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Air quality · Ohio, United States

Columbus Air Quality Index (AQI) today

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

27 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 40 around 18:00 (3 Nov).

795th most polluted of 849 cities worldwide right now, 17th 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 · 33 10:00 · 34 11:00 · 34 12:00 · 34 13:00 · 33 14:00 · 32 15:00 · 32 16:00 · 31 17:00 · 31 18:00 · 31 19:00 · 31 20:00 · 31 21:00 · 30 22:00 · 30 23:00 · 29 00:00 · 29 01:00 · 29 02:00 · 28 03:00 · 27 04:00 · 27 05:00 · 27 06:00 · 27 07:00 · 27 08:00 · 28 09:00 · 29 10:00 · 30 11:00 · 32 12:00 · 33 13:00 · 34 14:00 · 34 15:00 · 35 16:00 · 37 17:00 · 39 18:00 · 40 19:00 · 40 20:00 · 38 21:00 · 37 22:00 · 37 23:00 · 37 00:00 · 36 01:00 · 33 02:00 · 32 03:00 · 30 04:00 · 29 05:00 · 29 06:00 · 28 07:00 · 28 08:00 · 28 09:00 · 28 10:00 · 31 11:00 · 32 12:00 · 33 13:00 · 32 14:00 · 32 15:00 · 33 16:00 · 34 17:00 · 34 18:00 · 35 19:00 · 35 20:00 · 34 21:00 · 34 22:00 · 33 23:00 · 32 00:00 · 31 01:00 · 31 02:00 · 30 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 09:0033
Mon 10:0034
Mon 11:0034
Mon 12:0034
Mon 13:0033
Mon 14:0032
Mon 15:0032
Mon 16:0031
Mon 17:0031
Mon 18:0031
Mon 19:0031
Mon 20:0031
Mon 21:0030
Mon 22:0030
Mon 23:0029
Tue 00:0029
Tue 01:0029
Tue 02:0028
Tue 03:0027
Tue 04:0027
Tue 05:0027
Tue 06:0027
Tue 07:00 · Now27
Tue 08:00 · Forecast28
Tue 09:00 · Forecast29
Tue 10:00 · Forecast30
Tue 11:00 · Forecast32
Tue 12:00 · Forecast33
Tue 13:00 · Forecast34
Tue 14:00 · Forecast34
Tue 15:00 · Forecast35
Tue 16:00 · Forecast37
Tue 17:00 · Forecast39
Tue 18:00 · Forecast40
Tue 19:00 · Forecast40
Tue 20:00 · Forecast38
Tue 21:00 · Forecast37
Tue 22:00 · Forecast37
Tue 23:00 · Forecast37
Wed 00:00 · Forecast36
Wed 01:00 · Forecast33
Wed 02:00 · Forecast32
Wed 03:00 · Forecast30
Wed 04:00 · Forecast29
Wed 05:00 · Forecast29
Wed 06:00 · Forecast28
Wed 07:00 · Forecast28
Wed 08:00 · Forecast28
Wed 09:00 · Forecast28
Wed 10:00 · Forecast31
Wed 11:00 · Forecast32
Wed 12:00 · Forecast33
Wed 13:00 · Forecast32
Wed 14:00 · Forecast32
Wed 15:00 · Forecast33
Wed 16:00 · Forecast34
Wed 17:00 · Forecast34
Wed 18:00 · Forecast35
Wed 19:00 · Forecast35
Wed 20:00 · Forecast34
Wed 21:00 · Forecast34
Wed 22:00 · Forecast33
Wed 23:00 · Forecast32
Thu 00:00 · Forecast31
Thu 01:00 · Forecast31
Thu 02:00 · Forecast30

Pollutants this hour

  • PM2.5 5.2 µg/m³ 24-hour mean 5.4 µg/m³ · within WHO’s 24-hour guideline (15) 27
  • PM10 6 µg/m³ 5
  • O₃ 46 µg/m³ 24
  • NO₂ 10 µg/m³ 5
  • SO₂ 1 µg/m³ 0
  • CO 0.20 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
Indianapolis Indiana 26
Chicago Illinois 37
Mississauga Canada 34
Toronto Canada 36
Washington District of Columbia 61
Nashville Tennessee 42
Charlotte North Carolina 47

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 Columbus’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 Columbus right now?
27 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 Columbus 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 Columbus get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 28 around 08:00 to 40 around 18:00 (3 Nov). Forecasts beyond a day are less certain.

How does Columbus compare with other cities?
Right now it is the 795th most polluted of 849 cities we track worldwide, and 17th of 25 in United States, all on the same US EPA scale.

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