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 2026: PM10, daily average above 50 µg/m³
2 days above the limit.
- above the limit
- below the limit
Days above the limit with values (2)
- Jan 15 56
- Jan 16 62
Values in µg/m³, limit 50 µg/m³.
Months of 2026
| Month | Days above 50 | Highest day | No readings |
|---|---|---|---|
| January | 2 above the number allowed | 62 | 0 |
| February | 0 | 38 | 0 |
| March | 0 | 42 | 0 |
| April | 0 | 33 | 0 |
| May | 0 | 27 | 0 |
| June | 0 | 29 | 0 |
| July | 0 | 23 | 0 |
| August | 0 | 30 | 0 |
| September | 0 | 14 | 0 |
| October up to yesterday | 0 | 18 | 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 2026 there were 2 such days.
- WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2026 there were 2 such days.
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 2026
| Day | Average | Times the limit |
|---|---|---|
| Jan 16, 2026provisional | 62 | 1.2 × |
| Jan 15, 2026provisional | 56 | 1.1 × |
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 2026
| Month | Highest day | No readings |
|---|---|---|
| January | 57 | 0 |
| February | 32 | 0 |
| March | 39 | 0 |
| April | 16 | 0 |
| May | 15 | 0 |
| June | 19 | 0 |
| July | 14 | 0 |
| August | 15 | 0 |
| September | 9 | 0 |
| October up to yesterday | 11 | 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 2026 there were 12 such days.
- WHO 2021: daily 15 µg/m³, at most three to four days a year. In 2026 there were 32 such days.
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 2026: 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 2026
| Month | Days with an hour above 200 | Hours above 200 | Highest day | No readings |
|---|---|---|---|---|
| January | 0 | 0 | 46 | 0 |
| February | 0 | 0 | 38 | 0 |
| March | 0 | 0 | 33 | 0 |
| April | 0 | 0 | 31 | 0 |
| May | 0 | 0 | 16 | 0 |
| June | 0 | 0 | 22 | 0 |
| July | 0 | 0 | 17 | 0 |
| August | 0 | 0 | 22 | 0 |
| September | 0 | 0 | 17 | 0 |
| October up to yesterday | 0 | 0 | 17 | 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 2026 there were 0 such days.
- WHO 2021: daily 25 µg/m³, at most three to four days a year. In 2026 there were 19 such days.
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 2026: O₃, 8-hour average above 120 µg/m³
102 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 (102)
- Apr 6 121
- Apr 7 125
- Apr 18 121
- Apr 23 123
- Apr 24 129
- Apr 25 124
- Apr 26 154
- Apr 27 148
- Apr 28 134
- May 1 120
- May 2 120
- May 3 131
- May 4 123
- May 9 135
- May 19 122
- May 20 138
- May 22 121
- May 23 133
- May 24 134
- May 25 128
- May 26 150
- May 27 154
- May 28 135
- May 29 130
- May 30 134
- May 31 144
- Jun 9 129
- Jun 13 129
- Jun 14 141
- Jun 17 123
- Jun 18 158
- Jun 19 134
- Jun 20 125
- Jun 21 152
- Jun 22 137
- Jun 23 149
- Jun 24 148
- Jun 25 141
- Jun 26 145
- Jun 27 151
- Jun 28 147
- Jun 29 146
- Jun 30 135
- Jul 1 148
- Jul 3 159
- Jul 4 136
- Jul 5 137
- Jul 6 130
- Jul 7 135
- Jul 8 124
- Jul 9 125
- Jul 11 135
- Jul 12 152
- Jul 13 131
- Jul 14 128
- Jul 15 148
- Jul 16 158
- Jul 17 148
- Jul 18 147
- Jul 19 149
- Jul 20 136
- Jul 21 130
- Jul 23 122
- Jul 24 123
- Jul 26 130
- Jul 27 139
- Jul 28 132
- Jul 29 146
- Jul 30 166
- Jul 31 168
- Aug 1 177
- Aug 2 140
- Aug 3 146
- Aug 4 146
- Aug 5 148
- Aug 6 181
- Aug 7 159
- Aug 8 131
- Aug 9 144
- Aug 10 159
- Aug 11 141
- Aug 12 135
- Aug 13 139
- Aug 14 157
- Aug 15 152
- Aug 16 155
- Aug 17 138
- Aug 18 144
- Aug 19 147
- Aug 20 139
- Aug 21 132
- Aug 24 131
- Aug 26 124
- Aug 27 141
- Sep 2 127
- Sep 3 127
- Sep 4 139
- Sep 5 143
- Sep 8 139
- Sep 14 123
- Oct 4 128
- Oct 6 121
Values in µg/m³, limit 120 µg/m³.
Months of 2026
| Month | Days above 120 | Highest 8 h | No readings |
|---|---|---|---|
| January | 0 | 81 | 0 |
| February | 0 | 82 | 0 |
| March | 0 | 120 | 0 |
| April | 9 above the number allowed | 154 | 0 |
| May | 17 above the number allowed | 154 | 0 |
| June | 17 above the number allowed | 158 | 0 |
| July | 27 above the number allowed | 168 | 0 |
| August | 24 above the number allowed | 181 | 0 |
| September | 6 above the number allowed | 143 | 0 |
| October up to yesterday | 2 above the number allowed | 128 | 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 2026
| Day | Highest 8 h | Times the limit |
|---|---|---|
| Aug 6, 2026provisional | 181 | 1.5 × |
| Aug 1, 2026provisional | 177 | 1.5 × |
| Jul 31, 2026provisional | 168 | 1.4 × |
| Jul 30, 2026provisional | 166 | 1.4 × |
| Aug 10, 2026provisional | 159 | 1.3 × |
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.