Air at the Rijeka-2 station

Rijeka, Croatia

Network: Državna mreža za trajno praćenje kvalitete zraka · Station code: HR0005A

This year, up to yesterday (October 6)

47 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.

Worst day: August 15, 2026, O₃ 155 µg/m³ as a daily average, 1.3 times the limit.

Daily average for 267 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
Pollutant	Value	Level
PM10	20.8 µg/m³	Fair
NO₂	23.6 µg/m³	Fair
O₃	80.7 µg/m³	Fair
SO₂	3.7 µg/m³	Good

How the air is changing

Over the last seven days there was more PM10, NO₂, O₃, and SO₂ in the air than the week before.

PM10: average 19.4 µg/m³, week before 14.1 µg/m³
PM2.5: average 7.9 µg/m³, week before 7.5 µg/m³
NO₂: average 13 µg/m³, week before 11 µg/m³
O₃: average 101.3 µg/m³, week before 84.9 µg/m³
SO₂: average 6.7 µg/m³, week before 4.4 µg/m³

Last month there was more SO₂ and less PM10, PM2.5, NO₂, and O₃ in the air than the month before.

PM10: average 10.9 µg/m³, month before 20.1 µg/m³
PM2.5: average 4.5 µg/m³, month before 9.7 µg/m³
NO₂: average 10.2 µg/m³, month before 11.9 µg/m³
O₃: average 87.6 µg/m³, month before 111 µg/m³
SO₂: average 5.6 µg/m³, month before 4.5 µg/m³

Show

Particulate matter PM10

20.8

Nowµg/m³

Measured at 19:00

19.2

Last 24 hoursµg/m³

measured in 83 % of hours · provisional

19.4

Last 7 daysµg/m³

measured in 100 % of hours · provisional

12.8

Last 30 daysµg/m³

measured in 97 % of hours · provisional

too few readings

Last 12 months

measured in 82 % of hours · 2 months with too few readings · provisional

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

2 days above the limit.

above the limit
below the limit
too few readings for the day
no PM10 data in the EEA database

Days above the limit with values (2)

Jun 21 109
Jun 22 72

Values in µg/m³, limit 50 µg/m³.

Months of 2024

Month	Days above 50	Average	Highest day
January	0	12	23
February	0	17	35
March	0	15	47
April	0	12	43
May	0	12	38
June	2 above the number allowed	22	109
July	0	19	39
August	0	18	28
September	0	13	27
October	0	13	25
November	0	14	32
December	0	7	26

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: PM10 in µg/m³

Values as a table

Hour to	µg/m³	Note
Wednesday, 10/7
21:00	20	model estimate, not counted
20:00	21	model estimate, not counted
19:00	21	model estimate, not counted
18:00	18.8
17:00	17.4
16:00	16.4
15:00	15.4
14:00	16.5
13:00	16.6
12:00	17.7
11:00	27.8
10:00	30.4
09:00	22.7
08:00	18.5
07:00	16.8
06:00	16.2
05:00	17
04:00	16.9
03:00	18.1
02:00	18.3
01:00	19.4
Tuesday, 10/6
00:00	22.4
23:00	21.5
22:00	24.8
21:00	33.4
20:00	31.1
19:00	27.5
18:00	23.5
17:00	28.8
16:00	30.8
15:00	24.9
14:00	24.5
13:00	30
12:00	34.5
11:00	28
10:00	30.2
09:00	25.4
08:00	18.5
07:00	16.1
06:00	15.3
05:00	13
04:00	12.5
03:00	15.7
02:00	16.1
01:00	16.3
Monday, 10/5
00:00	18.5
23:00	21
22:00	19.1
21:00	20.7
20:00	24.6
19:00	19.2
18:00	17.9
17:00	15.1
16:00	12.5
15:00	18.5
14:00	23.6
13:00	25.9
12:00	30.6
11:00	45.2
10:00	32
09:00	20.3
08:00	16
07:00	12.8
06:00	12.6
05:00	13.5
04:00	15.6
03:00	16.8
02:00	17.3
01:00	16.4
Sunday, 10/4
00:00	16.6
23:00	17.1
22:00	16.1
21:00	18.8
20:00	19.8
19:00	19.9
18:00	18.1
17:00	14.9
16:00	14.9
15:00	14.7
14:00	14.8
13:00	16.2
12:00	28.8
11:00	28.2
10:00	19.1
09:00	20.2
08:00	19.4
07:00	19.7
06:00	19.8
05:00	18.9
04:00	18.4
03:00	19.2
02:00	18.3
01:00	17.7
Saturday, 10/3
00:00	17.6
23:00	17.8
22:00	19.1
21:00	19.8
20:00	20.2
19:00	17.3
18:00	16.8
17:00	15
16:00	13.8
15:00	15
14:00	14.7
13:00	16.4
12:00	19.6
11:00	21.5
10:00	23.6
09:00	25.9
08:00	25.1
07:00	25.5
06:00	22.8
05:00	21.4
04:00	21.1
03:00	20.8
02:00	20.9
01:00	21.5
Friday, 10/2
00:00	22.1
23:00	20
22:00	18.9
21:00	17.2
20:00	16.3
19:00	14.2
18:00	12.6
17:00	11.3
16:00	11.2
15:00	13.4
14:00	14.2
13:00	16.9
12:00	21.3
11:00	25.6
10:00	26.5
09:00	27.2
08:00	28.5
07:00	24.2
06:00	22.1
05:00	22.4
04:00	22
03:00	20.2
02:00	21.1
01:00	19.2
Thursday, 10/1
00:00	17.9
23:00	16.1
22:00	18.2
21:00	19.5
20:00	18.2
19:00	16.6
18:00	13.6
17:00	14.8
16:00	13.1
15:00	13.5
14:00	15.7
13:00	18.3
12:00	19.8
11:00	20.9
10:00	22.2
09:00	24.9
08:00	25.2
07:00	23.6
06:00	21.4
05:00	19.9
04:00	20.6
03:00	19.9
02:00	17.2
01:00	16.1
Wednesday, 9/30
00:00	15.1

too few readingsEU daily limit, 50 µg/m³

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

Values as a table

Day	µg/m³	Note
Tue, 10/6	23.5	provisional
Mon, 10/5	20.2	provisional
Sun, 10/4	18.7	provisional
Sat, 10/3	19.7	provisional
Fri, 10/2	19.5	provisional
Thu, 10/1	18.6	provisional
Wed, 9/30	15.4	provisional
Tue, 9/29	17	provisional
Mon, 9/28	19.5	provisional
Sun, 9/27	14.2	provisional
Sat, 9/26	6.4	provisional
Fri, 9/25	5.5	provisional
Thu, 9/24	26.4	provisional
Wed, 9/23	9.9	provisional
Tue, 9/22	10.6	provisional
Mon, 9/21	9.9	provisional
Sun, 9/20	9.6	provisional
Sat, 9/19	7.8	provisional
Fri, 9/18	10	provisional
Thu, 9/17	7.5	provisional
Wed, 9/16	7.5	provisional
Tue, 9/15	6.1	provisional
Mon, 9/14	8.2	provisional
Sun, 9/13	7.8	provisional
Sat, 9/12	6.5	provisional
Fri, 9/11	4.3	provisional
Thu, 9/10	10.5	provisional
Wed, 9/9	14.5	provisional
Tue, 9/8	15.9	provisional
Mon, 9/7		too few readings

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	a year earlier	Note
October 2026 so far	20.1	5.3	measured in 100 % of hours · provisional · year before: same days
September 2026	10.9	7.4	measured in 97 % of hours · provisional
August 2026	20.1	15.1	measured in 84 % of hours · provisional
July 2026	15.6	13.2	measured in 94 % of hours · provisional
June 2026	14.2	14.2	measured in 94 % of hours · provisional
May 2026	4.1	8.2	measured in 94 % of hours · provisional
April 2026	3.9	10.8	measured in 99 % of hours · provisional
March 2026	4.8	11.3	measured in 100 % of hours · provisional
February 2026	too few readings	16.7	measured in 26 % of hours · provisional
January 2026	too few readings	too few readings	measured in 49 % of hours · provisional
December 2025	too few readings	7.2	measured in 50 % of hours · verified
November 2025	5.4	14	measured in 100 % of hours · verified

PM10 by year

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

Measure	2026*	2025	2024	2023
Days above 50 µg/m³ (allowed 35)	0²	0²	2	2
Annual average, µg/m³ (EU limit 40)	too few	10.3	14.5	13
Highest daily average, µg/m³	35August 29	34March 9	109June 21	66February 2
Highest hourly value, µg/m³	128September 24	55January 1	129June 21	98July 22
Hours measured	83 %	91 %	95 %	92 %
Days without any reading from the station	0	1	0	1

* 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.

² Too few readings to compare with the number allowed: the figure covers only what was measured.

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.

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 45 µg/m³, 18 days allowed. In 2024 there were 3 such days.
WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2024 there were 3 such days.
EU from 2030: annual average 20 µg/m³. Average in 2024: 14 µg/m³.
WHO 2021: annual average 15 µg/m³. Average in 2024: 14 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

Day	Average	Times the limit
Jun 21, 2024	109	2.2 ×
Jun 22, 2024	72	1.4 ×

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

Particulate matter PM2.5

no measurement

Now

too few readings

Last 24 hours

measured in 0 % of hours

7.9

Last 7 daysµg/m³

measured in 98 % of hours · provisional

5.4

Last 30 daysµg/m³

measured in 99 % of hours · provisional

too few readings

Last 12 months

measured in 78 % of hours · 3 months with too few readings · provisional

Months of 2024

Month	Average	Highest day
January	8	16
February	10	25
March	8	16
April	6	17
May	6	17
June	11	48
July	10	23
August	10	16
September	7	13
October	7	15
November	9	22
December	too few	18

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
21:00	16.2
20:00	15.3
19:00	14.5
18:00	12.5
17:00	12.6
16:00	13.8
15:00	11.1
14:00	10
13:00	10.2
12:00	12.3
11:00	13.3
10:00	13.2
09:00	11.9
08:00	10.3
07:00	9.3
06:00	9.2
05:00	7.6
04:00	7.1
03:00	9.1
02:00	9
01:00	9.3
Monday, 10/5
00:00	10.6
23:00	11.6
22:00	10.3
21:00	10.3
20:00	10.7
19:00	8.8
18:00	8.5
17:00	6.7
16:00	4.8
15:00	6.1
14:00	7.7
13:00	7.8
12:00	9.3
11:00	11.8
10:00	9.5
09:00	7.3
08:00	7.5
07:00	6.7
06:00	6.5
05:00	7.1
04:00	8.2
03:00	9.1
02:00	8.7
01:00	8.5
Sunday, 10/4
00:00	8.5
23:00	8.8
22:00	8
21:00	9.5
20:00	10
19:00	10.1
18:00	7.4
17:00	5.7
16:00	4.8
15:00	5.1
14:00	5.3
13:00	6.5
12:00	16.1
11:00	12.9
10:00	8
09:00	8.6
08:00	8.7
07:00	9
06:00	9.2
05:00	9.3
04:00	9.1
03:00	9.3
02:00	8.7
01:00	8.2
Saturday, 10/3
00:00	8
23:00	8
22:00	8.1
21:00	8.1
20:00	8.3
19:00	7.1
18:00	6.3
17:00	5.4
16:00	4.7
15:00	4.9
14:00	4.7
13:00	5.6
12:00	7.2
11:00	7.8
10:00	7.9
09:00	8.5
08:00	9.4
07:00	10
06:00	9.2
05:00	8.2
04:00	7.8
03:00	7.9
02:00	7.9
01:00	7.8
Friday, 10/2
00:00	7.6
23:00	7.5
22:00	6.8
21:00	6.4
20:00	6.4
19:00	5.1
18:00	4.4
17:00	3.7
16:00	3.3
15:00	4.1
14:00	4.4
13:00	5.6
12:00	7.4
11:00	8.5
10:00	8.9
09:00	9
08:00	8.8
07:00	8.4
06:00	8
05:00	7.8
04:00	7.9
03:00	7.8
02:00	8.5
01:00	8.1
Thursday, 10/1
00:00	7.1
23:00	6.5
22:00	6.7
21:00	7
20:00	6.9
19:00	6
18:00	4.7
17:00	5.1
16:00	4.4
15:00	4.6
14:00	5.7
13:00	6.9
12:00	8.1
11:00	8.5
10:00	8.8
09:00	10
08:00	10.4
07:00	9.8
06:00	9.2
05:00	9.1
04:00	9.3
03:00	9.1
02:00	8.3
01:00	7.9
Wednesday, 9/30
00:00	7.9

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

Values as a table

Day	µg/m³	Note
Tue, 10/6	11.3	provisional
Mon, 10/5	8.5	provisional
Sun, 10/4	8.6	provisional
Sat, 10/3	7.5	provisional
Fri, 10/2	6.9	provisional
Thu, 10/1	7.5	provisional
Wed, 9/30	5.4	provisional
Tue, 9/29	7.9	provisional
Mon, 9/28	11.4	provisional
Sun, 9/27	9.1	provisional
Sat, 9/26	2.5	provisional
Fri, 9/25	2	provisional
Thu, 9/24	15.9	provisional
Wed, 9/23	3.6	provisional
Tue, 9/22	3.1	provisional
Mon, 9/21	3.4	provisional
Sun, 9/20	4.5	provisional
Sat, 9/19	3.5	provisional
Fri, 9/18	3.7	provisional
Thu, 9/17	3.1	provisional
Wed, 9/16	2.8	provisional
Tue, 9/15	2.1	provisional
Mon, 9/14	2.9	provisional
Sun, 9/13	2.8	provisional
Sat, 9/12	2.4	provisional
Fri, 9/11	1.2	provisional
Thu, 9/10	5	provisional
Wed, 9/9	6.3	provisional
Tue, 9/8	4.3	provisional
Mon, 9/7	2.7	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	8.3	2.7	measured in 98 % of hours · provisional · year before: same days
September 2026	4.5	3.3	measured in 99 % of hours · provisional
August 2026	9.7	8.3	measured in 85 % of hours · provisional
July 2026	8.3	7.2	measured in 99 % of hours · provisional
June 2026	7.5	9.4	measured in 96 % of hours · provisional
May 2026	2.6	5	measured in 99 % of hours · provisional
April 2026	2.7	6	measured in 100 % of hours · provisional
March 2026	3.4	6.7	measured in 100 % of hours · provisional
February 2026	too few readings	12.2	measured in 16 % of hours · provisional
January 2026	too few readings	too few readings	measured in 33 % of hours · provisional
December 2025	too few readings	too few readings	measured in 32 % of hours · verified
November 2025	3.2	9.3	measured in 83 % 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)	too few	too few	8.4	7.8¹
Highest daily average, µg/m³	19June 29	25February 11	48June 21	48February 2
Highest hourly value, µg/m³	99September 24	39January 1	63June 21	64February 2
Hours measured	82 %	87 %	91 %	87 %
Days without any reading from the station	0	1	0	1

* 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.

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

■ 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

EU from 2030: daily 25 µg/m³, 18 days allowed. In 2024 there were 2 such days.
WHO 2021: daily 15 µg/m³, at most three to four days a year. In 2024 there were 30 such days.
EU from 2030: annual average 10 µg/m³. Average in 2024: 8 µg/m³.
WHO 2021: annual average 5 µg/m³. Average in 2024: 8 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

23.6

Nowµg/m³

Measured at 19:00

16.4

Last 24 hoursµg/m³

measured in 83 % of hours · provisional

Last 7 daysµg/m³

measured in 100 % of hours · provisional

10.8

Last 30 daysµg/m³

measured in 100 % of hours · provisional

12.1

Last 12 monthsµg/m³

measured in 95 % of hours · provisional

Days in 2024: NO₂, at least one hour above 200 µg/m³

No measured day above the limit.

above the limit
below the limit
too few readings for the day
no NO₂ data in the EEA database

Months of 2024

Month	Average	Highest day
January	16	38
February	19	45
March	14	28
April	14	40
May	13	28
June	too few	27
July	11	23
August	13	23
September	11	22
October	too few	33
November	too few	21
December	11	33

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 countedEU hourly limit, 200 µg/m³

Last 7 days, every hour: NO₂ in µg/m³

Values as a table

Hour to	µg/m³	Note
Wednesday, 10/7
21:00	9	model estimate, not counted
20:00	10	model estimate, not counted
19:00	9	model estimate, not counted
18:00	17.8
17:00	20.9
16:00	23.8
15:00	11.4
14:00	21
13:00	13.6
12:00	13.3
11:00	46.6
10:00	38.4
09:00	22.2
08:00	21.1
07:00	12
06:00	5.2
05:00	5.1
04:00	5.8
03:00	6.2
02:00	8.4
01:00	8.8
Tuesday, 10/6
00:00	13.5
23:00	11.9
22:00	17.3
21:00	34.9
20:00	52.8
19:00	51.3
18:00	33.7
17:00	48
16:00	49.9
15:00	26.2
14:00	28.5
13:00	51.4
12:00	52.5
11:00	39.2
10:00	42.8
09:00	19.5
08:00	18.1
07:00	9.2
06:00	4
05:00	2.9
04:00	2.8
03:00	8.9
02:00	4.9
01:00	5.1
Monday, 10/5
00:00	12.4
23:00	8.6
22:00	13.8
21:00	20.1
20:00	28.1
19:00	25.1
18:00	30.5
17:00	24.9
16:00	22.4
15:00	27.4
14:00	32.6
13:00	39.2
12:00	43.8
11:00	47
10:00	37.5
09:00	10
08:00	10.5
07:00	7.6
06:00	4.6
05:00	4.8
04:00	3.1
03:00	5.4
02:00	5
01:00	3.6
Sunday, 10/4
00:00	5.4
23:00	7.5
22:00	7.8
21:00	21.5
20:00	22.4
19:00	20.6
18:00	19.1
17:00	13.2
16:00	23.6
15:00	16.4
14:00	13.7
13:00	31
12:00	80.8
11:00	55.3
10:00	9.1
09:00	6.9
08:00	4.4
07:00	3.3
06:00	2.7
05:00	2.9
04:00	4.1
03:00	3.9
02:00	3.5
01:00	3.1
Saturday, 10/3
00:00	3.8
23:00	3.6
22:00	5.6
21:00	3.7
20:00	4.6
19:00	4.4
18:00	3.6
17:00	4.1
16:00	8.2
15:00	13
14:00	6.2
13:00	6.5
12:00	5.3
11:00	4.8
10:00	5.1
09:00	4.5
08:00	3.9
07:00	3.5
06:00	3
05:00	2.7
04:00	2.7
03:00	3
02:00	3.1
01:00	3.3
Friday, 10/2
00:00	3.8
23:00	3.8
22:00	5.2
21:00	4.9
20:00	5
19:00	4.8
18:00	5.5
17:00	5.6
16:00	5.9
15:00	5.6
14:00	5.7
13:00	5.1
12:00	4.7
11:00	5.7
10:00	5.8
09:00	7.7
08:00	9.3
07:00	5
06:00	3
05:00	3
04:00	2.4
03:00	2.3
02:00	2.6
01:00	2.6
Thursday, 10/1
00:00	2.9
23:00	3.6
22:00	3.9
21:00	4.1
20:00	4.5
19:00	4.9
18:00	4.5
17:00	5.1
16:00	6.2
15:00	6.1
14:00	6.3
13:00	4.6
12:00	5.4
11:00	6.2
10:00	6.4
09:00	7.4
08:00	5.9
07:00	5.1
06:00	3.1
05:00	2.7
04:00	2.7
03:00	2.5
02:00	2.2
01:00	2.5
Wednesday, 9/30
00:00	9.6

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

Values as a table

Day	µg/m³	Note
Tue, 10/6	26.2	provisional
Mon, 10/5	19.5	provisional
Sun, 10/4	15.9	provisional
Sat, 10/3	4.7	provisional
Fri, 10/2	4.8	provisional
Thu, 10/1	4.5	provisional
Wed, 9/30	15	provisional
Tue, 9/29	12.7	provisional
Mon, 9/28	15.3	provisional
Sun, 9/27	5.7	provisional
Sat, 9/26	9.1	provisional
Fri, 9/25	6	provisional
Thu, 9/24	17.4	provisional
Wed, 9/23	10.5	provisional
Tue, 9/22	6.3	provisional
Mon, 9/21	6.1	provisional
Sun, 9/20	10.1	provisional
Sat, 9/19	3.9	provisional
Fri, 9/18	16.7	provisional
Thu, 9/17	11.3	provisional
Wed, 9/16	13.2	provisional
Tue, 9/15	6.3	provisional
Mon, 9/14	13.3	provisional
Sun, 9/13	7.4	provisional
Sat, 9/12	4.1	provisional
Fri, 9/11	3.5	provisional
Thu, 9/10	5.2	provisional
Wed, 9/9	13.9	provisional
Tue, 9/8	19.9	provisional
Mon, 9/7	15.3	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	12.6	7.9	measured in 100 % of hours · provisional · year before: same days
September 2026	10.2	14	measured in 100 % of hours · provisional
August 2026	11.9	10.5	measured in 85 % of hours · provisional
July 2026	11.3	too few readings	measured in 99 % of hours · provisional
June 2026	11.6	11.4	measured in 88 % of hours · provisional
May 2026	10.9	10.4	measured in 79 % of hours · provisional
April 2026	10.9	11.4	measured in 100 % of hours · provisional
March 2026	13.5	too few readings	measured in 100 % of hours · provisional
February 2026	14.2	11.8	measured in 100 % of hours · provisional
January 2026	11.2	9.2	measured in 100 % of hours · provisional
December 2025	16.2	10.8	measured in 99 % of hours · verified
November 2025	11.6	too few readings	measured in 100 % 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)	0	0²	0²	0
Hours above 400 µg/m³, three hours in a row (alert threshold)	0	0	0	0
Annual average, µg/m³ (EU limit 40)	11.8*	too few	too few	13.1
Highest daily average, µg/m³	37February 24	33September 18	45February 1	42February 21
Highest hourly value, µg/m³	81October 4	118September 18	105October 21	104October 3
Hours measured	94 %	87 %	89 %	92 %
Days without any reading from the station	0	1	0	1

* 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.

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 2024 there were 0 such days.
WHO 2021: daily 25 µg/m³, at most three to four days a year. In 2024 there were 22 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.

Ozone O₃

80.7

Nowµg/m³

Measured at 19:00

85.7

Last 24 hoursµg/m³

measured in 83 % of hours · provisional

101.3

Last 7 daysµg/m³

measured in 100 % of hours · provisional

86.8

Last 30 daysµg/m³

measured in 100 % of hours · provisional

79.5

Last 12 monthsµg/m³

measured in 96 % of hours · provisional

Days in 2024: O₃, 8-hour average above 120 µg/m³

13 days above the limit.

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 (13)

Jul 15 123
Jul 19 133
Jul 20 124
Jul 28 129
Aug 1 129
Aug 15 125
Aug 25 123
Aug 28 130
Aug 29 133
Aug 31 129
Sep 1 125
Sep 2 124
Sep 3 122

Values in µg/m³, limit 120 µg/m³.

Months of 2024

Month	Days above 120	Average	Highest 8 h
January	0	52	79
February	0	55	83
March	0	65	102
April	0	73	112
May	0	75	115
June	0	too few	113
July	4 above the number allowed	93	133
August	6 above the number allowed	97	133
September	3 above the number allowed	77	125
October	0	too few	90
November	0	too few	73
December	0	56	78

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
21:00	79	model estimate, not counted
20:00	79	model estimate, not counted
19:00	83	model estimate, not counted
18:00	93.7
17:00	89.9
16:00	90.7
15:00	105.7
14:00	91.6
13:00	95.8
12:00	92.3
11:00	48.3
10:00	59.3
09:00	80.9
08:00	73.8
07:00	88
06:00	97.2
05:00	92.1
04:00	89.5
03:00	84.9
02:00	84.2
01:00	84.3
Tuesday, 10/6
00:00	80.8
23:00	90.3
22:00	80.4
21:00	61.4
20:00	48.1
19:00	53
18:00	80.1
17:00	71.6
16:00	66.3
15:00	94.1
14:00	90.6
13:00	59.4
12:00	42.3
11:00	54.2
10:00	45.2
09:00	82.7
08:00	90.4
07:00	93.8
06:00	105.4
05:00	100.9
04:00	101
03:00	96.2
02:00	98.7
01:00	97
Monday, 10/5
00:00	96.3
23:00	102
22:00	93.5
21:00	79.9
20:00	77.2
19:00	87.6
18:00	86.5
17:00	99.4
16:00	101.8
15:00	90.2
14:00	73
13:00	63.3
12:00	59.3
11:00	47.8
10:00	59.2
09:00	95.5
08:00	98
07:00	91.6
06:00	93.3
05:00	96.5
04:00	106.8
03:00	97.7
02:00	104
01:00	107.4
Sunday, 10/4
00:00	104.1
23:00	100.9
22:00	105.9
21:00	91.4
20:00	99.9
19:00	106.3
18:00	112.8
17:00	122.4
16:00	111.7
15:00	118.1
14:00	115.7
13:00	92.6
12:00	52.5
11:00	57
10:00	100.3
09:00	103.6
08:00	109.4
07:00	112.6
06:00	116.1
05:00	112.7
04:00	111.6
03:00	116.2
02:00	116.8
01:00	118.6
Saturday, 10/3
00:00	119
23:00	119.1
22:00	118.7
21:00	121.3
20:00	122
19:00	122.4
18:00	123.1
17:00	120.2
16:00	113.4
15:00	113.9
14:00	115.7
13:00	118.2
12:00	120.5
11:00	122.2
10:00	120.3
09:00	120.3
08:00	122.8
07:00	122.7
06:00	121.3
05:00	117.4
04:00	117
03:00	115.1
02:00	115
01:00	115.3
Friday, 10/2
00:00	116.8
23:00	117.5
22:00	114.3
21:00	117.1
20:00	116.9
19:00	112.5
18:00	110.3
17:00	110.1
16:00	108.1
15:00	105.8
14:00	105.3
13:00	106.7
12:00	110.3
11:00	109.3
10:00	107.6
09:00	104.4
08:00	105.5
07:00	113.2
06:00	115.1
05:00	114.5
04:00	114.6
03:00	115.4
02:00	116.3
01:00	116.6
Thursday, 10/1
00:00	115
23:00	113
22:00	113.4
21:00	114.8
20:00	113.4
19:00	113.8
18:00	109.1
17:00	104.2
16:00	98.9
15:00	99.6
14:00	100.3
13:00	105.8
12:00	105
11:00	102.6
10:00	101.5
09:00	101.6
08:00	102.9
07:00	105.9
06:00	109.4
05:00	111.9
04:00	114.2
03:00	114.2
02:00	113.7
01:00	112.8
Wednesday, 9/30
00:00	102.2

day above the limittarget value, 120 µg/m³

Last 30 days, highest 8-hour average of the day: O₃ in µg/m³ · 2 days above the limit

Values as a table

Day	µg/m³	Note
Tue, 10/6	99.7	provisional
Mon, 10/5	103.6	provisional
Sun, 10/4	120.5	above the limit · provisional
Sat, 10/3	121	above the limit · provisional
Fri, 10/2	115.1	provisional
Thu, 10/1	112.1	provisional
Wed, 9/30	107.7	provisional
Tue, 9/29	117.7	provisional
Mon, 9/28	100.7	provisional
Sun, 9/27	99.9	provisional
Sat, 9/26	92.4	provisional
Fri, 9/25	81.5	provisional
Thu, 9/24	77.8	provisional
Wed, 9/23	80.8	provisional
Tue, 9/22	89.2	provisional
Mon, 9/21	86.2	provisional
Sun, 9/20	88.5	provisional
Sat, 9/19	88.5	provisional
Fri, 9/18	83.7	provisional
Thu, 9/17	79.6	provisional
Wed, 9/16	91.3	provisional
Tue, 9/15	91.4	provisional
Mon, 9/14	99.9	provisional
Sun, 9/13	100.4	provisional
Sat, 9/12	93.6	provisional
Fri, 9/11	73.7	provisional
Thu, 9/10	80	provisional
Wed, 9/9	103.7	provisional
Tue, 9/8	116	provisional
Mon, 9/7	115.6	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	101.7	62.5	measured in 100 % of hours · provisional · year before: same days
September 2026	87.6	62.1	measured in 100 % of hours · provisional
August 2026	111	91.1	measured in 100 % of hours · provisional
July 2026	105.2	too few readings	measured in 100 % of hours · provisional
June 2026	94	98.6	measured in 88 % of hours · provisional
May 2026	86.6	83.8	measured in 79 % of hours · provisional
April 2026	95	82.8	measured in 100 % of hours · provisional
March 2026	77.7	too few readings	measured in 100 % of hours · provisional
February 2026	61	64.5	measured in 100 % of hours · provisional
January 2026	62	61.9	measured in 100 % of hours · provisional
December 2025	47.3	55.8	measured in 99 % of hours · verified
November 2025	58.6	too few readings	measured in 93 % 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)	47	≥ 24²	≥ 13²	5
Annual average, µg/m³	87.1*	too few	too few	70.1
Highest 8-hour average, µg/m³	155August 15	141June 15	133July 19	134June 22
Hours measured	96 %	87 %	89 %	92 %
Days without any reading from the station	0	1	0	1

* 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 2024

Day	Highest 8 h	Times the limit
Jul 19, 2024	133	1.1 ×
Aug 29, 2024	133	1.1 ×
Aug 28, 2024	130	1.1 ×
Aug 1, 2024	129	1.1 ×
Aug 31, 2024	129	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

3.7

Nowµg/m³

Measured at 19:00

10.3

Last 24 hoursµg/m³

measured in 83 % of hours · provisional

6.7

Last 7 daysµg/m³

measured in 99 % of hours · provisional

5.8

Last 30 daysµg/m³

measured in 99 % of hours · provisional

4.6

Last 12 monthsµg/m³

measured in 95 % of hours · provisional

Days in 2024: 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 2024

Month	Hours above 350	Average	Highest day
January	0	4	7
February	0	4	6
March	0	3	6
April	0	4	7
May	0	4	7
June	0	too few	18
July	0	4	13
August	0	4	13
September	0	5	13
October	0	too few	14
November	0	too few	13
December	1	7	50

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
18:00	4.7
17:00	3.2
16:00	3.1
15:00	3.4
14:00	4.3
13:00	5.7
12:00	19
11:00	20.3
10:00	12
09:00	39.8
08:00	14.5
07:00	14.5
06:00	11
05:00	7.8
04:00	6.3
03:00	5.8
02:00	4.8
01:00	6.5
Tuesday, 10/6
00:00	7.7
23:00	11.6
22:00	15.1
21:00	25.1
20:00	23.3
19:00	15.5
18:00	22.4
17:00	26.3
16:00	31.8
15:00	46
14:00	31.5
13:00	8.3
12:00	5.3
11:00	4.7
10:00	4.6
09:00	5.1
08:00	4.9
07:00	4.6
06:00	5.2
05:00	4
04:00	3.5
03:00	3.2
02:00	3.4
01:00	3.5
Monday, 10/5
00:00	4.6
23:00	5.2
22:00	5.6
21:00	7.6
20:00	9
19:00	5.6
18:00	6.3
17:00	6.8
16:00	7
15:00	8.8
14:00	5.4
13:00	5.6
12:00	5.4
11:00	5.6
10:00	4.4
09:00	4.9
08:00	11.7
07:00	3.7
06:00	3.8
05:00	4.3
04:00	4.8
03:00	4.2
02:00	5
01:00	4.5
Sunday, 10/4
00:00	5
23:00	5.6
22:00	6.4
21:00	7.5
20:00	8.5
19:00	9.5
18:00	8.2
17:00	7.1
16:00	9
15:00	10.4
14:00	17
13:00	71.5
12:00	41
11:00	5.8
10:00	6.5
09:00	5.8
08:00	6.2
07:00	5.1
06:00	4.6
05:00	4.2
04:00	4.2
03:00	5.4
02:00	4.6
01:00	4.7
Saturday, 10/3
00:00	5
23:00	4.1
22:00	4.6
21:00	4.3
20:00	3.8
19:00	3.2
18:00	3.8
17:00	4.1
16:00	4.5
15:00	6.1
14:00	5.9
13:00	8.3
12:00	8.9
11:00	5.1
10:00	3.6
09:00	2.6
08:00	4.1
07:00	3.6
06:00	2.9
05:00	1.4
04:00	1.2
03:00	1.2
02:00	1.3
01:00	1.2
Friday, 10/2
00:00	0.8
23:00	0.6
22:00	1.4
21:00	1.5
20:00	2
19:00	0
18:00	2.1
17:00	3.7
16:00	5
15:00	4.5
14:00	3.9
13:00	4.3
12:00	5.6
11:00	6.9
10:00	9.5
09:00	13.3
08:00	10.6
07:00	8.9
06:00	5.3
05:00	4.6
04:00	3.3
03:00	2.5
02:00	3.8
01:00	4.1
Thursday, 10/1
00:00	2.9
23:00	2
22:00	2.9
21:00	3.1
20:00	2.8
19:00	3.3
18:00	2.7
17:00	2.7
16:00	2.6
15:00	3.1
14:00	3.8
13:00	5
12:00	5
11:00	7.2
10:00	9
09:00	9
08:00	8.2
07:00	6.1
06:00	6.1
05:00	5.4
04:00	5.2
03:00	4.6
02:00	4.4
01:00	4.1
Wednesday, 9/30
00:00	2.8

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

Values as a table

Day	µg/m³	Note
Tue, 10/6	13.2	provisional
Mon, 10/5	5.8	provisional
Sun, 10/4	11	provisional
Sat, 10/3	4	provisional
Fri, 10/2	4.5	provisional
Thu, 10/1	4.6	provisional
Wed, 9/30	3.6	provisional
Tue, 9/29	4.1	provisional
Mon, 9/28	10.1	provisional
Sun, 9/27	6	provisional
Sat, 9/26	1.6	provisional
Fri, 9/25	0.9	provisional
Thu, 9/24	6.6	provisional
Wed, 9/23	1.5	provisional
Tue, 9/22	0.9	provisional
Mon, 9/21	6.5	provisional
Sun, 9/20	2.9	provisional
Sat, 9/19	1.8	provisional
Fri, 9/18	19.3	provisional
Thu, 9/17	8.2	provisional
Wed, 9/16	10	provisional
Tue, 9/15	0.9	provisional
Mon, 9/14	18.8	provisional
Sun, 9/13	1	provisional
Sat, 9/12	0.9	provisional
Fri, 9/11	1.4	provisional
Thu, 9/10	5	provisional
Wed, 9/9	9.9	provisional
Tue, 9/8	4.4	provisional
Mon, 9/7	4.8	provisional

Last 12 monthsthis month so fara 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	7.2	2.6	measured in 100 % of hours · provisional · year before: same days
September 2026	5.6	5.3	measured in 99 % of hours · provisional
August 2026	4.5	4.2	measured in 100 % of hours · provisional
July 2026	2.9	too few readings	measured in 99 % of hours · provisional
June 2026	2.5	4.4	measured in 80 % of hours · provisional
May 2026	5.6	4.4	measured in 79 % of hours · provisional
April 2026	5.3	5.8	measured in 100 % of hours · provisional
March 2026	3.4	too few readings	measured in 100 % of hours · provisional
February 2026	4.3	4.1	measured in 100 % of hours · provisional
January 2026	5.6	3.3	measured in 100 % of hours · provisional
December 2025	5.7	6.5	measured in 91 % of hours · verified
November 2025	4.2	too few readings	measured in 100 % 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)	0	0²	0²	0
Hours above 350 µg/m³ (allowed 24)	0	0²	≥ 1²	0
Hours above 500 µg/m³, three hours in a row (alert threshold)	0	0	0	0
Annual average, µg/m³	4.5*	too few	too few	4.8
Highest daily average, µg/m³	19September 18	19December 14	50December 31	16October 2
Highest hourly value, µg/m³	196April 25	126February 21	533December 31	118August 25
Hours measured	95 %	87 %	85 %	91 %
Days without any reading from the station	0	1	0	1

* 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.

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 2024 there was 1 such day.
WHO 2021: daily 40 µg/m³, at most three to four days a year. In 2024 there was 1 such day.

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: 1

1 outage, 26 hours in total in the last 12 months.

Timeline of outages from October 7, 2025 to today

From	To	Duration
Jun 4, 2026 09:00	Jun 5, 2026 11:00	26 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 Državna mreža za trajno praćenje kvalitete zraka. 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, Rijeka-2 station, https://samoeko.com/en/luft/stanica/HR0005A, accessed 7 October 2026. Readings: official stations, via the European Environment Agency (EEA). The level is calculated by samoEKO.

Rules for reuse

samoEKO is a brand of samoLabs, Juelich.