forecast53
Wed 21:00 · Forecast46
Wed 22:00 · Forecast46
Wed 23:00 · Forecast49
Thu 00:00 · Forecast51
Thu 01:00 · Forecast51
Thu 02:00 · Forecast47
Thu 03:00 · Forecast43
Thu 04:00 · Forecast41

Pollutants this hour

  • PM2.5 9.1 µg/m³ 24-hour mean 9.0 µg/m³ · within WHO’s 24-hour guideline (15) 57
  • PM10 9 µg/m³ 11
  • O₃ 109 µg/m³ 19
  • NO₂ 7 µg/m³ 3
  • SO₂ 7 µg/m³ 3
  • CO 0.44 mg/m³ 2

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
Sorocaba São Paulo 84
São Paulo São Paulo 71
Campinas São Paulo 81
São José dos Campos São Paulo 52
Ribeirão Preto São Paulo 172
Porto Alegre Rio Grande do Sul 51
Nova Iguaçu Rio de Janeiro 58

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 Curitiba’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 Curitiba right now?
57 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 Curitiba 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 Curitiba get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 26 around 00:00 to 77 around 16:00 (3 Nov). Forecasts beyond a day are less certain.

How does Curitiba compare with other cities?
Right now it is the 530th most polluted of 849 cities we track worldwide, and 8th of 25 in Brazil, all on the same US EPA scale.

Why does another app show a different AQI for Curitiba?
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.