Skip to content

Air at the Hrastnik station

Hrastnik, Slovenia

Network: Slovenian Environment Agency · Station code: SI0037A

This year, up to yesterday (October 6)

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.

Worst day: January 23, 2026, PM10 88 µg/m³ as a daily average, 1.8 times the limit.

Daily average for 276 of 279 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 19:00

Latest values

Latest value: 19:00

Readings
PollutantValueLevel
PM1018.5 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 19.5 µg/m³, week before 12.6 µg/m³
  • PM2.5: average 10.5 µg/m³, week before 7.5 µg/m³

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

  • PM10: average 11.2 µg/m³, month before 14.8 µg/m³
  • PM2.5: average 5.3 µg/m³, month before 7.2 µg/m³

Show

Particulate matter PM10

18.5

Nowµg/m³

Measured at 19:00

24.7

Last 24 hoursµg/m³

measured in 92 % of hours · provisional

19.5

Last 7 daysµg/m³

measured in 96 % of hours · provisional

12.8

Last 30 daysµg/m³

measured in 99 % of hours · provisional

too few readings

Last 12 months

measured in 76 % of hours · 2 months with too few readings · provisional

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

3 days above the limit. 1 day without any reading from the station.

1102031JanJan 22: 64 µg/m³, above the limitJan 23: 88 µg/m³, above the limitJan 24: 65 µg/m³, above the limitFebMarAprMayJunJulJul 14: no data from the stationAugSepOctNovDec
  • above the limit
  • below the limit
  • too few readings for the day
  • no data from the station
Days above the limit with values (3)
  1. Jan 22 64
  2. Jan 23 88
  3. Jan 24 65

Values in µg/m³, limit 50 µg/m³.

Months of 2026

MonthDays above 50Highest dayNo readings
January3 above the number allowed880
February0360
March0350
April0260
May0210
June0280
July0251
August0280
September0200
October up to yesterday0230

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 54 µg/m³, latest 23 µg/m³ (18:00)0255075ThuFriSatSunMonTueWedlatest 23 (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
19:0023model estimate, not counted
18:0023.1
17:0024.8
16:0016.8
15:0014.3
14:0018.8
13:0018.9
12:0019.8
11:0022.8
10:0036.1
09:0053.6
08:0044.9
07:0025.7
06:0021
05:0020.4
04:0020.5
03:0020.4
02:0020.2
01:0020.8
Tuesday, 10/6
00:0021.6
23:0023
22:0025.8
21:0030.3
20:0031
19:0031.5
18:0027.1
17:0031.7
16:0019.6
15:0026.5
14:0019.6
13:0017.8
12:0021.5
11:0040.2
10:0032.8
09:0029.9
08:0035.7
07:0016.6
06:0012.8
05:0011.9
04:0012.6
03:0013.1
02:0013.5
01:0014.3
Monday, 10/5
00:0016.9
23:0018.9
22:0024.1
21:0023.1
20:0023.4
19:0034.5
18:0039.5
17:0017.2
16:0012.6
15:0018
14:0019.3
13:0024.7
12:0030.5
11:0031.3
10:0027.5
09:0033.2
08:0027.7
07:0015
06:0012.2
05:0010.6
04:0011.2
03:0012.1
02:0014
01:0013.9
Sunday, 10/4
00:0015.5
23:0015.6
22:0016
21:0020.4
20:0020.6
19:0025
18:0027.2
17:0018.2
16:0014.7
15:0014.4
08:0010.4
07:0010.3
06:0010
05:0010.4
04:0013.5
03:0014.2
02:0012.2
01:0014.9
Saturday, 10/3
00:0017.8
23:0019.8
22:0019.7
21:0021.4
20:0023.9
19:0028.6
18:0028.8
17:0014.4
16:0013.5
15:0013
14:0015.7
13:0018.8
12:0014.8
11:0016.2
10:0015.1
09:0013.7
08:0012
07:0010.3
06:0011.6
05:009.8
04:009.6
03:0010.4
02:0011.6
01:0013.3
Friday, 10/2
00:0015.5
23:0017.3
22:0019.4
21:0023.5
20:0025.2
19:0048
18:0033.1
17:0020.1
16:0015.4
15:0015.5
14:0016.5
13:0017.9
12:0023.1
11:0025.9
10:0029.2
09:0026.5
08:0021.5
07:0014.9
06:0011.3
05:009.4
04:009.6
03:0010
02:0013.2
01:0010.2
Thursday, 10/1
00:0011.2
23:0011.9
22:0014.6
21:0016.8
20:0014.8
19:0029.9
18:0013.3
17:0014.7
16:0015.9
15:0012
14:0012.6
13:0013.9
12:0020.7
11:0024.7
10:0032.6
09:0050.1
08:0027.7
07:0022.8
06:0019.8
05:0020.2
04:0024.2
03:0021.6
02:0017.4
01:0019
Wednesday, 9/30
00:0013.6
23:0014.2
22:0014.9
Last 30 days, daily average: PM10 in µg/m³highest 23 µg/m³, latest 23 µg/m³02040609/99/169/239/30highest 23
EU daily limit, 50 µg/m³
Last 30 days, daily average: PM10 in µg/m³
Values as a table
Dayµg/m³Note
Tue, 10/623.3provisional
Mon, 10/521.3provisional
Sun, 10/415.7provisional
Sat, 10/316provisional
Fri, 10/219.7provisional
Thu, 10/120.1provisional
Wed, 9/3019.1provisional
Tue, 9/2917.9provisional
Mon, 9/2819.5provisional
Sun, 9/2711.1provisional
Sat, 9/267.7provisional
Fri, 9/257.5provisional
Thu, 9/2412.9provisional
Wed, 9/2311.7provisional
Tue, 9/2210.8provisional
Mon, 9/2110.9provisional
Sun, 9/208.3provisional
Sat, 9/1910provisional
Fri, 9/189.4provisional
Thu, 9/1713.6provisional
Wed, 9/1611.1provisional
Tue, 9/157.3provisional
Mon, 9/148.7provisional
Sun, 9/137.6provisional
Sat, 9/127.1provisional
Fri, 9/114.5provisional
Thu, 9/105.3provisional
Wed, 9/915.3provisional
Tue, 9/815.7provisional
Mon, 9/713.9provisional
Last 12 months, monthly average: PM10 in µg/m³highest 25 µg/m³, latest 20 µg/m³0204060DecFebAprJunAugOcthighest 25latest 20
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 far19.5measured in 96 % of hours · provisional
September 202611.2measured in 100 % of hours · provisional
August 202614.8measured in 100 % of hours · provisional
July 202612.3measured in 93 % of hours · provisional · 1 day without data from the station
June 202613.3measured in 100 % of hours · provisional
May 202611.1measured in 100 % of hours · provisional
April 202614.5measured in 100 % of hours · provisional
March 202620.2measured in 100 % of hours · provisional
February 202620.2measured in 100 % of hours · provisional
January 202624.9measured 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)3
Annual average, µg/m³ (EU limit 40)15.9*
Highest daily average, µg/m³88January 23
Highest hourly value, µg/m³124January 23
Hours measured99 %
Days without any reading from the station1

* 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 3 such days.
  • WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2026 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 2026

DayAverageTimes the limit
Jan 23, 2026provisional881.8 ×
Jan 24, 2026provisional651.3 ×
Jan 22, 2026provisional641.3 ×

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: 2

1 outage, 46 hours in total in the last 12 months.

Timeline of outages from October 7, 2025 to today

FromToDuration
Jul 13, 2026 16:00Jul 15, 2026 14:0046 hours

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.