SmogRank / Turkey / Istanbul

Air quality in Istanbul

Istanbul, Turkey. PM2.5 from 7 low-cost sensors, updated hourly.

51.8 µg/m³
Unhealthy for sensitive groups

Latest hour (06:00 UTC), 3.5× the WHO 24-hour guideline.

Rank

24 h
–
not enough data
7 days
#149
of 2,330 · 20.9 µg/m³
30 days
#124
of 2,327 · 24.0 µg/m³
Year
#191
of 2,160 · 23.6 µg/m³

Why it ranks here

Seasonal. Over the past year its worst months were January, July, August, November, December, averaging up to 32.2 µg/m³ against 15.9 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

Based on Istanbul's own measurements; causes are the usual kinds for a pattern like this, not a confirmed source.

Last 4 days, hour by hour

15522026-10-01 00:00 UTC: 15.2 µg/m³2026-10-01 01:00 UTC: 17.9 µg/m³2026-10-01 02:00 UTC: 15.4 µg/m³2026-10-01 03:00 UTC: 17.3 µg/m³2026-10-01 04:00 UTC: 16.5 µg/m³2026-10-01 05:00 UTC: 18.5 µg/m³2026-10-01 06:00 UTC: 51.8 µg/m³Sep 28Sep 29Sep 30Oct 1

Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Every day for a year

SepNovDecJanFebMarAprMayJunJulAugSepMonWedFri2025-09-29: 28.0 µg/m³2025-09-30: 22.7 µg/m³2025-10-01: 20.4 µg/m³2025-10-02: 19.8 µg/m³2025-10-03: 24.8 µg/m³2025-10-04: 22.5 µg/m³2025-10-05: 19.8 µg/m³2025-10-06: 20.8 µg/m³2025-10-07: 29.2 µg/m³2025-10-08: 23.1 µg/m³2025-10-09: 23.6 µg/m³2025-10-10: 22.7 µg/m³2025-10-11: 25.5 µg/m³2025-10-12: 25.4 µg/m³2025-10-13: 23.5 µg/m³2025-10-14: 24.2 µg/m³2025-10-15: 23.2 µg/m³2025-10-16: 24.1 µg/m³2025-10-17: 23.5 µg/m³2025-10-18: 31.5 µg/m³2025-10-19: 29.5 µg/m³2025-10-20: 21.2 µg/m³2025-10-21: 19.4 µg/m³2025-10-22: 28.4 µg/m³2025-10-23: 30.0 µg/m³2025-10-24: 25.0 µg/m³2025-10-25: 24.3 µg/m³2025-10-26: 24.5 µg/m³2025-10-27: 21.4 µg/m³2025-10-28: 26.1 µg/m³2025-10-29: 24.2 µg/m³2025-10-30: 30.2 µg/m³2025-10-31: 31.3 µg/m³2025-11-01: 37.9 µg/m³2025-11-02: 26.8 µg/m³2025-11-03: 50.4 µg/m³2025-11-04: 53.8 µg/m³2025-11-05: 31.6 µg/m³2025-11-06: 31.3 µg/m³2025-11-07: 36.4 µg/m³2025-11-08: 40.4 µg/m³2025-11-09: 39.3 µg/m³2025-11-10: 38.0 µg/m³2025-11-11: 27.8 µg/m³2025-11-12: 26.0 µg/m³2025-11-13: 27.4 µg/m³2025-11-14: 35.2 µg/m³2025-11-15: 32.1 µg/m³2025-11-16: 31.5 µg/m³2025-11-17: 24.3 µg/m³2025-11-18: 22.3 µg/m³2025-11-19: 26.9 µg/m³2025-11-20: 34.0 µg/m³2025-11-21: 30.4 µg/m³2025-11-22: 33.7 µg/m³2025-11-23: 33.8 µg/m³2025-11-24: 26.5 µg/m³2025-11-25: 26.6 µg/m³2025-11-26: 24.1 µg/m³2025-11-27: 27.4 µg/m³2025-11-28: 29.0 µg/m³2025-11-29: 32.1 µg/m³2025-11-30: 29.0 µg/m³2025-12-01: 33.4 µg/m³2025-12-02: 40.9 µg/m³2025-12-03: 36.0 µg/m³2025-12-04: 37.5 µg/m³2025-12-05: 30.2 µg/m³2025-12-06: 21.3 µg/m³2025-12-07: 32.4 µg/m³2025-12-08: 28.8 µg/m³2025-12-09: 26.9 µg/m³2025-12-10: 25.6 µg/m³2025-12-11: 29.4 µg/m³2025-12-12: 38.1 µg/m³2025-12-13: 29.1 µg/m³2025-12-14: 27.5 µg/m³2025-12-15: 27.4 µg/m³2025-12-16: 33.6 µg/m³2025-12-17: 30.9 µg/m³2025-12-18: 33.9 µg/m³2025-12-19: 44.5 µg/m³2025-12-20: 36.4 µg/m³2025-12-21: 37.0 µg/m³2025-12-22: 43.2 µg/m³2025-12-23: 31.1 µg/m³2025-12-24: 37.8 µg/m³2025-12-25: 32.6 µg/m³2025-12-26: 25.4 µg/m³2025-12-27: 24.6 µg/m³2025-12-28: 25.4 µg/m³2025-12-29: 18.0 µg/m³2025-12-30: 22.2 µg/m³2025-12-31: 22.0 µg/m³2026-01-01: 22.9 µg/m³2026-01-02: 17.0 µg/m³2026-01-03: 21.8 µg/m³2026-01-04: 25.8 µg/m³2026-01-05: 22.2 µg/m³2026-01-06: 22.8 µg/m³2026-01-07: 25.7 µg/m³2026-01-08: 27.5 µg/m³2026-01-09: 20.5 µg/m³2026-01-10: 23.5 µg/m³2026-01-11: 30.9 µg/m³2026-01-12: 25.4 µg/m³2026-01-13: 18.6 µg/m³2026-01-14: 24.5 µg/m³2026-01-15: 25.6 µg/m³2026-01-16: 31.9 µg/m³2026-01-17: 29.3 µg/m³2026-01-18: 29.2 µg/m³2026-01-19: 32.8 µg/m³2026-01-20: 25.6 µg/m³2026-01-21: 25.6 µg/m³2026-01-22: 23.6 µg/m³2026-01-23: 37.6 µg/m³2026-01-24: 42.7 µg/m³2026-01-25: 41.1 µg/m³2026-01-26: 30.2 µg/m³2026-01-27: 22.2 µg/m³2026-01-28: 26.3 µg/m³2026-01-29: 21.5 µg/m³2026-01-30: 25.2 µg/m³2026-01-31: 31.3 µg/m³2026-02-01: 29.3 µg/m³2026-02-02: 30.1 µg/m³2026-02-03: 27.4 µg/m³2026-02-04: 32.5 µg/m³2026-02-05: 21.4 µg/m³2026-02-06: 22.9 µg/m³2026-02-07: no data2026-02-08: 40.3 µg/m³2026-02-09: 20.2 µg/m³2026-02-10: 13.2 µg/m³2026-02-11: 15.9 µg/m³2026-02-12: 15.7 µg/m³2026-02-13: 16.9 µg/m³2026-02-14: 15.9 µg/m³2026-02-15: 21.8 µg/m³2026-02-16: 26.8 µg/m³2026-02-17: 17.8 µg/m³2026-02-18: 10.2 µg/m³2026-02-19: 12.4 µg/m³2026-02-20: 16.1 µg/m³2026-02-21: 21.0 µg/m³2026-02-22: 16.6 µg/m³2026-02-23: no data2026-02-24: no data2026-02-25: 14.7 µg/m³2026-02-26: 16.6 µg/m³2026-02-27: 17.1 µg/m³2026-02-28: 17.7 µg/m³2026-03-01: 17.5 µg/m³2026-03-02: 23.1 µg/m³2026-03-03: 29.6 µg/m³2026-03-04: 30.9 µg/m³2026-03-05: 34.2 µg/m³2026-03-06: 31.5 µg/m³2026-03-07: 15.9 µg/m³2026-03-08: 14.6 µg/m³2026-03-09: 15.2 µg/m³2026-03-10: no data2026-03-11: no data2026-03-12: no data2026-03-13: no data2026-03-14: no data2026-03-15: no data2026-03-16: no data2026-03-17: no data2026-03-18: no data2026-03-19: no data2026-03-20: no data2026-03-21: no data2026-03-22: no data2026-03-23: no data2026-03-24: no data2026-03-25: no data2026-03-26: no data2026-03-27: 20.5 µg/m³2026-03-28: 14.9 µg/m³2026-03-29: 12.9 µg/m³2026-03-30: 14.7 µg/m³2026-03-31: 17.3 µg/m³2026-04-01: 18.7 µg/m³2026-04-02: 18.6 µg/m³2026-04-03: 16.5 µg/m³2026-04-04: 20.2 µg/m³2026-04-05: 19.8 µg/m³2026-04-06: 22.7 µg/m³2026-04-07: 22.6 µg/m³2026-04-08: 15.8 µg/m³2026-04-09: 9.5 µg/m³2026-04-10: 9.4 µg/m³2026-04-11: 11.7 µg/m³2026-04-12: 10.1 µg/m³2026-04-13: 9.6 µg/m³2026-04-14: 12.1 µg/m³2026-04-15: 14.3 µg/m³2026-04-16: 14.8 µg/m³2026-04-17: 15.7 µg/m³2026-04-18: 15.7 µg/m³2026-04-19: 20.6 µg/m³2026-04-20: 16.8 µg/m³2026-04-21: 18.1 µg/m³2026-04-22: 13.0 µg/m³2026-04-23: 12.2 µg/m³2026-04-24: 16.8 µg/m³2026-04-25: 26.8 µg/m³2026-04-26: 21.7 µg/m³2026-04-27: 13.6 µg/m³2026-04-28: 10.9 µg/m³2026-04-29: 13.4 µg/m³2026-04-30: 13.8 µg/m³2026-05-01: 12.2 µg/m³2026-05-02: 9.3 µg/m³2026-05-03: 11.3 µg/m³2026-05-04: 12.1 µg/m³2026-05-05: 14.7 µg/m³2026-05-06: 18.1 µg/m³2026-05-07: 20.4 µg/m³2026-05-08: 22.0 µg/m³2026-05-09: 23.2 µg/m³2026-05-10: 26.2 µg/m³2026-05-11: 23.9 µg/m³2026-05-12: 27.8 µg/m³2026-05-13: 22.0 µg/m³2026-05-14: 14.7 µg/m³2026-05-15: 20.5 µg/m³2026-05-16: 19.5 µg/m³2026-05-17: 19.7 µg/m³2026-05-18: 19.2 µg/m³2026-05-19: 25.9 µg/m³2026-05-20: 22.1 µg/m³2026-05-21: 27.6 µg/m³2026-05-22: 27.5 µg/m³2026-05-23: 25.8 µg/m³2026-05-24: 21.5 µg/m³2026-05-25: 22.2 µg/m³2026-05-26: 22.0 µg/m³2026-05-27: 21.4 µg/m³2026-05-28: 23.2 µg/m³2026-05-29: 17.7 µg/m³2026-05-30: no data2026-05-31: 20.6 µg/m³2026-06-01: 23.4 µg/m³2026-06-02: 25.8 µg/m³2026-06-03: 25.6 µg/m³2026-06-04: 25.9 µg/m³2026-06-05: 26.8 µg/m³2026-06-06: 26.8 µg/m³2026-06-07: 26.3 µg/m³2026-06-08: 24.9 µg/m³2026-06-09: 24.5 µg/m³2026-06-10: 24.9 µg/m³2026-06-11: 26.4 µg/m³2026-06-12: 25.6 µg/m³2026-06-13: 22.2 µg/m³2026-06-14: 21.3 µg/m³2026-06-15: 22.6 µg/m³2026-06-16: 25.1 µg/m³2026-06-17: 25.4 µg/m³2026-06-18: 23.6 µg/m³2026-06-19: 23.6 µg/m³2026-06-20: 24.4 µg/m³2026-06-21: 25.0 µg/m³2026-06-22: 25.7 µg/m³2026-06-23: 24.9 µg/m³2026-06-24: 25.5 µg/m³2026-06-25: 29.4 µg/m³2026-06-26: 29.1 µg/m³2026-06-27: 29.1 µg/m³2026-06-28: 25.4 µg/m³2026-06-29: 27.2 µg/m³2026-06-30: 28.7 µg/m³2026-07-01: 30.3 µg/m³2026-07-02: 30.9 µg/m³2026-07-03: 30.5 µg/m³2026-07-04: 29.3 µg/m³2026-07-05: 25.1 µg/m³2026-07-06: 22.8 µg/m³2026-07-07: 23.1 µg/m³2026-07-08: 24.0 µg/m³2026-07-09: 24.5 µg/m³2026-07-10: 24.3 µg/m³2026-07-11: 23.8 µg/m³2026-07-12: 23.1 µg/m³2026-07-13: 25.9 µg/m³2026-07-14: 25.1 µg/m³2026-07-15: 27.6 µg/m³2026-07-16: 27.9 µg/m³2026-07-17: 29.4 µg/m³2026-07-18: 30.1 µg/m³2026-07-19: 29.0 µg/m³2026-07-20: 28.6 µg/m³2026-07-21: 28.5 µg/m³2026-07-22: 29.3 µg/m³2026-07-23: 23.9 µg/m³2026-07-24: 23.0 µg/m³2026-07-25: 22.8 µg/m³2026-07-26: 25.4 µg/m³2026-07-27: 25.7 µg/m³2026-07-28: 29.8 µg/m³2026-07-29: 26.5 µg/m³2026-07-30: 23.3 µg/m³2026-07-31: 25.1 µg/m³2026-08-01: 26.8 µg/m³2026-08-02: 28.7 µg/m³2026-08-03: 31.0 µg/m³2026-08-04: 31.0 µg/m³2026-08-05: 31.2 µg/m³2026-08-06: 31.2 µg/m³2026-08-07: 31.4 µg/m³2026-08-08: 33.2 µg/m³2026-08-09: 33.2 µg/m³2026-08-10: 31.9 µg/m³2026-08-11: 31.4 µg/m³2026-08-12: 32.2 µg/m³2026-08-13: 32.3 µg/m³2026-08-14: 25.6 µg/m³2026-08-15: 24.5 µg/m³2026-08-16: 24.4 µg/m³2026-08-17: 26.4 µg/m³2026-08-18: 27.3 µg/m³2026-08-19: 29.6 µg/m³2026-08-20: 29.4 µg/m³2026-08-21: 29.9 µg/m³2026-08-22: 30.5 µg/m³2026-08-23: 29.9 µg/m³2026-08-24: 31.8 µg/m³2026-08-25: 32.6 µg/m³2026-08-26: 33.8 µg/m³2026-08-27: 30.6 µg/m³2026-08-28: 27.0 µg/m³2026-08-29: 26.2 µg/m³2026-08-30: 29.4 µg/m³2026-08-31: 29.0 µg/m³2026-09-01: 28.0 µg/m³2026-09-02: 27.8 µg/m³2026-09-03: 27.5 µg/m³2026-09-04: 27.4 µg/m³2026-09-05: 28.6 µg/m³2026-09-06: 28.2 µg/m³2026-09-07: 25.0 µg/m³2026-09-08: no data2026-09-09: 22.8 µg/m³2026-09-10: 26.6 µg/m³2026-09-11: 26.3 µg/m³2026-09-12: 26.7 µg/m³2026-09-13: 25.1 µg/m³2026-09-14: 21.9 µg/m³2026-09-15: 21.9 µg/m³2026-09-16: 21.9 µg/m³2026-09-17: 22.9 µg/m³2026-09-18: 23.0 µg/m³2026-09-19: 23.4 µg/m³2026-09-20: 24.1 µg/m³2026-09-21: 27.6 µg/m³2026-09-22: 23.6 µg/m³2026-09-23: 18.5 µg/m³2026-09-24: 19.1 µg/m³2026-09-25: 19.0 µg/m³2026-09-26: 21.8 µg/m³2026-09-27: 21.6 µg/m³2026-09-28: 22.2 µg/m³2026-09-29: 22.4 µg/m³2026-09-30: 20.5 µg/m³
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

315 of 343 measured days were over the WHO 24-hour guideline.

Daily world rank

#1#1058OctNovDecJanFebMarAprMayJunJulAugSep

Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15Jan 2025: 34.8 µg/m³Jan 2026: 26.8 µg/m³JanFeb 2025: 31.6 µg/m³Feb 2026: 20.4 µg/m³FebMar 2025: 31.4 µg/m³Mar 2026: 20.9 µg/m³MarApr 2025: 29.0 µg/m³Apr 2026: 15.9 µg/m³AprMay 2025: 22.9 µg/m³May 2026: 20.5 µg/m³MayJun 2025: 25.3 µg/m³Jun 2026: 25.5 µg/m³JunJul 2025: 25.8 µg/m³Jul 2026: 26.4 µg/m³JulAug 2025: 35.3 µg/m³Aug 2026: 29.8 µg/m³AugSep 2025: 39.8 µg/m³Sep 2026: 24.0 µg/m³SepOct 2025: 24.6 µg/m³OctNov 2025: 32.2 µg/m³NovDec 2025: 31.1 µg/m³Dec

Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 20.9 µg/m³20.920252025: 21.2 µg/m³21.2

Mean PM2.5 for 24 Sept to 30 Sept in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
KadikoyB-5 - airQuality_sorsCC BY 4.0Kadıköy MunicipalityLow-cost
KadikoyB-4 - airQuality_forsCC BY 4.0Kadıköy MunicipalityLow-cost
KadikoyB-8 - airQuality_glisCC BY 4.0Kadıköy MunicipalityLow-cost
KadikoyB-6 - airQuality_secoCC BY 4.0Kadıköy MunicipalityLow-cost
KadikoyB-2 - airQuality_duisCC BY 4.0Kadıköy MunicipalityLow-cost
KadikoyB-7 - airQuality_sonsCC BY 4.0Kadıköy MunicipalityLow-cost
KadikoyB-1 - airQuality_miraCC BY 4.0Kadıköy MunicipalityLow-cost

No reference monitor here, so the value is the median of low-cost sensors (at least two reporting each hour). Low-cost sensors can read high in humid air. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Updated 2026-10-01 06:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.