Air quality comparison · Vietnam, 741 km apart
Cần Thơ vs Huế Air quality index (AQI) today
Huế has cleaner air than Cần Thơ right now: AQI 27 (Good) against 31 (Good).
Both sit in the same EPA band, so the health advice is the same for each today. Over the past 7 days, on modeled daily averages, Huế averaged AQI 58 against 69, and it was the cleaner of the two on 6 of those days. Huế has lost more forest since 2001. Cần Thơ has more tree cover.
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Cần Thơ31Huế27
Head to head
Cần Thơ vs Huế at a glance
Cần Thơ is ahead on 4 of 6 measures, and Huế on 2. The better figure in each row is marked.
| Cần Thơ | Huế | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 31 | 27 (better) |
| PM2.5Fine particles, µg/m³. | 4.7 (better) | 4.8 |
| Past week's averageUS AQI, 7 days. | 69 | 58 (better) |
| Forest lost since 2001Within 10 km of the center. | 50 ha (better) | 1,690 ha |
| Tree coverWithin 2 km of the center. | 22.0% (better) | 21.2% |
| Trees still neededTo reach a healthy canopy. | 19.6K (better) | 26.7K |
Air quality today
What is the air like in Cần Thơ and Huế right now?
Huế has cleaner air than Cần Thơ right now: AQI 27 (Good) against 31 (Good). PM2.5 is setting the index in both.
Huế is read from a nearby ground station and Cần Thơ is a model estimate, so the two are not quite like for like.
Cần ThơHuế
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).
Cần Thơ: Estimate · model corrected with 4 station cities within 145 km, e.g. Can Giuoc and Ho Chi Minh City. Data: Open-Meteo / CAMS, corrected with 4 ground-station cities within 145 km, US EPA index.
Huế: Ground station · Thừa Thiên Huế/83 Hùng Vương, Vietnam, 100 m away. Data: World Air Quality Index Project, Vietnam Center For Environmental Monitoring Portal (cổng thông tin quan trắc môi trường).
The past week
Which had cleaner air over the past 7 days?
Over the past 7 days, on modeled daily averages, Huế averaged AQI 58 against 69, and it was the cleaner of the two on 6 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
- Cần Thơ1Huế6
- Average AQI
- Cần Thơ69Huế58
- Worst day, AQI
- Cần Thơ76Huế75
The daily numbers (7 days)
| Day | Cần Thơ | Huế |
|---|---|---|
| Nov 5 | 69 | 58 |
| Nov 6 | 70 | 54 |
| Nov 7 | 76 | 48 |
| Nov 8 | 71 | 55 |
| Nov 9 | 70 | 52 |
| Nov 10 | 70 | 62 |
| Nov 11 | 60 | 75 |
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 Cần Thơ and Huế today?
Air quality is satisfactory for everyone. Both are in the same EPA band today (Good), so the advice is the same.
Exercise outdoors
A good day to be active outside.
Windows
Open them to air the house.
Masks
Not needed.
Air purifier
Not needed.
Against everywhere else
How do Cần Thơ and Huế compare with the rest of the world?
Right now Cần Thơ's air is cleaner than 79% of the 5,420 places Airleaf tracks, and Huế's is cleaner than 83%. Within Vietnam, that is 63% and 73% of its 114 measured places.
Cleaner air than…
- Cần Thơ
- Beats 79%
- Huế
- Beats 83%
More tree cover than…
- Cần Thơ
- Beats 51%
- Huế
- Beats 49%
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.
Deforestation · 2001–2025
Which has lost more forest, Cần Thơ or Huế?
Huế has lost more: about 1,690 ha of forest within 10 km of its center from 2001 to 2025, against 50 ha around Cần Thơ. 120 ha of that was cleared for good, for farms, mines or towns.
Measured within 10 km of each center, from the yearly satellite maps of forest loss: a wider circle than the one for tree cover, because forest is usually lost at a city's edges.
Worst year: 2010, with 8 ha lost.
Worst year: 2021, with 232 ha lost.
| Cần Thơ | Huế | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 50 ha (better) | 1,690 ha |
| Share of its forestOf what it had in 2000. | 2.7% (better) | 34% |
| Cleared for goodTurned into farms, mines or towns. | 30 ha (better) | 120 ha |
| Recent trend2021–2025 against the five years before. | Too little to call | Slowing down |
| Main known cause | Towns and roads (35%) | Logging (92%) |
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.
Cần Thơ
2017: satellite photo from March 2017 of a 5 × 5 km area in the city center.
Huế
2017: satellite photo from April 2017 of a 5 × 5 km area about 7 km south of the city center.
Trees
Which has more trees, Cần Thơ or Huế?
Cần Thơ has more tree cover: 22.0% of the land within 2 km of its center against 21.2% around Huế, or about 53,910 trees against 64,204.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Cần Thơ | Huế | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 53.9K | 64.2K (better) |
| Trees still neededTo reach the target. Fewer is better. | 19.6K (better) | 26.7K |
| CO₂ absorbed each yearBy the trees already standing. | 1.2M kg | 1.4M 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
Cần Thơ vs Huế: your questions answered
Is Huế cleaner than Cần Thơ?
On air quality, yes, right now: Huế reads AQI 27 against 31, a gap of 4 points on the US EPA index. This is a live reading rather than an annual average, so it can reverse within a day. Over the past 7 days, on modeled daily averages, Huế averaged AQI 58 against 69, and it was the cleaner of the two on 6 of those days.
Is it safe to exercise outdoors in Cần Thơ and Huế today?
The advice is the same for both today. Air quality is satisfactory for everyone. Cần Thơ reads AQI 31 and Huế reads AQI 27.
Which has lost more forest, Cần Thơ or Huế?
Huế has lost more: about 1,690 ha of forest within 10 km of its center from 2001 to 2025, against 50 ha around Cần Thơ. 120 ha of that was cleared for good, for farms, mines or towns.
Which has more trees, Cần Thơ or Huế?
Cần Thơ has more tree cover: 22.0% of the land within 2 km of its center against 21.2% around Huế, or about 53,910 trees against 64,204. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Cần Thơ and Huế need?
Cần Thơ needs about 19,604 more to reach its canopy target of 30%, and Huế about 26,651 to reach 30%. The target starts at 30% of the land and rises where air quality is poor.
Are Cần Thơ and Huế 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. Huế is read from a nearby ground station and Cần Thơ is a model estimate, so the two are not quite like for like. Nothing is adjusted for population, city limits or climate.
How often does the Cần Thơ vs Huế 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 (Apr 24, 2026 and Aug 12, 2026), and the forest figures are published yearly.
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