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Air at the CE Ljubljanska station

Celje, Slovenia

Network: Slovenian Environment Agency · Station code: SI0076A

This year, up to yesterday (October 7)

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.

Worst day: January 23, 2026, PM10 95 µg/m³ as a daily average, 1.9 times the limit.

Daily average for 280 of 280 days · data for 2026 not yet finally verified · Yardstick: EU limits (Directive 2008/50/EC)

All figures by year and month

Fair

Air now · Measured at 00:00

Latest values

Latest value: 00:00

Readings
PollutantValueLevel
PM1032.9 µg/m³Fair

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 23.8 µg/m³, week before 16 µg/m³
  • PM2.5: average 12.5 µg/m³, week before 9.2 µg/m³

Last month there was less PM10 and PM2.5 in the air than the month before.

  • PM10: average 11.6 µg/m³, month before 15.1 µg/m³
  • PM2.5: average 5.7 µg/m³, month before 7.7 µg/m³

Show

Particulate matter PM10

32.9

Nowµg/m³

Measured at 00:00

27.2

Last 24 hoursµg/m³

measured in 92 % of hours · provisional

23.8

Last 7 daysµg/m³

measured in 99 % of hours · provisional

14.5

Last 30 daysµg/m³

measured in 100 % of hours · provisional

too few readings

Last 12 months

measured in 77 % of hours · 2 months with too few readings · provisional

Days in 2026: PM10, daily average above 50 µg/m³

5 days above the limit.

1102031JanJan 9: 61 µg/m³, above the limitJan 22: 59 µg/m³, above the limitJan 23: 95 µg/m³, above the limitJan 24: 93 µg/m³, above the limitJan 25: 54 µg/m³, above the limitFebMarAprMayJunJulAugSepOctNovDec
  • above the limit
  • below the limit
Days above the limit with values (5)
  1. Jan 9 61
  2. Jan 22 59
  3. Jan 23 95
  4. Jan 24 93
  5. Jan 25 54

Values in µg/m³, limit 50 µg/m³.

Months of 2026

MonthDays above 50Highest dayNo readings
January5 above the number allowed950
February0380
March0430
April0270
May0230
June0310
July0250
August0290
September0230
October up to yesterday0280

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 59 µg/m³, latest 26 µg/m³ (23:00)0255075ThuFriSatSunMonTueWedlatest 26 (23:00)
measuredmodel estimate, not counted
Last 7 days, every hour: PM10 in µg/m³
Values as a table
Hour toµg/m³Note
Wednesday, 10/7
00:0027model estimate, not counted
23:0026.4
22:0027.2
21:0020.5
20:0023
19:0016.9
18:0016.6
17:0015.1
16:0014.1
15:0014.2
14:0016.9
13:0014.7
12:0030.2
11:0059
10:0051.6
09:0041.5
08:0038.5
07:0035.4
06:0027.3
05:0026.3
04:0026.8
03:0025.8
02:0029.7
01:0030.7
Tuesday, 10/6
00:0031.3
23:0033.9
22:0034
21:0035.6
20:0034.8
19:0025.2
18:0023.9
17:0022.4
16:0021.4
15:0022.5
14:0019.7
13:0020.8
12:0027.6
11:0033.3
10:0044.5
09:0046
08:0033.3
07:0022.7
06:0021.5
05:0018.3
04:0018.1
03:0019.4
02:0027.7
01:0030.6
Monday, 10/5
00:0027.1
23:0027.4
22:0028.8
21:0027.3
20:0026.3
19:0035.9
18:0032.2
17:0026
16:0020.4
15:0023.2
14:0022.8
13:0023.6
12:0026.6
11:0043.7
10:0050.9
09:0050.8
08:0032
07:0027.5
06:0018.7
05:0016.2
04:0014
03:0015.5
02:0018.2
01:0019.8
Sunday, 10/4
00:0022.8
23:0029.4
22:0023.6
21:0024.7
20:0037.4
19:0043.2
18:0032.5
17:0015.5
16:0013.3
15:0013.9
14:0015.6
13:0016.2
12:0016.8
11:0019.8
10:0019.8
09:0017.8
08:0012.6
07:0011.6
06:0012.9
05:0015
04:0017
03:0018.6
02:0020.7
01:0019.2
Saturday, 10/3
00:0018.3
23:0022.5
22:0023.3
21:0017.6
20:0021.5
19:0020.2
18:0017.3
17:0015.4
16:0020.2
15:0020.2
14:0022.8
13:0025
12:0019.8
11:0017.5
10:0019.1
09:0018.9
08:0015.8
07:0014.7
06:0012.5
05:0011.8
04:0013.8
03:0014.2
02:0015.6
01:0016.4
Friday, 10/2
00:0017.9
23:0021.3
22:0024.8
21:0024.3
20:0030.2
19:0031.9
18:0016.6
17:0016.5
16:0017.3
15:0018.8
14:0028
13:0024.2
12:0026.6
11:0033
10:0030.6
09:0034.3
08:0031
07:0021.5
06:0016.5
05:0015.7
04:0015.4
03:0017.9
02:0019
01:0016.6
Thursday, 10/1
00:0015.5
23:0022.3
22:0028.2
21:0027.9
20:0039.5
19:0033.7
18:0016.8
17:0018.4
16:0016.3
15:0015.7
14:0020.4
13:0029.1
12:0028.5
11:0029.6
10:0029.2
09:0031.2
08:0029.5
07:0022
06:0013.2
05:0011.3
04:0011.9
03:0014.2
Last 30 days, daily average: PM10 in µg/m³highest 28 µg/m³, latest 27 µg/m³02040609/109/179/2410/1latest 27
EU daily limit, 50 µg/m³
Last 30 days, daily average: PM10 in µg/m³
Values as a table
Dayµg/m³Note
Wed, 10/727.3provisional
Tue, 10/627.9provisional
Mon, 10/527.3provisional
Sun, 10/420.4provisional
Sat, 10/318.1provisional
Fri, 10/222.9provisional
Thu, 10/122.8provisional
Wed, 9/3019.1provisional
Tue, 9/2921.5provisional
Mon, 9/2823.1provisional
Sun, 9/2712.4provisional
Sat, 9/268.7provisional
Fri, 9/259.4provisional
Thu, 9/2418provisional
Wed, 9/2310.7provisional
Tue, 9/2210.8provisional
Mon, 9/2110.8provisional
Sun, 9/209.6provisional
Sat, 9/1910.2provisional
Fri, 9/188.9provisional
Thu, 9/1711.3provisional
Wed, 9/1610.4provisional
Tue, 9/158.2provisional
Mon, 9/148.7provisional
Sun, 9/137.4provisional
Sat, 9/128.1provisional
Fri, 9/115.6provisional
Thu, 9/105.5provisional
Wed, 9/916provisional
Tue, 9/814.1provisional
Last 12 months, monthly average: PM10 in µg/m³highest 32 µg/m³, latest 24 µg/m³0204060DecFebAprJunAugOcthighest 32latest 24
Last 12 monthsthis month so fara year earlierEU annual limit, 40 µg/m³
Last 12 months, monthly average: PM10 in µg/m³
Values as a table
Monthµg/m³a year earlierNote
October 2026 so far23.8measured in 99 % of hours · provisional
September 202611.6measured in 100 % of hours · provisional
August 202615.1measured in 100 % of hours · provisional
July 202612.5measured in 100 % of hours · provisional
June 202614measured in 100 % of hours · provisional
May 202612measured in 100 % of hours · provisional
April 202617.8measured in 100 % of hours · provisional
March 202625.7measured in 100 % of hours · provisional
February 202625.1measured in 100 % of hours · provisional
January 202632.1measured in 100 % of hours · provisional
December 2025too few readings
November 2025too few readings

PM10 by year

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

Measure2026*
Days above 50 µg/m³ (allowed 35)5
Annual average, µg/m³ (EU limit 40)18.5*
Highest daily average, µg/m³95January 23
Highest hourly value, µg/m³112January 24
Hours measured100 %
Days without any reading from the station0

* 2026 up to October 7; 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 6 such days.
  • WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2026 there were 6 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

DayAverageTimes the limit
Jan 23, 2026provisional951.9 ×
Jan 24, 2026provisional931.9 ×
Jan 9, 2026provisional611.2 ×
Jan 22, 2026provisional591.2 ×
Jan 25, 2026provisional541.1 ×

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

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 8, 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.

How we measure

samoEKO is a brand of samoLabs, Juelich.