Air at the Koper station
Koper, Slovenia
Network: Slovenian Environment Agency · Station code: SI0038A
This year, up to yesterday (October 6)
102 days
with an 8-hour average of ozone (O₃) above the target value of 120 µg/m³.
The target value allows 25 such days a year, averaged over three years.
In 2025: 47 days above the limit, the target value allows 25 as a three-year average.
2 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.
Worst day: August 6, 2026, O₃ 181 µg/m³ as a daily average, 1.5 times the limit.
Daily average for 273 of 279 days · data for 2026 not yet finally verified · Yardstick: EU limits (Directive 2008/50/EC)
Moderate
Air now · Measured at 21:00
Latest values
Latest value: 21:00
| Pollutant | Value | Level |
|---|---|---|
| PM10 | 17.5 µg/m³ | Fair |
| NO₂ | 32.9 µg/m³ | Moderate |
| O₃ | 42.2 µg/m³ | Good |
How the air is changing
Over the last seven days there was more PM10, PM2.5, NO₂, and O₃ in the air than the week before.
- PM10: average 14.2 µg/m³, week before 8.2 µg/m³
- PM2.5: average 7.8 µg/m³, week before 4.8 µg/m³
- NO₂: average 11.3 µg/m³, week before 9 µg/m³
- O₃: average 96.9 µg/m³, week before 82.1 µg/m³
Last month there was less PM10, PM2.5, NO₂, and O₃ in the air than the month before.
- PM10: average 8.2 µg/m³, month before 14.4 µg/m³
- PM2.5: average 4.3 µg/m³, month before 7.6 µg/m³
- NO₂: average 9.7 µg/m³, month before 12.4 µg/m³
- O₃: average 86.8 µg/m³, month before 114.2 µg/m³
Show
Particulate matter PM10
17.5
Nowµg/m³
Measured at 21:00
18.8
Last 24 hoursµg/m³
measured in 92 % of hours · provisional
14.2
Last 7 daysµg/m³
measured in 100 % of hours · provisional
9.1
Last 30 daysµg/m³
measured in 100 % of hours · provisional
13.1
Last 12 monthsµg/m³
measured in 100 % of hours · provisional
Days in 2024: PM10, daily average above 50 µg/m³
8 days above the limit.
- above the limit
- below the limit
Days above the limit with values (8)
- Feb 1 59
- Feb 5 58
- Feb 6 57
- Feb 7 54
- Mar 30 51
- Mar 31 66
- Apr 1 77
- Jun 21 84
Values in µg/m³, limit 50 µg/m³.
Months of 2024
| Month | Days above 50 | Highest day | No readings |
|---|---|---|---|
| January | 0 | 50 | 0 |
| February | 4 above the number allowed | 59 | 0 |
| March | 2 above the number allowed | 66 | 0 |
| April | 1 above the number allowed | 77 | 0 |
| May | 0 | 40 | 0 |
| June | 1 above the number allowed | 84 | 0 |
| July | 0 | 31 | 0 |
| August | 0 | 25 | 0 |
| September | 0 | 24 | 0 |
| October | 0 | 26 | 0 |
| November | 0 | 37 | 0 |
| December | 0 | 39 | 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 | ||
| 20:00 | 18.1 | |
| 19:00 | 13.6 | |
| 18:00 | 13.7 | |
| 17:00 | 12.4 | |
| 16:00 | 14.2 | |
| 15:00 | 13.8 | |
| 14:00 | 14.4 | |
| 13:00 | 12.6 | |
| 12:00 | 12.4 | |
| 11:00 | 22.3 | |
| 10:00 | 24 | |
| 09:00 | 17.6 | |
| 08:00 | 19.5 | |
| 07:00 | 22.6 | |
| 06:00 | 22.2 | |
| 05:00 | 22.4 | |
| 04:00 | 25.7 | |
| 03:00 | 25 | |
| 02:00 | 23.4 | |
| 01:00 | 22.3 | |
| Tuesday, 10/6 | ||
| 00:00 | 20.1 | |
| 23:00 | 20.9 | |
| 22:00 | 20.5 | |
| 21:00 | 21.2 | |
| 20:00 | 22.9 | |
| 19:00 | 20.9 | |
| 18:00 | 19.8 | |
| 17:00 | 19.5 | |
| 16:00 | 17.4 | |
| 15:00 | 19.3 | |
| 14:00 | 19.9 | |
| 13:00 | 21 | |
| 12:00 | 21.6 | |
| 11:00 | 19.9 | |
| 10:00 | 19.2 | |
| 09:00 | 16.2 | |
| 08:00 | 16.1 | |
| 07:00 | 13.5 | |
| 06:00 | 13.5 | |
| 05:00 | 14.1 | |
| 04:00 | 14.2 | |
| 03:00 | 14.4 | |
| 02:00 | 14 | |
| 01:00 | 14.6 | |
| Monday, 10/5 | ||
| 00:00 | 14.4 | |
| 23:00 | 14.9 | |
| 22:00 | 16.1 | |
| 21:00 | 15.9 | |
| 20:00 | 13.4 | |
| 19:00 | 17.3 | |
| 18:00 | 17.5 | |
| 17:00 | 15 | |
| 16:00 | 15.5 | |
| 15:00 | 14.6 | |
| 14:00 | 17.3 | |
| 13:00 | 18.2 | |
| 12:00 | 21.5 | |
| 11:00 | 16.9 | |
| 10:00 | 23.1 | |
| 09:00 | 14.4 | |
| 08:00 | 13 | |
| 07:00 | 12.8 | |
| 06:00 | 12.2 | |
| 05:00 | 12.9 | |
| 04:00 | 11.1 | |
| 03:00 | 11.2 | |
| 02:00 | 12 | |
| 01:00 | 12.1 | |
| Sunday, 10/4 | ||
| 00:00 | 12.4 | |
| 23:00 | 13.8 | |
| 22:00 | 12.8 | |
| 21:00 | 13.4 | |
| 20:00 | 16.5 | |
| 19:00 | 13.9 | |
| 18:00 | 13.8 | |
| 17:00 | 12.1 | |
| 16:00 | 11.7 | |
| 15:00 | 11.4 | |
| 14:00 | 11.3 | |
| 13:00 | 11.5 | |
| 12:00 | 13.3 | |
| 11:00 | 13 | |
| 10:00 | 12 | |
| 09:00 | 9.9 | |
| 08:00 | 9.3 | |
| 07:00 | 8.6 | |
| 06:00 | 9.9 | |
| 05:00 | 9.7 | |
| 04:00 | 9.7 | |
| 03:00 | 10.1 | |
| 02:00 | 9.9 | |
| 01:00 | 10.3 | |
| Saturday, 10/3 | ||
| 00:00 | 10.8 | |
| 23:00 | 12.6 | |
| 22:00 | 13.3 | |
| 21:00 | 12.7 | |
| 20:00 | 11.4 | |
| 19:00 | 13.3 | |
| 18:00 | 11.2 | |
| 17:00 | 8.9 | |
| 16:00 | 10.9 | |
| 15:00 | 11.1 | |
| 14:00 | 14.4 | |
| 13:00 | 18.4 | |
| 12:00 | 19.2 | |
| 11:00 | 15.3 | |
| 10:00 | 14.4 | |
| 09:00 | 13.2 | |
| 08:00 | 11.3 | |
| 07:00 | 11.1 | |
| 06:00 | 10.9 | |
| 05:00 | 10.4 | |
| 04:00 | 11.1 | |
| 03:00 | 10.7 | |
| 02:00 | 9.3 | |
| 01:00 | 8.4 | |
| Friday, 10/2 | ||
| 00:00 | 9 | |
| 23:00 | 9.7 | |
| 22:00 | 13 | |
| 21:00 | 14.1 | |
| 20:00 | 16.5 | |
| 19:00 | 16.3 | |
| 18:00 | 15.8 | |
| 17:00 | 13.9 | |
| 16:00 | 16.5 | |
| 15:00 | 15.6 | |
| 14:00 | 17.7 | |
| 13:00 | 19.8 | |
| 12:00 | 20.7 | |
| 11:00 | 18.2 | |
| 10:00 | 17.3 | |
| 09:00 | 15.9 | |
| 08:00 | 11.2 | |
| 07:00 | 10.6 | |
| 06:00 | 11.1 | |
| 05:00 | 10.1 | |
| 04:00 | 11 | |
| 03:00 | 9.6 | |
| 02:00 | 10.1 | |
| 01:00 | 10.3 | |
| Thursday, 10/1 | ||
| 00:00 | 11.6 | |
| 23:00 | 12 | |
| 22:00 | 11.8 | |
| 21:00 | 17.3 | |
| 20:00 | 17.6 | |
| 19:00 | 17.8 | |
| 18:00 | 13.9 | |
| 17:00 | 15.7 | |
| 16:00 | 21.2 | |
| 15:00 | 17.4 | |
| 14:00 | 18.7 | |
| 13:00 | 34.6 | |
| 12:00 | 18.2 | |
| 11:00 | 17.3 | |
| 10:00 | 15.8 | |
| 09:00 | 14.7 | |
| 08:00 | 12.2 | |
| 07:00 | 11.1 | |
| 06:00 | 11.1 | |
| 05:00 | 10.5 | |
| 04:00 | 10.6 | |
| 03:00 | 10.7 | |
| 02:00 | 10.1 | |
| 01:00 | 12.8 | |
| Wednesday, 9/30 | ||
| 00:00 | 13.7 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 18.1 | provisional |
| Mon, 10/5 | 15.1 | provisional |
| Sun, 10/4 | 11.7 | provisional |
| Sat, 10/3 | 12.3 | provisional |
| Fri, 10/2 | 13.9 | provisional |
| Thu, 10/1 | 15.2 | provisional |
| Wed, 9/30 | 13.3 | provisional |
| Tue, 9/29 | 13.6 | provisional |
| Mon, 9/28 | 11.9 | provisional |
| Sun, 9/27 | 5.9 | provisional |
| Sat, 9/26 | 5.5 | provisional |
| Fri, 9/25 | 4 | provisional |
| Thu, 9/24 | 9.4 | provisional |
| Wed, 9/23 | 7 | provisional |
| Tue, 9/22 | 6.2 | provisional |
| Mon, 9/21 | 10.6 | provisional |
| Sun, 9/20 | 7.6 | provisional |
| Sat, 9/19 | 7.2 | provisional |
| Fri, 9/18 | 6.7 | provisional |
| Thu, 9/17 | 5.9 | provisional |
| Wed, 9/16 | 6.7 | provisional |
| Tue, 9/15 | 5.8 | provisional |
| Mon, 9/14 | 6.3 | provisional |
| Sun, 9/13 | 5.7 | provisional |
| Sat, 9/12 | 4.6 | provisional |
| Fri, 9/11 | 3.1 | provisional |
| Thu, 9/10 | 8.6 | provisional |
| Wed, 9/9 | 10.9 | provisional |
| Tue, 9/8 | 12.9 | provisional |
| Mon, 9/7 | 7.6 | provisional |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 14.4 | 6.3 | measured in 100 % of hours · provisional · year before: same days |
| September 2026 | 8.2 | 8.7 | measured in 100 % of hours · provisional |
| August 2026 | 14.4 | 13.4 | measured in 100 % of hours · provisional |
| July 2026 | 11.1 | 9 | measured in 100 % of hours · provisional |
| June 2026 | 13 | 16.2 | measured in 99 % of hours · provisional |
| May 2026 | 10.7 | 9 | measured in 100 % of hours · provisional |
| April 2026 | 13.3 | 13.5 | measured in 100 % of hours · provisional |
| March 2026 | 18.8 | 10.7 | measured in 100 % of hours · provisional |
| February 2026 | 11.8 | 24.6 | measured in 99 % of hours · provisional |
| January 2026 | 19.1 | 17.8 | measured in 100 % of hours · provisional |
| December 2025 | 13.7 | 13 | measured in 100 % of hours · verified |
| November 2025 | 13.1 | 17.2 | 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) | 2 | 8 | 8 |
| Annual average, µg/m³ (EU limit 40) | 13.5* | 13 | 15 |
| Highest daily average, µg/m³ | 62January 16 | 81February 24 | 84June 21 |
| Highest hourly value, µg/m³ | 223April 5 | 113February 25 | 148April 1 |
| Hours measured | 100 % | 99 % | 100 % |
| Days without any reading from the station | 0 | 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.
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 12 such days.
- WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2024 there were 12 such days.
- EU from 2030: annual average 20 µg/m³. Average in 2024: 15 µg/m³.
- WHO 2021: annual average 15 µg/m³. Average in 2024: 15 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 |
|---|---|---|
| Jun 21, 2024 | 84 | 1.7 × |
| Apr 1, 2024 | 77 | 1.5 × |
| Mar 31, 2024 | 66 | 1.3 × |
| Feb 1, 2024 | 59 | 1.2 × |
| Feb 5, 2024 | 58 | 1.2 × |
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
7.8
Last 7 daysµg/m³
measured in 100 % of hours · provisional
5
Last 30 daysµg/m³
measured in 100 % of hours · provisional
8.9
Last 12 monthsµg/m³
measured in 100 % of hours · provisional
Months of 2024
| Month | Highest day | No readings |
|---|---|---|
| January | 46 | 0 |
| February | 54 | 0 |
| March | 29 | 0 |
| April | 28 | 0 |
| May | 19 | 0 |
| June | 38 | 0 |
| July | 21 | 0 |
| August | 15 | 0 |
| September | 13 | 0 |
| October | 16 | 0 |
| November | 33 | 0 |
| December | 38 | 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 | 14.8 | |
| 23:00 | 14.6 | |
| 22:00 | 14.6 | |
| 21:00 | 14 | |
| 20:00 | 14 | |
| 19:00 | 12.8 | |
| 18:00 | 12.4 | |
| 17:00 | 11.8 | |
| 16:00 | 10.7 | |
| 15:00 | 10.5 | |
| 14:00 | 10.7 | |
| 13:00 | 10.5 | |
| 12:00 | 9.8 | |
| 11:00 | 9.5 | |
| 10:00 | 9.8 | |
| 09:00 | 8.8 | |
| 08:00 | 9.7 | |
| 07:00 | 8.7 | |
| 06:00 | 8.5 | |
| 05:00 | 9.2 | |
| 04:00 | 8.8 | |
| 03:00 | 9.4 | |
| 02:00 | 8.7 | |
| 01:00 | 9.3 | |
| Monday, 10/5 | ||
| 00:00 | 9.5 | |
| 23:00 | 9.7 | |
| 22:00 | 11 | |
| 21:00 | 10.1 | |
| 20:00 | 8.1 | |
| 19:00 | 8.8 | |
| 18:00 | 8.6 | |
| 17:00 | 8.3 | |
| 16:00 | 8.6 | |
| 15:00 | 8.2 | |
| 14:00 | 9.5 | |
| 13:00 | 9.9 | |
| 12:00 | 11.2 | |
| 11:00 | 9.2 | |
| 10:00 | 10.6 | |
| 09:00 | 9.1 | |
| 08:00 | 8.6 | |
| 07:00 | 8.2 | |
| 06:00 | 7.8 | |
| 05:00 | 7.8 | |
| 04:00 | 7.7 | |
| 03:00 | 7.4 | |
| 02:00 | 7.5 | |
| 01:00 | 7.5 | |
| Sunday, 10/4 | ||
| 00:00 | 8 | |
| 23:00 | 8 | |
| 22:00 | 8 | |
| 21:00 | 8 | |
| 20:00 | 7.9 | |
| 19:00 | 7.8 | |
| 18:00 | 7.1 | |
| 17:00 | 7.1 | |
| 16:00 | 6.6 | |
| 15:00 | 6.8 | |
| 14:00 | 6.4 | |
| 13:00 | 6.3 | |
| 12:00 | 6.8 | |
| 11:00 | 7.7 | |
| 10:00 | 7.2 | |
| 09:00 | 5.9 | |
| 08:00 | 5.7 | |
| 07:00 | 5.6 | |
| 06:00 | 5.7 | |
| 05:00 | 5.8 | |
| 04:00 | 5.8 | |
| 03:00 | 6.1 | |
| 02:00 | 6.1 | |
| 01:00 | 6 | |
| Saturday, 10/3 | ||
| 00:00 | 6.1 | |
| 23:00 | 7 | |
| 22:00 | 6.9 | |
| 21:00 | 6.3 | |
| 20:00 | 5.5 | |
| 19:00 | 5.3 | |
| 18:00 | 4.5 | |
| 17:00 | 4.2 | |
| 16:00 | 4.5 | |
| 15:00 | 5 | |
| 14:00 | 6.2 | |
| 13:00 | 7.3 | |
| 12:00 | 7.8 | |
| 11:00 | 7.5 | |
| 10:00 | 7 | |
| 09:00 | 6.5 | |
| 08:00 | 5.7 | |
| 07:00 | 5.6 | |
| 06:00 | 5.6 | |
| 05:00 | 5.5 | |
| 04:00 | 5.5 | |
| 03:00 | 5.3 | |
| 02:00 | 4.9 | |
| 01:00 | 5 | |
| Friday, 10/2 | ||
| 00:00 | 5.2 | |
| 23:00 | 5.5 | |
| 22:00 | 6.6 | |
| 21:00 | 6.9 | |
| 20:00 | 6.8 | |
| 19:00 | 6.5 | |
| 18:00 | 6.1 | |
| 17:00 | 5.3 | |
| 16:00 | 6.6 | |
| 15:00 | 7 | |
| 14:00 | 7.8 | |
| 13:00 | 8.3 | |
| 12:00 | 8.6 | |
| 11:00 | 9.1 | |
| 10:00 | 8.7 | |
| 09:00 | 7.4 | |
| 08:00 | 5.9 | |
| 07:00 | 5.7 | |
| 06:00 | 5.8 | |
| 05:00 | 5.6 | |
| 04:00 | 5.8 | |
| 03:00 | 5.4 | |
| 02:00 | 5.6 | |
| 01:00 | 6 | |
| Thursday, 10/1 | ||
| 00:00 | 6.8 | |
| 23:00 | 6.7 | |
| 22:00 | 6.8 | |
| 21:00 | 8 | |
| 20:00 | 8.6 | |
| 19:00 | 8.4 | |
| 18:00 | 7.8 | |
| 17:00 | 8.1 | |
| 16:00 | 9.1 | |
| 15:00 | 8.9 | |
| 14:00 | 9.3 | |
| 13:00 | 11.4 | |
| 12:00 | 9 | |
| 11:00 | 9.4 | |
| 10:00 | 8.9 | |
| 09:00 | 8.3 | |
| 08:00 | 7.9 | |
| 07:00 | 7.6 | |
| 06:00 | 7.2 | |
| 05:00 | 6.9 | |
| 04:00 | 6.8 | |
| 03:00 | 7.1 | |
| 02:00 | 6.8 | |
| 01:00 | 7.8 | |
| Wednesday, 9/30 | ||
| 00:00 | 8 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 10.9 | provisional |
| Mon, 10/5 | 8.9 | provisional |
| Sun, 10/4 | 6.8 | provisional |
| Sat, 10/3 | 5.9 | provisional |
| Fri, 10/2 | 6.6 | provisional |
| Thu, 10/1 | 8.1 | provisional |
| Wed, 9/30 | 7.6 | provisional |
| Tue, 9/29 | 9.1 | provisional |
| Mon, 9/28 | 8.5 | provisional |
| Sun, 9/27 | 3.6 | provisional |
| Sat, 9/26 | 2.4 | provisional |
| Fri, 9/25 | 1.8 | provisional |
| Thu, 9/24 | 4.7 | provisional |
| Wed, 9/23 | 3.7 | provisional |
| Tue, 9/22 | 2.8 | provisional |
| Mon, 9/21 | 5.1 | provisional |
| Sun, 9/20 | 4.7 | provisional |
| Sat, 9/19 | 4.3 | provisional |
| Fri, 9/18 | 3.5 | provisional |
| Thu, 9/17 | 3.4 | provisional |
| Wed, 9/16 | 4 | provisional |
| Tue, 9/15 | 3.1 | provisional |
| Mon, 9/14 | 3.6 | provisional |
| Sun, 9/13 | 3.5 | provisional |
| Sat, 9/12 | 2.7 | provisional |
| Fri, 9/11 | 1.3 | provisional |
| Thu, 9/10 | 4.4 | provisional |
| Wed, 9/9 | 5.8 | provisional |
| Tue, 9/8 | 5.7 | provisional |
| Mon, 9/7 | 3.2 | provisional |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 7.8 | 3.7 | measured in 100 % of hours · provisional · year before: same days |
| September 2026 | 4.3 | 4.9 | measured in 100 % of hours · provisional |
| August 2026 | 7.6 | 7.9 | measured in 100 % of hours · provisional |
| July 2026 | 6.5 | 5.1 | measured in 100 % of hours · provisional |
| June 2026 | 7.4 | 10 | measured in 99 % of hours · provisional |
| May 2026 | 5.8 | 5 | measured in 100 % of hours · provisional |
| April 2026 | 7.2 | 7.9 | measured in 100 % of hours · provisional |
| March 2026 | 14.4 | 7.6 | measured in 100 % of hours · provisional |
| February 2026 | 9.8 | 21.3 | measured in 99 % of hours · provisional |
| January 2026 | 16.2 | 14 | measured in 100 % of hours · provisional |
| December 2025 | 11.3 | 10.9 | measured in 100 % of hours · verified |
| November 2025 | 10.3 | 13.8 | measured in 100 % 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) | 8.8* | 9.1 | 10.3 |
| Highest daily average, µg/m³ | 57January 16 | 77February 24 | 54February 5 |
| Highest hourly value, µg/m³ | 88January 16 | 108February 25 | 80January 14 |
| Hours measured | 100 % | 99 % | 100 % |
| Days without any reading from the station | 0 | 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 29 such days.
- WHO 2021: daily 15 µg/m³, at most three to four days a year. In 2024 there were 68 such days.
- EU from 2030: annual average 10 µg/m³. Average in 2024: 10 µg/m³.
- WHO 2021: annual average 5 µg/m³. Average in 2024: 10 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
32.9
Nowµg/m³
Measured at 21:00
15
Last 24 hoursµg/m³
measured in 88 % of hours · provisional
11.3
Last 7 daysµg/m³
measured in 96 % of hours · provisional
9.7
Last 30 daysµg/m³
measured in 94 % of hours · provisional
14.2
Last 12 monthsµg/m³
measured in 93 % of hours · 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 | 48 | 0 |
| March | 0 | 0 | 29 | 0 |
| April | 0 | 0 | 24 | 0 |
| May | 0 | 0 | 21 | 0 |
| June | 0 | 0 | 22 | 0 |
| July | 0 | 0 | 18 | 0 |
| August | 0 | 0 | 20 | 0 |
| September | 0 | 0 | 21 | 0 |
| October | 0 | 0 | 36 | 0 |
| November | 0 | 0 | 36 | 0 |
| December | 0 | 0 | 40 | 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 | ||
| 20:00 | 50.7 | |
| 19:00 | 13.3 | |
| 18:00 | 14.4 | |
| 17:00 | 22 | |
| 16:00 | 17 | |
| 15:00 | 16.4 | |
| 14:00 | 11.9 | |
| 13:00 | 27.1 | |
| 12:00 | 18.8 | |
| 11:00 | 37.1 | |
| 10:00 | 10.9 | |
| 09:00 | 10.2 | |
| 08:00 | 9.4 | |
| 07:00 | 8.2 | |
| 06:00 | 4.4 | |
| 04:00 | 5 | |
| 03:00 | 5 | |
| 02:00 | 5.9 | |
| 01:00 | 7 | |
| Tuesday, 10/6 | ||
| 00:00 | 9.4 | |
| 23:00 | 10.6 | |
| 22:00 | 13.3 | |
| 21:00 | 26 | |
| 20:00 | 42.5 | |
| 19:00 | 21.3 | |
| 18:00 | 14.2 | |
| 17:00 | 10.2 | |
| 16:00 | 7.9 | |
| 15:00 | 10.2 | |
| 14:00 | 12.4 | |
| 13:00 | 20.8 | |
| 12:00 | 25.1 | |
| 11:00 | 33.9 | |
| 10:00 | 27.1 | |
| 09:00 | 21.6 | |
| 08:00 | 25.1 | |
| 07:00 | 16 | |
| 06:00 | 8.5 | |
| 04:00 | 7.3 | |
| 03:00 | 9.5 | |
| 02:00 | 9.5 | |
| 01:00 | 11 | |
| Monday, 10/5 | ||
| 00:00 | 13.8 | |
| 23:00 | 19 | |
| 22:00 | 31.3 | |
| 21:00 | 13.7 | |
| 20:00 | 19.1 | |
| 19:00 | 23.5 | |
| 18:00 | 10.9 | |
| 17:00 | 14.6 | |
| 16:00 | 18.7 | |
| 15:00 | 12.7 | |
| 14:00 | 10.8 | |
| 13:00 | 16.6 | |
| 12:00 | 18.9 | |
| 11:00 | 25.4 | |
| 10:00 | 26.7 | |
| 09:00 | 24.4 | |
| 08:00 | 19.5 | |
| 07:00 | 17.2 | |
| 06:00 | 7.6 | |
| 05:00 | 9.9 | |
| 03:00 | 7.1 | |
| 02:00 | 8.7 | |
| 01:00 | 6.2 | |
| Sunday, 10/4 | ||
| 00:00 | 7.6 | |
| 23:00 | 10 | |
| 22:00 | 11.1 | |
| 21:00 | 10.1 | |
| 20:00 | 17.1 | |
| 19:00 | 16.7 | |
| 18:00 | 6.4 | |
| 17:00 | 5.7 | |
| 16:00 | 4.6 | |
| 15:00 | 4.9 | |
| 14:00 | 3.9 | |
| 13:00 | 5 | |
| 12:00 | 6.1 | |
| 11:00 | 9.5 | |
| 10:00 | 9.3 | |
| 09:00 | 6.1 | |
| 08:00 | 2.6 | |
| 07:00 | 2.4 | |
| 06:00 | 1.6 | |
| 05:00 | 2.2 | |
| 03:00 | 2.2 | |
| 02:00 | 2.3 | |
| 01:00 | 3.1 | |
| Saturday, 10/3 | ||
| 00:00 | 4.6 | |
| 23:00 | 10.8 | |
| 22:00 | 10.9 | |
| 21:00 | 12 | |
| 20:00 | 20.7 | |
| 19:00 | 10.6 | |
| 18:00 | 8.5 | |
| 17:00 | 5.1 | |
| 16:00 | 3.8 | |
| 15:00 | 4.3 | |
| 14:00 | 10.2 | |
| 13:00 | 19.6 | |
| 12:00 | 27.6 | |
| 11:00 | 13.9 | |
| 10:00 | 14.4 | |
| 09:00 | 4.7 | |
| 08:00 | 3.3 | |
| 07:00 | 2.5 | |
| 06:00 | 2.4 | |
| 05:00 | 1.6 | |
| 04:00 | 1.6 | |
| 02:00 | 1.8 | |
| 01:00 | 2.9 | |
| Friday, 10/2 | ||
| 00:00 | 3.2 | |
| 23:00 | 3.8 | |
| 22:00 | 5 | |
| 21:00 | 5.3 | |
| 20:00 | 11.9 | |
| 19:00 | 17.6 | |
| 18:00 | 17.4 | |
| 17:00 | 19.9 | |
| 16:00 | 24.3 | |
| 15:00 | 15.7 | |
| 14:00 | 16.6 | |
| 13:00 | 16.3 | |
| 12:00 | 12.6 | |
| 11:00 | 16.1 | |
| 10:00 | 9.4 | |
| 09:00 | 6.7 | |
| 08:00 | 6.4 | |
| 07:00 | 3.7 | |
| 06:00 | 2.3 | |
| 05:00 | 1.5 | |
| 04:00 | 1.7 | |
| 02:00 | 1.6 | |
| 01:00 | 2.1 | |
| Thursday, 10/1 | ||
| 00:00 | 3.1 | |
| 23:00 | 3.4 | |
| 22:00 | 3.2 | |
| 21:00 | 8 | |
| 20:00 | 15.1 | |
| 19:00 | 26.4 | |
| 18:00 | 10.7 | |
| 17:00 | 9.3 | |
| 16:00 | 11.8 | |
| 15:00 | 10.1 | |
| 14:00 | 10.8 | |
| 13:00 | 18.1 | |
| 12:00 | 20.3 | |
| 11:00 | 15.6 | |
| 10:00 | 13.6 | |
| 09:00 | 5.2 | |
| 08:00 | 4.8 | |
| 07:00 | 2.2 | |
| 06:00 | 1.8 | |
| 05:00 | 0.9 | |
| 04:00 | 1 | |
| 03:00 | 1.5 | |
| 01:00 | 5.6 | |
| Wednesday, 9/30 | ||
| 00:00 | 8.3 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 17.1 | provisional |
| Mon, 10/5 | 16.4 | provisional |
| Sun, 10/4 | 6.5 | provisional |
| Sat, 10/3 | 8.6 | provisional |
| Fri, 10/2 | 9.6 | provisional |
| Thu, 10/1 | 8.8 | provisional |
| Wed, 9/30 | 11.8 | provisional |
| Tue, 9/29 | 9.9 | provisional |
| Mon, 9/28 | 11.7 | provisional |
| Sun, 9/27 | 6.8 | provisional |
| Sat, 9/26 | 7.2 | provisional |
| Fri, 9/25 | 8.1 | provisional |
| Thu, 9/24 | 10.2 | provisional |
| Wed, 9/23 | 9.1 | provisional |
| Tue, 9/22 | 5.4 | provisional |
| Mon, 9/21 | 11.7 | provisional |
| Sun, 9/20 | 6.3 | provisional |
| Sat, 9/19 | 5.8 | provisional |
| Fri, 9/18 | 11.2 | provisional |
| Thu, 9/17 | 8 | provisional |
| Wed, 9/16 | 9.5 | provisional |
| Tue, 9/15 | 9.9 | provisional |
| Mon, 9/14 | 9.2 | provisional |
| Sun, 9/13 | 6.1 | provisional |
| Sat, 9/12 | 8.5 | provisional |
| Fri, 9/11 | 8.7 | provisional |
| Thu, 9/10 | too few readings | |
| Wed, 9/9 | 8.5 | provisional |
| Tue, 9/8 | 17.4 | provisional |
| Mon, 9/7 | 13.9 | provisional |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 11.2 | 7.9 | measured in 96 % of hours · provisional · year before: same days |
| September 2026 | 9.7 | 10.3 | measured in 94 % of hours · provisional |
| August 2026 | 12.4 | 10.9 | measured in 92 % of hours · provisional |
| July 2026 | 10.3 | 9.7 | measured in 96 % of hours · provisional |
| June 2026 | 11.7 | 11.3 | measured in 95 % of hours · provisional |
| May 2026 | 10.5 | 8.8 | measured in 92 % of hours · provisional |
| April 2026 | 14.1 | 13.6 | measured in 96 % of hours · provisional |
| March 2026 | 16.4 | 15.1 | measured in 96 % of hours · provisional |
| February 2026 | 18.8 | 17.7 | measured in 96 % of hours · provisional |
| January 2026 | 19.9 | 16.9 | measured in 95 % of hours · provisional |
| December 2025 | 19.5 | 18.7 | measured in 95 % of hours · verified |
| November 2025 | 14.6 | 17.7 | measured in 85 % of hours · verified |
NO₂ by year
Yardstick: EU limits (Directive 2008/50/EC)
| Measure | 2026* | 2025 | 2024 |
|---|---|---|---|
| Hours above 200 µg/m³ (allowed 18) | 0 | 0² | 0 |
| Hours above 400 µg/m³, three hours in a row (alert threshold) | 0 | 0 | 0 |
| Annual average, µg/m³ (EU limit 40) | 13.7* | 13.5¹ | 15.1 |
| Highest daily average, µg/m³ | 46January 15 | 35January 6 | 50January 31 |
| Highest hourly value, µg/m³ | 94August 15 | 101August 12 | 100April 30 |
| Hours measured | 95 % | 88 % | 95 % |
| Days without any reading from the station | 0 | 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.
¹ Fewer than 90 % of the hours were measured, so we do not compare this average with the limit.
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 was 1 such day.
- WHO 2021: daily 25 µg/m³, at most three to four days a year. In 2024 there were 45 such days.
- EU from 2030: annual average 20 µg/m³. Average in 2024: 15 µg/m³.
- WHO 2021: annual average 10 µg/m³. Average in 2024: 15 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
42.2
Nowµg/m³
Measured at 21:00
80.6
Last 24 hoursµg/m³
measured in 96 % of hours · provisional
96.9
Last 7 daysµg/m³
measured in 100 % of hours · provisional
85.2
Last 30 daysµg/m³
measured in 100 % of hours · provisional
76.3
Last 12 monthsµg/m³
measured in 97 % of hours · provisional
Days in 2024: O₃, 8-hour average above 120 µg/m³
56 days above the limit.
- above the limit
- below the limit
- too few readings for the day
Days above the limit with values (56)
- Apr 8 122
- Apr 13 121
- Apr 15 124
- May 11 133
- May 12 132
- Jun 7 130
- Jun 8 135
- Jun 17 122
- Jun 20 146
- Jun 21 135
- Jun 22 120
- Jun 28 144
- Jun 29 139
- Jun 30 121
- Jul 9 126
- Jul 10 146
- Jul 11 154
- Jul 12 148
- Jul 14 128
- Jul 15 149
- Jul 16 134
- Jul 17 143
- Jul 18 122
- Jul 19 134
- Jul 21 127
- Jul 27 149
- Jul 28 140
- Jul 30 120
- Jul 31 141
- Aug 1 150
- Aug 2 136
- Aug 5 126
- Aug 6 128
- Aug 7 133
- Aug 8 134
- Aug 9 131
- Aug 10 126
- Aug 11 122
- Aug 12 126
- Aug 13 152
- Aug 14 143
- Aug 15 135
- Aug 16 146
- Aug 17 148
- Aug 18 124
- Aug 23 134
- Aug 24 160
- Aug 25 131
- Aug 28 136
- Aug 29 132
- Aug 30 131
- Aug 31 138
- Sep 1 137
- Sep 2 135
- Sep 3 138
- Sep 4 127
Values in µg/m³, limit 120 µg/m³.
Months of 2024
| Month | Days above 120 | Highest 8 h | No readings |
|---|---|---|---|
| January | 0 | 78 | 0 |
| February | 0 | 94 | 0 |
| March | 0 | 114 | 0 |
| April | 3 above the number allowed | 124 | 0 |
| May | 2 above the number allowed | 133 | 0 |
| June | 9 above the number allowed | 146 | 0 |
| July | 15 above the number allowed | 154 | 0 |
| August | 23 above the number allowed | 160 | 0 |
| September | 4 above the number allowed | 138 | 0 |
| October | 0 | 87 | 0 |
| November | 0 | 83 | 0 |
| December | 0 | 79 | 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 | ||
| 21:00 | 24.7 | |
| 20:00 | 13.9 | |
| 19:00 | 56.7 | |
| 18:00 | 58.3 | |
| 17:00 | 61 | |
| 16:00 | 71 | |
| 15:00 | 77.8 | |
| 14:00 | 100.8 | |
| 13:00 | 82.4 | |
| 12:00 | 91.3 | |
| 11:00 | 65.9 | |
| 10:00 | 83.5 | |
| 09:00 | 79.9 | |
| 08:00 | 89.5 | |
| 07:00 | 98.3 | |
| 06:00 | 111.3 | |
| 05:00 | 90.2 | |
| 04:00 | 96.2 | |
| 03:00 | 106.9 | |
| 02:00 | 98.9 | |
| 01:00 | 105.6 | |
| Tuesday, 10/6 | ||
| 00:00 | 95 | |
| 23:00 | 95.6 | |
| 22:00 | 102.8 | |
| 21:00 | 102.8 | |
| 20:00 | 94 | |
| 19:00 | 123.7 | |
| 18:00 | 133.7 | |
| 17:00 | 138.1 | |
| 16:00 | 136.2 | |
| 15:00 | 128.3 | |
| 14:00 | 114.8 | |
| 13:00 | 99 | |
| 12:00 | 84.4 | |
| 11:00 | 59.6 | |
| 10:00 | 54.1 | |
| 09:00 | 64.4 | |
| 08:00 | 53.3 | |
| 07:00 | 64.3 | |
| 06:00 | 76.3 | |
| 05:00 | 66.4 | |
| 04:00 | 76.6 | |
| 03:00 | 66.4 | |
| 02:00 | 81.5 | |
| 01:00 | 75.8 | |
| Monday, 10/5 | ||
| 00:00 | 74.2 | |
| 23:00 | 80.1 | |
| 22:00 | 69.6 | |
| 21:00 | 89.7 | |
| 20:00 | 91.8 | |
| 19:00 | 90.5 | |
| 18:00 | 106.8 | |
| 17:00 | 99.4 | |
| 16:00 | 95.1 | |
| 15:00 | 109.7 | |
| 14:00 | 99.4 | |
| 13:00 | 85.8 | |
| 12:00 | 84.4 | |
| 11:00 | 68.5 | |
| 10:00 | 52.4 | |
| 09:00 | 59.7 | |
| 08:00 | 63.6 | |
| 07:00 | 73.6 | |
| 06:00 | 88.4 | |
| 05:00 | 83.8 | |
| 04:00 | 76.5 | |
| 03:00 | 90 | |
| 02:00 | 98.4 | |
| 01:00 | 109.4 | |
| Sunday, 10/4 | ||
| 00:00 | 108.5 | |
| 23:00 | 105.5 | |
| 22:00 | 109.4 | |
| 21:00 | 111.9 | |
| 20:00 | 109.2 | |
| 19:00 | 116.5 | |
| 18:00 | 130.4 | |
| 17:00 | 132.5 | |
| 16:00 | 135.2 | |
| 15:00 | 130.8 | |
| 14:00 | 131.9 | |
| 13:00 | 125.5 | |
| 12:00 | 119 | |
| 11:00 | 98.3 | |
| 10:00 | 89.8 | |
| 09:00 | 91.8 | |
| 08:00 | 101.2 | |
| 07:00 | 101.5 | |
| 06:00 | 104.7 | |
| 05:00 | 104.7 | |
| 04:00 | 105.4 | |
| 03:00 | 103.2 | |
| 02:00 | 103.2 | |
| 01:00 | 102.3 | |
| Saturday, 10/3 | ||
| 00:00 | 101.7 | |
| 23:00 | 86.4 | |
| 22:00 | 90.1 | |
| 21:00 | 100 | |
| 20:00 | 93.3 | |
| 19:00 | 112.5 | |
| 18:00 | 115.7 | |
| 17:00 | 119.1 | |
| 16:00 | 120.7 | |
| 15:00 | 121.9 | |
| 14:00 | 116.3 | |
| 13:00 | 97.3 | |
| 12:00 | 89.1 | |
| 11:00 | 95.4 | |
| 10:00 | 88.5 | |
| 09:00 | 96.2 | |
| 08:00 | 99.7 | |
| 07:00 | 100.5 | |
| 06:00 | 102 | |
| 05:00 | 103.4 | |
| 04:00 | 104.5 | |
| 03:00 | 103.5 | |
| 02:00 | 103.2 | |
| 01:00 | 102.1 | |
| Friday, 10/2 | ||
| 00:00 | 102.9 | |
| 23:00 | 100.7 | |
| 22:00 | 99.1 | |
| 21:00 | 95.2 | |
| 20:00 | 86.4 | |
| 19:00 | 84.3 | |
| 18:00 | 87.1 | |
| 17:00 | 84.4 | |
| 16:00 | 80.2 | |
| 15:00 | 92.6 | |
| 14:00 | 92.2 | |
| 13:00 | 89.5 | |
| 12:00 | 96.4 | |
| 11:00 | 90.1 | |
| 10:00 | 94 | |
| 09:00 | 95.5 | |
| 08:00 | 95.3 | |
| 07:00 | 97.2 | |
| 06:00 | 100.4 | |
| 05:00 | 102 | |
| 04:00 | 101.2 | |
| 03:00 | 101 | |
| 02:00 | 102.2 | |
| 01:00 | 100.7 | |
| Thursday, 10/1 | ||
| 00:00 | 100 | |
| 23:00 | 101.1 | |
| 22:00 | 95.5 | |
| 21:00 | 91 | |
| 20:00 | 84 | |
| 19:00 | 83.2 | |
| 18:00 | 111.5 | |
| 17:00 | 117.9 | |
| 16:00 | 119.8 | |
| 15:00 | 118.6 | |
| 14:00 | 113.9 | |
| 13:00 | 97.5 | |
| 12:00 | 88.1 | |
| 11:00 | 82.7 | |
| 10:00 | 81.6 | |
| 09:00 | 90.4 | |
| 08:00 | 94.3 | |
| 07:00 | 100 | |
| 06:00 | 99.6 | |
| 05:00 | 101.9 | |
| 04:00 | 101.1 | |
| 03:00 | 100.3 | |
| 02:00 | 99.5 | |
| 01:00 | 88.4 | |
| Wednesday, 9/30 | ||
| 00:00 | 89.9 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 121.4 | above the limit · provisional |
| Mon, 10/5 | 112.6 | provisional |
| Sun, 10/4 | 127.7 | above the limit · provisional |
| Sat, 10/3 | 112.4 | provisional |
| Fri, 10/2 | 101.1 | provisional |
| Thu, 10/1 | 106.3 | provisional |
| Wed, 9/30 | 110.1 | provisional |
| Tue, 9/29 | 110.2 | provisional |
| Mon, 9/28 | 102.3 | provisional |
| Sun, 9/27 | 103.8 | provisional |
| Sat, 9/26 | 99.5 | provisional |
| Fri, 9/25 | 80.7 | provisional |
| Thu, 9/24 | 75.9 | provisional |
| Wed, 9/23 | 91.2 | provisional |
| Tue, 9/22 | 86.7 | provisional |
| Mon, 9/21 | 81.6 | provisional |
| Sun, 9/20 | 101.9 | provisional |
| Sat, 9/19 | 80 | provisional |
| Fri, 9/18 | 89.5 | provisional |
| Thu, 9/17 | 100.8 | provisional |
| Wed, 9/16 | 115.3 | provisional |
| Tue, 9/15 | 99.7 | provisional |
| Mon, 9/14 | 123 | above the limit · provisional |
| Sun, 9/13 | 110.1 | provisional |
| Sat, 9/12 | 87.8 | provisional |
| Fri, 9/11 | 66 | provisional |
| Thu, 9/10 | 91.7 | provisional |
| Wed, 9/9 | 117.3 | provisional |
| Tue, 9/8 | 138.7 | above the limit · provisional |
| Mon, 9/7 | 117.3 | provisional |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 97.2 | 60.9 | measured in 100 % of hours · provisional · year before: same days |
| September 2026 | 86.8 | 69 | measured in 100 % of hours · provisional |
| August 2026 | 114.2 | 87.2 | measured in 92 % of hours · provisional |
| July 2026 | 110.9 | 90.6 | measured in 100 % of hours · provisional |
| June 2026 | 96.5 | 101.6 | measured in 97 % of hours · provisional |
| May 2026 | 95.5 | 85.6 | measured in 97 % of hours · provisional |
| April 2026 | 90.6 | 79 | measured in 98 % of hours · provisional |
| March 2026 | 70.6 | 71.6 | measured in 96 % of hours · provisional |
| February 2026 | 49.2 | 53.1 | measured in 97 % of hours · provisional |
| January 2026 | 45.4 | 46.8 | measured in 98 % of hours · provisional |
| December 2025 | 36.1 | 44.3 | measured in 96 % of hours · verified |
| November 2025 | 52.8 | 45.6 | measured in 96 % 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) | 102 | 47 | 56 |
| Annual average, µg/m³ | 85* | 69.3 | 69 |
| Highest 8-hour average, µg/m³ | 181August 6 | 163June 19 | 160August 24 |
| Hours measured | 97 % | 96 % | 96 % |
| Days without any reading from the station | 0 | 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.
■ 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 |
|---|---|---|
| Aug 24, 2024 | 160 | 1.3 × |
| Jul 11, 2024 | 154 | 1.3 × |
| Aug 13, 2024 | 152 | 1.3 × |
| Aug 1, 2024 | 150 | 1.3 × |
| Jul 27, 2024 | 149 | 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: 0
Timeline of outages from October 7, 2025 to today
In the last 12 months this station had no outage of 24 hours or longer.
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 Slovenian Environment Agency. 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.