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Air quality · Indiana, United States

Indianapolis Air Quality Index (AQI) today

Modelled estimate for 07:00 local time (UTC-5), refreshed 3 Nov, 07:52 UTC+0.

26 Good

Live estimate · modelled

US EPA AQI07:00 UTC-5, 3 Nov Main pollutant: PM2.5

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 30.

Over the next 24 hours the model expects the AQI to range from 28 around 08:00 to 39 around 12:00 (3 Nov).

808th most polluted of 849 cities worldwide right now, 21st of 25 in United States.

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

08:00 · 31 09:00 · 30 10:00 · 28 11:00 · 27 12:00 · 27 13:00 · 28 14:00 · 28 15:00 · 28 16:00 · 30 17:00 · 33 18:00 · 34 19:00 · 36 20:00 · 36 21:00 · 37 22:00 · 36 23:00 · 35 00:00 · 33 01:00 · 31 02:00 · 28 03:00 · 26 04:00 · 25 05:00 · 25 06:00 · 26 07:00 · 26 08:00 · 28 09:00 · 32 10:00 · 35 11:00 · 37 12:00 · 39 13:00 · 39 14:00 · 39 15:00 · 37 16:00 · 34 17:00 · 36 18:00 · 36 19:00 · 37 20:00 · 36 21:00 · 36 22:00 · 35 23:00 · 33 00:00 · 32 01:00 · 31 02:00 · 31 03:00 · 31 04:00 · 31 05:00 · 31 06:00 · 31 07:00 · 31 08:00 · 31 09:00 · 31 10:00 · 31 11:00 · 31 12:00 · 31 13:00 · 30 14:00 · 30 15:00 · 29 16:00 · 28 17:00 · 27 18:00 · 26 19:00 · 25 20:00 · 24 21:00 · 23 22:00 · 22 23:00 · 21 00:00 · 20 01:00 · 19 02:00 · 19 Now

US EPA AQI per hour, UTC-5. 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 08:0031
Mon 09:0030
Mon 10:0028
Mon 11:0027
Mon 12:0027
Mon 13:0028
Mon 14:0028
Mon 15:0028
Mon 16:0030
Mon 17:0033
Mon 18:0034
Mon 19:0036
Mon 20:0036
Mon 21:0037
Mon 22:0036
Mon 23:0035
Tue 00:0033
Tue 01:0031
Tue 02:0028
Tue 03:0026
Tue 04:0025
Tue 05:0025
Tue 06:0026
Tue 07:00 · Now26
Tue 08:00 · Forecast28
Tue 09:00 · Forecast32
Tue 10:00 · Forecast35
Tue 11:00 · Forecast37
Tue 12:00 · Forecast39
Tue 13:00 · Forecast39
Tue 14:00 · Forecast39
Tue 15:00 · Forecast37
Tue 16:00 · Forecast34
Tue 17:00 · Forecast36
Tue 18:00 · Forecast36
Tue 19:00 · Forecast37
Tue 20:00 · Forecast36
Tue 21:00 · Forecast36
Tue 22:00 · Forecast35
Tue 23:00 · Forecast33
Wed 00:00 · Forecast32
Wed 01:00 · Forecast31
Wed 02:00 · Forecast31
Wed 03:00 · Forecast31
Wed 04:00 · Forecast31
Wed 05:00 · Forecast31
Wed 06:00 · Forecast31
Wed 07:00 · Forecast31
Wed 08:00 · Forecast31
Wed 09:00 · Forecast31
Wed 10:00 · Forecast31
Wed 11:00 · Forecast31
Wed 12:00 · Forecast31
Wed 13:00 · Forecast30
Wed 14:00 · Forecast30
Wed 15:00 · Forecast29
Wed 16:00 · Forecast28
Wed 17:00 · Forecast27
Wed 18:00 · Forecast26
Wed 19:00 · Forecast25
Wed 20:00 · Forecast24
Wed 21:00 · Forecast23
Wed 22:00 · Forecast22
Wed 23:00 · Forecast21
Thu 00:00 · Forecast20
Thu 01:00 · Forecast19
Thu 02:00 · Forecast19

Pollutants this hour

  • PM2.5 5.0 µg/m³ 24-hour mean 5.5 µg/m³ · within WHO’s 24-hour guideline (15) 26
  • PM10 6 µg/m³ 5
  • O₃ 62 µg/m³ 26
  • NO₂ 5 µg/m³ 2
  • SO₂ 1 µg/m³ 0
  • CO 0.15 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
Chicago Illinois 37
Columbus Ohio 27
Nashville Tennessee 42
Mississauga Canada 34
Charlotte North Carolina 47
Toronto Canada 36
Washington District of Columbia 61

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 Indianapolis’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 Indianapolis right now?
26 on the US EPA scale (Good) at 07:00 UTC-5, 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 Indianapolis 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 Indianapolis get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 28 around 08:00 to 39 around 12:00 (3 Nov). Forecasts beyond a day are less certain.

How does Indianapolis compare with other cities?
Right now it is the 808th most polluted of 849 cities we track worldwide, and 21st of 25 in United States, all on the same US EPA scale.

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