Air at the Belgrade-Stari grad station
Stari grad, Serbia
Network: Agency for Environmental Protection · Station code: RS0032A
This year, up to yesterday (October 6)
16 days
with a daily average of particulate matter PM10 above the EU limit of 50 µg/m³.
35 days are allowed in the whole year.
In 2025: 34 days above the limit, 35 allowed.
at least
5 days
with an 8-hour average of ozone (O₃) above the target value of 120 µg/m³.
Readings are missing for part of the period, so the real number may be higher.
Worst day: March 3, 2026, PM10 105 µg/m³ as a daily average, 2.1 times the limit.
Daily average for 257 of 279 days · data for 2026 not yet finally verified · Yardstick: EU limits (Directive 2008/50/EC)
Poor
Air now · Measured at 21:00
Latest values
Latest value: 21:00
| Pollutant | Value | Level |
|---|---|---|
| PM10 | 55.9 µg/m³ | Moderate |
| NO₂ | 75.8 µg/m³ | Poor |
| O₃ | 3 µg/m³ | Good |
How the air is changing
Over the last seven days there was more PM10, NO₂, and O₃ in the air than the week before.
- PM10: average 28.8 µg/m³, week before 21.8 µg/m³
- PM2.5: average 17.4 µg/m³, week before 16.4 µg/m³
- NO₂: average 32.2 µg/m³, week before 24.1 µg/m³
- O₃: average 32.3 µg/m³, week before 22.3 µg/m³
Last month there was more PM2.5 and less O₃ in the air than the month before.
- PM10: average 20.2 µg/m³, month before 19 µg/m³
- PM2.5: average 11.7 µg/m³, month before 9.6 µg/m³
- NO₂: average 21 µg/m³, month before 20.4 µg/m³
- O₃: average 38.7 µg/m³, month before 64.9 µg/m³
Show
Particulate matter PM10
55.9
Nowµg/m³
Measured at 21:00
50
Last 24 hoursµg/m³
measured in 96 % of hours · provisional
28.8
Last 7 daysµg/m³
measured in 100 % of hours · provisional
22.8
Last 30 daysµg/m³
measured in 100 % of hours · provisional
27.7
Last 12 monthsµg/m³
measured in 94 % of hours · provisional
Days in 2024: PM10, daily average above 50 µg/m³
58 days above the limit.
- above the limit
- below the limit
- too few readings for the day
Days above the limit with values (58)
- Jan 10 56
- Jan 11 76
- Jan 12 59
- Jan 13 51
- Jan 14 65
- Jan 21 53
- Jan 22 53
- Jan 23 60
- Jan 24 53
- Jan 29 53
- Jan 30 59
- Jan 31 96
- Feb 1 117
- Feb 5 60
- Feb 6 56
- Feb 7 67
- Feb 8 52
- Feb 15 62
- Feb 16 77
- Feb 19 72
- Mar 21 64
- Mar 22 73
- Mar 23 52
- Mar 31 89
- Apr 1 122
- Apr 12 58
- Apr 13 55
- Apr 15 58
- Apr 16 63
- Jun 10 59
- Jun 20 68
- Jun 21 71
- Jun 22 65
- Aug 26 52
- Aug 27 51
- Sep 2 56
- Sep 3 61
- Sep 4 62
- Sep 5 67
- Sep 6 58
- Oct 23 54
- Oct 29 54
- Oct 30 53
- Nov 8 94
- Nov 9 79
- Nov 10 54
- Nov 18 82
- Nov 19 68
- Nov 25 64
- Nov 28 61
- Dec 17 53
- Dec 18 70
- Dec 19 101
- Dec 20 60
- Dec 28 57
- Dec 29 99
- Dec 30 126
- Dec 31 80
Values in µg/m³, limit 50 µg/m³.
Months of 2024
| Month | Days above 50 | Highest day | No readings |
|---|---|---|---|
| January | 12 above the number allowed | 96 | 0 |
| February | 8 above the number allowed | 117 | 0 |
| March | 4 above the number allowed | 89 | 0 |
| April | 5 above the number allowed | 122 | 0 |
| May | 0 | 29 | 0 |
| June | 4 above the number allowed | 71 | 0 |
| July | 0 | 45 | 0 |
| August | 2 above the number allowed | 52 | 0 |
| September | 5 above the number allowed | 67 | 0 |
| October | 3 above the number allowed | 54 | 0 |
| November | 7 above the number allowed | 94 | 0 |
| December | 8 above the number allowed | 126 | 0 |
Values in µg/m³. ■ marks a month with at least one day above the limit; the number allowed applies to the whole year. “No readings”: days on which not a single reading came from the station.
Values as a table
| Hour to | µg/m³ | Note |
|---|---|---|
| Wednesday, 10/7 | ||
| 22:00 | 64 | model estimate, not counted |
| 21:00 | 55.9 | |
| 20:00 | 70.1 | |
| 19:00 | 41.3 | |
| 18:00 | 27.9 | |
| 17:00 | 20.8 | |
| 16:00 | 23.1 | |
| 15:00 | 37 | |
| 14:00 | 41.3 | |
| 13:00 | 57.6 | |
| 12:00 | 83.1 | |
| 11:00 | 67.3 | |
| 10:00 | 66.4 | |
| 09:00 | 54.8 | |
| 08:00 | 35.3 | |
| 07:00 | 36.2 | |
| 06:00 | 40.4 | |
| 05:00 | 52.3 | |
| 04:00 | 53.3 | |
| 03:00 | 40.2 | |
| 02:00 | 50.5 | |
| 01:00 | 66.1 | |
| Tuesday, 10/6 | ||
| 00:00 | 75.4 | |
| 23:00 | 54 | |
| 22:00 | 55.8 | |
| 21:00 | 57.3 | |
| 20:00 | 51.8 | |
| 19:00 | 31.5 | |
| 18:00 | 24.7 | |
| 17:00 | 26 | |
| 16:00 | 30 | |
| 15:00 | 51 | |
| 14:00 | 43.6 | |
| 13:00 | 54.2 | |
| 12:00 | 58.5 | |
| 11:00 | 61.5 | |
| 10:00 | 58.2 | |
| 09:00 | 46.7 | |
| 08:00 | 41.2 | |
| 07:00 | 31.9 | |
| 06:00 | 28.6 | |
| 05:00 | 32.7 | |
| 04:00 | 36.1 | |
| 03:00 | 41 | |
| 02:00 | 46 | |
| 01:00 | 57.2 | |
| Monday, 10/5 | ||
| 00:00 | 40.4 | |
| 23:00 | 46.2 | |
| 22:00 | 59.2 | |
| 21:00 | 63.2 | |
| 20:00 | 51.7 | |
| 19:00 | 39 | |
| 18:00 | 27.8 | |
| 17:00 | 25.9 | |
| 16:00 | 27 | |
| 15:00 | 31.5 | |
| 14:00 | 47.2 | |
| 13:00 | 71.4 | |
| 12:00 | 71.6 | |
| 11:00 | 54.7 | |
| 10:00 | 37.3 | |
| 09:00 | 31.9 | |
| 08:00 | 24 | |
| 07:00 | 21.5 | |
| 06:00 | 21.2 | |
| 05:00 | 24.7 | |
| 04:00 | 27.4 | |
| 03:00 | 29.7 | |
| 02:00 | 71.1 | |
| 01:00 | 79.9 | |
| Sunday, 10/4 | ||
| 00:00 | 59 | |
| 23:00 | 40.8 | |
| 22:00 | 52.3 | |
| 21:00 | 62.2 | |
| 20:00 | 36.1 | |
| 19:00 | 15.6 | |
| 18:00 | 9.9 | |
| 17:00 | 9.4 | |
| 16:00 | 11.9 | |
| 15:00 | 12.8 | |
| 14:00 | 14.3 | |
| 13:00 | 17.4 | |
| 12:00 | 17.5 | |
| 11:00 | 22.9 | |
| 10:00 | 22.4 | |
| 09:00 | 19.8 | |
| 08:00 | 17.7 | |
| 07:00 | 17 | |
| 06:00 | 17.7 | |
| 05:00 | 17.6 | |
| 04:00 | 26.7 | |
| 03:00 | 29.9 | |
| 02:00 | 26.1 | |
| 01:00 | 34.9 | |
| Saturday, 10/3 | ||
| 00:00 | 46.4 | |
| 23:00 | 42 | |
| 22:00 | 38.7 | |
| 21:00 | 33.7 | |
| 20:00 | 27.4 | |
| 19:00 | 19.5 | |
| 18:00 | 18.7 | |
| 17:00 | 21.9 | |
| 16:00 | 25.9 | |
| 15:00 | 14.4 | |
| 14:00 | 14.4 | |
| 13:00 | 15.4 | |
| 12:00 | 18.2 | |
| 11:00 | 29.6 | |
| 10:00 | 52.7 | |
| 09:00 | 34.7 | |
| 08:00 | 22.6 | |
| 07:00 | 21.9 | |
| 06:00 | 20.9 | |
| 05:00 | 17.6 | |
| 04:00 | 17.3 | |
| 03:00 | 20.3 | |
| 02:00 | 13.9 | |
| 01:00 | 14.9 | |
| Friday, 10/2 | ||
| 00:00 | 39.4 | |
| 23:00 | 43.8 | |
| 22:00 | 48.2 | |
| 21:00 | 42.5 | |
| 20:00 | 23.5 | |
| 19:00 | 13.9 | |
| 18:00 | 14.1 | |
| 17:00 | 23 | |
| 16:00 | 19.5 | |
| 15:00 | 21.8 | |
| 14:00 | 19.1 | |
| 13:00 | 20.9 | |
| 12:00 | 21.9 | |
| 11:00 | 21.6 | |
| 10:00 | 24.7 | |
| 09:00 | 38 | |
| 08:00 | 28.9 | |
| 07:00 | 33.8 | |
| 06:00 | 31.8 | |
| 05:00 | 27 | |
| 04:00 | 19.9 | |
| 03:00 | 17.3 | |
| 02:00 | 18.5 | |
| 01:00 | 19.5 | |
| Thursday, 10/1 | ||
| 00:00 | 19.5 | |
| 23:00 | 21.8 | |
| 22:00 | 23.4 | |
| 21:00 | 24.6 | |
| 20:00 | 20.5 | |
| 19:00 | 13.3 | |
| 18:00 | 15.3 | |
| 17:00 | 17.1 | |
| 16:00 | 14.3 | |
| 15:00 | 16.8 | |
| 14:00 | 19.5 | |
| 13:00 | 14.9 | |
| 12:00 | 17.4 | |
| 11:00 | 19 | |
| 10:00 | 18.4 | |
| 09:00 | 25.7 | |
| 08:00 | 18.3 | |
| 07:00 | 15.1 | |
| 06:00 | 16.8 | |
| 05:00 | 16.6 | |
| 04:00 | 15.7 | |
| 03:00 | 16.3 | |
| 02:00 | 18.3 | |
| 01:00 | 20.3 | |
| Wednesday, 9/30 | ||
| 00:00 | 22.2 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 45.6 | provisional |
| Mon, 10/5 | 42.7 | provisional |
| Sun, 10/4 | 25.5 | provisional |
| Sat, 10/3 | 25.1 | provisional |
| Fri, 10/2 | 26.4 | provisional |
| Thu, 10/1 | 18.3 | provisional |
| Wed, 9/30 | 17.8 | provisional |
| Tue, 9/29 | 34.5 | provisional |
| Mon, 9/28 | 25.8 | provisional |
| Sun, 9/27 | 26.7 | provisional |
| Sat, 9/26 | 26.2 | provisional |
| Fri, 9/25 | 14.7 | provisional |
| Thu, 9/24 | 14.3 | provisional |
| Wed, 9/23 | 10.4 | provisional |
| Tue, 9/22 | 14.8 | provisional |
| Mon, 9/21 | 25.3 | provisional |
| Sun, 9/20 | 25.5 | provisional |
| Sat, 9/19 | 22.3 | provisional |
| Fri, 9/18 | 19.1 | provisional |
| Thu, 9/17 | 19.2 | provisional |
| Wed, 9/16 | 23 | provisional |
| Tue, 9/15 | 16.8 | provisional |
| Mon, 9/14 | 17.9 | provisional |
| Sun, 9/13 | 15.8 | provisional |
| Sat, 9/12 | 13.1 | provisional |
| Fri, 9/11 | 26.6 | provisional |
| Thu, 9/10 | 23.6 | provisional |
| Wed, 9/9 | 24.9 | provisional |
| Tue, 9/8 | 21.9 | provisional |
| Mon, 9/7 | 21.5 | provisional |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 30.6 | 11 | measured in 100 % of hours · provisional · year before: same days |
| September 2026 | 20.2 | 11.2 | measured in 100 % of hours · provisional |
| August 2026 | 19 | 10.1 | measured in 99 % of hours · provisional |
| July 2026 | 18.8 | 13.9 | measured in 100 % of hours · provisional |
| June 2026 | too few readings | 20.5 | measured in 70 % of hours · provisional · 8 days without data from the station |
| May 2026 | too few readings | 17.3 | measured in 66 % of hours · provisional · 9 days without data from the station |
| April 2026 | 24.1 | 22.5 | measured in 100 % of hours · provisional |
| March 2026 | 37.6 | 33.9 | measured in 100 % of hours · provisional |
| February 2026 | 25.7 | 43.6 | measured in 100 % of hours · provisional |
| January 2026 | 37.7 | 39 | measured in 100 % of hours · provisional |
| December 2025 | 42.8 | 41.9 | measured in 100 % of hours · verified |
| November 2025 | 30.6 | 41.7 | measured in 100 % of hours · verified |
PM10 by year
Yardstick: EU limits (Directive 2008/50/EC)
| Measure | 2026* | 2025 | 2024 |
|---|---|---|---|
| Days above 50 µg/m³ (allowed 35) | 16 | 34 | 58 above the number allowed |
| Annual average, µg/m³ (EU limit 40) | 25.6* | 25.7 | 33.5 |
| Highest daily average, µg/m³ | 105March 3 | 121December 19 | 126December 30 |
| Highest hourly value, µg/m³ | 194January 15 | 735October 30 | 214March 31 |
| Hours measured | 93 % | 100 % | 99 % |
| Days without any reading from the station | 17 | 0 | 0 |
* 2026 up to October 6; the average since the start of the year is not yet an annual average.
The monitoring networks have not yet finally verified this year’s data. The EEA publishes verified values once a year.
Unverified hourly values of particulate matter from 975 µg/m³ up, and single spikes from 500 µg/m³ up between low values, count as missing. In the verified data for BiH from 2023 to 2025 no hour was above 600 µg/m³.
■ and a figure in red: more than is allowed for the whole year.
The column for 2023 is shown on wider screens.
Compared with the new EU rules and the WHO recommendation
This is not the yardstick for the verdict above, only a comparison. From 2030 the EU tightens its limits (Directive (EU) 2024/2881), and since 2021 the World Health Organization has recommended even lower values.
- EU from 2030: daily 45 µg/m³, 18 days allowed. In 2024 there were 72 such days.
- WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2024 there were 72 such days.
- EU from 2030: annual average 20 µg/m³. Average in 2024: 34 µg/m³.
- WHO 2021: annual average 15 µg/m³. Average in 2024: 34 µg/m³.
Sources: Directive (EU) 2024/2881, Annex I; WHO global air quality guidelines 2021, table 0.1. Checked against the texts on 7 October 2026.
The worst days of 2024
| Day | Average | Times the limit |
|---|---|---|
| Dec 30, 2024 | 126 | 2.5 × |
| Apr 1, 2024 | 122 | 2.4 × |
| Feb 1, 2024 | 117 | 2.3 × |
| Dec 19, 2024 | 101 | 2.0 × |
| Dec 29, 2024 | 99 | 2.0 × |
Daily average in µg/m³, daily limit 50 µg/m³. Days with the same unverified value over many hours are not on this list.
Particulate matter PM2.5
no measurement
Now
too few readings
Last 24 hours
measured in 8 % of hours · provisional
17.4
Last 7 daysµg/m³
measured in 100 % of hours · provisional
14.2
Last 30 daysµg/m³
measured in 100 % of hours · provisional
18.6
Last 12 monthsµg/m³
measured in 94 % of hours · provisional
Months of 2024
| Month | Highest day | No readings |
|---|---|---|
| January | 77 | 0 |
| February | 95 | 0 |
| March | 45 | 0 |
| April | 31 | 0 |
| May | 15 | 0 |
| June | 21 | 0 |
| July | 19 | 0 |
| August | 19 | 0 |
| September | 27 | 0 |
| October | 46 | 0 |
| November | 85 | 0 |
| December | 113 | 0 |
Values in µg/m³. ■ marks a month with at least one day above the limit; the number allowed applies to the whole year. “No readings”: days on which not a single reading came from the station.
Values as a table
| Hour to | µg/m³ | Note |
|---|---|---|
| Tuesday, 10/6 | ||
| 00:00 | 51.3 | |
| 23:00 | 33.2 | |
| 22:00 | 35.8 | |
| 21:00 | 33.8 | |
| 20:00 | 23.7 | |
| 19:00 | 13.5 | |
| 18:00 | 9.6 | |
| 17:00 | 10.2 | |
| 16:00 | 10.6 | |
| 15:00 | 12.8 | |
| 14:00 | 18.6 | |
| 13:00 | 29.5 | |
| 12:00 | 29.2 | |
| 11:00 | 33.7 | |
| 10:00 | 33.7 | |
| 09:00 | 33.2 | |
| 08:00 | 30.7 | |
| 07:00 | 23.8 | |
| 06:00 | 19.4 | |
| 05:00 | 22 | |
| 04:00 | 24.7 | |
| 03:00 | 29.4 | |
| 02:00 | 31 | |
| 01:00 | 38.5 | |
| Monday, 10/5 | ||
| 00:00 | 25.8 | |
| 23:00 | 33.4 | |
| 22:00 | 42.3 | |
| 21:00 | 39.5 | |
| 20:00 | 29.6 | |
| 19:00 | 23.5 | |
| 18:00 | 17.4 | |
| 17:00 | 11.9 | |
| 16:00 | 12.5 | |
| 15:00 | 18.4 | |
| 14:00 | 23.8 | |
| 13:00 | 36.2 | |
| 12:00 | 42.6 | |
| 11:00 | 35.6 | |
| 10:00 | 20.5 | |
| 09:00 | 21.5 | |
| 08:00 | 16.3 | |
| 07:00 | 16.6 | |
| 06:00 | 16.5 | |
| 05:00 | 18.9 | |
| 04:00 | 20.6 | |
| 03:00 | 23.3 | |
| 02:00 | 61.3 | |
| 01:00 | 66.7 | |
| Sunday, 10/4 | ||
| 00:00 | 51.4 | |
| 23:00 | 34.9 | |
| 22:00 | 41.6 | |
| 21:00 | 45.4 | |
| 20:00 | 27 | |
| 19:00 | 11.2 | |
| 18:00 | 4.6 | |
| 17:00 | 4.4 | |
| 16:00 | 5.5 | |
| 15:00 | 6 | |
| 14:00 | 6.6 | |
| 13:00 | 9.1 | |
| 12:00 | 9.6 | |
| 11:00 | 13.6 | |
| 10:00 | 14.3 | |
| 09:00 | 12.5 | |
| 08:00 | 11.3 | |
| 07:00 | 11.3 | |
| 06:00 | 11.9 | |
| 05:00 | 11.7 | |
| 04:00 | 19.5 | |
| 03:00 | 21.4 | |
| 02:00 | 18.9 | |
| 01:00 | 25.7 | |
| Saturday, 10/3 | ||
| 00:00 | 30.3 | |
| 23:00 | 28.5 | |
| 22:00 | 26.5 | |
| 21:00 | 23.5 | |
| 20:00 | 18.2 | |
| 19:00 | 12.2 | |
| 18:00 | 10.5 | |
| 17:00 | 11.4 | |
| 16:00 | 8.9 | |
| 15:00 | 6.4 | |
| 14:00 | 6.2 | |
| 13:00 | 7.9 | |
| 12:00 | 9.1 | |
| 11:00 | 10.7 | |
| 10:00 | 21.2 | |
| 09:00 | 20.2 | |
| 08:00 | 16.8 | |
| 07:00 | 15.6 | |
| 06:00 | 15.4 | |
| 05:00 | 11.7 | |
| 04:00 | 10.9 | |
| 03:00 | 12.8 | |
| 02:00 | 7.7 | |
| 01:00 | 9.7 | |
| Friday, 10/2 | ||
| 00:00 | 27.5 | |
| 23:00 | 28.2 | |
| 22:00 | 34.9 | |
| 21:00 | 25.8 | |
| 20:00 | 13.8 | |
| 19:00 | 6.8 | |
| 18:00 | 6.3 | |
| 17:00 | 7.3 | |
| 16:00 | 7.3 | |
| 15:00 | 8.1 | |
| 14:00 | 7.4 | |
| 13:00 | 9.7 | |
| 12:00 | 11.2 | |
| 11:00 | 11 | |
| 10:00 | 11.3 | |
| 09:00 | 16.5 | |
| 08:00 | 20 | |
| 07:00 | 26.2 | |
| 06:00 | 24.1 | |
| 05:00 | 19.7 | |
| 04:00 | 12.7 | |
| 03:00 | 9.8 | |
| 02:00 | 9.9 | |
| 01:00 | 10.2 | |
| Thursday, 10/1 | ||
| 00:00 | 10.5 | |
| 23:00 | 12.7 | |
| 22:00 | 14.6 | |
| 21:00 | 17.6 | |
| 20:00 | 14.1 | |
| 19:00 | 7.5 | |
| 18:00 | 7.1 | |
| 17:00 | 7.1 | |
| 16:00 | 6.3 | |
| 15:00 | 6.8 | |
| 14:00 | 7.3 | |
| 13:00 | 7.4 | |
| 12:00 | 9.7 | |
| 11:00 | 9.9 | |
| 10:00 | 9.6 | |
| 09:00 | 11.3 | |
| 08:00 | 10.1 | |
| 07:00 | 9.1 | |
| 06:00 | 9.6 | |
| 05:00 | 9.3 | |
| 04:00 | 8.7 | |
| 03:00 | 8.6 | |
| 02:00 | 9.3 | |
| 01:00 | 10.4 | |
| Wednesday, 9/30 | ||
| 00:00 | 12.2 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 26.3 | provisional |
| Mon, 10/5 | 28.1 | provisional |
| Sun, 10/4 | 17.9 | provisional |
| Sat, 10/3 | 14.7 | provisional |
| Fri, 10/2 | 15.2 | provisional |
| Thu, 10/1 | 9.8 | provisional |
| Wed, 9/30 | 10 | provisional |
| Tue, 9/29 | 24.1 | provisional |
| Mon, 9/28 | 18.8 | provisional |
| Sun, 9/27 | 21.9 | provisional |
| Sat, 9/26 | 21.9 | provisional |
| Fri, 9/25 | 13.4 | provisional |
| Thu, 9/24 | 7.3 | provisional |
| Wed, 9/23 | 7.1 | provisional |
| Tue, 9/22 | 9.1 | provisional |
| Mon, 9/21 | 14.7 | provisional |
| Sun, 9/20 | 18.4 | provisional |
| Sat, 9/19 | 15.8 | provisional |
| Fri, 9/18 | 10.1 | provisional |
| Thu, 9/17 | 11 | provisional |
| Wed, 9/16 | 17.2 | provisional |
| Tue, 9/15 | 14.6 | provisional |
| Mon, 9/14 | 10.3 | provisional |
| Sun, 9/13 | 12 | provisional |
| Sat, 9/12 | 9.1 | provisional |
| Fri, 9/11 | 9.7 | provisional |
| Thu, 9/10 | 9 | provisional |
| Wed, 9/9 | 9.5 | provisional |
| Tue, 9/8 | 10.6 | provisional |
| Mon, 9/7 | 9.9 | provisional |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 18.7 | too few readings | measured in 100 % of hours · provisional · year before: same days |
| September 2026 | 11.7 | 8.6 | measured in 100 % of hours · provisional |
| August 2026 | 9.6 | 7.6 | measured in 99 % of hours · provisional |
| July 2026 | 8.8 | 8.3 | measured in 100 % of hours · provisional |
| June 2026 | too few readings | 11.1 | measured in 70 % of hours · provisional · 8 days without data from the station |
| May 2026 | too few readings | 11.2 | measured in 66 % of hours · provisional · 9 days without data from the station |
| April 2026 | 13.5 | 14.5 | measured in 100 % of hours · provisional |
| March 2026 | 24.6 | 25.7 | measured in 100 % of hours · provisional |
| February 2026 | 20.8 | 38.4 | measured in 100 % of hours · provisional |
| January 2026 | 33.5 | 32.6 | measured in 100 % of hours · provisional |
| December 2025 | 35.3 | 37.6 | measured in 100 % of hours · verified |
| November 2025 | 23.3 | 38.7 | measured in 98 % of hours · verified |
PM2.5 by year
Yardstick: EU limits (Directive 2008/50/EC)
| Measure | 2026* | 2025 | 2024 |
|---|---|---|---|
| Annual average, µg/m³ (EU limit 25) | 16.3* | 19.3 | 21.3 |
| Highest daily average, µg/m³ | 86January 15 | 98December 18 | 113December 30 |
| Highest hourly value, µg/m³ | 187January 15 | 166February 21 | 173December 30 |
| Hours measured | 93 % | 96 % | 98 % |
| Days without any reading from the station | 17 | 0 | 0 |
* 2026 up to October 6; the average since the start of the year is not yet an annual average.
The monitoring networks have not yet finally verified this year’s data. The EEA publishes verified values once a year.
Unverified hourly values of particulate matter from 975 µg/m³ up, and single spikes from 500 µg/m³ up between low values, count as missing. In the verified data for BiH from 2023 to 2025 no hour was above 600 µg/m³.
■ and a figure in red: more than is allowed for the whole year.
The column for 2023 is shown on wider screens.
Compared with the new EU rules and the WHO recommendation
This is not the yardstick for the verdict above, only a comparison. From 2030 the EU tightens its limits (Directive (EU) 2024/2881), and since 2021 the World Health Organization has recommended even lower values.
- EU from 2030: daily 25 µg/m³, 18 days allowed. In 2024 there were 89 such days.
- WHO 2021: daily 15 µg/m³, at most three to four days a year. In 2024 there were 189 such days.
- EU from 2030: annual average 10 µg/m³. Average in 2024: 21 µg/m³.
- WHO 2021: annual average 5 µg/m³. Average in 2024: 21 µg/m³.
Sources: Directive (EU) 2024/2881, Annex I; WHO global air quality guidelines 2021, table 0.1. Checked against the texts on 7 October 2026.
Nitrogen dioxide NO₂
75.8
Nowµg/m³
Measured at 21:00
54.2
Last 24 hoursµg/m³
measured in 96 % of hours · provisional
32.2
Last 7 daysµg/m³
measured in 99 % of hours · provisional
24.2
Last 30 daysµg/m³
measured in 98 % of hours · provisional
too few readings
Last 12 months
measured in 79 % of hours · 2 months with too few readings · provisional
Days in 2024: NO₂, at least one hour above 200 µg/m³
No measured day above the limit.
- above the limit
- below the limit
- too few readings for the day
Months of 2024
| Month | Days with an hour above 200 | Hours above 200 | Highest day | No readings |
|---|---|---|---|---|
| January | 0 | 0 | 50 | 0 |
| February | 0 | 0 | 59 | 0 |
| March | 0 | 0 | 49 | 0 |
| April | 0 | 0 | 45 | 0 |
| May | 0 | 0 | 31 | 0 |
| June | 0 | 0 | 40 | 0 |
| July | 0 | 0 | 36 | 0 |
| August | 0 | 0 | 45 | 0 |
| September | 0 | 0 | 56 | 0 |
| October | 0 | 0 | 54 | 0 |
| November | 0 | 0 | 57 | 0 |
| December | 0 | 0 | 52 | 0 |
Values in µg/m³. ■ marks a month with at least one day above the limit; the number allowed applies to the whole year. “No readings”: days on which not a single reading came from the station.
Values as a table
| Hour to | µg/m³ | Note |
|---|---|---|
| Wednesday, 10/7 | ||
| 22:00 | 29 | model estimate, not counted |
| 21:00 | 75.8 | |
| 20:00 | 71.2 | |
| 19:00 | 64.3 | |
| 18:00 | 34.1 | |
| 17:00 | 35.3 | |
| 16:00 | 30.6 | |
| 15:00 | 48.4 | |
| 14:00 | 53.8 | |
| 13:00 | 69.9 | |
| 12:00 | 75.7 | |
| 11:00 | 58.9 | |
| 10:00 | 40.4 | |
| 09:00 | 36.1 | |
| 08:00 | 35.2 | |
| 07:00 | 34.7 | |
| 06:00 | 38.9 | |
| 05:00 | 45.5 | |
| 04:00 | 45.7 | |
| 03:00 | 59.1 | |
| 02:00 | 65.2 | |
| 01:00 | 73.2 | |
| Tuesday, 10/6 | ||
| 00:00 | 78.5 | |
| 23:00 | 76.6 | |
| 22:00 | 77.9 | |
| 21:00 | 80.1 | |
| 20:00 | 67 | |
| 19:00 | 44.7 | |
| 18:00 | 19.8 | |
| 17:00 | 19.3 | |
| 16:00 | 17.6 | |
| 15:00 | 18.8 | |
| 14:00 | 38.5 | |
| 13:00 | 66.8 | |
| 12:00 | 72.3 | |
| 11:00 | 58.5 | |
| 10:00 | 54.5 | |
| 09:00 | 43 | |
| 08:00 | 43.6 | |
| 07:00 | 39.7 | |
| 06:00 | 40.8 | |
| 05:00 | 56.3 | |
| 04:00 | 64.1 | |
| 03:00 | 45.7 | |
| 02:00 | 71.8 | |
| 01:00 | 70.9 | |
| Monday, 10/5 | ||
| 00:00 | 62.5 | |
| 23:00 | 60.8 | |
| 21:00 | 70.3 | |
| 20:00 | 65.9 | |
| 19:00 | 37.9 | |
| 18:00 | 19.1 | |
| 17:00 | 15.9 | |
| 16:00 | 20.3 | |
| 15:00 | 25.8 | |
| 14:00 | 46.9 | |
| 13:00 | 59.1 | |
| 12:00 | 50.7 | |
| 11:00 | 39.1 | |
| 10:00 | 42.6 | |
| 09:00 | 38.5 | |
| 08:00 | 45.6 | |
| 07:00 | 36.2 | |
| 06:00 | 32.9 | |
| 05:00 | 44.3 | |
| 04:00 | 50.7 | |
| 03:00 | 56.8 | |
| 02:00 | 55.6 | |
| 01:00 | 57.8 | |
| Sunday, 10/4 | ||
| 00:00 | 61.4 | |
| 23:00 | 54.8 | |
| 22:00 | 63.6 | |
| 21:00 | 64 | |
| 20:00 | 62.8 | |
| 19:00 | 20.2 | |
| 18:00 | 13.1 | |
| 17:00 | 11.2 | |
| 16:00 | 13.7 | |
| 15:00 | 11.5 | |
| 14:00 | 10 | |
| 13:00 | 11.1 | |
| 12:00 | 15.7 | |
| 11:00 | 25.1 | |
| 10:00 | 23.3 | |
| 09:00 | 33.4 | |
| 08:00 | 23.6 | |
| 07:00 | 20.2 | |
| 06:00 | 20.1 | |
| 05:00 | 23.5 | |
| 04:00 | 41 | |
| 03:00 | 47.6 | |
| 02:00 | 45.3 | |
| 01:00 | 51.1 | |
| Saturday, 10/3 | ||
| 00:00 | 55.3 | |
| 23:00 | 57.6 | |
| 22:00 | 54.1 | |
| 21:00 | 50.2 | |
| 20:00 | 40.8 | |
| 19:00 | 18.5 | |
| 18:00 | 12.9 | |
| 17:00 | 12.4 | |
| 16:00 | 13.3 | |
| 15:00 | 11 | |
| 14:00 | 14.5 | |
| 13:00 | 16.2 | |
| 12:00 | 20.5 | |
| 11:00 | 25.7 | |
| 10:00 | 35.7 | |
| 09:00 | 30.8 | |
| 08:00 | 25.5 | |
| 07:00 | 29.5 | |
| 06:00 | 27.8 | |
| 05:00 | 24.1 | |
| 04:00 | 32.2 | |
| 03:00 | 46.3 | |
| 02:00 | 26.2 | |
| 01:00 | 38.8 | |
| Friday, 10/2 | ||
| 00:00 | 61.6 | |
| 23:00 | 59.7 | |
| 22:00 | 61.1 | |
| 20:00 | 35.5 | |
| 19:00 | 16.3 | |
| 18:00 | 13 | |
| 17:00 | 15.2 | |
| 16:00 | 13.5 | |
| 15:00 | 12.5 | |
| 14:00 | 12.9 | |
| 13:00 | 17.3 | |
| 12:00 | 23.9 | |
| 11:00 | 24.1 | |
| 10:00 | 27.7 | |
| 09:00 | 35.3 | |
| 08:00 | 25.5 | |
| 07:00 | 21.7 | |
| 06:00 | 27.6 | |
| 05:00 | 18.9 | |
| 04:00 | 19.9 | |
| 03:00 | 16.4 | |
| 02:00 | 19.6 | |
| 01:00 | 24.9 | |
| Thursday, 10/1 | ||
| 00:00 | 30.1 | |
| 23:00 | 31.6 | |
| 22:00 | 38.4 | |
| 21:00 | 38.3 | |
| 20:00 | 30 | |
| 19:00 | 19.3 | |
| 18:00 | 15.3 | |
| 17:00 | 15.4 | |
| 16:00 | 14.2 | |
| 15:00 | 13.7 | |
| 14:00 | 13.3 | |
| 13:00 | 13.3 | |
| 12:00 | 16.8 | |
| 11:00 | 20.7 | |
| 10:00 | 27.8 | |
| 09:00 | 35.7 | |
| 08:00 | 21.9 | |
| 07:00 | 11.4 | |
| 06:00 | 12.1 | |
| 05:00 | 11.2 | |
| 04:00 | 10.8 | |
| 03:00 | 12.1 | |
| 02:00 | 18.8 | |
| 01:00 | 20.6 | |
| Wednesday, 9/30 | ||
| 00:00 | 23.6 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 52.8 | provisional |
| Mon, 10/5 | 45 | provisional |
| Sun, 10/4 | 32 | provisional |
| Sat, 10/3 | 30 | provisional |
| Fri, 10/2 | 26.3 | provisional |
| Thu, 10/1 | 20.5 | provisional |
| Wed, 9/30 | 19.5 | provisional |
| Tue, 9/29 | 39.7 | provisional |
| Mon, 9/28 | 30 | provisional |
| Sun, 9/27 | 26.7 | provisional |
| Sat, 9/26 | 19.6 | provisional |
| Fri, 9/25 | 15.3 | provisional |
| Thu, 9/24 | 20.3 | provisional |
| Wed, 9/23 | 17 | provisional |
| Tue, 9/22 | 15.3 | provisional |
| Mon, 9/21 | 21.2 | provisional |
| Sun, 9/20 | 31.6 | provisional |
| Sat, 9/19 | 21.4 | provisional |
| Fri, 9/18 | 19 | provisional |
| Thu, 9/17 | 29.3 | provisional |
| Wed, 9/16 | 24.9 | provisional |
| Tue, 9/15 | 14.8 | provisional |
| Mon, 9/14 | 24.6 | provisional |
| Sun, 9/13 | 15.3 | provisional |
| Sat, 9/12 | 12.4 | provisional |
| Fri, 9/11 | 19 | provisional |
| Thu, 9/10 | 15.4 | provisional |
| Wed, 9/9 | 17.8 | provisional |
| Tue, 9/8 | 24.6 | provisional |
| Mon, 9/7 | 26 | provisional |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 34.4 | 14.4 | measured in 99 % of hours · provisional · year before: same days |
| September 2026 | 21 | 19.5 | measured in 98 % of hours · provisional |
| August 2026 | 20.4 | 19.1 | measured in 95 % of hours · provisional |
| July 2026 | 18.7 | 18.4 | measured in 99 % of hours · provisional |
| June 2026 | too few readings | 21.1 | measured in 68 % of hours · provisional · 8 days without data from the station |
| May 2026 | too few readings | 17.3 | measured in 65 % of hours · provisional · 9 days without data from the station |
| April 2026 | 18.2 | 19.5 | measured in 99 % of hours · provisional |
| March 2026 | 22 | 29.9 | measured in 98 % of hours · provisional |
| February 2026 | too few readings | 25.1 | measured in 32 % of hours · provisional |
| January 2026 | too few readings | 31.9 | |
| December 2025 | 22.1 | 30.5 | measured in 99 % of hours · verified |
| November 2025 | 19.2 | 32.7 | measured in 91 % of hours · verified |
NO₂ by year
Yardstick: EU limits (Directive 2008/50/EC)
| Measure | 2026* | 2025 | 2024 |
|---|---|---|---|
| Hours above 200 µg/m³ (allowed 18) | 0² | 0 | 0 |
| Hours above 400 µg/m³, three hours in a row (alert threshold) | 0 | 0 | 0 |
| Annual average, µg/m³ (EU limit 40) | too few | 21.8 | 26.8 |
| Highest daily average, µg/m³ | 53October 6 | 70March 21 | 59February 1 |
| Highest hourly value, µg/m³ | 119August 4 | 144March 21 | 143September 2 |
| Hours measured | 73 % | 97 % | 98 % |
| Days without any reading from the station | 17 | 0 | 0 |
* 2026 up to October 6; the average since the start of the year is not yet an annual average.
The monitoring networks have not yet finally verified this year’s data. The EEA publishes verified values once a year.
² Too few readings to compare with the number allowed: the figure covers only what was measured.
■ and a figure in red: more than is allowed for the whole year.
There is no allowed number for the warning and alert thresholds: every such hour or day is in red.
The column for 2023 is shown on wider screens.
Compared with the new EU rules and the WHO recommendation
This is not the yardstick for the verdict above, only a comparison. From 2030 the EU tightens its limits (Directive (EU) 2024/2881), and since 2021 the World Health Organization has recommended even lower values.
- EU from 2030: daily 50 µg/m³, 18 days allowed. In 2024 there were 11 such days.
- WHO 2021: daily 25 µg/m³, at most three to four days a year. In 2024 there were 177 such days.
- EU from 2030: annual average 20 µg/m³. Average in 2024: 27 µg/m³.
- WHO 2021: annual average 10 µg/m³. Average in 2024: 27 µg/m³.
Sources: Directive (EU) 2024/2881, Annex I; WHO global air quality guidelines 2021, table 0.1. Checked against the texts on 7 October 2026.
Ozone O₃
3
Nowµg/m³
Measured at 21:00
13.1
Last 24 hoursµg/m³
measured in 96 % of hours · provisional
32.3
Last 7 daysµg/m³
measured in 97 % of hours · provisional
34
Last 30 daysµg/m³
measured in 98 % of hours · provisional
too few readings
Last 12 months
measured in 88 % of hours · 1 month with too few readings · provisional
Days in 2024: O₃, 8-hour average above 120 µg/m³
15 days above the limit.
- above the limit
- below the limit
- too few readings for the day
- no O₃ data in the EEA database
Days above the limit with values (15)
- Jul 13 182
- Jul 14 173
- Jul 15 167
- Jul 16 140
- Aug 21 137
- Aug 23 128
- Aug 24 135
- Aug 26 149
- Aug 28 122
- Aug 29 121
- Sep 2 134
- Sep 3 138
- Sep 4 142
- Sep 5 123
- Sep 6 120
Values in µg/m³, limit 120 µg/m³.
Months of 2024
| Month | Days above 120 | Highest 8 h | No readings |
|---|---|---|---|
| January | 0 | 61 | 0 |
| February | 0 | 59 | 0 |
| March | 0 | 69 | 0 |
| April | 0 | 93 | 0 |
| May | 0 | 92 | 0 |
| June | 0 | 109 | 0 |
| July | 4 above the number allowed | 182 | 0 |
| August | 6 above the number allowed | 149 | 0 |
| September | 5 above the number allowed | 142 | 0 |
| October | 0 | 69 | 0 |
| November | 0 | 54 | 0 |
| December | 0 | 52 | 0 |
Values in µg/m³. ■ marks a month with at least one day above the limit; the number allowed applies to the whole year. “No readings”: days on which not a single reading came from the station.
Values as a table
| Hour to | µg/m³ | Note |
|---|---|---|
| Wednesday, 10/7 | ||
| 22:00 | 45 | model estimate, not counted |
| 21:00 | 3 | |
| 20:00 | 6.4 | |
| 19:00 | 12.2 | |
| 18:00 | 52.8 | |
| 17:00 | 52.5 | |
| 16:00 | 63.4 | |
| 15:00 | 48 | |
| 14:00 | 32.9 | |
| 13:00 | 13 | |
| 12:00 | 2.9 | |
| 11:00 | 0.9 | |
| 10:00 | 1.4 | |
| 09:00 | 1.5 | |
| 08:00 | 0.9 | |
| 07:00 | 0.6 | |
| 06:00 | 0.6 | |
| 05:00 | 0.9 | |
| 04:00 | 0.5 | |
| 03:00 | 0.8 | |
| 02:00 | 0.8 | |
| 01:00 | 1.6 | |
| Tuesday, 10/6 | ||
| 00:00 | 1.9 | |
| 23:00 | 1.7 | |
| 22:00 | 2.2 | |
| 21:00 | 1.6 | |
| 20:00 | 9.7 | |
| 19:00 | 37 | |
| 18:00 | 88.3 | |
| 17:00 | 88.8 | |
| 16:00 | 95.4 | |
| 15:00 | 88.6 | |
| 14:00 | 66.3 | |
| 13:00 | 26.3 | |
| 12:00 | 7.3 | |
| 11:00 | 1.8 | |
| 10:00 | 0.5 | |
| 09:00 | 0.7 | |
| 08:00 | 0.6 | |
| 07:00 | 3.6 | |
| 06:00 | 10.4 | |
| 05:00 | 1.9 | |
| 04:00 | 1.2 | |
| 03:00 | 12.2 | |
| 02:00 | 2.4 | |
| 01:00 | 1 | |
| Monday, 10/5 | ||
| 00:00 | 3.3 | |
| 23:00 | 7.4 | |
| 21:00 | 2.4 | |
| 20:00 | 9.7 | |
| 19:00 | 41.1 | |
| 18:00 | 77.8 | |
| 17:00 | 78.4 | |
| 16:00 | 72 | |
| 15:00 | 58.2 | |
| 14:00 | 37.8 | |
| 13:00 | 12.6 | |
| 12:00 | 13.8 | |
| 11:00 | 14.7 | |
| 10:00 | 6.5 | |
| 09:00 | 1.4 | |
| 08:00 | 1.4 | |
| 07:00 | 5 | |
| 06:00 | 8.4 | |
| 05:00 | 3.6 | |
| 04:00 | 1.5 | |
| 03:00 | 1.7 | |
| 02:00 | 1.4 | |
| 01:00 | 1.3 | |
| Sunday, 10/4 | ||
| 00:00 | 1.8 | |
| 23:00 | 3.8 | |
| 22:00 | 2.6 | |
| 21:00 | 3.3 | |
| 20:00 | 9.2 | |
| 19:00 | 53 | |
| 18:00 | 71.6 | |
| 17:00 | 77.5 | |
| 16:00 | 75.3 | |
| 15:00 | 73.7 | |
| 14:00 | 72.7 | |
| 13:00 | 64.9 | |
| 12:00 | 49.8 | |
| 11:00 | 22.8 | |
| 10:00 | 15.5 | |
| 09:00 | 5.5 | |
| 08:00 | 13.2 | |
| 07:00 | 17.8 | |
| 06:00 | 17.2 | |
| 05:00 | 16.1 | |
| 04:00 | 2.6 | |
| 03:00 | 1.3 | |
| 02:00 | 3.4 | |
| 01:00 | 1.7 | |
| Saturday, 10/3 | ||
| 00:00 | 1 | |
| 23:00 | 1.3 | |
| 22:00 | 2.4 | |
| 21:00 | 6.6 | |
| 20:00 | 20.6 | |
| 19:00 | 53.9 | |
| 18:00 | 72.2 | |
| 17:00 | 84.3 | |
| 16:00 | 74.9 | |
| 15:00 | 77.7 | |
| 14:00 | 68.4 | |
| 13:00 | 59.3 | |
| 09:00 | 1.6 | |
| 08:00 | 3.3 | |
| 07:00 | 2.3 | |
| 06:00 | 4.6 | |
| 05:00 | 15.8 | |
| 04:00 | 12.4 | |
| 03:00 | 6 | |
| 02:00 | 29.1 | |
| 01:00 | 20.6 | |
| Friday, 10/2 | ||
| 00:00 | 3.1 | |
| 23:00 | 1.1 | |
| 22:00 | 1.7 | |
| 20:00 | 22.8 | |
| 19:00 | 51.7 | |
| 18:00 | 70 | |
| 17:00 | 76.4 | |
| 16:00 | 78.6 | |
| 15:00 | 77.2 | |
| 14:00 | 72.2 | |
| 13:00 | 62.8 | |
| 12:00 | 46.6 | |
| 11:00 | 46 | |
| 10:00 | 33.8 | |
| 09:00 | 12.9 | |
| 08:00 | 8.9 | |
| 07:00 | 3.2 | |
| 06:00 | 4.7 | |
| 05:00 | 17.6 | |
| 04:00 | 27.1 | |
| 03:00 | 34.5 | |
| 02:00 | 39.6 | |
| 01:00 | 40.4 | |
| Thursday, 10/1 | ||
| 00:00 | 35.4 | |
| 23:00 | 36 | |
| 22:00 | 28.9 | |
| 21:00 | 28 | |
| 20:00 | 31.7 | |
| 19:00 | 54.4 | |
| 18:00 | 64 | |
| 17:00 | 64.1 | |
| 16:00 | 65.8 | |
| 15:00 | 68.8 | |
| 14:00 | 65.6 | |
| 13:00 | 62.2 | |
| 12:00 | 52.3 | |
| 11:00 | 42.3 | |
| 10:00 | 33.7 | |
| 09:00 | 16.5 | |
| 08:00 | 22.9 | |
| 07:00 | 31.2 | |
| 06:00 | 35 | |
| 05:00 | 33.2 | |
| 04:00 | 46.3 | |
| 03:00 | 48.4 | |
| 02:00 | 39.8 | |
| 01:00 | 41.5 | |
| Wednesday, 9/30 | ||
| 00:00 | 42.2 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 62.6 | provisional |
| Mon, 10/5 | 49 | provisional |
| Sun, 10/4 | 67.3 | provisional |
| Sat, 10/3 | 72.8 | provisional |
| Fri, 10/2 | 66.9 | provisional |
| Thu, 10/1 | 62.1 | provisional |
| Wed, 9/30 | 57 | provisional |
| Tue, 9/29 | 46.1 | provisional |
| Mon, 9/28 | 57.6 | provisional |
| Sun, 9/27 | 59.3 | provisional |
| Sat, 9/26 | 48.9 | provisional |
| Fri, 9/25 | 37.1 | provisional |
| Thu, 9/24 | 45.6 | provisional |
| Wed, 9/23 | 42.4 | provisional |
| Tue, 9/22 | 45.5 | provisional |
| Mon, 9/21 | 52.1 | provisional |
| Sun, 9/20 | 92.9 | provisional |
| Sat, 9/19 | 74 | provisional |
| Fri, 9/18 | 61.8 | provisional |
| Thu, 9/17 | 66.1 | provisional |
| Wed, 9/16 | 57.1 | provisional |
| Tue, 9/15 | 50.5 | provisional |
| Mon, 9/14 | 59.9 | provisional |
| Sun, 9/13 | 68.4 | provisional |
| Sat, 9/12 | 67.2 | provisional |
| Fri, 9/11 | 55.3 | provisional |
| Thu, 9/10 | 67.5 | provisional |
| Wed, 9/9 | 89.3 | provisional |
| Tue, 9/8 | 95.9 | provisional |
| Mon, 9/7 | 99.5 | provisional |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 30.1 | 19.7 | measured in 97 % of hours · provisional · year before: same days |
| September 2026 | 38.7 | 34.1 | measured in 98 % of hours · provisional |
| August 2026 | 64.9 | 51 | measured in 97 % of hours · provisional |
| July 2026 | 46.9 | 50 | measured in 99 % of hours · provisional |
| June 2026 | too few readings | 55 | measured in 19 % of hours · provisional · 8 days without data from the station |
| May 2026 | too few readings | 43.3 | measured in 65 % of hours · provisional · 9 days without data from the station |
| April 2026 | 53.1 | 50.5 | measured in 97 % of hours · provisional |
| March 2026 | 48.5 | 49.3 | measured in 98 % of hours · provisional |
| February 2026 | 31.8 | 42.6 | measured in 99 % of hours · provisional |
| January 2026 | 27.9 | 29.5 | measured in 99 % of hours · provisional |
| December 2025 | 15.7 | 20.7 | measured in 99 % of hours · verified |
| November 2025 | 17.8 | 22.7 | measured in 91 % of hours · verified |
O₃ by year
Yardstick: EU limits (Directive 2008/50/EC)
| Measure | 2026* | 2025 | 2024 |
|---|---|---|---|
| Days with 8-hour average above 120 µg/m³ (target value 25) | ≥ 5² | 5 | 15 |
| Annual average, µg/m³ | too few | 38.6 | 41 |
| Highest 8-hour average, µg/m³ | 139July 17 | 138July 6 | 182July 13 |
| Hours measured | 86 % | 96 % | 97 % |
| Days without any reading from the station | 17 | 0 | 0 |
* 2026 up to October 6; the average since the start of the year is not yet an annual average.
The monitoring networks have not yet finally verified this year’s data. The EEA publishes verified values once a year.
≥ means at least: more than a tenth of the days or hours are missing, so the real number may be higher.
² Too few readings to compare with the number allowed: the figure covers only what was measured.
■ and a figure in red: more than is allowed for the whole year.
The column for 2023 is shown on wider screens.
The worst days of 2024
| Day | Highest 8 h | Times the limit |
|---|---|---|
| Jul 13, 2024 | 182 | 1.5 × |
| Jul 14, 2024 | 173 | 1.4 × |
| Jul 15, 2024 | 167 | 1.4 × |
| Aug 26, 2024 | 149 | 1.2 × |
| Sep 4, 2024 | 142 | 1.2 × |
Daily average in µg/m³, daily limit 120 µg/m³. Days with the same unverified value over many hours are not on this list.
Outages in the last 12 months
Every period of at least 24 hours in which no reading arrived from this station.
Days without a reading: 19
2 outages, 462 hours in total in the last 12 months.
Timeline of outages from October 7, 2025 to today
| From | To | Duration |
|---|---|---|
| Jun 10, 2026 13:00 | Jun 19, 2026 13:00 | 9 days |
| May 18, 2026 11:00 | May 28, 2026 17:00 | 10 days |
Calculated from the hourly values the EEA publishes. If late values arrive afterwards, an outage gets shorter or disappears.
Where the data comes from
Measured by Agency for Environmental Protection. We take the values from the European Environment Agency (EEA) under the CC BY 4.0 licence.
Values marked provisional have not been fully checked by the network yet. The EEA publishes verified data for the previous year once a year, usually by the end of September.
An hourly value is the average of one hour. We show the end of the hour: the value to 18:00 was measured from 17:00 to 18:00.
A day runs from midnight to midnight local time.
We only show an average when at least three out of four hours in the period have a reading. The EU air quality directive requires this for daily averages, and we apply the same rule to longer periods. We compare an annual average with the EU limit only once 90 % of hours are measured, as the directive requires. For 12 months and for a year we ask for more: if less than 90 % of hours are measured, every full calendar month needs readings for at least half of its hours. Otherwise a whole season could be missing from the average, such as summer, when ozone is highest.
We do not call a difference of up to 10 % a change, nor one of up to 1 µg/m³ at low levels, because weather and measurement uncertainty alone cause differences that size.
When a station sends no reading, the EEA sometimes fills the hour with a model estimate. We draw those hours dashed and leave them out of every average.
The EU limits come from Directive 2008/50/EC. Here they serve as a yardstick for comparison. When more than a tenth of the days or hours are missing, the number of exceedances can only be higher, so we write “at least” in front of it.
samoEKO is a brand of samoLabs, Juelich.