Air quality comparison · Romania, 289 km apart
Braşov vs Constanţa Air quality index (AQI) today
Braşov has cleaner air than Constanţa right now: AQI 57 (Moderate) against 102 (Unhealthy for sensitive groups).
That puts them in different EPA bands, so the health advice differs today. But over the past 6 days, on modeled daily averages, Constanţa averaged AQI 37 against 73, and it was the cleaner of the two on 6 of those days. Braşov has lost more forest since 2001. Braşov has more tree cover.
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Braşov57Constanţa102
Head to head
Braşov vs Constanţa at a glance
Braşov is ahead on 4 of 6 measures, and Constanţa on 2. The better figure in each row is marked.
| Braşov | Constanţa | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 57 (better) | 102 |
| PM2.5Fine particles, µg/m³. | 12.4 (better) | 35.8 |
| Past week's averageUS AQI, 6 days. | 73 | 37 (better) |
| Forest lost since 2001Within 10 km of the center. | 600 ha | 1 ha (better) |
| Tree coverWithin 2 km of the center. | 36.9% (better) | 19.3% |
| Trees still neededTo reach a healthy canopy. | 0 (better) | 48.3K |
Air quality today
What is the air like in Braşov and Constanţa right now?
Braşov has cleaner air than Constanţa right now: AQI 57 (Moderate) against 102 (Unhealthy for sensitive groups). PM2.5 is setting the index in both.
Constanţa's PM2.5 is about 2.4× the WHO's 24-hour guideline of 15 µg/m³.
Both readings come from nearby ground stations.
BraşovConstanţa
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).
The past week
Which had cleaner air over the past 6 days?
But over the past 6 days, on modeled daily averages, Constanţa averaged AQI 37 against 73, 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
- Braşov0Constanţa6
- Average AQI
- Braşov73Constanţa37
- Worst day, AQI
- Braşov107Constanţa57
The daily numbers (6 days)
| Day | Braşov | Constanţa |
|---|---|---|
| Nov 5 | 52 | 27 |
| Nov 6 | 66 | 57 |
| Nov 7 | 63 | 26 |
| Nov 8 | 70 | 33 |
| Nov 9 | 80 | 37 |
| Nov 10 | 107 | 40 |
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 Braşov and Constanţa today?
Braşov (AQI 57, Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Constanţa (AQI 102, Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Exercise outdoors
- Braşov
- Fine for most people; unusually sensitive people should take long or hard exercise easier.
- Constanţa
- Children, older adults and people with asthma or heart disease should cut down long or hard exercise.
Windows
- Braşov
- Fine to open; close them if you are sensitive to pollution.
- Constanţa
- Close them to keep the outside air out.
Masks
- Braşov
- Not needed for most people.
- Constanţa
- Sensitive groups: an N95 outdoors.
Air purifier
- Braşov
- Worth running if you are sensitive.
- Constanţa
- Run one, especially in bedrooms.
Against everywhere else
How do Braşov and Constanţa compare with the rest of the world?
Right now Braşov's air is cleaner than 51% of the 5,420 places Airleaf tracks, and Constanţa's is cleaner than 20%. Within Romania, that is 89% and 5% of its 20 measured places.
Cleaner air than…
- Braşov
- Beats 51%
- Constanţa
- Beats 20%
More tree cover than…
- Braşov
- Beats 80%
- Constanţa
- Beats 45%
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, Braşov or Constanţa?
Braşov has lost more: about 600 ha of forest within 10 km of its center from 2001 to 2025, against 1 ha around Constanţa. 87 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: 2011, with 94 ha lost.
Worst year: 2004, with under 1 ha lost.
| Braşov | Constanţa | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 600 ha | 1 ha (better) |
| Cleared for goodTurned into farms, mines or towns. | 87 ha | under 1 ha (better) |
| Recent trend2021–2025 against the five years before. | Too little to call | Too little to call |
| Main known cause | Logging (84%) | Towns and roads (27%) |
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.
Braşov
2017: satellite photo from August 2017 of a 5 × 5 km area about 6 km southeast of the city center.
Constanţa
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
Trees
Which has more trees, Braşov or Constanţa?
Braşov has more tree cover: 36.9% of the land within 2 km of its center against 19.3% around Constanţa, or about 115,925 trees against 59,359.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Braşov | Constanţa | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 116K (better) | 59.4K |
| Trees still neededTo reach the target. Fewer is better. | 0 (better) | 48.3K |
| CO₂ absorbed each yearBy the trees already standing. | 2.6M kg (better) | 1.3M 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
Braşov vs Constanţa: your questions answered
Is Braşov cleaner than Constanţa?
On air quality, yes, right now: Braşov reads AQI 57 against 102, 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. But over the past 6 days, on modeled daily averages, Constanţa averaged AQI 37 against 73, and it was the cleaner of the two on 6 of those days.
Is it safe to exercise outdoors in Braşov and Constanţa today?
In Braşov, at AQI 57: Unusually sensitive people should consider limiting long outdoor exertion. In Constanţa, at AQI 102: Sensitive groups should limit long or intense outdoor activity.
Which has lost more forest, Braşov or Constanţa?
Braşov has lost more: about 600 ha of forest within 10 km of its center from 2001 to 2025, against 1 ha around Constanţa. 87 ha of that was cleared for good, for farms, mines or towns.
Which has more trees, Braşov or Constanţa?
Braşov has more tree cover: 36.9% of the land within 2 km of its center against 19.3% around Constanţa, or about 115,925 trees against 59,359. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Braşov and Constanţa need?
Braşov needs about 0 more to reach its canopy target of 30%, and Constanţa about 48,287 to reach 35%. The target starts at 30% of the land and rises where air quality is poor.
Are Braşov and Constanţa 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 come from nearby ground stations. Nothing is adjusted for population, city limits or climate.
How often does the Braşov vs Constanţa 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 16, 2026 and Sep 18, 2026), and the forest figures are published yearly.
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