Air quality comparison · Turkey, 850 km apart
Gaziantep vs Istanbul Air quality index (AQI) today
Gaziantep has cleaner air than Istanbul right now: AQI 70 (Moderate) against 76 (Moderate).
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, Gaziantep averaged AQI 57 against 78, and it was the cleaner of the two on 4 of those days. Istanbul has lost more forest since 2001. Istanbul has more tree cover.
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Gaziantep70Istanbul76
Head to head
Gaziantep vs Istanbul at a glance
Gaziantep is ahead on 4 of 6 measures, and Istanbul on 2. The better figure in each row is marked.
| Gaziantep | Istanbul | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 70 (better) | 76 |
| PM2.5Fine particles, µg/m³. | 19.2 (better) | 22.6 |
| Past week's averageUS AQI, 7 days. | 57 (better) | 78 |
| Forest lost since 2001Within 10 km of the center. | 2 ha (better) | 31 ha |
| Tree coverWithin 2 km of the center. | 4.1% | 9.2% (better) |
| Trees still neededTo reach a healthy canopy. | 81.4K | 56.9K (better) |
Air quality today
What is the air like in Gaziantep and Istanbul right now?
Gaziantep has cleaner air than Istanbul right now: AQI 70 (Moderate) against 76 (Moderate). PM2.5 is setting the index in both.
Gaziantep's PM2.5 is about 1.3× the WHO's 24-hour guideline of 15 µg/m³. Istanbul's PM2.5 is about 1.5× the WHO's 24-hour guideline of 15 µg/m³.
Both readings come from nearby ground stations.
GaziantepIstanbul
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).
Gaziantep: Ground station · Gaziantep, Turkey, 2.8 km away. Data: World Air Quality Index Project, Turkey National Air Quality Monitoring Network (Ulusal Hava Kalitesi İzleme Ağı).
Istanbul: Ground station · Istanbul (Aksaray), Turkey, 400 m away · median of 8 stations. Data: World Air Quality Index Project, Turkey National Air Quality Monitoring Network (Ulusal Hava Kalitesi İzleme Ağı).
The past week
Which had cleaner air over the past 7 days?
Over the past 7 days, on modeled daily averages, Gaziantep averaged AQI 57 against 78, and it was the cleaner of the two on 4 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
- Gaziantep4Istanbul2
- Average AQI
- Gaziantep57Istanbul78
- Worst day, AQI
- Gaziantep80Istanbul128
The daily numbers (7 days)
| Day | Gaziantep | Istanbul |
|---|---|---|
| Nov 4 | 80 | 80 |
| Nov 5 | 56 | 48 |
| Nov 6 | 62 | 56 |
| Nov 7 | 58 | 66 |
| Nov 8 | 39 | 67 |
| Nov 9 | 47 | 104 |
| Nov 10 | 58 | 128 |
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 Gaziantep and Istanbul today?
Unusually sensitive people should consider limiting long outdoor exertion. Both are in the same EPA band today (Moderate), so the advice is the same.
Exercise outdoors
Fine for most people; unusually sensitive people should take long or hard exercise easier.
Windows
Fine to open; close them if you are sensitive to pollution.
Masks
Not needed for most people.
Air purifier
Worth running if you are sensitive.
Against everywhere else
How do Gaziantep and Istanbul compare with the rest of the world?
Right now Gaziantep's air is cleaner than 38% of the 5,420 places Airleaf tracks, and Istanbul's is cleaner than 33%. Within Turkey, that is 69% and 62% of its 95 measured places.
Cleaner air than…
- Gaziantep
- Beats 38%
- Istanbul
- Beats 33%
More tree cover than…
- Gaziantep
- Beats 8%
- Istanbul
- Beats 19%
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, Gaziantep or Istanbul?
Istanbul has lost more: about 31 ha of forest within 10 km of its center from 2001 to 2025, against 2 ha around Gaziantep. 26 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: 2019, with under 1 ha lost.
Worst year: 2019, with 6 ha lost.
| Gaziantep | Istanbul | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 2 ha (better) | 31 ha |
| Cleared for goodTurned into farms, mines or towns. | under 1 ha (better) | 26 ha |
| Recent trend2021–2025 against the five years before. | Too little to call | Too little to call |
| Main known cause | Logging (58%) | Towns and roads (83%) |
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.
Gaziantep
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
Istanbul
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
Trees
Which has more trees, Gaziantep or Istanbul?
Istanbul has more tree cover: 9.2% of the land within 2 km of its center against 4.1% around Gaziantep, or about 25,145 trees against 12,881.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Gaziantep | Istanbul | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 12.9K | 25.1K (better) |
| Trees still neededTo reach the target. Fewer is better. | 81.4K | 56.9K (better) |
| CO₂ absorbed each yearBy the trees already standing. | 283K kg | 553K 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
Gaziantep vs Istanbul: your questions answered
Is Gaziantep cleaner than Istanbul?
On air quality, yes, right now: Gaziantep reads AQI 70 against 76, a gap of 6 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, Gaziantep averaged AQI 57 against 78, and it was the cleaner of the two on 4 of those days.
Is it safe to exercise outdoors in Gaziantep and Istanbul today?
The advice is the same for both today. Unusually sensitive people should consider limiting long outdoor exertion. Gaziantep reads AQI 70 and Istanbul reads AQI 76.
Which has lost more forest, Gaziantep or Istanbul?
Istanbul has lost more: about 31 ha of forest within 10 km of its center from 2001 to 2025, against 2 ha around Gaziantep. 26 ha of that was cleared for good, for farms, mines or towns.
Which has more trees, Gaziantep or Istanbul?
Istanbul has more tree cover: 9.2% of the land within 2 km of its center against 4.1% around Gaziantep, or about 25,145 trees against 12,881. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Gaziantep and Istanbul need?
Gaziantep needs about 81,367 more to reach its canopy target of 30%, and Istanbul about 56,850 to reach 30%. The target starts at 30% of the land and rises where air quality is poor.
Are Gaziantep and Istanbul 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 Gaziantep vs Istanbul 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 12, 2026), and the forest figures are published yearly.
Keep going
Compare them with somewhere else
Build your own
Compare Gaziantep with somewhere else
This place
Gaziantep