Air at the LJ Vič station
Ljubljana, Slovenia
Network: Slovenian Environment Agency · Station code: SI0075A
This year, up to yesterday (October 6)
5 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: 11 days above the limit, 35 allowed.
Worst day: January 23, 2026, PM10 78 µg/m³ as a daily average, 1.6 times the limit.
Daily average for 269 of 279 days · data for 2026 not yet finally verified · Yardstick: EU limits (Directive 2008/50/EC)
Fair
Air now · Measured at 21:00
Latest values
Latest value: 21:00
| Pollutant | Value | Level |
|---|---|---|
| PM10 | 28.1 µg/m³ | Fair |
How the air is changing
Over the last seven days there was more PM10 and PM2.5 in the air than the week before.
- PM10: average 23 µg/m³, week before 14.1 µg/m³
- PM2.5: average 14.5 µg/m³, week before 9 µg/m³
Last month there was less PM10 and PM2.5 in the air than the month before.
- PM10: average 14.9 µg/m³, month before 17.9 µg/m³
- PM2.5: average 7.1 µg/m³, month before 8.8 µg/m³
Show
Particulate matter PM10
28.1
Nowµg/m³
Measured at 21:00
25.4
Last 24 hoursµg/m³
measured in 96 % of hours · provisional
23
Last 7 daysµg/m³
measured in 100 % of hours · provisional
15.4
Last 30 daysµg/m³
measured in 100 % of hours · provisional
18.3
Last 12 monthsµg/m³
measured in 98 % of hours · provisional
Days in 2023: PM10, daily average above 50 µg/m³
2 days above the limit.
- above the limit
- below the limit
- no PM10 data in the EEA database
Days above the limit with values (2)
- Dec 19 50
- Dec 20 62
Values in µg/m³, limit 50 µg/m³.
Months of 2023
| Month | Days above 50 | Highest day | No readings |
|---|---|---|---|
| January | 0 | ||
| February | 0 | ||
| March | 0 | ||
| April | 0 | ||
| May | 0 | ||
| June | 0 | ||
| July | 0 | ||
| August | 0 | ||
| September | 0 | ||
| October | 0 | ||
| November | 0 | ||
| December | 2 above the number allowed | 62 | 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 | 33 | model estimate, not counted |
| 21:00 | 28.1 | |
| 20:00 | 18 | |
| 19:00 | 19.5 | |
| 18:00 | 14.5 | |
| 17:00 | 26.7 | |
| 16:00 | 24 | |
| 15:00 | 20.6 | |
| 14:00 | 31.6 | |
| 13:00 | 28.5 | |
| 12:00 | 34.4 | |
| 11:00 | 34.6 | |
| 10:00 | 28.3 | |
| 09:00 | 22.2 | |
| 08:00 | 25.2 | |
| 07:00 | 21.5 | |
| 06:00 | 19.3 | |
| 05:00 | 20.5 | |
| 04:00 | 22.2 | |
| 03:00 | 22.9 | |
| 02:00 | 24.3 | |
| 01:00 | 27.1 | |
| Tuesday, 10/6 | ||
| 00:00 | 31.7 | |
| 23:00 | 39.6 | |
| 22:00 | 43.3 | |
| 21:00 | 36.5 | |
| 20:00 | 42.7 | |
| 19:00 | 38.4 | |
| 18:00 | 48.1 | |
| 17:00 | 47.4 | |
| 16:00 | 35.1 | |
| 15:00 | 36.4 | |
| 14:00 | 43.4 | |
| 13:00 | 44.9 | |
| 12:00 | 40.3 | |
| 11:00 | 32 | |
| 10:00 | 24.8 | |
| 09:00 | 20.6 | |
| 08:00 | 23.6 | |
| 07:00 | 25.7 | |
| 06:00 | 20.4 | |
| 05:00 | 20.2 | |
| 04:00 | 22.4 | |
| 03:00 | 23.7 | |
| 02:00 | 23 | |
| 01:00 | 25 | |
| Monday, 10/5 | ||
| 00:00 | 27.2 | |
| 23:00 | 40.8 | |
| 22:00 | 50.1 | |
| 21:00 | 48.2 | |
| 20:00 | 37.5 | |
| 19:00 | 30.6 | |
| 18:00 | 22.6 | |
| 17:00 | 22.8 | |
| 16:00 | 25.4 | |
| 15:00 | 25.9 | |
| 14:00 | 31.3 | |
| 13:00 | 25.4 | |
| 12:00 | 23.5 | |
| 11:00 | 20.9 | |
| 10:00 | 17.7 | |
| 09:00 | 16.3 | |
| 08:00 | 15.7 | |
| 07:00 | 16.8 | |
| 06:00 | 14.6 | |
| 05:00 | 15.2 | |
| 04:00 | 15.5 | |
| 03:00 | 15.1 | |
| 02:00 | 16.8 | |
| 01:00 | 19.9 | |
| Sunday, 10/4 | ||
| 00:00 | 20.6 | |
| 23:00 | 26.9 | |
| 22:00 | 22.5 | |
| 21:00 | 24.5 | |
| 20:00 | 25.2 | |
| 19:00 | 22 | |
| 18:00 | 23.3 | |
| 17:00 | 20.1 | |
| 16:00 | 20.6 | |
| 15:00 | 19.4 | |
| 14:00 | 18.8 | |
| 13:00 | 18.2 | |
| 12:00 | 17.5 | |
| 11:00 | 14.8 | |
| 10:00 | 14.5 | |
| 09:00 | 15.4 | |
| 08:00 | 14.8 | |
| 07:00 | 16.9 | |
| 06:00 | 22.2 | |
| 05:00 | 32.9 | |
| 04:00 | 44 | |
| 03:00 | 44.7 | |
| 02:00 | 33.3 | |
| 01:00 | 22.5 | |
| Saturday, 10/3 | ||
| 00:00 | 27.3 | |
| 23:00 | 26.5 | |
| 22:00 | 19.2 | |
| 21:00 | 24.6 | |
| 20:00 | 20.4 | |
| 19:00 | 15.7 | |
| 18:00 | 14.7 | |
| 17:00 | 14.4 | |
| 16:00 | 17.7 | |
| 15:00 | 16.1 | |
| 14:00 | 20.7 | |
| 13:00 | 21.3 | |
| 12:00 | 20.7 | |
| 11:00 | 20.6 | |
| 10:00 | 23.5 | |
| 09:00 | 28.5 | |
| 08:00 | 18.7 | |
| 07:00 | 15.5 | |
| 06:00 | 13.7 | |
| 05:00 | 13.9 | |
| 04:00 | 14.3 | |
| 03:00 | 15.1 | |
| 02:00 | 18.8 | |
| 01:00 | 19.3 | |
| Friday, 10/2 | ||
| 00:00 | 24.9 | |
| 23:00 | 32.1 | |
| 22:00 | 27.4 | |
| 21:00 | 28.8 | |
| 20:00 | 23.3 | |
| 19:00 | 18.1 | |
| 18:00 | 16.2 | |
| 17:00 | 15 | |
| 16:00 | 17.5 | |
| 15:00 | 18.5 | |
| 14:00 | 23.1 | |
| 13:00 | 23.9 | |
| 12:00 | 28.6 | |
| 11:00 | 30.3 | |
| 10:00 | 25.5 | |
| 09:00 | 18.5 | |
| 08:00 | 23 | |
| 07:00 | 31.5 | |
| 06:00 | 15.9 | |
| 05:00 | 13.4 | |
| 04:00 | 15.4 | |
| 03:00 | 17.6 | |
| 02:00 | 15.8 | |
| 01:00 | 18.9 | |
| Thursday, 10/1 | ||
| 00:00 | 23.4 | |
| 23:00 | 25.1 | |
| 22:00 | 24.6 | |
| 21:00 | 30 | |
| 20:00 | 41.5 | |
| 19:00 | 31.1 | |
| 18:00 | 14 | |
| 17:00 | 14.1 | |
| 16:00 | 13.5 | |
| 15:00 | 16.5 | |
| 14:00 | 18.5 | |
| 13:00 | 18.2 | |
| 12:00 | 23.1 | |
| 11:00 | 20.6 | |
| 10:00 | 18.1 | |
| 09:00 | 12.3 | |
| 08:00 | 14.8 | |
| 07:00 | 13.2 | |
| 06:00 | 12.8 | |
| 05:00 | 13.8 | |
| 04:00 | 15.2 | |
| 03:00 | 17.3 | |
| 02:00 | 18.8 | |
| 01:00 | 21 | |
| Wednesday, 9/30 | ||
| 00:00 | 22.8 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 32.9 | provisional |
| Mon, 10/5 | 24.8 | provisional |
| Sun, 10/4 | 23.1 | provisional |
| Sat, 10/3 | 19.2 | provisional |
| Fri, 10/2 | 21.8 | provisional |
| Thu, 10/1 | 19.6 | provisional |
| Wed, 9/30 | 19.5 | provisional |
| Tue, 9/29 | 20.9 | provisional |
| Mon, 9/28 | 19.1 | provisional |
| Sun, 9/27 | 13.5 | provisional |
| Sat, 9/26 | 9.5 | provisional |
| Fri, 9/25 | 10.9 | provisional |
| Thu, 9/24 | 15.2 | provisional |
| Wed, 9/23 | 9.8 | provisional |
| Tue, 9/22 | 9.5 | provisional |
| Mon, 9/21 | 12.8 | provisional |
| Sun, 9/20 | 8.8 | provisional |
| Sat, 9/19 | 10.3 | provisional |
| Fri, 9/18 | 11.8 | provisional |
| Thu, 9/17 | 9.5 | provisional |
| Wed, 9/16 | 11.1 | provisional |
| Tue, 9/15 | 9.1 | provisional |
| Mon, 9/14 | 9.8 | provisional |
| Sun, 9/13 | 8.2 | provisional |
| Sat, 9/12 | 6.8 | provisional |
| Fri, 9/11 | 2.9 | provisional |
| Thu, 9/10 | 6.4 | provisional |
| Wed, 9/9 | 17.2 | provisional |
| Tue, 9/8 | 40.7 | provisional |
| Mon, 9/7 | 28.2 | provisional |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 23.6 | 10.7 | measured in 100 % of hours · provisional · year before: same days |
| September 2026 | 14.9 | 9.6 | measured in 97 % of hours · provisional |
| August 2026 | 17.9 | 13.7 | measured in 78 % of hours · provisional · 3 days without data from the station |
| July 2026 | 15 | 10.5 | measured in 100 % of hours · provisional |
| June 2026 | 15.5 | 20.1 | measured in 99 % of hours · provisional |
| May 2026 | 13.9 | 11.1 | measured in 100 % of hours · provisional |
| April 2026 | 16.1 | 14.8 | measured in 100 % of hours · provisional |
| March 2026 | 19.7 | 18.6 | measured in 100 % of hours · provisional |
| February 2026 | 19.6 | 35.4 | measured in 100 % of hours · provisional |
| January 2026 | 28 | 20.2 | measured in 100 % of hours · provisional |
| December 2025 | 23.1 | 30.4 | measured in 100 % of hours · verified |
| November 2025 | 20.1 | 27.8 | 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) | 5 | 11 | 20 |
| Annual average, µg/m³ (EU limit 40) | 18* | 17.4 | 20.3 |
| Highest daily average, µg/m³ | 78January 23 | 70February 9 | 77April 1 |
| Highest hourly value, µg/m³ | 345May 26 | 208July 1 | 208April 1 |
| Hours measured | 97 % | 100 % | 100 % |
| Days without any reading from the station | 3 | 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.
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 2023 there were 3 such days.
- WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2023 there were 3 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 2023
| Day | Average | Times the limit |
|---|---|---|
| Dec 20, 2023 | 62 | 1.2 × |
| Dec 19, 2023 | 50 | 1.0 × |
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
14.5
Last 7 daysµg/m³
measured in 100 % of hours · provisional
8.6
Last 30 daysµg/m³
measured in 100 % of hours · provisional
12.5
Last 12 monthsµg/m³
measured in 98 % of hours · provisional
Months of 2023
| Month | Highest day | No readings |
|---|---|---|
| January | 56 | 0 |
| February | 66 | 0 |
| March | 37 | 0 |
| April | 20 | 0 |
| May | 14 | 0 |
| June | 20 | 0 |
| July | 16 | 0 |
| August | 19 | 0 |
| September | 19 | 0 |
| October | 24 | 0 |
| November | 38 | 0 |
| December | 59 | 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 | 22.3 | |
| 23:00 | 26.6 | |
| 22:00 | 28.6 | |
| 21:00 | 24.1 | |
| 20:00 | 30.2 | |
| 19:00 | 22.7 | |
| 18:00 | 21.4 | |
| 17:00 | 19.6 | |
| 16:00 | 17.4 | |
| 15:00 | 21.9 | |
| 14:00 | 23.7 | |
| 13:00 | 25.4 | |
| 12:00 | 26.5 | |
| 11:00 | 23.7 | |
| 10:00 | 20.6 | |
| 09:00 | 17.4 | |
| 08:00 | 17.7 | |
| 07:00 | 19.7 | |
| 06:00 | 18 | |
| 05:00 | 18.2 | |
| 04:00 | 18.2 | |
| 03:00 | 19.2 | |
| 02:00 | 18.6 | |
| 01:00 | 19.6 | |
| Monday, 10/5 | ||
| 00:00 | 21 | |
| 23:00 | 30.9 | |
| 22:00 | 35.4 | |
| 21:00 | 28.1 | |
| 20:00 | 21.9 | |
| 19:00 | 15.9 | |
| 18:00 | 12.5 | |
| 17:00 | 12.6 | |
| 16:00 | 12.2 | |
| 15:00 | 13.8 | |
| 14:00 | 16.8 | |
| 13:00 | 15.5 | |
| 12:00 | 15.3 | |
| 11:00 | 14.4 | |
| 10:00 | 13.3 | |
| 09:00 | 14.2 | |
| 08:00 | 13.5 | |
| 07:00 | 13.8 | |
| 06:00 | 11.1 | |
| 05:00 | 12.2 | |
| 04:00 | 12.4 | |
| 03:00 | 12.6 | |
| 02:00 | 13.3 | |
| 01:00 | 14.9 | |
| Sunday, 10/4 | ||
| 00:00 | 14.9 | |
| 23:00 | 19.9 | |
| 22:00 | 14.9 | |
| 21:00 | 17.8 | |
| 20:00 | 15.1 | |
| 19:00 | 10.8 | |
| 18:00 | 9.4 | |
| 17:00 | 9.3 | |
| 16:00 | 9.8 | |
| 15:00 | 10.3 | |
| 14:00 | 11.6 | |
| 13:00 | 12.4 | |
| 12:00 | 12.6 | |
| 11:00 | 11.3 | |
| 10:00 | 11.1 | |
| 09:00 | 11.9 | |
| 08:00 | 13 | |
| 07:00 | 15.1 | |
| 06:00 | 19.9 | |
| 05:00 | 29.6 | |
| 04:00 | 39.7 | |
| 03:00 | 40.9 | |
| 02:00 | 28.9 | |
| 01:00 | 17.1 | |
| Saturday, 10/3 | ||
| 00:00 | 20.2 | |
| 23:00 | 19.5 | |
| 22:00 | 12 | |
| 21:00 | 14.3 | |
| 20:00 | 11.9 | |
| 19:00 | 8.4 | |
| 18:00 | 7.5 | |
| 17:00 | 7.6 | |
| 16:00 | 8.6 | |
| 15:00 | 9 | |
| 14:00 | 10.1 | |
| 13:00 | 10.7 | |
| 12:00 | 12.7 | |
| 11:00 | 13.2 | |
| 10:00 | 13.1 | |
| 09:00 | 13.7 | |
| 08:00 | 11.8 | |
| 07:00 | 10.7 | |
| 06:00 | 9.7 | |
| 05:00 | 9.9 | |
| 04:00 | 10.1 | |
| 03:00 | 10.9 | |
| 02:00 | 12.8 | |
| 01:00 | 13.2 | |
| Friday, 10/2 | ||
| 00:00 | 15.6 | |
| 23:00 | 20.2 | |
| 22:00 | 15.7 | |
| 21:00 | 15.9 | |
| 20:00 | 11.7 | |
| 19:00 | 9.1 | |
| 18:00 | 7.4 | |
| 17:00 | 7.1 | |
| 16:00 | 8.2 | |
| 15:00 | 8.9 | |
| 14:00 | 11.4 | |
| 13:00 | 11.2 | |
| 12:00 | 13.6 | |
| 11:00 | 14.1 | |
| 10:00 | 12.8 | |
| 09:00 | 11.8 | |
| 08:00 | 12.2 | |
| 07:00 | 12.9 | |
| 06:00 | 10.6 | |
| 05:00 | 10.1 | |
| 04:00 | 10.2 | |
| 03:00 | 11.2 | |
| 02:00 | 11.5 | |
| 01:00 | 13.2 | |
| Thursday, 10/1 | ||
| 00:00 | 15 | |
| 23:00 | 14.7 | |
| 22:00 | 12.9 | |
| 21:00 | 13.2 | |
| 20:00 | 12.2 | |
| 19:00 | 9.5 | |
| 18:00 | 7 | |
| 17:00 | 7.3 | |
| 16:00 | 7.3 | |
| 15:00 | 9.9 | |
| 14:00 | 9.9 | |
| 13:00 | 11.2 | |
| 12:00 | 15.1 | |
| 11:00 | 14.3 | |
| 10:00 | 12.8 | |
| 09:00 | 10.7 | |
| 08:00 | 11 | |
| 07:00 | 10 | |
| 06:00 | 9.8 | |
| 05:00 | 10.4 | |
| 04:00 | 11.7 | |
| 03:00 | 12.6 | |
| 02:00 | 13.5 | |
| 01:00 | 14.8 | |
| Wednesday, 9/30 | ||
| 00:00 | 15.5 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 21.7 | provisional |
| Mon, 10/5 | 16.6 | provisional |
| Sun, 10/4 | 17 | provisional |
| Sat, 10/3 | 11.7 | provisional |
| Fri, 10/2 | 11.9 | provisional |
| Thu, 10/1 | 11.5 | provisional |
| Wed, 9/30 | 11.3 | provisional |
| Tue, 9/29 | 14 | provisional |
| Mon, 9/28 | 14.1 | provisional |
| Sun, 9/27 | 10.1 | provisional |
| Sat, 9/26 | 5.3 | provisional |
| Fri, 9/25 | 6.6 | provisional |
| Thu, 9/24 | 7.8 | provisional |
| Wed, 9/23 | 5.2 | provisional |
| Tue, 9/22 | 5.3 | provisional |
| Mon, 9/21 | 7.3 | provisional |
| Sun, 9/20 | 5.7 | provisional |
| Sat, 9/19 | 6 | provisional |
| Fri, 9/18 | 7.1 | provisional |
| Thu, 9/17 | 5.7 | provisional |
| Wed, 9/16 | 5.3 | provisional |
| Tue, 9/15 | 5.7 | provisional |
| Mon, 9/14 | 5.3 | provisional |
| Sun, 9/13 | 5.2 | provisional |
| Sat, 9/12 | 4.1 | provisional |
| Fri, 9/11 | 1.7 | provisional |
| Thu, 9/10 | 3.6 | provisional |
| Wed, 9/9 | 7.7 | provisional |
| Tue, 9/8 | 10 | provisional |
| Mon, 9/7 | 8.1 | provisional |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 15.1 | 7.2 | measured in 100 % of hours · provisional · year before: same days |
| September 2026 | 7.1 | 5.5 | measured in 97 % of hours · provisional |
| August 2026 | 8.8 | 8 | measured in 79 % of hours · provisional · 3 days without data from the station |
| July 2026 | 7.3 | 5.4 | measured in 100 % of hours · provisional |
| June 2026 | 7.7 | 10.7 | measured in 100 % of hours · provisional |
| May 2026 | 6.6 | 6.8 | measured in 100 % of hours · provisional |
| April 2026 | 9.3 | 8.2 | measured in 100 % of hours · provisional |
| March 2026 | 13.7 | 12.3 | measured in 100 % of hours · provisional |
| February 2026 | 15.5 | 30.1 | measured in 100 % of hours · provisional |
| January 2026 | 25 | 17.6 | measured in 100 % of hours · provisional |
| December 2025 | 20.8 | 27.6 | measured in 100 % of hours · verified |
| November 2025 | 16.7 | 23.5 | 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) | 11.4* | 12.5 | 14.8 |
| Highest daily average, µg/m³ | 63January 23 | 67February 9 | 69December 31 |
| Highest hourly value, µg/m³ | 94January 23 | 136January 1 | 130December 31 |
| Hours measured | 97 % | 100 % | 100 % |
| Days without any reading from the station | 3 | 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 2023 there were 49 such days.
- WHO 2021: daily 15 µg/m³, at most three to four days a year. In 2023 there were 136 such days.
- EU from 2030: annual average 10 µg/m³. Average in 2023: 15 µg/m³.
- WHO 2021: annual average 5 µg/m³. Average in 2023: 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.
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: 4
1 outage, 96 hours in total in the last 12 months.
Timeline of outages from October 7, 2025 to today
| From | To | Duration |
|---|---|---|
| Aug 28, 2026 20:00 | Sep 1, 2026 20:00 | 4 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 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.