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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)

All figures by year and month

Good

Air now · Measured at 18:00

Latest values

Latest value: 18:00

Readings
PollutantValueLevel
PM1014.5 µg/m³Good

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

14.5

Nowµg/m³

Measured at 18:00

27.2

Last 24 hoursµg/m³

measured in 92 % 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 2025: PM10, daily average above 50 µg/m³

11 days above the limit.

1102031JanJan 1: 64 µg/m³, above the limitJan 22: 54 µg/m³, above the limitFebFeb 5: 53 µg/m³, above the limitFeb 6: 53 µg/m³, above the limitFeb 8: 61 µg/m³, above the limitFeb 9: 70 µg/m³, above the limitFeb 10: 63 µg/m³, above the limitFeb 21: 60 µg/m³, above the limitMarMar 8: 55 µg/m³, above the limitMar 9: 50 µg/m³, above the limitAprMayJunJulAugSepOctNovDecDec 1: 58 µg/m³, above the limit
  • above the limit
  • below the limit
Days above the limit with values (11)
  1. Jan 1 64
  2. Jan 22 54
  3. Feb 5 53
  4. Feb 6 53
  5. Feb 8 61
  6. Feb 9 70
  7. Feb 10 63
  8. Feb 21 60
  9. Mar 8 55
  10. Mar 9 50
  11. Dec 1 58

Values in µg/m³, limit 50 µg/m³.

Months of 2025

MonthDays above 50Highest dayNo readings
January2 above the number allowed640
February6 above the number allowed700
March2 above the number allowed550
April0240
May0310
June0330
July0270
August0280
September0170
October0240
November0460
December1 above the number allowed580

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.

Last 7 days, every hour: PM10 in µg/m³highest 50 µg/m³, latest 14 µg/m³ (18:00)0204060ThuFriSatSunMonTueWedlatest 14 (18:00)
measuredmodel estimate, not counted
Last 7 days, every hour: PM10 in µg/m³
Values as a table
Hour toµg/m³Note
Wednesday, 10/7
19:0026model estimate, not counted
18:0014.5
17:0026.7
16:0024
15:0020.6
14:0031.6
13:0028.5
12:0034.4
11:0034.6
10:0028.3
09:0022.2
08:0025.2
07:0021.5
06:0019.3
05:0020.5
04:0022.2
03:0022.9
02:0024.3
01:0027.1
Tuesday, 10/6
00:0031.7
23:0039.6
22:0043.3
21:0036.5
20:0042.7
19:0038.4
18:0048.1
17:0047.4
16:0035.1
15:0036.4
14:0043.4
13:0044.9
12:0040.3
11:0032
10:0024.8
09:0020.6
08:0023.6
07:0025.7
06:0020.4
05:0020.2
04:0022.4
03:0023.7
02:0023
01:0025
Monday, 10/5
00:0027.2
23:0040.8
22:0050.1
21:0048.2
20:0037.5
19:0030.6
18:0022.6
17:0022.8
16:0025.4
15:0025.9
14:0031.3
13:0025.4
12:0023.5
11:0020.9
10:0017.7
09:0016.3
08:0015.7
07:0016.8
06:0014.6
05:0015.2
04:0015.5
03:0015.1
02:0016.8
01:0019.9
Sunday, 10/4
00:0020.6
23:0026.9
22:0022.5
21:0024.5
20:0025.2
19:0022
18:0023.3
17:0020.1
16:0020.6
15:0019.4
14:0018.8
13:0018.2
12:0017.5
11:0014.8
10:0014.5
09:0015.4
08:0014.8
07:0016.9
06:0022.2
05:0032.9
04:0044
03:0044.7
02:0033.3
01:0022.5
Saturday, 10/3
00:0027.3
23:0026.5
22:0019.2
21:0024.6
20:0020.4
19:0015.7
18:0014.7
17:0014.4
16:0017.7
15:0016.1
14:0020.7
13:0021.3
12:0020.7
11:0020.6
10:0023.5
09:0028.5
08:0018.7
07:0015.5
06:0013.7
05:0013.9
04:0014.3
03:0015.1
02:0018.8
01:0019.3
Friday, 10/2
00:0024.9
23:0032.1
22:0027.4
21:0028.8
20:0023.3
19:0018.1
18:0016.2
17:0015
16:0017.5
15:0018.5
14:0023.1
13:0023.9
12:0028.6
11:0030.3
10:0025.5
09:0018.5
08:0023
07:0031.5
06:0015.9
05:0013.4
04:0015.4
03:0017.6
02:0015.8
01:0018.9
Thursday, 10/1
00:0023.4
23:0025.1
22:0024.6
21:0030
20:0041.5
19:0031.1
18:0014
17:0014.1
16:0013.5
15:0016.5
14:0018.5
13:0018.2
12:0023.1
11:0020.6
10:0018.1
09:0012.3
08:0014.8
07:0013.2
06:0012.8
05:0013.8
04:0015.2
03:0017.3
02:0018.8
01:0021
Wednesday, 9/30
00:0022.8
23:0030.1
22:0027.9
Last 30 days, daily average: PM10 in µg/m³highest 41 µg/m³, latest 33 µg/m³02040609/99/169/239/30highest 41latest 33
EU daily limit, 50 µg/m³
Last 30 days, daily average: PM10 in µg/m³
Values as a table
Dayµg/m³Note
Tue, 10/632.9provisional
Mon, 10/524.8provisional
Sun, 10/423.1provisional
Sat, 10/319.2provisional
Fri, 10/221.8provisional
Thu, 10/119.6provisional
Wed, 9/3019.5provisional
Tue, 9/2920.9provisional
Mon, 9/2819.1provisional
Sun, 9/2713.5provisional
Sat, 9/269.5provisional
Fri, 9/2510.9provisional
Thu, 9/2415.2provisional
Wed, 9/239.8provisional
Tue, 9/229.5provisional
Mon, 9/2112.8provisional
Sun, 9/208.8provisional
Sat, 9/1910.3provisional
Fri, 9/1811.8provisional
Thu, 9/179.5provisional
Wed, 9/1611.1provisional
Tue, 9/159.1provisional
Mon, 9/149.8provisional
Sun, 9/138.2provisional
Sat, 9/126.8provisional
Fri, 9/112.9provisional
Thu, 9/106.4provisional
Wed, 9/917.2provisional
Tue, 9/840.7provisional
Mon, 9/728.2provisional
Last 12 months, monthly average: PM10 in µg/m³highest 28 µg/m³, latest 24 µg/m³0204060DecFebAprJunAugOcthighest 28latest 24
Last 12 monthsthis month so fara year earlierEU annual limit, 40 µg/m³month with days without data from the station
Last 12 months, monthly average: PM10 in µg/m³
Values as a table
Monthµg/m³a year earlierNote
October 2026 so far23.610.7measured in 100 % of hours · provisional · year before: same days
September 202614.99.6measured in 97 % of hours · provisional
August 202617.913.7measured in 78 % of hours · provisional · 3 days without data from the station
July 20261510.5measured in 100 % of hours · provisional
June 202615.520.1measured in 99 % of hours · provisional
May 202613.911.1measured in 100 % of hours · provisional
April 202616.114.8measured in 100 % of hours · provisional
March 202619.718.6measured in 100 % of hours · provisional
February 202619.635.4measured in 100 % of hours · provisional
January 20262820.2measured in 100 % of hours · provisional
December 202523.130.4measured in 100 % of hours · verified
November 202520.127.8measured in 100 % of hours · verified

PM10 by year

Yardstick: EU limits (Directive 2008/50/EC)

Measure2026*20252024
Days above 50 µg/m³ (allowed 35)51120
Annual average, µg/m³ (EU limit 40)18*17.420.3
Highest daily average, µg/m³78January 2370February 977April 1
Highest hourly value, µg/m³345May 26208July 1208April 1
Hours measured97 %100 %100 %
Days without any reading from the station300

* 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 2025 there were 17 such days.
  • WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2025 there were 17 such days.
  • EU from 2030: annual average 20 µg/m³. Average in 2025: 17 µg/m³.
  • WHO 2021: annual average 15 µg/m³. Average in 2025: 17 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 2025

DayAverageTimes the limit
Feb 9, 2025701.4 ×
Jan 1, 2025641.3 ×
Feb 10, 2025631.3 ×
Feb 8, 2025611.2 ×
Feb 21, 2025601.2 ×

Daily average in µg/m³, daily limit 50 µg/m³. Days with the same unverified value over many hours are not on this list.

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

FromToDuration
Aug 28, 2026 20:00Sep 1, 2026 20:004 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.

How we measure

samoEKO is a brand of samoLabs, Juelich.