Ankara Air Quality
Ankara, Turkey · 5.7M population · Capital at 938m altitude
Moderate
2024 avg
88
Annual AQI
2024 average
26 μg/m³
PM2.5
5.2× WHO annual limit
138
Winter Peak AQI
January average
Jul
Best Month
AQI 55 summer
Monthly AQI Pattern
Strong seasonal pattern: clean summers (Jun–Aug AQI 55–65) vs. coal heating winters (Nov–Feb AQI 112–138)
Ankara's Air Quality: Geography and Heating
Basin Trap Geography
Ankara sits in a natural basin surrounded by the Kızılcahamam, Beypazarı, and Polatlı hills on the Central Anatolian Plateau. At 938m elevation, the city experiences cold winters with frequent temperature inversions — warm air layers that sit above cold ground- level air, acting as a lid that prevents pollutants from dispersing upward. During inversion events, which are most common from November to February, PM2.5 concentrations can triple within hours and remain elevated for days.
Coal & Natural Gas Heating Transition
Ankara's transformation from one of Turkey's most coal-dependent cities to 95%+ natural gas penetration is a success story in urban air quality. In the 1990s, Ankara's winter air was thick with coal smoke (kömür dumanı). Subsidized natural gas conversion programs over two decades largely eliminated residential coal burning in formal neighborhoods. Remaining coal use is concentrated in peripheral gecekondu (informal housing) areas and some small industrial users.
Vehicle Emissions: 5M+ Registered Vehicles
Ankara province has over 5 million registered vehicles for a city of 5.7M people — one of the highest rates in Turkey. The city's planned, radial road structure encourages car dependency. The Ankara Metro (EGO) operates 5 lines covering 75km, and the AnkART light rail supplements this. Despite these alternatives, vehicle modal share remains high. Euro 5/6 fuel standards have significantly reduced per-vehicle emissions since 2015, but total vehicle numbers continue growing.
Industrial Zones: Ostim & Sincan
Ankara's industrial zones — particularly OSTİM (Orta Sanayi) and Sincan–Eryaman industrial districts — house metalworking, defense manufacturing, auto parts, and light manufacturing. These zones generate localized PM2.5 and NOx. The government has been relocating polluting industry outside the basin since the 2000s. Ankara's largest employer, the Turkish defense industry (ASELSAN, ROKETSAN, TAI), operates modern facilities with strict emission controls.
Turkey City AQI Comparison
| City | Annual AQI | PM2.5 μg/m³ | Key Factor |
|---|---|---|---|
| Ankara | 88 | 26 | Basin trap, heating |
| Istanbul | 72 | 20 | Coastal breezes help |
| Bursa | 95 | 28 | Industry + basin |
| İzmir | 65 | 18 | Aegean coast advantage |
| Konya | 82 | 22 | Plateau dust + heating |
Health Guide for Ankara Residents
Winter (Nov–Feb, AQI 112–138)
- Avoid early morning outdoor exercise (inversions peak at dawn)
- N95 mask recommended for morning commutes
- Run HEPA air purifier at home during inversion events
- Keep windows closed from 6am–10am on cold still mornings
- Children, elderly, and asthma patients: limit outdoor time when AQI >100
Summer (Jun–Aug, AQI 55–65)
- Ankara's summers are the best time for outdoor exercise
- Early morning runs are excellent June–August
- METU (ODTÜ) campus and Atatürk Forest Farm provide green exercise zones
- Hot July–August: exercise before 8am to avoid heat + ozone peak
Frequently Asked Questions
Why is Ankara's winter air quality poor?
Ankara's severe winter pollution is caused by a combination of geography and fuel burning: (1) The city sits in an enclosed basin on the Central Anatolian Plateau at 938m elevation, with surrounding hills trapping cold air and pollutants in winter temperature inversions; (2) Coal and lignite burning for residential heating — Turkey is a major coal consumer and Ankara's colder winters (averaging 0°C in January) drive high heating demand; (3) High vehicle density in a 5.7M city with still-developing metro system. Winter AQI regularly exceeds 130–150 from November to February.
How does Ankara compare to Istanbul for air quality?
Ankara generally has worse winter air quality than Istanbul but better summer air quality. Istanbul benefits from its coastal location (Bosphorus, Sea of Marmara, Black Sea) which provides consistent sea breezes to disperse pollutants. Ankara's inland plateau location means inversions trap winter pollution more severely. Istanbul annual AQI averages around 72, while Ankara averages around 88. In summer, both cities are fairly clean. Istanbul has higher vehicle density but better natural ventilation.
Is Ankara's air quality improving?
Yes — Ankara has seen significant improvement over the past two decades. In the 1990s and 2000s, Ankara was one of Turkey's most polluted cities, with severe 'kömür dumanı' (coal smoke) episodes. The shift from raw coal to natural gas for household heating was a major turning point; Ankara's natural gas penetration now exceeds 95% of urban households. Remaining coal burning is primarily in gecekondu (informal settlement) areas and some industrial zones. Ankara Metro expansion (current network: 5 lines, 75km) has also helped reduce vehicle emissions.
What is the best season to visit Ankara for air quality?
June through August offers Ankara's best air quality, with AQI typically 55–65 (Good to Moderate). The warm, dry summer months have minimal heating emissions, favorable convection currents that ventilate the basin, and fewer temperature inversions. Spring (April–May) and early autumn (September) are also good. Avoid November through February for outdoor activities if sensitive to air quality — these months see AQI regularly exceeding 100–150.
What government measures exist to address Ankara's air pollution?
Turkey's environment ministry and Ankara Metropolitan Municipality have implemented multiple measures: natural gas conversion subsidies accelerating household transitions from coal, Low Emission Zone (Düşük Emisyon Bölgesi) designations in central Ankara restricting older vehicles, expansion of the Ankara Metro network (EGO Metro), and air quality monitoring via the National Air Quality Monitoring Network (THMM). Turkey ratified the Paris Agreement in 2021, adding federal pressure on air quality improvement.