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Air quality · Ta‘izz, Yemen

Taiz Air Quality Index (AQI) today

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

107 Unhealthy for sensitive groups

Live estimate · modelled

US EPA AQI15:00 UTC+3, 3 Nov Main pollutant: PM10

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

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 93.

Over the next 24 hours the model expects the AQI to range from 90 around 11:00 to 139 around 07:00 (4 Nov).

180th most polluted of 849 cities worldwide right now, 1st of 5 in Yemen.

What to do today

  • Long walk or run outside Shorter if you have asthma or heart disease
  • Kids playing outside OK, less for kids with asthma
  • Airing the house Open
  • Mask outdoors If you are in a sensitive group

Based on the US EPA’s health statement: “Members of sensitive groups may experience health effects. The general public is less likely to be affected.” General guidance, not medical advice.

Last 24 hours and next 48

Past hours Forecast

16:00 · 108 17:00 · 121 18:00 · 123 19:00 · 113 20:00 · 103 21:00 · 96 22:00 · 93 23:00 · 92 00:00 · 90 01:00 · 91 02:00 · 91 03:00 · 91 04:00 · 92 05:00 · 94 06:00 · 96 07:00 · 105 08:00 · 99 09:00 · 91 10:00 · 87 11:00 · 83 12:00 · 82 13:00 · 85 14:00 · 94 15:00 · 107 16:00 · 120 17:00 · 130 18:00 · 134 19:00 · 126 20:00 · 115 21:00 · 109 22:00 · 107 23:00 · 107 00:00 · 109 01:00 · 110 02:00 · 110 03:00 · 114 04:00 · 118 05:00 · 123 06:00 · 129 07:00 · 139 08:00 · 112 09:00 · 95 10:00 · 91 11:00 · 90 12:00 · 92 13:00 · 95 14:00 · 101 15:00 · 110 16:00 · 118 17:00 · 128 18:00 · 141 19:00 · 146 20:00 · 134 21:00 · 126 22:00 · 131 23:00 · 139 00:00 · 147 01:00 · 155 02:00 · 166 03:00 · 180 04:00 · 196 05:00 · 227 06:00 · 261 07:00 · 274 08:00 · 169 09:00 · 128 10:00 · 113 Now

US EPA AQI per hour, UTC+3. 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 16:00108
Mon 17:00121
Mon 18:00123
Mon 19:00113
Mon 20:00103
Mon 21:0096
Mon 22:0093
Mon 23:0092
Tue 00:0090
Tue 01:0091
Tue 02:0091
Tue 03:0091
Tue 04:0092
Tue 05:0094
Tue 06:0096
Tue 07:00105
Tue 08:0099
Tue 09:0091
Tue 10:0087
Tue 11:0083
Tue 12:0082
Tue 13:0085
Tue 14:0094
Tue 15:00 · Now107
Tue 16:00 · Forecast120
Tue 17:00 · Forecast130
Tue 18:00 · Forecast134
Tue 19:00 · Forecast126
Tue 20:00 · Forecast115
Tue 21:00 · Forecast109
Tue 22:00 · Forecast107
Tue 23:00 · Forecast107
Wed 00:00 · Forecast109
Wed 01:00 · Forecast110
Wed 02:00 · Forecast110
Wed 03:00 · Forecast114
Wed 04:00 · Forecast118
Wed 05:00 · Forecast123
Wed 06:00 · Forecast129
Wed 07:00 · Forecast139
Wed 08:00 · Forecast112
Wed 09:00 · Forecast95
Wed 10:00 · Forecast91
Wed 11:00 · Forecast90
Wed 12:00 · Forecast92
Wed 13:00 · Forecast95
Wed 14:00 · Forecast101
Wed 15:00 · Forecast110
Wed 16:00 · Forecast118
Wed 17:00 · Forecast128
Wed 18:00 · Forecast141
Wed 19:00 · Forecast146
Wed 20:00 · Forecast134
Wed 21:00 · Forecast126
Wed 22:00 · Forecast131
Wed 23:00 · Forecast139
Thu 00:00 · Forecast147
Thu 01:00 · Forecast155
Thu 02:00 · Forecast166
Thu 03:00 · Forecast180
Thu 04:00 · Forecast196
Thu 05:00 · Forecast227
Thu 06:00 · Forecast261
Thu 07:00 · Forecast274
Thu 08:00 · Forecast169
Thu 09:00 · Forecast128
Thu 10:00 · Forecast113

Pollutants this hour

  • PM2.5 33.8 µg/m³ 24-hour mean 32.0 µg/m³ · 2.1× WHO’s 24-hour guideline (15) 91
  • PM10 197 µg/m³ 108
  • O₃ 100 µg/m³ 45
  • NO₂ 0 µg/m³ 0
  • SO₂ 3 µg/m³ 1
  • CO 0.12 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
Ibb Ibb Governorate 99
Aden Aden 68
Al Ḩudaydah Al Hudaydah 66
Sanaa Amanat Alasimah 55
Djibouti Djibouti 71
Asmara Eritrea 55
Addis Ababa Ethiopia 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 Taiz’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 Taiz right now?
107 on the US EPA scale (Unhealthy for sensitive groups) at 15:00 UTC+3, 3 Nov. PM10 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 Taiz today?
For most people, yes; people with asthma, heart or lung disease, older adults and children should take it easier. The EPA’s statement for “Unhealthy for sensitive groups”: Members of sensitive groups may experience health effects. The general public is less likely to be affected. General guidance, not medical advice.

Will the air in Taiz get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 90 around 11:00 to 139 around 07:00 (4 Nov). Forecasts beyond a day are less certain.

How does Taiz compare with other cities?
Right now it is the 180th most polluted of 849 cities we track worldwide, and 1st of 5 in Yemen, all on the same US EPA scale.

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