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Air quality · Gauteng, South Africa

Benoni Air Quality Index (AQI) today

Modelled estimate for 15:00 local time (UTC+2), refreshed 3 Nov, 07:52 UTC+0.

97 Moderate

Live estimate · modelled

US EPA AQI15:00 UTC+2, 3 Nov Main pollutant: O₃

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 63.

Over the next 24 hours the model expects the AQI to range from 59 around 03:00 to 101 around 15:00 (4 Nov).

211th most polluted of 849 cities worldwide right now, 1st of 9 in South Africa.

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

16:00 · 67 17:00 · 64 18:00 · 58 19:00 · 57 20:00 · 64 21:00 · 65 22:00 · 63 23:00 · 62 00:00 · 63 01:00 · 63 02:00 · 65 03:00 · 67 04:00 · 70 05:00 · 73 06:00 · 74 07:00 · 73 08:00 · 69 09:00 · 68 10:00 · 66 11:00 · 65 12:00 · 64 13:00 · 71 14:00 · 87 15:00 · 97 16:00 · 97 17:00 · 93 18:00 · 80 19:00 · 66 20:00 · 74 21:00 · 79 22:00 · 78 23:00 · 71 00:00 · 66 01:00 · 62 02:00 · 60 03:00 · 59 04:00 · 59 05:00 · 60 06:00 · 64 07:00 · 67 08:00 · 69 09:00 · 69 10:00 · 69 11:00 · 68 12:00 · 68 13:00 · 74 14:00 · 87 15:00 · 101 16:00 · 115 17:00 · 122 18:00 · 122 19:00 · 108 20:00 · 93 21:00 · 92 22:00 · 88 23:00 · 80 00:00 · 75 01:00 · 74 02:00 · 74 03:00 · 71 04:00 · 68 05:00 · 66 06:00 · 65 07:00 · 65 08:00 · 65 09:00 · 64 Now

US EPA AQI per hour, UTC+2. 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 16:0067
Mon 17:0064
Mon 18:0058
Mon 19:0057
Mon 20:0064
Mon 21:0065
Mon 22:0063
Mon 23:0062
Tue 00:0063
Tue 01:0063
Tue 02:0065
Tue 03:0067
Tue 04:0070
Tue 05:0073
Tue 06:0074
Tue 07:0073
Tue 08:0069
Tue 09:0068
Tue 10:0066
Tue 11:0065
Tue 12:0064
Tue 13:0071
Tue 14:0087
Tue 15:00 · Now97
Tue 16:00 · Forecast97
Tue 17:00 · Forecast93
Tue 18:00 · Forecast80
Tue 19:00 · Forecast66
Tue 20:00 · Forecast74
Tue 21:00 · Forecast79
Tue 22:00 · Forecast78
Tue 23:00 · Forecast71
Wed 00:00 · Forecast66
Wed 01:00 · Forecast62
Wed 02:00 · Forecast60
Wed 03:00 · Forecast59
Wed 04:00 · Forecast59
Wed 05:00 · Forecast60
Wed 06:00 · Forecast64
Wed 07:00 · Forecast67
Wed 08:00 · Forecast69
Wed 09:00 · Forecast69
Wed 10:00 · Forecast69
Wed 11:00 · Forecast68
Wed 12:00 · Forecast68
Wed 13:00 · Forecast74
Wed 14:00 · Forecast87
Wed 15:00 · Forecast101
Wed 16:00 · Forecast115
Wed 17:00 · Forecast122
Wed 18:00 · Forecast122
Wed 19:00 · Forecast108
Wed 20:00 · Forecast93
Wed 21:00 · Forecast92
Wed 22:00 · Forecast88
Wed 23:00 · Forecast80
Thu 00:00 · Forecast75
Thu 01:00 · Forecast74
Thu 02:00 · Forecast74
Thu 03:00 · Forecast71
Thu 04:00 · Forecast68
Thu 05:00 · Forecast66
Thu 06:00 · Forecast65
Thu 07:00 · Forecast65
Thu 08:00 · Forecast65
Thu 09:00 · Forecast64

Pollutants this hour

  • PM2.5 11.6 µg/m³ 24-hour mean 15.9 µg/m³ · 1.1× WHO’s 24-hour guideline (15) 57
  • PM10 12 µg/m³ 11
  • O₃ 131 µg/m³ 97
  • NO₂ 6 µg/m³ 3
  • SO₂ 12 µg/m³ 6
  • CO 0.23 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
Johannesburg Gauteng 80
Pretoria Gauteng 74
Evaton Gauteng 80
Soshanguve Gauteng 74
Mbabane Eswatini 68
Gaborone Botswana 53
Manzini Eswatini 68

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 Benoni’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 Benoni right now?
97 on the US EPA scale (Moderate) at 15:00 UTC+2, 3 Nov. O₃ 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 Benoni 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 Benoni get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 59 around 03:00 to 101 around 15:00 (4 Nov). Forecasts beyond a day are less certain.

How does Benoni compare with other cities?
Right now it is the 211th most polluted of 849 cities we track worldwide, and 1st of 9 in South Africa, all on the same US EPA scale.

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