Air quality comparison · Venezuela, 103 km apart
Ciudad Bolívar vs Ciudad Guayana Air quality index (AQI) today
Ciudad Guayana has cleaner air than Ciudad Bolívar right now: AQI 14 (Good) against 29 (Good).
Both sit in the same EPA band, so the health advice is the same for each today. Over the past 6 days, on modeled daily averages, Ciudad Guayana averaged AQI 43 against 49, and it was the cleaner of the two on 5 of those days. Ciudad Guayana has lost more forest since 2001. Ciudad Bolívar has more tree cover.
Venezuela
AQI 29
Good
Cleaner right now
- PM2.5
- 4.8 µg/m³
- Main pollutant
- PM2.5
- Source
- Model estimate
- Reading
- Nov 11, 00:00 local
Venezuela
AQI 14
Good
Cleaner right now
- PM2.5
- 2.6 µg/m³
- Main pollutant
- PM2.5
- Source
- Model estimate
- Reading
- Nov 10, 09:00 local
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Ciudad Bolívar29Ciudad Guayana14
Head to head
Ciudad Bolívar vs Ciudad Guayana at a glance
Ciudad Bolívar and Ciudad Guayana are level, each ahead on 3 of 6 measures. The better figure in each row is marked.
| Ciudad Bolívar | Ciudad Guayana | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 29 | 14 (better) |
| PM2.5Fine particles, µg/m³. | 4.8 | 2.6 (better) |
| Past week's averageUS AQI, 6 days. | 49 | 43 (better) |
| Forest lost since 2001Within 10 km of the center. | 173 ha (better) | 1,320 ha |
| Tree coverWithin 2 km of the center. | 24.2% (better) | 16.1% |
| Trees still neededTo reach a healthy canopy. | 18.2K (better) | 43.7K |
Air quality today
What is the air like in Ciudad Bolívar and Ciudad Guayana right now?
Ciudad Guayana has cleaner air than Ciudad Bolívar right now: AQI 14 (Good) against 29 (Good). PM2.5 is setting the index in both.
Both readings are model estimates, with no ground station close enough to either.
Ciudad BolívarCiudad Guayana
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).
Ciudad Bolívar: Model estimate · no ground station nearby. Data: Open-Meteo / CAMS, US EPA index.
Ciudad Guayana: Model estimate · no ground station nearby. Data: Open-Meteo / CAMS, US EPA index.
The past week
Which had cleaner air over the past 6 days?
Over the past 6 days, on modeled daily averages, Ciudad Guayana averaged AQI 43 against 49, and it was the cleaner of the two on 5 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
- Ciudad Bolívar1Ciudad Guayana5
- Average AQI
- Ciudad Bolívar49Ciudad Guayana43
- Worst day, AQI
- Ciudad Bolívar69Ciudad Guayana67
The daily numbers (6 days)
| Day | Ciudad Bolívar | Ciudad Guayana |
|---|---|---|
| Nov 5 | 52 | 42 |
| Nov 6 | 45 | 46 |
| Nov 7 | 69 | 67 |
| Nov 8 | 65 | 54 |
| Nov 9 | 40 | 31 |
| Nov 10 | 22 | 16 |
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 Ciudad Bolívar and Ciudad Guayana 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 Ciudad Bolívar and Ciudad Guayana compare with the rest of the world?
Right now Ciudad Bolívar's air is cleaner than 80% of the 5,420 places Airleaf tracks, and Ciudad Guayana's is cleaner than 93%. Within Venezuela, that is 63% and 88% of its 57 measured places.
Cleaner air than…
- Ciudad Bolívar
- Beats 80%
- Ciudad Guayana
- Beats 93%
More tree cover than…
- Ciudad Bolívar
- Beats 56%
- Ciudad Guayana
- Beats 37%
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, Ciudad Bolívar or Ciudad Guayana?
Ciudad Guayana has lost more: about 1,320 ha of forest within 10 km of its center from 2001 to 2025, against 173 ha around Ciudad Bolívar. 1,290 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: 2008, with 19 ha lost.
Worst year: 2008, with 128 ha lost.
| Ciudad Bolívar | Ciudad Guayana | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 173 ha (better) | 1,320 ha |
| Share of its forestOf what it had in 2000. | 2.9% (better) | 9.9% |
| Cleared for goodTurned into farms, mines or towns. | 152 ha (better) | 1,290 ha |
| Recent trend2021–2025 against the five years before. | Too little to call | Slowing down |
| Main known cause | Farms, pasture and plantations (59%) | Farms, pasture and plantations (95%) |
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.
Ciudad Bolívar
2017: satellite photo from November 2017 of a 5 × 5 km area in the city center.
Ciudad Guayana
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km east of the city center.
Trees
Which has more trees, Ciudad Bolívar or Ciudad Guayana?
Ciudad Bolívar has more tree cover: 24.2% of the land within 2 km of its center against 16.1% around Ciudad Guayana, or about 76,027 trees against 50,580.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Ciudad Bolívar | Ciudad Guayana | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 76.0K (better) | 50.6K |
| Trees still neededTo reach the target. Fewer is better. | 18.2K (better) | 43.7K |
| CO₂ absorbed each yearBy the trees already standing. | 1.7M kg (better) | 1.1M 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
Ciudad Bolívar vs Ciudad Guayana: your questions answered
Is Ciudad Guayana cleaner than Ciudad Bolívar?
On air quality, yes, right now: Ciudad Guayana reads AQI 14 against 29, a gap of 15 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 6 days, on modeled daily averages, Ciudad Guayana averaged AQI 43 against 49, and it was the cleaner of the two on 5 of those days.
Is it safe to exercise outdoors in Ciudad Bolívar and Ciudad Guayana today?
The advice is the same for both today. Air quality is satisfactory for everyone. Ciudad Bolívar reads AQI 29 and Ciudad Guayana reads AQI 14.
Which has lost more forest, Ciudad Bolívar or Ciudad Guayana?
Ciudad Guayana has lost more: about 1,320 ha of forest within 10 km of its center from 2001 to 2025, against 173 ha around Ciudad Bolívar. 1,290 ha of that was cleared for good, for farms, mines or towns.
Which has more trees, Ciudad Bolívar or Ciudad Guayana?
Ciudad Bolívar has more tree cover: 24.2% of the land within 2 km of its center against 16.1% around Ciudad Guayana, or about 76,027 trees against 50,580. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Ciudad Bolívar and Ciudad Guayana need?
Ciudad Bolívar needs about 18,221 more to reach its canopy target of 30%, and Ciudad Guayana about 43,668 to reach 30%. The target starts at 30% of the land and rises where air quality is poor.
Are Ciudad Bolívar and Ciudad Guayana 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 Ciudad Bolívar vs Ciudad Guayana 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 22, 2026 and Sep 14, 2026), and the forest figures are published yearly.
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