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Air quality · Victoria, Australia

Melbourne Air Quality Index (AQI) today

Modelled estimate for 23:00 local time (UTC+11), refreshed 3 Nov, 07:52 UTC+0.

56 Moderate

Live estimate · modelled

US EPA AQI23:00 UTC+11, 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 54.

Over the next 24 hours the model expects the AQI to range from 20 around 16:00 to 66 around 02:00 (4 Nov).

553rd most polluted of 849 cities worldwide right now, 2nd of 7 in Australia.

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

00:00 · 64 01:00 · 63 02:00 · 61 03:00 · 59 04:00 · 56 05:00 · 54 06:00 · 52 07:00 · 49 08:00 · 50 09:00 · 52 10:00 · 52 11:00 · 53 12:00 · 53 13:00 · 52 14:00 · 52 15:00 · 52 16:00 · 52 17:00 · 51 18:00 · 50 19:00 · 50 20:00 · 50 21:00 · 51 22:00 · 53 23:00 · 56 00:00 · 61 01:00 · 65 02:00 · 66 03:00 · 65 04:00 · 64 05:00 · 62 06:00 · 60 07:00 · 58 08:00 · 57 09:00 · 56 10:00 · 53 11:00 · 44 12:00 · 33 13:00 · 28 14:00 · 24 15:00 · 22 16:00 · 20 17:00 · 21 18:00 · 22 19:00 · 21 20:00 · 21 21:00 · 20 22:00 · 23 23:00 · 22 00:00 · 21 01:00 · 21 02:00 · 23 03:00 · 25 04:00 · 28 05:00 · 31 06:00 · 33 07:00 · 34 08:00 · 39 09:00 · 45 10:00 · 48 11:00 · 49 12:00 · 51 13:00 · 52 14:00 · 53 15:00 · 53 16:00 · 54 17:00 · 54 18:00 · 54 Now

US EPA AQI per hour, UTC+11. 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
Tue 00:0064
Tue 01:0063
Tue 02:0061
Tue 03:0059
Tue 04:0056
Tue 05:0054
Tue 06:0052
Tue 07:0049
Tue 08:0050
Tue 09:0052
Tue 10:0052
Tue 11:0053
Tue 12:0053
Tue 13:0052
Tue 14:0052
Tue 15:0052
Tue 16:0052
Tue 17:0051
Tue 18:0050
Tue 19:0050
Tue 20:0050
Tue 21:0051
Tue 22:0053
Tue 23:00 · Now56
Wed 00:00 · Forecast61
Wed 01:00 · Forecast65
Wed 02:00 · Forecast66
Wed 03:00 · Forecast65
Wed 04:00 · Forecast64
Wed 05:00 · Forecast62
Wed 06:00 · Forecast60
Wed 07:00 · Forecast58
Wed 08:00 · Forecast57
Wed 09:00 · Forecast56
Wed 10:00 · Forecast53
Wed 11:00 · Forecast44
Wed 12:00 · Forecast33
Wed 13:00 · Forecast28
Wed 14:00 · Forecast24
Wed 15:00 · Forecast22
Wed 16:00 · Forecast20
Wed 17:00 · Forecast21
Wed 18:00 · Forecast22
Wed 19:00 · Forecast21
Wed 20:00 · Forecast21
Wed 21:00 · Forecast20
Wed 22:00 · Forecast23
Wed 23:00 · Forecast22
Thu 00:00 · Forecast21
Thu 01:00 · Forecast21
Thu 02:00 · Forecast23
Thu 03:00 · Forecast25
Thu 04:00 · Forecast28
Thu 05:00 · Forecast31
Thu 06:00 · Forecast33
Thu 07:00 · Forecast34
Thu 08:00 · Forecast39
Thu 09:00 · Forecast45
Thu 10:00 · Forecast48
Thu 11:00 · Forecast49
Thu 12:00 · Forecast51
Thu 13:00 · Forecast52
Thu 14:00 · Forecast53
Thu 15:00 · Forecast53
Thu 16:00 · Forecast54
Thu 17:00 · Forecast54
Thu 18:00 · Forecast54

Pollutants this hour

  • PM2.5 14.1 µg/m³ 24-hour mean 10.5 µg/m³ · within WHO’s 24-hour guideline (15) 56
  • PM10 19 µg/m³ 15
  • O₃ 24 µg/m³ 19
  • NO₂ 19 µg/m³ 9
  • SO₂ 4 µg/m³ 1
  • CO 0.17 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
Canberra Australian Capital Territory 28
Adelaide South Australia 37
Sydney New South Wales 58
Gold Coast Queensland 32
Brisbane Queensland 31
Wellington New Zealand 36
Auckland New Zealand 38

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 Melbourne’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 Melbourne right now?
56 on the US EPA scale (Moderate) at 23:00 UTC+11, 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 Melbourne 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 Melbourne get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 20 around 16:00 to 66 around 02:00 (4 Nov). Forecasts beyond a day are less certain.

How does Melbourne compare with other cities?
Right now it is the 553rd most polluted of 849 cities we track worldwide, and 2nd of 7 in Australia, all on the same US EPA scale.

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