Air quality comparison · Gabon, 543 km apart
Franceville vs Port-Gentil Air quality index (AQI) today
Port-Gentil has cleaner air than Franceville right now: AQI 11 (Good) against 56 (Moderate).
That puts them in different EPA bands, so the health advice differs today. Over the past 7 days, on modeled daily averages, Port-Gentil averaged AQI 38 against 40, and it was the cleaner of the two on 3 of those days. Franceville has lost more forest since 2001. Franceville has more tree cover.
Gabon
AQI 56
Moderate
Cleaner right now
- PM2.5
- 11.7 µg/m³
- Main pollutant
- PM2.5
- Source
- Model estimate
- Reading
- Nov 10, 19:00 local
Gabon
AQI 11
Good
Cleaner right now
- PM2.5
- 1.5 µg/m³
- Main pollutant
- PM2.5
- Source
- Model estimate
- Reading
- Nov 10, 16:00 local
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Franceville56Port-Gentil11
Head to head
Franceville vs Port-Gentil at a glance
Port-Gentil is ahead on 4 of 6 measures, and Franceville on 2. The better figure in each row is marked.
| Franceville | Port-Gentil | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 56 | 11 (better) |
| PM2.5Fine particles, µg/m³. | 11.7 | 1.5 (better) |
| Past week's averageUS AQI, 7 days. | 40 | 38 (better) |
| Forest lost since 2001Within 10 km of the center. | 7,100 ha | 164 ha (better) |
| Tree coverWithin 2 km of the center. | 49.5% (better) | 4.1% |
| Trees still neededTo reach a healthy canopy. | 0 (better) | 59.0K |
Air quality today
What is the air like in Franceville and Port-Gentil right now?
Port-Gentil has cleaner air than Franceville right now: AQI 11 (Good) against 56 (Moderate). PM2.5 is setting the index in both.
Both readings are model estimates, with no ground station close enough to either.
FrancevillePort-Gentil
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).
Franceville: Model estimate · no ground station nearby. Data: Open-Meteo / CAMS, US EPA index.
Port-Gentil: 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?
Over the past 7 days, on modeled daily averages, Port-Gentil averaged AQI 38 against 40, and it was the cleaner of the two on 3 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
- Franceville4Port-Gentil3
- Average AQI
- Franceville40Port-Gentil38
- Worst day, AQI
- Franceville58Port-Gentil47
The daily numbers (7 days)
| Day | Franceville | Port-Gentil |
|---|---|---|
| Nov 4 | 39 | 40 |
| Nov 5 | 38 | 29 |
| Nov 6 | 39 | 40 |
| Nov 7 | 27 | 36 |
| Nov 8 | 37 | 47 |
| Nov 9 | 45 | 44 |
| Nov 10 | 58 | 32 |
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 Franceville and Port-Gentil today?
Franceville (AQI 56, Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Port-Gentil (AQI 11, Good): Air quality is satisfactory for everyone.
Exercise outdoors
- Franceville
- Fine for most people; unusually sensitive people should take long or hard exercise easier.
- Port-Gentil
- A good day to be active outside.
Windows
- Franceville
- Fine to open; close them if you are sensitive to pollution.
- Port-Gentil
- Open them to air the house.
Masks
- Franceville
- Not needed for most people.
- Port-Gentil
- Not needed.
Air purifier
- Franceville
- Worth running if you are sensitive.
- Port-Gentil
- Not needed.
Against everywhere else
How do Franceville and Port-Gentil compare with the rest of the world?
Right now Franceville's air is cleaner than 51% of the 5,420 places Airleaf tracks, and Port-Gentil's is cleaner than 96%. Within Gabon, that is 0% and 100% of its 5 measured places.
Cleaner air than…
- Franceville
- Beats 51%
- Port-Gentil
- Beats 96%
More tree cover than…
- Franceville
- Beats 92%
- Port-Gentil
- Beats 8%
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, Franceville or Port-Gentil?
Franceville has lost more: about 7,100 ha of forest within 10 km of its center from 2001 to 2025, against 164 ha around Port-Gentil. 472 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: 2016, with 821 ha lost.
Worst year: 2013, with 48 ha lost.
| Franceville | Port-Gentil | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 7,100 ha | 164 ha (better) |
| Share of its forestOf what it had in 2000. | 26% | 4.7% (better) |
| Cleared for goodTurned into farms, mines or towns. | 472 ha | 144 ha (better) |
| Recent trend2021–2025 against the five years before. | Holding steady | Too little to call |
| Main known cause | Shifting farming (93%) | Towns and roads (65%) |
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.
Franceville
2017: satellite photo from March 2017 of a 5 × 5 km area about 6 km north of the city center.
Port-Gentil
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
Trees
Which has more trees, Franceville or Port-Gentil?
Franceville has more tree cover: 49.5% of the land within 2 km of its center against 4.1% around Port-Gentil, or about 155,509 trees against 9,338.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Franceville | Port-Gentil | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 156K (better) | 9.3K |
| Trees still neededTo reach the target. Fewer is better. | 0 (better) | 59.0K |
| CO₂ absorbed each yearBy the trees already standing. | 3.4M kg (better) | 205K kg |
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
Franceville vs Port-Gentil: your questions answered
Is Port-Gentil cleaner than Franceville?
On air quality, yes, right now: Port-Gentil reads AQI 11 against 56, a gap of 45 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, Port-Gentil averaged AQI 38 against 40, and it was the cleaner of the two on 3 of those days.
Is it safe to exercise outdoors in Franceville and Port-Gentil today?
In Franceville, at AQI 56: Unusually sensitive people should consider limiting long outdoor exertion. In Port-Gentil, at AQI 11: Air quality is satisfactory for everyone.
Which has lost more forest, Franceville or Port-Gentil?
Franceville has lost more: about 7,100 ha of forest within 10 km of its center from 2001 to 2025, against 164 ha around Port-Gentil. 472 ha of that was cleared for good, for farms, mines or towns.
Which has more trees, Franceville or Port-Gentil?
Franceville has more tree cover: 49.5% of the land within 2 km of its center against 4.1% around Port-Gentil, or about 155,509 trees against 9,338. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Franceville and Port-Gentil need?
Franceville needs about 0 more to reach its canopy target of 30%, and Port-Gentil about 58,991 to reach 30%. The target starts at 30% of the land and rises where air quality is poor.
Are Franceville and Port-Gentil 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 Franceville vs Port-Gentil 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 (Aug 17, 2026 and Oct 4, 2026), and the forest figures are published yearly.
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