Air quality comparison · Yemen, 142 km apart
Aden vs Taiz Air quality index (AQI) today
Taiz has cleaner air than Aden right now: AQI 32 (Good) against 69 (Moderate).
That puts them in different EPA bands, so the health advice differs today. But over the past 7 days, on modeled daily averages, Aden averaged AQI 63 against 87, and it was the cleaner of the two on 4 of those days. Taiz has more tree cover.
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Aden69Taiz32
Head to head
Aden vs Taiz at a glance
Taiz is ahead on 3 of 5 measures, and Aden on 2. The better figure in each row is marked.
| Aden | Taiz | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 69 | 32 (better) |
| PM2.5Fine particles, µg/m³. | 19.6 | 6.3 (better) |
| Past week's averageUS AQI, 7 days. | 63 (better) | 87 |
| Tree coverWithin 2 km of the center. | 0.3% | 6.7% (better) |
| Trees still neededTo reach a healthy canopy. | 61.1K (better) | 73.2K |
Air quality today
What is the air like in Aden and Taiz right now?
Taiz has cleaner air than Aden right now: AQI 32 (Good) against 69 (Moderate). PM2.5 is setting the index in both.
Aden's PM2.5 is about 1.3× the WHO's 24-hour guideline of 15 µg/m³.
Both readings are model estimates, with no ground station close enough to either.
AdenTaiz
Concentrations at the same moment as the index above, for the pollutants both places report. Lower is better. The dark marks on the PM2.5 and PM10 rows show the WHO's 24-hour guidelines (15 and 45 µg/m³).
Aden: Model estimate · no ground station nearby. Data: Open-Meteo / CAMS, US EPA index.
Taiz: Model estimate · no ground station nearby. Data: Open-Meteo / CAMS, US EPA index.
The past week
Which had cleaner air over the past 7 days?
But over the past 7 days, on modeled daily averages, Aden averaged AQI 63 against 87, and it was the cleaner of the two on 4 of those days. A single reading can catch a city on a bad afternoon; the week says whether it was the weather or the place.
- Cleaner days
- Aden4Taiz3
- Average AQI
- Aden63Taiz87
- Worst day, AQI
- Aden72Taiz134
The daily numbers (7 days)
| Day | Aden | Taiz |
|---|---|---|
| Nov 5 | 72 | 102 |
| Nov 6 | 59 | 129 |
| Nov 7 | 72 | 134 |
| Nov 8 | 58 | 103 |
| Nov 9 | 60 | 51 |
| Nov 10 | 58 | 54 |
| Nov 11 | 61 | 37 |
Daily averages from the CAMS atmospheric model for both places, so the week compares like with like. They can differ from today's reading at the top of the page wherever that comes from a ground station.
What it means today
Is it safe to go outside in Aden and Taiz today?
Aden (AQI 69, Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Taiz (AQI 32, Good): Air quality is satisfactory for everyone.
Exercise outdoors
- Aden
- Fine for most people; unusually sensitive people should take long or hard exercise easier.
- Taiz
- A good day to be active outside.
Windows
- Aden
- Fine to open; close them if you are sensitive to pollution.
- Taiz
- Open them to air the house.
Masks
- Aden
- Not needed for most people.
- Taiz
- Not needed.
Air purifier
- Aden
- Worth running if you are sensitive.
- Taiz
- Not needed.
Against everywhere else
How do Aden and Taiz compare with the rest of the world?
Right now Aden's air is cleaner than 38% of the 5,420 places Airleaf tracks, and Taiz's is cleaner than 77%. Within Yemen, that is 0% and 100% of its 7 measured places.
Cleaner air than…
- Aden
- Beats 38%
- Taiz
- Beats 77%
More tree cover than…
- Aden
- Beats 1%
- Taiz
- Beats 13%
Includes model estimates as well as station readings, so it can differ from our most polluted and cleanest air rankings, which use station readings only.
Satellite timelapses
Watch both change, year by year
A clear satellite photo a year of the land around each city. Press play, turn on the forest cleared since the first year, or drag the before and after.
Aden
2017: satellite photo from November 2017 of a 5 × 5 km area in the city center.
Taiz
2017: satellite photo from January 2017 of a 5 × 5 km area in the city center.
Trees
Which has more trees, Aden or Taiz?
Taiz has more tree cover: 6.7% of the land within 2 km of its center against 0.3% around Aden, or about 21,049 trees against 617.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Aden | Taiz | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 617 | 21.0K (better) |
| Trees still neededTo reach the target. Fewer is better. | 61.1K (better) | 73.2K |
| CO₂ absorbed each yearBy the trees already standing. | 13.6K kg | 463K kg (better) |
Tree cover on the satellite image
The same 2 km radius around each center, with the tree cover the satellite found marked on it.
Reading these numbers
How this comparison is made
Air quality index
The US EPA index, computed from current pollutant concentrations: ground stations where a place has them nearby, and the CAMS atmospheric model everywhere else. It moves hour to hour, so it is a snapshot rather than a verdict on either place. The guideline marks are from the WHO's 2021 air quality guidelines.
Trees and forest
Tree cover is the share of ground under canopy within 2 km of each center, read from Sentinel-2 satellite imagery at 10 m detail. It measures that circle, not the whole municipality, which is what makes the two comparable. Forest loss comes from the University of Maryland's Global Forest Change maps.
More on the method on the About Airleaf page.
Frequently asked
Aden vs Taiz: your questions answered
Is Taiz cleaner than Aden?
On air quality, yes, right now: Taiz reads AQI 32 against 69, a gap of 37 points on the US EPA index. This is a live reading rather than an annual average, so it can reverse within a day. But over the past 7 days, on modeled daily averages, Aden averaged AQI 63 against 87, and it was the cleaner of the two on 4 of those days.
Is it safe to exercise outdoors in Aden and Taiz today?
In Aden, at AQI 69: Unusually sensitive people should consider limiting long outdoor exertion. In Taiz, at AQI 32: Air quality is satisfactory for everyone.
Which has more trees, Aden or Taiz?
Taiz has more tree cover: 6.7% of the land within 2 km of its center against 0.3% around Aden, or about 21,049 trees against 617. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Aden and Taiz need?
Aden needs about 61,115 more to reach its canopy target of 30%, and Taiz about 73,199 to reach 30%. The target starts at 30% of the land and rises where air quality is poor.
Are Aden and Taiz measured the same way?
The method is the same: the US EPA index for air, and Sentinel-2 satellite imagery at 10 m detail over an identical radius for trees. Both readings are model estimates, with no ground station close enough to either. Nothing is adjusted for population, city limits or climate.
How often does the Aden vs Taiz comparison update?
The air readings refresh about once an hour, and each reading's local time is shown at the top of the page. Tree cover comes from the latest clear satellite image of each area (Sep 18, 2026 and Sep 18, 2026), and the forest figures are published yearly.
Keep going
Compare them with somewhere else
Build your own
Compare Aden with somewhere else
This place
Aden