Air at the Zagorje station

Zagorje ob Savi, Slovenia

Network: Slovenian Environment Agency · Station code: SI0036A

This year, up to yesterday (October 7)

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 260 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 23:00

Latest values

Latest value: Wed 23:00

Readings
Pollutant	Value	Level
PM10	22.5 µg/m³	Fair
NO₂	22.8 µg/m³	Fair
O₃	15.3 µg/m³	Good
SO₂	2.1 µg/m³	Good

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 19.8 µg/m³, week before 12.9 µg/m³
PM2.5: average 11.6 µg/m³, week before 8 µg/m³
NO₂: average 16.8 µg/m³, week before 11.3 µg/m³
O₃: average 35 µg/m³, week before 33.8 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

Particulate matter PM10

22.5

Nowµg/m³

Measured at 23:00

Last 24 hoursµg/m³

measured in 92 % of hours · provisional

19.8

Last 7 daysµg/m³

measured in 99 % of hours · provisional

13.1

Last 30 daysµg/m³

measured in 100 % of hours · provisional

too few readings

Last 12 months

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

measuredmodel estimate, not counted

Last 7 days, every hour: PM10 in µg/m³

Values as a table

Hour to	µg/m³	Note
Wednesday, 10/7
23:00	25	model estimate, not counted
22:00	27.1
21:00	28.3
20:00	22.4
19:00	22.5
18:00	20.4
17:00	21.5
16:00	20.7
15:00	19.3
14:00	25.6
13:00	21.8
12:00	22
11:00	25.5
10:00	29.7
09:00	29.5
08:00	24.4
07:00	22.9
06:00	19.9
05:00	19.6
04:00	20
03:00	20.5
02:00	20.8
01:00	21.7
Tuesday, 10/6
00:00	23
23:00	27.3
22:00	29.7
21:00	31.8
20:00	32.6
19:00	34.5
18:00	25.7
17:00	23.7
16:00	23.1
15:00	17.5
14:00	17.9
13:00	23.1
12:00	17.2
11:00	22.8
10:00	33.4
09:00	24.2
08:00	16.2
07:00	16
06:00	15.6
05:00	16.7
04:00	14.7
03:00	14
02:00	15.7
01:00	16.6
Monday, 10/5
00:00	17.9
23:00	19.7
22:00	23.7
21:00	29.7
20:00	33.5
19:00	30.3
18:00	29.2
17:00	22
16:00	19.9
15:00	21.6
14:00	24.3
13:00	30.2
12:00	40.7
11:00	24.7
10:00	22.3
09:00	19.7
08:00	15.6
07:00	16.1
06:00	13
05:00	11.1
04:00	12.1
03:00	11.7
02:00	12.4
01:00	14.1
Sunday, 10/4
00:00	17.4
23:00	18.6
22:00	25.3
21:00	30.8
20:00	28.1
19:00	28.3
18:00	21.3
17:00	17.6
16:00	14.8
15:00	17
14:00	19.4
13:00	16.2
12:00	17.4
11:00	16
10:00	21.9
09:00	12.7
08:00	11.9
07:00	10.6
06:00	9.7
05:00	10.6
04:00	11.9
03:00	11.3
02:00	12.2
01:00	14.8
Saturday, 10/3
00:00	18
23:00	21.5
22:00	22.3
21:00	28.4
20:00	32
19:00	28.4
18:00	19.1
17:00	15.3
16:00	12.8
15:00	13.6
14:00	15
13:00	23.7
12:00	21.7
11:00	19.7
10:00	17
09:00	13.2
08:00	10.8
07:00	10.5
06:00	10.7
05:00	10.7
04:00	11.6
03:00	11.8
02:00	11.6
01:00	13.8
Friday, 10/2
00:00	17.5
23:00	20.7
22:00	27.9
21:00	26.5
20:00	24.3
19:00	37.3
18:00	33
17:00	15.9
16:00	13.8
15:00	14.5
14:00	16.8
13:00	23.7
12:00	20.3
11:00	22.7
10:00	17.3
09:00	32.6
08:00	24.3
07:00	14.1
06:00	12.8
05:00	10.4
04:00	10.7
03:00	11.3
02:00	12.2
01:00	13.4
Thursday, 10/1
00:00	14
23:00	16
22:00	19.4
21:00	20.5
20:00	23.6
19:00	22.6
18:00	14.8
17:00	9.8
16:00	12.9
15:00	13.7
14:00	15
13:00	24.1
12:00	26
11:00	27.9
10:00	32.2
09:00	20.1
08:00	19.2
07:00	14.6
06:00	14.1
05:00	11.7
04:00	13.1
03:00	12.2
02:00	12.1

EU daily limit, 50 µg/m³

Last 30 days, daily average: PM10 in µg/m³

Values as a table

Day	µg/m³	Note
Wed, 10/7	23	provisional
Tue, 10/6	22.2	provisional
Mon, 10/5	21.5	provisional
Sun, 10/4	17.3	provisional
Sat, 10/3	17.2	provisional
Fri, 10/2	19.8	provisional
Thu, 10/1	17.6	provisional
Wed, 9/30	14.8	provisional
Tue, 9/29	17	provisional
Mon, 9/28	18.1	provisional
Sun, 9/27	11.1	provisional
Sat, 9/26	7.5	provisional
Fri, 9/25	9.2	provisional
Thu, 9/24	12.5	provisional
Wed, 9/23	10.5	provisional
Tue, 9/22	7.8	provisional
Mon, 9/21	11.9	provisional
Sun, 9/20	9.9	provisional
Sat, 9/19	13.7	provisional
Fri, 9/18	11.7	provisional
Thu, 9/17	12.6	provisional
Wed, 9/16	11.3	provisional
Tue, 9/15	9	provisional
Mon, 9/14	8.6	provisional
Sun, 9/13	7.6	provisional
Sat, 9/12	13.7	provisional
Fri, 9/11	4.2	provisional
Thu, 9/10	5.9	provisional
Wed, 9/9	14.1	provisional
Tue, 9/8	12.9	provisional

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

Month	µg/m³	Note
October 2026 so far	19.8	measured in 99 % of hours · provisional
September 2026	10.9	measured in 100 % of hours · provisional
August 2026	14.1	measured in 100 % of hours · provisional
July 2026	12	measured in 100 % of hours · provisional
June 2026	14.2	measured in 100 % of hours · provisional
May 2026	11.7	measured in 100 % of hours · provisional
April 2026	15.3	measured in 100 % of hours · provisional
March 2026	22.9	measured in 99 % of hours · provisional
February 2026	24.3	measured in 100 % of hours · provisional
January 2026	28.7	measured in 100 % of hours · provisional
December 2025	too few readings
November 2025	too few readings

PM10 by year

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

Measure	2026*
Days above 50 µg/m³ (allowed 35)	4
Annual average, µg/m³ (EU limit 40)	17.1*
Highest daily average, µg/m³	75January 23
Highest hourly value, µg/m³	131January 1
Hours measured	100 %
Days without any reading from the station	0

* 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.

Particulate matter PM2.5

no measurement

Now

too few readings

Last 24 hours

measured in 0 % of hours

11.6

Last 7 daysµg/m³

measured in 86 % of hours · provisional

6.8

Last 30 daysµg/m³

measured in 97 % of hours · provisional

Last 12 monthsµg/m³

measured in 100 % of hours · provisional

Months of 2025

Month	Average	Highest day
January	20	54
February	31	61
March	14	31
April	9	14
May	6	16
June	9	25
July	5	11
August	7	12
September	5	11
October	9	16
November	17	36
December	20	36

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.

measured

Last 7 days, every hour: PM2.5 in µg/m³

Values as a table

Hour to	µg/m³	Note
Tuesday, 10/6
00:00	19.3
23:00	22.6
22:00	22.7
21:00	24
20:00	22.9
19:00	19.1
18:00	14.9
17:00	14.3
16:00	13.1
15:00	10.8
14:00	10.1
13:00	10.5
12:00	11
11:00	13.1
10:00	14.6
09:00	14
08:00	11.4
07:00	11.8
06:00	12.2
05:00	12.9
04:00	11.8
03:00	11.7
02:00	12.2
01:00	13.3
Monday, 10/5
00:00	14.7
23:00	15.8
22:00	18.3
21:00	18.9
20:00	20.8
19:00	13.4
18:00	12.2
17:00	8.5
16:00	9.1
15:00	10.3
14:00	11.1
13:00	11.9
12:00	13.4
11:00	11.2
10:00	12.3
09:00	11.5
08:00	10.9
07:00	11.1
06:00	9.3
05:00	8.8
04:00	9.1
03:00	9.2
02:00	9.8
01:00	11
Sunday, 10/4
00:00	14.2
23:00	14.7
22:00	20.1
21:00	24.6
20:00	19.3
19:00	13.2
18:00	10.6
17:00	8.5
16:00	7.7
15:00	8.2
14:00	8.6
13:00	9
12:00	10.5
11:00	10.1
10:00	12.9
09:00	9.1
08:00	9.4
07:00	8
06:00	7.7
05:00	8.4
04:00	9.1
03:00	8.9
02:00	9.8
01:00	11.4
Saturday, 10/3
00:00	14.2
23:00	17.1
22:00	17
21:00	19.5
20:00	16.4
19:00	11.6
18:00	9.6
17:00	7.2
16:00	6.7
15:00	7.2
14:00	8
13:00	9.4
12:00	10.8
11:00	10.6
10:00	9.9
09:00	9.1
08:00	7.6
07:00	7.6
06:00	7.6
05:00	8
04:00	8.3
03:00	8.7
02:00	8.6
01:00	10
Friday, 10/2
00:00	12.6
23:00	14.9
22:00	21.6
21:00	18.3
20:00	12.7
19:00	12.6
18:00	10.9
17:00	7.3
16:00	6.6
15:00	7
14:00	7.9
13:00	10.3
12:00	10
11:00	12
10:00	9.5
09:00	11.6
08:00	10.5
07:00	9
06:00	8.4
05:00	7.6
04:00	7.8
03:00	8
02:00	8.4
01:00	8.9
Thursday, 10/1
00:00	9.9
23:00	11.2
22:00	13.3
21:00	12.9
20:00	13.2
19:00	11.1
18:00	7
17:00	5.4
16:00	6.3
15:00	7.1
14:00	7.6
13:00	10.3
12:00	11.9
11:00	15.6
10:00	19.4
09:00	11
08:00	10.6
07:00	9.2
06:00	9.3
05:00	8.7
04:00	9.5
03:00	9.2
02:00	9.2

Last 30 days, daily average: PM2.5 in µg/m³

Values as a table

Day	µg/m³	Note
Wed, 10/7		no measurement
Tue, 10/6	14.8	provisional
Mon, 10/5	12.2	provisional
Sun, 10/4	11.4	provisional
Sat, 10/3	10.4	provisional
Fri, 10/2	10.6	provisional
Thu, 10/1	10.4	provisional
Wed, 9/30	8.6	provisional
Tue, 9/29	11.2	provisional
Mon, 9/28	12.8	provisional
Sun, 9/27	8	provisional
Sat, 9/26	4.1	provisional
Fri, 9/25	4.6	provisional
Thu, 9/24	6.5	provisional
Wed, 9/23	4.5	provisional
Tue, 9/22	3.8	provisional
Mon, 9/21	4.9	provisional
Sun, 9/20	5.3	provisional
Sat, 9/19	5.5	provisional
Fri, 9/18	4.7	provisional
Thu, 9/17	5.5	provisional
Wed, 9/16	4.9	provisional
Tue, 9/15	3.4	provisional
Mon, 9/14	4.1	provisional
Sun, 9/13	3.9	provisional
Sat, 9/12	4	provisional
Fri, 9/11	2	provisional
Thu, 9/10	3.1	provisional
Wed, 9/9	6.1	provisional
Tue, 9/8	5.7	provisional

Last 12 monthsthis month so fara year earlierEU annual limit, 25 µg/m³

Last 12 months, monthly average: PM2.5 in µg/m³

Values as a table

Month	µg/m³	a year earlier	Note
October 2026 so far	11.6	7	measured in 86 % of hours · provisional · year before: same days
September 2026	5.3	4.9	measured in 100 % of hours · provisional
August 2026	7.2	6.7	measured in 100 % of hours · provisional
July 2026	6.4	5	measured in 100 % of hours · provisional
June 2026	7.2	9.5	measured in 100 % of hours · provisional
May 2026	5.7	6	measured in 100 % of hours · provisional
April 2026	8.9	8.5	measured in 100 % of hours · provisional
March 2026	15.2	14.4	measured in 99 % of hours · provisional
February 2026	16.8	31	measured in 100 % of hours · provisional
January 2026	24.7	19.5	measured in 100 % of hours · provisional
December 2025	20.3	28.7	measured in 100 % of hours · verified
November 2025	16.6	24.3	measured in 100 % of hours · verified

PM2.5 by year

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

Measure	2026*	2025	2024	2023
Annual average, µg/m³ (EU limit 25)	10.8*	12.5	15.3	15.9
Highest daily average, µg/m³	62January 23	61February 9	65December 31	60February 11
Highest hourly value, µg/m³	124January 1	155January 1	108December 16	102February 7
Hours measured	99 %	100 %	100 %	100 %
Days without any reading from the station	0	0	0	0

* 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.

■ 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 25 µg/m³, 18 days allowed. In 2025 there were 46 such days.
WHO 2021: daily 15 µg/m³, at most three to four days a year. In 2025 there were 92 such days.
EU from 2030: annual average 10 µg/m³. Average in 2025: 12 µg/m³.
WHO 2021: annual average 5 µg/m³. Average in 2025: 12 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.

Nitrogen dioxide NO₂

22.8

Nowµg/m³

Measured at 23:00

16.1

Last 24 hoursµg/m³

measured in 88 % of hours · provisional

16.8

Last 7 daysµg/m³

measured in 95 % of hours · provisional

11.1

Last 30 daysµg/m³

measured in 92 % of hours · provisional

15.3

Last 12 monthsµg/m³

measured in 90 % of hours · provisional

Days in 2025: NO₂, at least one hour above 200 µg/m³

No measured day above the limit.

above the limit
below the limit

Months of 2025

Month	Average	Highest day
January	20	30
February	23	33
March	21	33
April	15	21
May	11	15
June	11	16
July	9	14
August	9	14
September	10	15
October	14	21
November	19	30
December	19	28

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.

measuredmodel estimate, not counted

Last 7 days, every hour: NO₂ in µg/m³

Values as a table

Hour to	µg/m³	Note
Wednesday, 10/7
23:00	8	model estimate, not counted
22:00	25.1
21:00	32.6
20:00	25.4
19:00	7	model estimate, not counted
18:00	21.8
17:00	20.7
16:00	18.4
15:00	17
14:00	14.7
13:00	10.5
12:00	11.9
11:00	16.2
10:00	24.1
09:00	18.9
08:00	15.1
07:00	14.1
06:00	14.2
05:00	10.8
04:00	5.5
03:00	5.3
02:00	6.6
01:00	10.2
Tuesday, 10/6
00:00	18.7
23:00	26.1
22:00	29.9
21:00	33.7
20:00	33.5
18:00	18.6
17:00	18.2
16:00	20.5
15:00	13.5
14:00	14.2
13:00	18.9
12:00	16.4
11:00	17.4
10:00	19.5
09:00	18.8
08:00	18.3
07:00	15
06:00	10.3
05:00	7.8
04:00	12.5
03:00	12
02:00	13.3
01:00	17
Monday, 10/5
00:00	21.7
23:00	23.2
22:00	29.2
21:00	34.1
20:00	35.7
19:00	33
17:00	19.6
16:00	15.4
15:00	18.1
14:00	17.1
13:00	18
12:00	16.8
11:00	17.4
10:00	19
09:00	18.8
08:00	17.7
07:00	17.6
06:00	15.9
05:00	10.3
04:00	9.6
03:00	11.1
02:00	11.4
01:00	13.1
Sunday, 10/4
00:00	17.5
23:00	19.1
22:00	25.3
21:00	25.5
20:00	33.7
19:00	31.7
17:00	17.5
16:00	6.1
15:00	6.8
14:00	7.8
13:00	11.3
12:00	10.4
11:00	11.8
10:00	13.6
09:00	6.7
08:00	7.7
07:00	4.1
06:00	3
05:00	2.9
04:00	3.6
03:00	4.8
02:00	5.4
01:00	7.9
Saturday, 10/3
00:00	11.8
23:00	19.4
22:00	22.4
21:00	30.4
20:00	35.7
19:00	34.7
18:00	25.5
16:00	6.5
15:00	7.9
14:00	7.6
13:00	14.5
12:00	18.7
11:00	20.8
10:00	17.7
09:00	12.9
08:00	12.8
07:00	11
06:00	8.3
05:00	5.2
04:00	5
03:00	5.2
02:00	5.6
01:00	8.2
Friday, 10/2
00:00	11.9
23:00	16
22:00	22.1
21:00	27.6
20:00	25.1
19:00	32.3
18:00	27.1
16:00	18.8
15:00	16
14:00	10.5
13:00	16.3
12:00	19.5
11:00	24.8
10:00	21.4
09:00	23.1
08:00	21.5
07:00	18.2
06:00	14.3
05:00	9.5
04:00	9.5
03:00	10.5
02:00	16.4
01:00	15.5
Thursday, 10/1
00:00	19.1
23:00	20.3
22:00	25.5
21:00	28.9
20:00	40.7
19:00	40.7
18:00	27.8
17:00	10.4
15:00	13.5
14:00	11.6
13:00	12.1
12:00	23.2
11:00	23
10:00	20.8
09:00	18.7
08:00	16.1
07:00	15.4
06:00	12.8
05:00	6
04:00	4.3
03:00	4.4
02:00	4.6

too few readings

Last 30 days, daily average: NO₂ in µg/m³

Values as a table

Day	µg/m³	Note
Wed, 10/7	16.1	provisional
Tue, 10/6	18.4	provisional
Mon, 10/5	19.3	provisional
Sun, 10/4	12.4	provisional
Sat, 10/3	15.1	provisional
Fri, 10/2	18.6	provisional
Thu, 10/1	17.7	provisional
Wed, 9/30	15.2	provisional
Tue, 9/29	14.4	provisional
Mon, 9/28	13	provisional
Sun, 9/27	6.5	provisional
Sat, 9/26	7.1	provisional
Fri, 9/25	9.8	provisional
Thu, 9/24	13	provisional
Wed, 9/23	8.9	provisional
Tue, 9/22	8.1	provisional
Mon, 9/21	8.8	provisional
Sun, 9/20	5	provisional
Sat, 9/19	6.2	provisional
Fri, 9/18	7.7	provisional
Thu, 9/17		too few readings
Wed, 9/16		too few readings
Tue, 9/15	7.7	provisional
Mon, 9/14	8.2	provisional
Sun, 9/13	4.7	provisional
Sat, 9/12	5	provisional
Fri, 9/11	10.3	provisional
Thu, 9/10	8.8	provisional
Wed, 9/9	11.7	provisional
Tue, 9/8	14.7	provisional

Last 12 monthsthis month so fara year earlierEU annual limit, 40 µg/m³

Last 12 months, monthly average: NO₂ in µg/m³

Values as a table

Month	µg/m³	a year earlier	Note
October 2026 so far	16.8	12.4	measured in 95 % of hours · provisional · year before: same days
September 2026	9.8	9.8	measured in 93 % of hours · provisional
August 2026	10.1	9	measured in 96 % of hours · provisional
July 2026	9.1	9.5	measured in 92 % of hours · provisional
June 2026	8.4	10.8	measured in 79 % of hours · provisional
May 2026	too few readings	10.8	measured in 60 % of hours · provisional
April 2026	15	14.7	measured in 96 % of hours · provisional
March 2026	19.5	21	measured in 95 % of hours · provisional
February 2026	21.7	22.8	measured in 93 % of hours · provisional
January 2026	23.9	20.4	measured in 96 % of hours · provisional
December 2025	19.3	21.5	measured in 96 % of hours · verified
November 2025	18.9	19	measured in 96 % of hours · verified

NO₂ by year

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

Measure	2026*	2025	2024	2023
Hours above 200 µg/m³ (allowed 18)	0²	0	0	0
Hours above 400 µg/m³, three hours in a row (alert threshold)	0	0	0	0
Annual average, µg/m³ (EU limit 40)	14.6*	15	16.4	17
Highest daily average, µg/m³	48January 9	33February 20	44January 23	46January 17
Highest hourly value, µg/m³	69January 8	69March 7	72April 15	74February 16
Hours measured	89 %	96 %	96 %	96 %
Days without any reading from the station	0	0	0	0

* 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.

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.

There is no allowed number for the warning and alert thresholds: every such hour or day is in red.

The column for 2023 is shown on wider screens.

Compared with the new EU rules and the WHO recommendation

EU from 2030: daily 50 µg/m³, 18 days allowed. In 2025 there were 0 such days.
WHO 2021: daily 25 µg/m³, at most three to four days a year. In 2025 there were 32 such days.
EU from 2030: annual average 20 µg/m³. Average in 2025: 15 µg/m³.
WHO 2021: annual average 10 µg/m³. Average in 2025: 15 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.

Ozone O₃

15.3

Nowµg/m³

Measured at 23:00

40.8

Last 24 hoursµg/m³

measured in 92 % of hours · provisional

Last 7 daysµg/m³

measured in 99 % of hours · provisional

34.9

Last 30 daysµg/m³

measured in 100 % of hours · provisional

45.8

Last 12 monthsµg/m³

measured in 91 % of hours · provisional

Days in 2025: O₃, 8-hour average above 120 µg/m³

18 days above the limit.

above the limit
below the limit
too few readings for the day

Days above the limit with values (18)

May 1 123
May 2 132
May 3 133
May 4 130
Jun 11 132
Jun 14 121
Jun 15 120
Jun 23 160
Jun 24 157
Jun 25 152
Jun 26 154
Jun 27 135
Jul 2 121
Jul 4 129
Jul 19 133
Jul 20 126
Aug 14 122
Aug 15 132

Values in µg/m³, limit 120 µg/m³.

Months of 2025

Month	Days above 120	Average	Highest 8 h
January	0	32	68
February	0	33	79
March	0	43	99
April	0	53	112
May	4 above the number allowed	58	133
June	8 above the number allowed	75	160
July	4 above the number allowed	59	133
August	2 above the number allowed	53	132
September	0	29	90
October	0	25	80
November	0	29	79
December	0	11	49

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.

measuredmodel estimate, not counted

Last 7 days, every hour: O₃ in µg/m³

Values as a table

Hour to	µg/m³	Note
Wednesday, 10/7
23:00	60	model estimate, not counted
22:00	26.3
21:00	31.7
20:00	52.9
19:00	64.4
18:00	77.1
17:00	86.3
16:00	88.5
15:00	91.1
14:00	89
13:00	92.4
12:00	82.1
11:00	56.4
10:00	13.5
09:00	1.8
08:00	0.7
07:00	0.4
06:00	0.9
05:00	2.2
04:00	7.8
03:00	10.1
02:00	9.9
01:00	11.6
Tuesday, 10/6
00:00	6.4
23:00	3.2
22:00	5.4
21:00	6.7
20:00	21
19:00	35.6
18:00	69.6
17:00	78
16:00	91.1
15:00	99.9
14:00	91.4
13:00	49.4
12:00	47
11:00	24.9
10:00	6.1
09:00	3.7
08:00	1.8
07:00	3.1
06:00	5.9
05:00	6.2
04:00	1.5
03:00	1.6
02:00	2.6
01:00	2.8
Monday, 10/5
00:00	1.4
23:00	4.3
22:00	3.8
21:00	6.8
20:00	19.8
19:00	28.5
18:00	48.1
17:00	72.5
16:00	85.7
15:00	73.3
14:00	62.5
13:00	54.9
12:00	40.7
11:00	28.8
10:00	12.4
09:00	2.6
08:00	0.5
07:00	0
06:00	1.1
05:00	4.1
04:00	6.7
03:00	7.7
02:00	10.4
01:00	10.1
Sunday, 10/4
00:00	8.7
23:00	12.6
22:00	11.9
21:00	21.2
20:00	23.6
19:00	33.2
18:00	44.7
17:00	76.3
16:00	103.2
15:00	105.6
14:00	107.6
13:00	85.9
12:00	64.4
11:00	50.2
10:00	23
09:00	13.8
08:00	8.1
07:00	12.2
06:00	15
05:00	15.3
04:00	18.4
03:00	19.4
02:00	21.4
01:00	22.9
Saturday, 10/3
00:00	22.7
23:00	20.1
22:00	23.1
21:00	24.4
20:00	30.3
19:00	48
18:00	62.2
17:00	101.1
16:00	117.5
15:00	122.2
14:00	123.4
13:00	88.1
12:00	64.7
11:00	37.5
10:00	20.3
09:00	7
08:00	3.2
07:00	4.9
06:00	9.9
05:00	12.4
04:00	14.5
03:00	16.6
02:00	20.6
01:00	20.7
Friday, 10/2
00:00	20.2
23:00	20.8
22:00	21.4
21:00	22.7
20:00	34
19:00	31.5
18:00	63.3
17:00	95.3
16:00	94.6
15:00	96
14:00	101.3
13:00	83.9
12:00	52.7
11:00	27.8
10:00	17.7
09:00	3.4
08:00	1
07:00	1.3
06:00	3.4
05:00	10.1
04:00	11
03:00	12.7
02:00	10.3
01:00	15.2
Thursday, 10/1
00:00	16.4
23:00	20
22:00	19.3
21:00	22.9
20:00	24.6
19:00	36.1
18:00	83
17:00	96.9
16:00	99.3
15:00	98.2
14:00	94
13:00	89
12:00	48
11:00	33.7
10:00	15.6
09:00	1.9
08:00	0.9
07:00	0.7
06:00	2.8
05:00	10.4
04:00	12.5
03:00	15
02:00	17.5

target value, 120 µg/m³

Last 30 days, highest 8-hour average of the day: O₃ in µg/m³

Values as a table

Day	µg/m³	Note
Wed, 10/7	83.8	provisional
Tue, 10/6	70.3	provisional
Mon, 10/5	58.3	provisional
Sun, 10/4	79.7	provisional
Sat, 10/3	90.9	provisional
Fri, 10/2	77.3	provisional
Thu, 10/1	80.5	provisional
Wed, 9/30	82.1	provisional
Tue, 9/29	82.3	provisional
Mon, 9/28	82	provisional
Sun, 9/27	79.3	provisional
Sat, 9/26	70.1	provisional
Fri, 9/25	68.9	provisional
Thu, 9/24	44.2	provisional
Wed, 9/23	65.7	provisional
Tue, 9/22	67	provisional
Mon, 9/21	59.3	provisional
Sun, 9/20	62.6	provisional
Sat, 9/19	74.8	provisional
Fri, 9/18	44.4	provisional
Thu, 9/17	39	provisional
Wed, 9/16	71.5	provisional
Tue, 9/15	60.4	provisional
Mon, 9/14	56.9	provisional
Sun, 9/13	77.3	provisional
Sat, 9/12	76.8	provisional
Fri, 9/11	51.6	provisional
Thu, 9/10	51.2	provisional
Wed, 9/9	82.7	provisional
Tue, 9/8	101.9	provisional

Last 12 monthsthis month so fara year earlier

Last 12 months, monthly average: O₃ in µg/m³

Values as a table

Month	µg/m³	a year earlier	Note
October 2026 so far	35	30.7	measured in 99 % of hours · provisional · year before: same days
September 2026	43.3	28.7	measured in 100 % of hours · provisional
August 2026	76.5	53	measured in 100 % of hours · provisional
July 2026	69.4	59.3	measured in 97 % of hours · provisional
June 2026	55.4	74.8	measured in 97 % of hours · provisional
May 2026	61.9	58.4	measured in 97 % of hours · provisional
April 2026	60.1	53.1	measured in 99 % of hours · provisional
March 2026	46	42.7	measured in 85 % of hours · provisional
February 2026	23.7	32.5	measured in 85 % of hours · provisional
January 2026	29.5	32.5	measured in 92 % of hours · provisional
December 2025	10.6	19.2	measured in 78 % of hours · verified
November 2025	28.8	23.8	measured in 81 % of hours · verified

O₃ by year

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

Measure	2026*	2025	2024	2023
Days with 8-hour average above 120 µg/m³ (target value 25)	29	≥ 18²	5	7
Annual average, µg/m³	52.3*	42.5	41.7	42.1
Highest 8-hour average, µg/m³	155September 4	160June 23	129July 16	142June 18
Hours measured	95 %	91 %	92 %	93 %
Days without any reading from the station	0	0	0	0

* 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.

≥ 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 2025

Day	Highest 8 h	Times the limit
Jun 23, 2025	160	1.3 ×
Jun 24, 2025	157	1.3 ×
Jun 26, 2025	154	1.3 ×
Jun 25, 2025	152	1.3 ×
Jun 27, 2025	135	1.1 ×

Daily average in µg/m³, daily limit 120 µg/m³. Days with the same unverified value over many hours are not on this list.

Sulphur dioxide SO₂

2.1

Nowµg/m³

Measured at 23:00

2.2

Last 24 hoursµg/m³

measured in 88 % of hours · provisional

too few readings

Last 7 days

measured in 69 % of hours · provisional

too few readings

Last 30 days

measured in 68 % of hours · provisional

too few readings

Last 12 months

measured in 45 % of hours · provisional

Days in 2025: SO₂, daily average above 125 µg/m³

No measured day above the limit.

above the limit
below the limit
too few readings for the day
no SO₂ data in the EEA database

Months of 2025

Month	Average	Highest day
January	5	6
February	6	11
March	6	7
April	7	8
May	7	7
June	4	9
July	3	4
August	5	6
September	8	10
October	too few	11
November	too few
December	too few

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.

measured

Last 7 days, every hour: SO₂ in µg/m³

Values as a table

Hour to	µg/m³	Note
Wednesday, 10/7
22:00	2.1
21:00	2.2
20:00	2.2
19:00	2.2
18:00	2.4
17:00	2.6
16:00	2.8
15:00	2.6
14:00	2.7
12:00	2.9
11:00	2.3
10:00	2.4
09:00	2.5
08:00	2.4
07:00	2.3
06:00	2.1
05:00	1.9
04:00	1.7
03:00	1.7
02:00	1.8
01:00	1.8
Tuesday, 10/6
00:00	1.9
23:00	1.9
22:00	2
21:00	2
20:00	1.9
19:00	2
18:00	2.6
17:00	3.6
16:00	5.1
15:00	6.3
14:00	5.8
Monday, 10/5
22:00	2.1
21:00	2
20:00	2
19:00	2.4
18:00	3.7
17:00	5.9
16:00	8.5
15:00	11.4
14:00	15.6
13:00	7.6
12:00	1.9
11:00	1.7
10:00	1.7
09:00	2
08:00	1.9
07:00	1.6
06:00	1.9
05:00	1.5
04:00	1.6
03:00	1.5
02:00	1.7
01:00	1.6
Sunday, 10/4
00:00	1.6
22:00	1.7
21:00	1.5
20:00	1.8
19:00	1.8
18:00	2.1
17:00	4.4
16:00	5.5
15:00	5.4
14:00	5.1
13:00	3.4
12:00	2
11:00	1.7
10:00	1.7
09:00	1.5
08:00	1.5
07:00	1.5
06:00	1.5
05:00	1.4
04:00	1.5
03:00	1.5
02:00	1.6
01:00	1.6
Saturday, 10/3
00:00	1.5
23:00	1.7
21:00	1.6
20:00	1.7
19:00	2
18:00	3.7
17:00	10
16:00	14.6
15:00	18.3
14:00	19
13:00	4.1
12:00	1.9
11:00	1.6
10:00	1.8
09:00	1.6
08:00	1.6
07:00	1.5
06:00	1.5
05:00	1.5
04:00	1.6
03:00	1.6
02:00	1.6
01:00	1.6
Friday, 10/2
00:00	1.5
23:00	1.6
Thursday, 10/1
14:00	3.7
13:00	3.4
12:00	2
11:00	1.5
10:00	1.6
09:00	1.8
08:00	1.7
07:00	1.6
06:00	1.6
05:00	1.4
04:00	1.3
03:00	1.4
02:00	1.4

too few readings

Last 30 days, daily average: SO₂ in µg/m³

Values as a table

Day	µg/m³	Note
Wed, 10/7	2.2	provisional
Tue, 10/6		too few readings
Mon, 10/5	3.7	provisional
Sun, 10/4	2.3	provisional
Sat, 10/3	4.2	provisional
Fri, 10/2		too few readings
Thu, 10/1		too few readings
Wed, 9/30		too few readings
Tue, 9/29		no measurement
Mon, 9/28		no measurement
Sun, 9/27		too few readings
Sat, 9/26	0.8	provisional
Fri, 9/25	0.7	provisional
Thu, 9/24		too few readings
Wed, 9/23		no measurement
Tue, 9/22		no measurement
Mon, 9/21	0.4	provisional
Sun, 9/20	0.3	provisional
Sat, 9/19	0.2	provisional
Fri, 9/18	0.2	provisional
Thu, 9/17		too few readings
Wed, 9/16		too few readings
Tue, 9/15		too few readings
Mon, 9/14	2.8	provisional
Sun, 9/13	2.8	provisional
Sat, 9/12	2.8	provisional
Fri, 9/11	2.6	provisional
Thu, 9/10	2.6	provisional
Wed, 9/9	2.6	provisional
Tue, 9/8	2.8	provisional

Last 12 monthsa year earlier

Last 12 months, monthly average: SO₂ in µg/m³

Values as a table

Month	µg/m³	a year earlier	Note
October 2026 so far	too few readings	10.4	measured in 69 % of hours · provisional · year before: same days
September 2026	too few readings	8.1	measured in 74 % of hours · provisional
August 2026	2.5	5.2	measured in 96 % of hours · provisional
July 2026	1.7	3	measured in 92 % of hours · provisional
June 2026	1.3	3.9	measured in 81 % of hours · provisional
May 2026	too few readings	7	measured in 56 % of hours · provisional
April 2026	0.5	6.8	measured in 78 % of hours · provisional
March 2026	too few readings	6.2	measured in 15 % of hours · provisional
February 2026	too few readings	6.1	measured in 13 % of hours · provisional
January 2026	too few readings	4.8	measured in 10 % of hours · provisional
December 2025	too few readings	4.2	measured in 0 % of hours · verified
November 2025	too few readings	3.7	measured in 0 % of hours · verified

SO₂ by year

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

Measure	2026*	2025	2024	2023
Days above 125 µg/m³ (allowed 3)	0²	0²	0	0²
Hours above 350 µg/m³ (allowed 24)	0²	0²	0	0²
Hours above 500 µg/m³, three hours in a row (alert threshold)	0	0	0	0
Annual average, µg/m³	too few	too few	2.2	1.7¹
Highest daily average, µg/m³	4October 3	11February 20	5October 20	4September 29
Highest hourly value, µg/m³	19October 3	33February 20	15September 22	20September 29
Hours measured	58 %	72 %	93 %	86 %
Days without any reading from the station	0	0	0	0

* 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.

¹ Fewer than 90 % of the hours were measured, so we do not compare this average with the limit.

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.

There is no allowed number for the warning and alert thresholds: every such hour or day is in red.

The column for 2023 is shown on wider screens.

Compared with the new EU rules and the WHO recommendation

EU from 2030: daily 50 µg/m³, 18 days allowed. In 2025 there were 0 such days.
WHO 2021: daily 40 µg/m³, at most three to four days a year. In 2025 there were 0 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.

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

All monitoring stations

How to cite this page

Name samoEKO as the source and link to this page. The readings come from official stations, so please credit them too.

Source: samoEKO, Air quality, Zagorje station, https://samoeko.com/en/luft/stanica/SI0036A, accessed 8 October 2026. Readings: official stations, via the European Environment Agency (EEA). The level is calculated by samoEKO.

Rules for reuse

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