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Air quality · Dong Nai, Vietnam

Biên Hòa Air Quality Index (AQI) today

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

69 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 66.

Over the next 24 hours the model expects the AQI to range from 58 around 15:00 to 90 around 06:00 (4 Nov).

394th most polluted of 849 cities worldwide right now, 2nd of 9 in Vietnam.

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 · 75 21:00 · 76 22:00 · 78 23:00 · 77 00:00 · 74 01:00 · 71 02:00 · 70 03:00 · 69 04:00 · 70 05:00 · 69 06:00 · 70 07:00 · 71 08:00 · 69 09:00 · 66 10:00 · 63 11:00 · 59 12:00 · 55 13:00 · 53 14:00 · 53 15:00 · 54 16:00 · 56 17:00 · 60 18:00 · 64 19:00 · 69 20:00 · 74 21:00 · 76 22:00 · 77 23:00 · 78 00:00 · 79 01:00 · 79 02:00 · 78 03:00 · 77 04:00 · 78 05:00 · 82 06:00 · 90 07:00 · 89 08:00 · 87 09:00 · 80 10:00 · 71 11:00 · 66 12:00 · 64 13:00 · 61 14:00 · 59 15:00 · 58 16:00 · 64 17:00 · 64 18:00 · 68 19:00 · 75 20:00 · 78 21:00 · 81 22:00 · 81 23:00 · 82 00:00 · 84 01:00 · 85 02:00 · 83 03:00 · 80 04:00 · 79 05:00 · 79 06:00 · 80 07:00 · 80 08:00 · 81 09:00 · 80 10:00 · 78 11:00 · 75 12:00 · 73 13:00 · 69 14:00 · 63 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 20:0075
Mon 21:0076
Mon 22:0078
Mon 23:0077
Tue 00:0074
Tue 01:0071
Tue 02:0070
Tue 03:0069
Tue 04:0070
Tue 05:0069
Tue 06:0070
Tue 07:0071
Tue 08:0069
Tue 09:0066
Tue 10:0063
Tue 11:0059
Tue 12:0055
Tue 13:0053
Tue 14:0053
Tue 15:0054
Tue 16:0056
Tue 17:0060
Tue 18:0064
Tue 19:00 · Now69
Tue 20:00 · Forecast74
Tue 21:00 · Forecast76
Tue 22:00 · Forecast77
Tue 23:00 · Forecast78
Wed 00:00 · Forecast79
Wed 01:00 · Forecast79
Wed 02:00 · Forecast78
Wed 03:00 · Forecast77
Wed 04:00 · Forecast78
Wed 05:00 · Forecast82
Wed 06:00 · Forecast90
Wed 07:00 · Forecast89
Wed 08:00 · Forecast87
Wed 09:00 · Forecast80
Wed 10:00 · Forecast71
Wed 11:00 · Forecast66
Wed 12:00 · Forecast64
Wed 13:00 · Forecast61
Wed 14:00 · Forecast59
Wed 15:00 · Forecast58
Wed 16:00 · Forecast64
Wed 17:00 · Forecast64
Wed 18:00 · Forecast68
Wed 19:00 · Forecast75
Wed 20:00 · Forecast78
Wed 21:00 · Forecast81
Wed 22:00 · Forecast81
Wed 23:00 · Forecast82
Thu 00:00 · Forecast84
Thu 01:00 · Forecast85
Thu 02:00 · Forecast83
Thu 03:00 · Forecast80
Thu 04:00 · Forecast79
Thu 05:00 · Forecast79
Thu 06:00 · Forecast80
Thu 07:00 · Forecast80
Thu 08:00 · Forecast81
Thu 09:00 · Forecast80
Thu 10:00 · Forecast78
Thu 11:00 · Forecast75
Thu 12:00 · Forecast73
Thu 13:00 · Forecast69
Thu 14:00 · Forecast63

Pollutants this hour

  • PM2.5 21.5 µg/m³ 24-hour mean 17.1 µg/m³ · 1.1× WHO’s 24-hour guideline (15) 69
  • PM10 23 µg/m³ 19
  • O₃ 21 µg/m³ 30
  • NO₂ 46 µg/m³ 23
  • SO₂ 29 µg/m³ 16
  • CO 0.43 mg/m³ 3

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
Ho Chi Minh City Ho Chi Minh City (HCMC) 69
Cần Thơ Can Tho City 57
Phnom Penh Cambodia 74
Takeo Cambodia 59
Da Nang Da Nang City 37
Huế Thừa Thiên Huế Province 64
Bangkok Thailand 204

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 Biên Hòa’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 Biên Hòa right now?
69 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 Biên Hòa 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 Biên Hòa get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 58 around 15:00 to 90 around 06:00 (4 Nov). Forecasts beyond a day are less certain.

How does Biên Hòa compare with other cities?
Right now it is the 394th most polluted of 849 cities we track worldwide, and 2nd of 9 in Vietnam, all on the same US EPA scale.

Why does another app show a different AQI for Biên Hòa?
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.