SmogRank / Hungary / Hajdú-Bihar

Air quality in Debrecen

Hajdú-Bihar, Hungary. PM2.5 from 7 low-cost sensors, updated hourly.

9.1 µg/m³
Moderate

Latest hour (12:00 UTC), 0.6× the WHO 24-hour guideline.

Rank

24 h
–
not enough data
7 days
#305
of 2,333 · 13.2 µg/m³
30 days
#620
of 2,331 · 8.0 µg/m³
Year
#232
of 2,173 · 19.7 µg/m³

Why it ranks here

Seasonal. Over the past year its worst months were January, averaging up to 52.7 µg/m³ against 7.6 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

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

Last 4 days, hour by hour

15302026-10-01 00:00 UTC: 8.8 µg/m³2026-10-01 01:00 UTC: 8.5 µg/m³2026-10-01 02:00 UTC: 8.6 µg/m³2026-10-01 03:00 UTC: 8.8 µg/m³2026-10-01 04:00 UTC: 9.9 µg/m³2026-10-01 05:00 UTC: 14.7 µg/m³2026-10-01 06:00 UTC: 16.6 µg/m³2026-10-01 07:00 UTC: 15.7 µg/m³2026-10-01 08:00 UTC: 17.2 µg/m³2026-10-01 09:00 UTC: 14.5 µg/m³2026-10-01 10:00 UTC: 11.0 µg/m³2026-10-01 12:00 UTC: 9.1 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: 4.8 µg/m³2025-09-30: 5.5 µg/m³2025-10-01: 3.4 µg/m³2025-10-02: 14.5 µg/m³2025-10-03: 12.1 µg/m³2025-10-04: 18.0 µg/m³2025-10-05: 42.5 µg/m³2025-10-06: 45.5 µg/m³2025-10-07: 25.0 µg/m³2025-10-08: 11.8 µg/m³2025-10-09: 14.8 µg/m³2025-10-10: 25.3 µg/m³2025-10-11: 13.5 µg/m³2025-10-12: 12.1 µg/m³2025-10-13: 13.9 µg/m³2025-10-14: 17.6 µg/m³2025-10-15: 24.0 µg/m³2025-10-16: 32.2 µg/m³2025-10-17: 39.9 µg/m³2025-10-18: 27.9 µg/m³2025-10-19: 26.6 µg/m³2025-10-20: 27.3 µg/m³2025-10-21: 32.3 µg/m³2025-10-22: 35.0 µg/m³2025-10-23: 23.7 µg/m³2025-10-24: 7.4 µg/m³2025-10-25: 3.9 µg/m³2025-10-26: 20.1 µg/m³2025-10-27: 3.5 µg/m³2025-10-28: 5.3 µg/m³2025-10-29: 9.4 µg/m³2025-10-30: 4.1 µg/m³2025-10-31: 19.7 µg/m³2025-11-01: 27.8 µg/m³2025-11-02: 36.3 µg/m³2025-11-03: 16.7 µg/m³2025-11-04: 15.7 µg/m³2025-11-05: 44.2 µg/m³2025-11-06: 43.6 µg/m³2025-11-07: 29.9 µg/m³2025-11-08: 46.5 µg/m³2025-11-09: 31.5 µg/m³2025-11-10: 22.6 µg/m³2025-11-11: 30.1 µg/m³2025-11-12: 38.4 µg/m³2025-11-13: 43.0 µg/m³2025-11-14: no data2025-11-15: 60.8 µg/m³2025-11-16: 45.6 µg/m³2025-11-17: 13.3 µg/m³2025-11-18: 21.5 µg/m³2025-11-19: 43.9 µg/m³2025-11-20: 42.0 µg/m³2025-11-21: 18.8 µg/m³2025-11-22: 5.8 µg/m³2025-11-23: 21.5 µg/m³2025-11-24: 27.5 µg/m³2025-11-25: 16.9 µg/m³2025-11-26: 17.4 µg/m³2025-11-27: 15.2 µg/m³2025-11-28: 25.7 µg/m³2025-11-29: 40.6 µg/m³2025-11-30: 53.4 µg/m³2025-12-01: 52.2 µg/m³2025-12-02: 44.7 µg/m³2025-12-03: 33.2 µg/m³2025-12-04: 36.3 µg/m³2025-12-05: 26.1 µg/m³2025-12-06: 29.9 µg/m³2025-12-07: 54.1 µg/m³2025-12-08: 38.2 µg/m³2025-12-09: 36.3 µg/m³2025-12-10: 42.9 µg/m³2025-12-11: 36.6 µg/m³2025-12-12: 18.0 µg/m³2025-12-13: 23.0 µg/m³2025-12-14: 23.5 µg/m³2025-12-15: 24.0 µg/m³2025-12-16: 51.0 µg/m³2025-12-17: 96.7 µg/m³2025-12-18: 84.7 µg/m³2025-12-19: 69.7 µg/m³2025-12-20: 58.8 µg/m³2025-12-21: 43.8 µg/m³2025-12-22: 45.7 µg/m³2025-12-23: 31.9 µg/m³2025-12-24: 5.6 µg/m³2025-12-25: 14.4 µg/m³2025-12-26: 41.5 µg/m³2025-12-27: 47.0 µg/m³2025-12-28: 26.9 µg/m³2025-12-29: 33.4 µg/m³2025-12-30: 38.2 µg/m³2025-12-31: 12.6 µg/m³2026-01-01: 20.5 µg/m³2026-01-02: 11.7 µg/m³2026-01-03: 13.6 µg/m³2026-01-04: 39.8 µg/m³2026-01-05: 45.9 µg/m³2026-01-06: 51.3 µg/m³2026-01-07: 42.7 µg/m³2026-01-08: 57.1 µg/m³2026-01-09: 66.4 µg/m³2026-01-10: 58.8 µg/m³2026-01-11: 43.4 µg/m³2026-01-12: 43.4 µg/m³2026-01-13: 56.3 µg/m³2026-01-14: 75.3 µg/m³2026-01-15: 72.2 µg/m³2026-01-16: 60.3 µg/m³2026-01-17: 35.2 µg/m³2026-01-18: 58.6 µg/m³2026-01-19: 52.2 µg/m³2026-01-20: 76.2 µg/m³2026-01-21: 125.0 µg/m³2026-01-22: 96.6 µg/m³2026-01-23: 77.9 µg/m³2026-01-24: 78.7 µg/m³2026-01-25: 58.6 µg/m³2026-01-26: 52.6 µg/m³2026-01-27: 41.6 µg/m³2026-01-28: 32.9 µg/m³2026-01-29: 25.1 µg/m³2026-01-30: 31.7 µg/m³2026-01-31: 33.0 µg/m³2026-02-01: 43.2 µg/m³2026-02-02: 42.0 µg/m³2026-02-03: 36.5 µg/m³2026-02-04: 37.1 µg/m³2026-02-05: 34.9 µg/m³2026-02-06: 49.3 µg/m³2026-02-07: 45.4 µg/m³2026-02-08: 55.5 µg/m³2026-02-09: 36.2 µg/m³2026-02-10: 31.0 µg/m³2026-02-11: 22.8 µg/m³2026-02-12: 16.5 µg/m³2026-02-13: 22.0 µg/m³2026-02-14: 23.7 µg/m³2026-02-15: 29.5 µg/m³2026-02-16: 44.2 µg/m³2026-02-17: 50.1 µg/m³2026-02-18: 31.8 µg/m³2026-02-19: 19.9 µg/m³2026-02-20: 25.3 µg/m³2026-02-21: 38.7 µg/m³2026-02-22: 44.9 µg/m³2026-02-23: 31.1 µg/m³2026-02-24: 8.6 µg/m³2026-02-25: 16.4 µg/m³2026-02-26: 17.4 µg/m³2026-02-27: 45.0 µg/m³2026-02-28: 58.2 µg/m³2026-03-01: 53.1 µg/m³2026-03-02: 60.6 µg/m³2026-03-03: 30.6 µg/m³2026-03-04: 56.4 µg/m³2026-03-05: 32.2 µg/m³2026-03-06: 19.5 µg/m³2026-03-07: 40.3 µg/m³2026-03-08: 41.0 µg/m³2026-03-09: 36.6 µg/m³2026-03-10: 35.3 µg/m³2026-03-11: 28.6 µg/m³2026-03-12: 28.8 µg/m³2026-03-13: 44.1 µg/m³2026-03-14: 39.6 µg/m³2026-03-15: 24.7 µg/m³2026-03-16: 31.1 µg/m³2026-03-17: 33.5 µg/m³2026-03-18: 24.5 µg/m³2026-03-19: 10.3 µg/m³2026-03-20: 20.0 µg/m³2026-03-21: 34.3 µg/m³2026-03-22: 19.4 µg/m³2026-03-23: 24.5 µg/m³2026-03-24: 33.2 µg/m³2026-03-25: 39.4 µg/m³2026-03-26: 29.6 µg/m³2026-03-27: 15.9 µg/m³2026-03-28: 29.1 µg/m³2026-03-29: 45.3 µg/m³2026-03-30: 39.6 µg/m³2026-03-31: 37.6 µg/m³2026-04-01: 12.6 µg/m³2026-04-02: 27.0 µg/m³2026-04-03: 19.0 µg/m³2026-04-04: 15.6 µg/m³2026-04-05: 12.8 µg/m³2026-04-06: 10.3 µg/m³2026-04-07: 3.7 µg/m³2026-04-08: 5.1 µg/m³2026-04-09: 14.5 µg/m³2026-04-10: 18.6 µg/m³2026-04-11: 30.2 µg/m³2026-04-12: 28.6 µg/m³2026-04-13: 20.1 µg/m³2026-04-14: 15.1 µg/m³2026-04-15: 24.1 µg/m³2026-04-16: 28.1 µg/m³2026-04-17: 27.6 µg/m³2026-04-18: 9.5 µg/m³2026-04-19: 12.2 µg/m³2026-04-20: 10.5 µg/m³2026-04-21: 8.4 µg/m³2026-04-22: 11.0 µg/m³2026-04-23: 9.8 µg/m³2026-04-24: 10.6 µg/m³2026-04-25: 11.5 µg/m³2026-04-26: 4.5 µg/m³2026-04-27: 5.8 µg/m³2026-04-28: 8.4 µg/m³2026-04-29: 1.7 µg/m³2026-04-30: 4.3 µg/m³2026-05-01: 11.4 µg/m³2026-05-02: 10.3 µg/m³2026-05-03: 6.8 µg/m³2026-05-04: 9.0 µg/m³2026-05-05: 4.9 µg/m³2026-05-06: 4.8 µg/m³2026-05-07: 6.6 µg/m³2026-05-08: 12.5 µg/m³2026-05-09: 15.7 µg/m³2026-05-10: 15.6 µg/m³2026-05-11: 12.3 µg/m³2026-05-12: 3.9 µg/m³2026-05-13: 3.5 µg/m³2026-05-14: 8.3 µg/m³2026-05-15: 5.4 µg/m³2026-05-16: 6.0 µg/m³2026-05-17: 5.2 µg/m³2026-05-18: 15.8 µg/m³2026-05-19: 14.5 µg/m³2026-05-20: 14.6 µg/m³2026-05-21: 13.3 µg/m³2026-05-22: 8.4 µg/m³2026-05-23: 9.1 µg/m³2026-05-24: 4.8 µg/m³2026-05-25: 9.1 µg/m³2026-05-26: 2.4 µg/m³2026-05-27: 5.1 µg/m³2026-05-28: 0.9 µg/m³2026-05-29: 1.3 µg/m³2026-05-30: 3.4 µg/m³2026-05-31: 8.0 µg/m³2026-06-01: 11.8 µg/m³2026-06-02: 7.8 µg/m³2026-06-03: 8.1 µg/m³2026-06-04: 11.5 µg/m³2026-06-05: 8.9 µg/m³2026-06-06: 4.4 µg/m³2026-06-07: 5.3 µg/m³2026-06-08: 4.2 µg/m³2026-06-09: 4.8 µg/m³2026-06-10: 9.4 µg/m³2026-06-11: 3.0 µg/m³2026-06-12: 4.6 µg/m³2026-06-13: 4.2 µg/m³2026-06-14: 2.9 µg/m³2026-06-15: 3.5 µg/m³2026-06-16: 3.0 µg/m³2026-06-17: 4.0 µg/m³2026-06-18: 7.6 µg/m³2026-06-19: 13.1 µg/m³2026-06-20: 16.9 µg/m³2026-06-21: 18.7 µg/m³2026-06-22: 15.7 µg/m³2026-06-23: 12.6 µg/m³2026-06-24: 7.0 µg/m³2026-06-25: 6.5 µg/m³2026-06-26: 10.8 µg/m³2026-06-27: 17.7 µg/m³2026-06-28: 17.7 µg/m³2026-06-29: 24.7 µg/m³2026-06-30: 26.5 µg/m³2026-07-01: 17.3 µg/m³2026-07-02: 12.1 µg/m³2026-07-03: 7.3 µg/m³2026-07-04: 2.2 µg/m³2026-07-05: 4.4 µg/m³2026-07-06: 3.2 µg/m³2026-07-07: 6.9 µg/m³2026-07-08: 5.0 µg/m³2026-07-09: 4.4 µg/m³2026-07-10: 5.0 µg/m³2026-07-11: 5.2 µg/m³2026-07-12: 6.3 µg/m³2026-07-13: 4.7 µg/m³2026-07-14: 15.1 µg/m³2026-07-15: 14.4 µg/m³2026-07-16: 13.0 µg/m³2026-07-17: 15.2 µg/m³2026-07-18: 13.3 µg/m³2026-07-19: 12.0 µg/m³2026-07-20: 7.5 µg/m³2026-07-21: 3.8 µg/m³2026-07-22: 4.3 µg/m³2026-07-23: 4.9 µg/m³2026-07-24: 4.7 µg/m³2026-07-25: 4.9 µg/m³2026-07-26: 6.9 µg/m³2026-07-27: 8.9 µg/m³2026-07-28: 5.1 µg/m³2026-07-29: 4.9 µg/m³2026-07-30: 6.5 µg/m³2026-07-31: 7.0 µg/m³2026-08-01: 10.0 µg/m³2026-08-02: 17.6 µg/m³2026-08-03: 16.4 µg/m³2026-08-04: 11.6 µg/m³2026-08-05: 14.2 µg/m³2026-08-06: 15.7 µg/m³2026-08-07: 13.2 µg/m³2026-08-08: 1.3 µg/m³2026-08-09: 6.7 µg/m³2026-08-10: 7.6 µg/m³2026-08-11: 6.0 µg/m³2026-08-12: 4.1 µg/m³2026-08-13: 3.0 µg/m³2026-08-14: 5.7 µg/m³2026-08-15: 11.6 µg/m³2026-08-16: 16.5 µg/m³2026-08-17: 20.7 µg/m³2026-08-18: 8.7 µg/m³2026-08-19: 4.8 µg/m³2026-08-20: 10.3 µg/m³2026-08-21: 25.4 µg/m³2026-08-22: 3.2 µg/m³2026-08-23: 1.1 µg/m³2026-08-24: 3.7 µg/m³2026-08-25: 7.4 µg/m³2026-08-26: 10.5 µg/m³2026-08-27: 12.1 µg/m³2026-08-28: 6.5 µg/m³2026-08-29: 14.8 µg/m³2026-08-30: 13.4 µg/m³2026-08-31: 7.4 µg/m³2026-09-01: 6.8 µg/m³2026-09-02: 3.9 µg/m³2026-09-03: 5.3 µg/m³2026-09-04: 3.5 µg/m³2026-09-05: 3.1 µg/m³2026-09-06: 1.7 µg/m³2026-09-07: 2.3 µg/m³2026-09-08: 4.6 µg/m³2026-09-09: 7.3 µg/m³2026-09-10: 4.0 µg/m³2026-09-11: 10.2 µg/m³2026-09-12: 4.6 µg/m³2026-09-13: 7.7 µg/m³2026-09-14: 5.8 µg/m³2026-09-15: 9.5 µg/m³2026-09-16: 6.9 µg/m³2026-09-17: 7.0 µg/m³2026-09-18: 8.3 µg/m³2026-09-19: 18.5 µg/m³2026-09-20: 12.3 µg/m³2026-09-21: 2.8 µg/m³2026-09-22: 4.2 µg/m³2026-09-23: 5.9 µg/m³2026-09-24: 7.4 µg/m³2026-09-25: 19.8 µg/m³2026-09-26: 15.1 µg/m³2026-09-27: 13.9 µg/m³2026-09-28: 11.0 µg/m³2026-09-29: 12.9 µg/m³2026-09-30: 12.3 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

191 of 364 measured days were over the WHO 24-hour guideline.

Daily world rank

#1#2393OctNovDecJanFebMarAprMayJunJulAugSep

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

2026 against 2025, month by month

15Jan 2026: 52.7 µg/m³JanFeb 2025: 58.0 µg/m³Feb 2026: 34.2 µg/m³FebMar 2025: 36.6 µg/m³Mar 2026: 33.5 µg/m³MarApr 2025: 16.2 µg/m³Apr 2026: 14.0 µg/m³AprMay 2025: 11.2 µg/m³May 2026: 8.2 µg/m³MayJun 2025: 12.2 µg/m³Jun 2026: 9.9 µg/m³JunJul 2025: 10.4 µg/m³Jul 2026: 7.6 µg/m³JulAug 2025: 11.9 µg/m³Aug 2026: 10.0 µg/m³AugSep 2025: 12.0 µg/m³Sep 2026: 8.0 µg/m³SepOct 2025: 19.8 µg/m³OctNov 2025: 30.9 µg/m³NovDec 2025: 39.4 µg/m³Dec

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

This week against past years

This weekThis week: 13.2 µg/m³13.220252025: 6.0 µg/m³6.020242024: 14.1 µg/m³14.1

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

Monitors

StationOperatorType
SámsonkertCC BY 4.0BaseballLow-cost
OVICC BY 4.0BaseballLow-cost
M1CC BY 4.0BaseballLow-cost
FIGACC BY 4.0BaseballLow-cost
CO2 TestCC BY 4.0AirGradientLow-cost
TetteeCC BY 4.0AirGradientLow-cost
Nyíregyháza CC BY 4.0AirGradientLow-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.

Other cities in Hungary

Nyíregyháza 12.6Győr 12.2Gyál 10.4Esztergom 8.9Dunaújváros 7.9Szeged 7.5Veszprém 6.6Kazincbarcika 6.1Pécs 6.1Budapest 6.1Gyöngyös 4.2

30-day averages, µg/m³. All of Hungary →

Updated 2026-10-01 13:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.