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Air at the Trbovlje2 station

Trbovlje, Slovenia

Network: Slovenian Environment Agency · Station code: SI0074A

This year, up to yesterday (October 7)

3 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: 5 days above the limit, 35 allowed.

Worst day: January 23, 2026, PM10 76 µg/m³ as a daily average, 1.5 times the limit.

Daily average for 278 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
PM1019.7 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 16 µg/m³, week before 11.1 µg/m³
  • PM2.5: average 10.5 µg/m³, week before 7.8 µg/m³

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

  • PM10: average 8.7 µg/m³, month before 11.7 µg/m³
  • PM2.5: average 4.9 µg/m³, month before 6.9 µg/m³

Show

Particulate matter PM10

19.7

Nowµg/m³

Measured at 00:00

18.3

Last 24 hoursµg/m³

measured in 88 % of hours · provisional

16

Last 7 daysµg/m³

measured in 99 % of hours · provisional

10.5

Last 30 daysµg/m³

measured in 100 % of hours · provisional

14.6

Last 12 monthsµg/m³

measured in 99 % of hours · provisional

Days in 2024: PM10, daily average above 50 µg/m³

12 days above the limit.

1102031JanJan 11: 53 µg/m³, above the limitJan 21: 51 µg/m³, above the limitJan 31: 54 µg/m³, above the limitFebFeb 1: 54 µg/m³, above the limitMarMar 30: 52 µg/m³, above the limitMar 31: 66 µg/m³, above the limitAprApr 1: 91 µg/m³, above the limitMayJunJun 21: 55 µg/m³, above the limitJulAugSepOctNovDecDec 28: 50 µg/m³, above the limitDec 29: 50 µg/m³, above the limitDec 30: 55 µg/m³, above the limitDec 31: 68 µg/m³, above the limit
  • above the limit
  • below the limit
Days above the limit with values (12)
  1. Jan 11 53
  2. Jan 21 51
  3. Jan 31 54
  4. Feb 1 54
  5. Mar 30 52
  6. Mar 31 66
  7. Apr 1 91
  8. Jun 21 55
  9. Dec 28 50
  10. Dec 29 50
  11. Dec 30 55
  12. Dec 31 68

Values in µg/m³, limit 50 µg/m³.

Months of 2024

MonthDays above 50Highest dayNo readings
January3 above the number allowed540
February1 above the number allowed540
March2 above the number allowed660
April1 above the number allowed910
May0280
June1 above the number allowed550
July0250
August0200
September0240
October0300
November0490
December4 above the number allowed680

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 26 µg/m³, latest 15 µg/m³ (22:00)0102030ThuFriSatSunMonTueWedlatest 15 (22:00)
measuredmodel estimate, not counted
Last 7 days, every hour: PM10 in µg/m³
Values as a table
Hour toµg/m³Note
Wednesday, 10/7
00:0021model estimate, not counted
23:0023model estimate, not counted
22:0015
21:0016.7
20:0017.5
19:0019.5
18:0017.1
17:0016.9
16:0015.8
15:0015.5
14:0015.8
13:0016.3
12:0017.3
11:0019.3
10:0020.6
09:0024.4
08:0021.3
07:0019.7
06:0018.9
05:0019.8
04:0018.5
03:0019.1
02:0020.1
01:0021.3
Tuesday, 10/6
00:0021
23:0023.5
22:0023.8
21:0026.5
20:0026.2
19:0024.9
18:0022.3
17:0020.6
16:0019.1
15:0016.6
14:0020.5
13:0021.5
12:0019.9
11:0017.5
10:0019.4
09:0016.4
08:0014.7
07:0016
06:0014.6
05:0012.7
04:0013
03:0013.4
02:0014.7
01:0014.7
Monday, 10/5
00:0016.1
23:0017.3
22:0021.4
21:0020.2
20:0024.3
19:0019.9
18:0016
17:0012.5
16:0013.1
15:0015.5
14:0022.3
13:0020.6
12:0020.1
11:0019
10:0016.3
09:0016
08:0013.8
07:0011.5
06:0011.2
05:0011
04:0011.2
03:0011.2
02:0011.6
01:0012.7
Sunday, 10/4
00:0013.2
23:0015.8
22:0017.1
21:0018.6
20:0019.8
19:0019.9
18:0017.5
17:0013.8
16:0014.8
15:0015.1
14:0017.5
13:0016.4
12:0015.2
11:0014.9
10:0014.8
09:0012
08:0010.6
07:0010.2
06:0011
05:0011.2
04:0010.5
03:0011.8
02:0011.7
01:0013.4
Saturday, 10/3
00:0014.2
23:0017.3
22:0017.3
21:0018
20:0018.6
19:0020.8
18:0015.4
17:0012.7
16:0012.1
15:0012.5
14:0015.8
13:0018.7
12:0017.8
11:0016.3
10:0011.9
09:0012.3
08:0011.5
07:0010.1
06:009.6
05:009.8
04:009.7
03:0010.4
02:0012.3
01:0013.2
Friday, 10/2
00:0015.5
23:0017
22:0016.3
21:0018.7
20:0025.6
19:0020.6
18:0017.7
17:0015.6
16:0015.7
15:0014
14:0014.6
13:0019.6
12:0020.7
11:0021.8
10:0019.1
09:0018.6
08:0014.9
07:0014.1
06:0018.2
05:0010.1
04:009.7
03:0010.1
02:0010.6
01:0011.7
Thursday, 10/1
00:0013.8
23:0014.8
22:0015.6
21:0016.1
20:0018.8
19:0018.7
18:0014.3
17:0010.4
16:0010.4
15:0013.4
14:0012.4
13:0013.9
12:0018
11:0018.7
10:0014.6
09:0019.8
08:0014.3
07:0012.2
06:0010.9
05:0010.6
04:0010.3
03:0011.7
Last 30 days, daily average: PM10 in µg/m³highest 19 µg/m³, latest 18 µg/m³01020309/109/179/2410/1latest 18
Last 30 days, daily average: PM10 in µg/m³
Values as a table
Dayµg/m³Note
Wed, 10/718.5provisional
Tue, 10/618.9provisional
Mon, 10/516provisional
Sun, 10/414.4provisional
Sat, 10/314.1provisional
Fri, 10/216.3provisional
Thu, 10/114.1provisional
Wed, 9/3013provisional
Tue, 9/2914.7provisional
Mon, 9/2816.3provisional
Sun, 9/2710.7provisional
Sat, 9/266.1provisional
Fri, 9/255.8provisional
Thu, 9/2410.9provisional
Wed, 9/237.1provisional
Tue, 9/227.2provisional
Mon, 9/219provisional
Sun, 9/208provisional
Sat, 9/199.7provisional
Fri, 9/188.1provisional
Thu, 9/178.7provisional
Wed, 9/167.6provisional
Tue, 9/155.7provisional
Mon, 9/147.4provisional
Sun, 9/137provisional
Sat, 9/125.4provisional
Fri, 9/114provisional
Thu, 9/105.2provisional
Wed, 9/911.3provisional
Tue, 9/813.1provisional
Last 12 months, monthly average: PM10 in µg/m³highest 25 µg/m³, latest 16 µg/m³0204060DecFebAprJunAugOcthighest 25latest 16
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 far168.6measured in 99 % of hours · provisional · year before: same days
September 20268.78.3measured in 99 % of hours · provisional
August 202611.711.2measured in 97 % of hours · provisional
July 2026108.4measured in 100 % of hours · provisional
June 202611.613.6measured in 100 % of hours · provisional
May 20269.28.8measured in 100 % of hours · provisional
April 202612.512.5measured in 100 % of hours · provisional
March 202617.514.1measured in 100 % of hours · provisional
February 202617.630.4measured in 100 % of hours · provisional
January 202624.818.9measured in 99 % of hours · provisional
December 202521.725.5measured in 100 % of hours · verified
November 202517.723measured in 100 % of hours · verified

PM10 by year

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

Measure2026*20252024
Days above 50 µg/m³ (allowed 35)3512
Annual average, µg/m³ (EU limit 40)13.8*14.617.5
Highest daily average, µg/m³76January 2365February 991April 1
Highest hourly value, µg/m³101January 23148January 1200April 1
Hours measured99 %100 %100 %
Days without any reading from the station000

* 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 2024 there were 17 such days.
  • WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2024 there were 17 such days.
  • EU from 2030: annual average 20 µg/m³. Average in 2024: 18 µg/m³.
  • WHO 2021: annual average 15 µg/m³. Average in 2024: 18 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

DayAverageTimes the limit
Apr 1, 2024911.8 ×
Dec 31, 2024681.4 ×
Mar 31, 2024661.3 ×
Jun 21, 2024551.1 ×
Dec 30, 2024551.1 ×

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.