Air quality comparison · Ukraine, 61 km apart
Sevastopol vs Simferopol Air quality index (AQI) today
Sevastopol has cleaner air than Simferopol right now: AQI 19 (Good) against 37 (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, Sevastopol averaged AQI 23 against 31, and it was the cleaner of the two on 6 of those days. Simferopol has lost more forest since 2001. Simferopol has more tree cover.
Ukraine
AQI 19
Good
Cleaner right now
- PM2.5
- 3.3 µg/m³
- Main pollutant
- PM2.5
- Source
- Model estimate
- Reading
- Nov 10, 15:00 local
Ukraine
AQI 37
Good
Cleaner right now
- PM2.5
- 8 µg/m³
- Main pollutant
- PM2.5
- Source
- Model estimate
- Reading
- Nov 11, 13:00 local
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Sevastopol19Simferopol37
Head to head
Sevastopol vs Simferopol at a glance
Sevastopol is ahead on 4 of 6 measures, and Simferopol on 2. The better figure in each row is marked.
| Sevastopol | Simferopol | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 19 (better) | 37 |
| PM2.5Fine particles, µg/m³. | 3.3 (better) | 8 |
| Past week's averageUS AQI, 6 days. | 23 (better) | 31 |
| Forest lost since 2001Within 10 km of the center. | 63 ha (better) | 80 ha |
| Tree coverWithin 2 km of the center. | 27.3% | 36.4% (better) |
| Trees still neededTo reach a healthy canopy. | 5.9K | 0 (better) |
Air quality today
What is the air like in Sevastopol and Simferopol right now?
Sevastopol has cleaner air than Simferopol right now: AQI 19 (Good) against 37 (Good). PM2.5 is setting the index in both.
Both readings are model estimates, with no ground station close enough to either.
SevastopolSimferopol
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).
Sevastopol: Model estimate · no ground station nearby. Data: Open-Meteo / CAMS, US EPA index.
Simferopol: 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, Sevastopol averaged AQI 23 against 31, 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
- Sevastopol6Simferopol0
- Average AQI
- Sevastopol23Simferopol31
- Worst day, AQI
- Sevastopol27Simferopol36
The daily numbers (6 days)
| Day | Sevastopol | Simferopol |
|---|---|---|
| Nov 5 | 22 | 31 |
| Nov 6 | 21 | 29 |
| Nov 7 | 19 | 28 |
| Nov 8 | 25 | 36 |
| Nov 9 | 27 | 34 |
| Nov 10 | 25 | 30 |
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 Sevastopol and Simferopol 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 Sevastopol and Simferopol compare with the rest of the world?
Right now Sevastopol's air is cleaner than 89% of the 5,420 places Airleaf tracks, and Simferopol's is cleaner than 73%. Within Ukraine, that is 98% and 68% of its 42 measured places.
Cleaner air than…
- Sevastopol
- Beats 89%
- Simferopol
- Beats 73%
More tree cover than…
- Sevastopol
- Beats 63%
- Simferopol
- Beats 79%
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, Sevastopol or Simferopol?
Simferopol has lost more: about 80 ha of forest within 10 km of its center from 2001 to 2025, against 63 ha around Sevastopol. 39 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 13 ha lost.
Worst year: 2019, with 18 ha lost.
| Sevastopol | Simferopol | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 63 ha (better) | 80 ha |
| Share of its forestOf what it had in 2000. | 2.2% (better) | 2.8% |
| Cleared for goodTurned into farms, mines or towns. | 55 ha | 39 ha (better) |
| Recent trend2021–2025 against the five years before. | Too little to call | Too little to call |
| Main known cause | Farms, pasture and plantations (33%) | Towns and roads (46%) |
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.
Sevastopol
2017: satellite photo from September 2017 of a 5 × 5 km area in the city center.
Simferopol
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
Trees
Which has more trees, Sevastopol or Simferopol?
Simferopol has more tree cover: 36.4% of the land within 2 km of its center against 27.3% around Sevastopol, or about 114,354 trees against 60,036.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Sevastopol | Simferopol | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 60.0K | 114K (better) |
| Trees still neededTo reach the target. Fewer is better. | 5.9K | 0 (better) |
| CO₂ absorbed each yearBy the trees already standing. | 1.3M kg | 2.5M 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
Sevastopol vs Simferopol: your questions answered
Is Sevastopol cleaner than Simferopol?
On air quality, yes, right now: Sevastopol reads AQI 19 against 37, a gap of 18 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, Sevastopol averaged AQI 23 against 31, and it was the cleaner of the two on 6 of those days.
Is it safe to exercise outdoors in Sevastopol and Simferopol today?
The advice is the same for both today. Air quality is satisfactory for everyone. Sevastopol reads AQI 19 and Simferopol reads AQI 37.
Which has lost more forest, Sevastopol or Simferopol?
Simferopol has lost more: about 80 ha of forest within 10 km of its center from 2001 to 2025, against 63 ha around Sevastopol. 39 ha of that was cleared for good, for farms, mines or towns.
Which has more trees, Sevastopol or Simferopol?
Simferopol has more tree cover: 36.4% of the land within 2 km of its center against 27.3% around Sevastopol, or about 114,354 trees against 60,036. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Sevastopol and Simferopol need?
Sevastopol needs about 5,938 more to reach its canopy target of 30%, and Simferopol about 0 to reach 30%. The target starts at 30% of the land and rises where air quality is poor.
Are Sevastopol and Simferopol 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 Sevastopol vs Simferopol 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 17, 2026 and Sep 12, 2026), and the forest figures are published yearly.
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