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Air quality · East Java, Indonesia

Surabaya Air Quality Index (AQI) today

Modelled estimate for 19:00 local time (UTC+7), refreshed 3 Nov, 07:52 UTC+0.

83 Moderate

Live estimate · modelled

US EPA AQI19:00 UTC+7, 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 110.

Over the next 24 hours the model expects the AQI to range from 85 around 20:00 to 171 around 06:00 (4 Nov).

283rd most polluted of 849 cities worldwide right now, 18th of 25 in Indonesia.

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

20:00 · 100 21:00 · 110 22:00 · 115 23:00 · 118 00:00 · 123 01:00 · 129 02:00 · 132 03:00 · 139 04:00 · 149 05:00 · 155 06:00 · 160 07:00 · 156 08:00 · 137 09:00 · 114 10:00 · 98 11:00 · 90 12:00 · 84 13:00 · 80 14:00 · 78 15:00 · 77 16:00 · 77 17:00 · 77 18:00 · 81 19:00 · 83 20:00 · 85 21:00 · 92 22:00 · 106 23:00 · 121 00:00 · 130 01:00 · 140 02:00 · 144 03:00 · 151 04:00 · 156 05:00 · 165 06:00 · 171 07:00 · 158 08:00 · 141 09:00 · 117 10:00 · 102 11:00 · 96 12:00 · 96 13:00 · 94 14:00 · 91 15:00 · 100 16:00 · 108 17:00 · 108 18:00 · 97 19:00 · 96 20:00 · 101 21:00 · 113 22:00 · 131 23:00 · 152 00:00 · 159 01:00 · 164 02:00 · 165 03:00 · 169 04:00 · 173 05:00 · 178 06:00 · 183 07:00 · 165 08:00 · 153 09:00 · 129 10:00 · 113 11:00 · 104 12:00 · 99 13:00 · 93 14:00 · 87 Now

US EPA AQI per hour, UTC+7. 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 20:00100
Mon 21:00110
Mon 22:00115
Mon 23:00118
Tue 00:00123
Tue 01:00129
Tue 02:00132
Tue 03:00139
Tue 04:00149
Tue 05:00155
Tue 06:00160
Tue 07:00156
Tue 08:00137
Tue 09:00114
Tue 10:0098
Tue 11:0090
Tue 12:0084
Tue 13:0080
Tue 14:0078
Tue 15:0077
Tue 16:0077
Tue 17:0077
Tue 18:0081
Tue 19:00 · Now83
Tue 20:00 · Forecast85
Tue 21:00 · Forecast92
Tue 22:00 · Forecast106
Tue 23:00 · Forecast121
Wed 00:00 · Forecast130
Wed 01:00 · Forecast140
Wed 02:00 · Forecast144
Wed 03:00 · Forecast151
Wed 04:00 · Forecast156
Wed 05:00 · Forecast165
Wed 06:00 · Forecast171
Wed 07:00 · Forecast158
Wed 08:00 · Forecast141
Wed 09:00 · Forecast117
Wed 10:00 · Forecast102
Wed 11:00 · Forecast96
Wed 12:00 · Forecast96
Wed 13:00 · Forecast94
Wed 14:00 · Forecast91
Wed 15:00 · Forecast100
Wed 16:00 · Forecast108
Wed 17:00 · Forecast108
Wed 18:00 · Forecast97
Wed 19:00 · Forecast96
Wed 20:00 · Forecast101
Wed 21:00 · Forecast113
Wed 22:00 · Forecast131
Wed 23:00 · Forecast152
Thu 00:00 · Forecast159
Thu 01:00 · Forecast164
Thu 02:00 · Forecast165
Thu 03:00 · Forecast169
Thu 04:00 · Forecast173
Thu 05:00 · Forecast178
Thu 06:00 · Forecast183
Thu 07:00 · Forecast165
Thu 08:00 · Forecast153
Thu 09:00 · Forecast129
Thu 10:00 · Forecast113
Thu 11:00 · Forecast104
Thu 12:00 · Forecast99
Thu 13:00 · Forecast93
Thu 14:00 · Forecast87

Pollutants this hour

  • PM2.5 28.8 µg/m³ 24-hour mean 39.3 µg/m³ · 2.6× WHO’s 24-hour guideline (15) 83
  • PM10 32 µg/m³ 27
  • O₃ 62 µg/m³ 49
  • NO₂ 27 µg/m³ 13
  • SO₂ 21 µg/m³ 11
  • CO 0.55 mg/m³ 5

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
Malang East Java 105
Situbondo East Java 62
Jepara Central Java 77
Semarang Central Java 159
Denpasar Bali 56
Banjarmasin South Kalimantan 108
Tasikmalaya West Java 86

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 Surabaya’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 Surabaya right now?
83 on the US EPA scale (Moderate) at 19:00 UTC+7, 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 Surabaya 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 Surabaya get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 85 around 20:00 to 171 around 06:00 (4 Nov). Forecasts beyond a day are less certain.

How does Surabaya compare with other cities?
Right now it is the 283rd most polluted of 849 cities we track worldwide, and 18th of 25 in Indonesia, all on the same US EPA scale.

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