Skip to content

Air at the Zagorje station

Zagorje ob Savi, Slovenia

Network: Slovenian Environment Agency · Station code: SI0036A

This year, up to yesterday (October 6)

29 days

with an 8-hour average of ozone (O₃) above the target value of 120 µg/m³.

The target value allows 25 such days a year, averaged over three years.

4 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: September 4, 2026, O₃ 155 µg/m³ as a daily average, 1.3 times the limit.

Daily average for 259 of 279 days · data for 2026 not yet finally verified · Yardstick: EU limits (Directive 2008/50/EC)

All figures by year and month

Moderate

Air now · Measured at 21:00

Latest values

Latest value: 21:00

Readings
PollutantValueLevel
PM1028.3 µg/m³Fair
NO₂32.6 µg/m³Moderate
O₃31.7 µg/m³Good
SO₂2.2 µg/m³Good

How the air is changing

Over the last seven days there was more PM10, PM2.5, and NO₂ in the air than the week before.

  • PM10: average 18.6 µg/m³, week before 12.3 µg/m³
  • PM2.5: average 11.2 µg/m³, week before 7.4 µg/m³
  • NO₂: average 16.7 µg/m³, week before 10.4 µg/m³
  • O₃: average 34.7 µg/m³, week before 33.1 µg/m³
  • SO₂: too few readings to compare

Last month there was less PM10, PM2.5, and O₃ in the air than the month before.

  • PM10: average 10.9 µg/m³, month before 14.1 µg/m³
  • PM2.5: average 5.3 µg/m³, month before 7.2 µg/m³
  • NO₂: average 9.8 µg/m³, month before 10.1 µg/m³
  • O₃: average 43.3 µg/m³, month before 76.5 µg/m³
  • SO₂: too few readings to compare

Show

Ozone O₃

31.7

Nowµg/m³

Measured at 21:00

38.3

Last 24 hoursµg/m³

measured in 96 % of hours · provisional

34.7

Last 7 daysµg/m³

measured in 100 % of hours · provisional

35.6

Last 30 daysµg/m³

measured in 100 % of hours · provisional

45.8

Last 12 monthsµg/m³

measured in 91 % of hours · provisional

Days in 2026: O₃, 8-hour average above 120 µg/m³

29 days above the limit.

1102031JanFebMarAprApr 25: 132 µg/m³, above the limitApr 26: 129 µg/m³, above the limitMayMay 4: 121 µg/m³, above the limitJunJun 14: 132 µg/m³, above the limitJun 26: 125 µg/m³, above the limitJun 27: 130 µg/m³, above the limitJun 29: 120 µg/m³, above the limitJun 30: 128 µg/m³, above the limitJulJul 26: 127 µg/m³, above the limitJul 27: 122 µg/m³, above the limitJul 30: 130 µg/m³, above the limitJul 31: 137 µg/m³, above the limitAugAug 1: 136 µg/m³, above the limitAug 2: 136 µg/m³, above the limitAug 3: 125 µg/m³, above the limitAug 4: 127 µg/m³, above the limitAug 5: 128 µg/m³, above the limitAug 6: 144 µg/m³, above the limitAug 8: 127 µg/m³, above the limitAug 9: 131 µg/m³, above the limitAug 10: 125 µg/m³, above the limitAug 11: 124 µg/m³, above the limitAug 13: 123 µg/m³, above the limitAug 15: 127 µg/m³, above the limitAug 16: 144 µg/m³, above the limitAug 19: 138 µg/m³, above the limitAug 20: 127 µg/m³, above the limitSepSep 4: 155 µg/m³, above the limitSep 5: 154 µg/m³, above the limitOctNovDec
  • above the limit
  • below the limit
  • too few readings for the day
  • no O₃ data in the EEA database
Days above the limit with values (29)
  1. Apr 25 132
  2. Apr 26 129
  3. May 4 121
  4. Jun 14 132
  5. Jun 26 125
  6. Jun 27 130
  7. Jun 29 120
  8. Jun 30 128
  9. Jul 26 127
  10. Jul 27 122
  11. Jul 30 130
  12. Jul 31 137
  13. Aug 1 136
  14. Aug 2 136
  15. Aug 3 125
  16. Aug 4 127
  17. Aug 5 128
  18. Aug 6 144
  19. Aug 8 127
  20. Aug 9 131
  21. Aug 10 125
  22. Aug 11 124
  23. Aug 13 123
  24. Aug 15 127
  25. Aug 16 144
  26. Aug 19 138
  27. Aug 20 127
  28. Sep 4 155
  29. Sep 5 154

Values in µg/m³, limit 120 µg/m³.

Months of 2026

MonthDays above 120Highest 8 hNo readings
January0730
February0680
March01030
April2 above the number allowed1320
May1 above the number allowed1210
June5 above the number allowed1320
July4 above the number allowed1370
August15 above the number allowed1440
September2 above the number allowed1550
October up to yesterday0910

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: O₃ in µg/m³highest 123 µg/m³, latest 32 µg/m³ (21:00)050100150ThuFriSatSunMonTueWedhighest 123latest 32 (21:00)
measuredmodel estimate, not counted
Last 7 days, every hour: O₃ in µg/m³
Values as a table
Hour toµg/m³Note
Wednesday, 10/7
22:0063model estimate, not counted
21:0031.7
20:0052.9
19:0064.4
18:0077.1
17:0086.3
16:0088.5
15:0091.1
14:0089
13:0092.4
12:0082.1
11:0056.4
10:0013.5
09:001.8
08:000.7
07:000.4
06:000.9
05:002.2
04:007.8
03:0010.1
02:009.9
01:0011.6
Tuesday, 10/6
00:006.4
23:003.2
22:005.4
21:006.7
20:0021
19:0035.6
18:0069.6
17:0078
16:0091.1
15:0099.9
14:0091.4
13:0049.4
12:0047
11:0024.9
10:006.1
09:003.7
08:001.8
07:003.1
06:005.9
05:006.2
04:001.5
03:001.6
02:002.6
01:002.8
Monday, 10/5
00:001.4
23:004.3
22:003.8
21:006.8
20:0019.8
19:0028.5
18:0048.1
17:0072.5
16:0085.7
15:0073.3
14:0062.5
13:0054.9
12:0040.7
11:0028.8
10:0012.4
09:002.6
08:000.5
07:000
06:001.1
05:004.1
04:006.7
03:007.7
02:0010.4
01:0010.1
Sunday, 10/4
00:008.7
23:0012.6
22:0011.9
21:0021.2
20:0023.6
19:0033.2
18:0044.7
17:0076.3
16:00103.2
15:00105.6
14:00107.6
13:0085.9
12:0064.4
11:0050.2
10:0023
09:0013.8
08:008.1
07:0012.2
06:0015
05:0015.3
04:0018.4
03:0019.4
02:0021.4
01:0022.9
Saturday, 10/3
00:0022.7
23:0020.1
22:0023.1
21:0024.4
20:0030.3
19:0048
18:0062.2
17:00101.1
16:00117.5
15:00122.2
14:00123.4
13:0088.1
12:0064.7
11:0037.5
10:0020.3
09:007
08:003.2
07:004.9
06:009.9
05:0012.4
04:0014.5
03:0016.6
02:0020.6
01:0020.7
Friday, 10/2
00:0020.2
23:0020.8
22:0021.4
21:0022.7
20:0034
19:0031.5
18:0063.3
17:0095.3
16:0094.6
15:0096
14:00101.3
13:0083.9
12:0052.7
11:0027.8
10:0017.7
09:003.4
08:001
07:001.3
06:003.4
05:0010.1
04:0011
03:0012.7
02:0010.3
01:0015.2
Thursday, 10/1
00:0016.4
23:0020
22:0019.3
21:0022.9
20:0024.6
19:0036.1
18:0083
17:0096.9
16:0099.3
15:0098.2
14:0094
13:0089
12:0048
11:0033.7
10:0015.6
09:001.9
08:000.9
07:000.7
06:002.8
05:0010.4
04:0012.5
03:0015
02:0017.5
01:0019
Wednesday, 9/30
00:0018.9
Last 30 days, highest 8-hour average of the day: O₃ in µg/m³highest 102 µg/m³, latest 70 µg/m³0501001509/99/169/239/30highest 102latest 70
target value, 120 µg/m³
Last 30 days, highest 8-hour average of the day: O₃ in µg/m³
Values as a table
Dayµg/m³Note
Tue, 10/670.3provisional
Mon, 10/558.3provisional
Sun, 10/479.7provisional
Sat, 10/390.9provisional
Fri, 10/277.3provisional
Thu, 10/180.5provisional
Wed, 9/3082.1provisional
Tue, 9/2982.3provisional
Mon, 9/2882provisional
Sun, 9/2779.3provisional
Sat, 9/2670.1provisional
Fri, 9/2568.9provisional
Thu, 9/2444.2provisional
Wed, 9/2365.7provisional
Tue, 9/2267provisional
Mon, 9/2159.3provisional
Sun, 9/2062.6provisional
Sat, 9/1974.8provisional
Fri, 9/1844.4provisional
Thu, 9/1739provisional
Wed, 9/1671.5provisional
Tue, 9/1560.4provisional
Mon, 9/1456.9provisional
Sun, 9/1377.3provisional
Sat, 9/1276.8provisional
Fri, 9/1151.6provisional
Thu, 9/1051.2provisional
Wed, 9/982.7provisional
Tue, 9/8101.9provisional
Mon, 9/798.3provisional
Last 12 months, monthly average: O₃ in µg/m³highest 77 µg/m³, latest 34 µg/m³050100DecFebAprJunAugOcthighest 77latest 34
Last 12 monthsthis month so fara year earlier
Last 12 months, monthly average: O₃ in µg/m³
Values as a table
Monthµg/m³a year earlierNote
October 2026 so far34.133.6measured in 100 % of hours · provisional · year before: same days
September 202643.328.7measured in 100 % of hours · provisional
August 202676.553measured in 100 % of hours · provisional
July 202669.459.3measured in 97 % of hours · provisional
June 202655.474.8measured in 97 % of hours · provisional
May 202661.958.4measured in 97 % of hours · provisional
April 202660.153.1measured in 99 % of hours · provisional
March 20264642.7measured in 85 % of hours · provisional
February 202623.732.5measured in 85 % of hours · provisional
January 202629.532.5measured in 92 % of hours · provisional
December 202510.619.2measured in 78 % of hours · verified
November 202528.823.8measured in 81 % of hours · verified

O₃ by year

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

Measure2026*20252024
Days with 8-hour average above 120 µg/m³ (target value 25)29≥ 18²5
Annual average, µg/m³52.3*42.541.7
Highest 8-hour average, µg/m³155September 4160June 23129July 16
Hours measured95 %91 %92 %
Days without any reading from the station000

* 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.

■ and a figure in red: more than is allowed for the whole year.

The column for 2023 is shown on wider screens.

The worst days of 2026

DayHighest 8 hTimes the limit
Sep 4, 2026provisional1551.3 ×
Sep 5, 2026provisional1541.3 ×
Aug 16, 2026provisional1441.2 ×
Aug 6, 2026provisional1441.2 ×
Aug 19, 2026provisional1381.1 ×

Daily average in µg/m³, daily limit 120 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 7, 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.