Air at the Travnik station

Travnik, Central Bosnia Canton · Federation of Bosnia and Herzegovina

Network: Federal Hydrometeorological Institute · Station code: BA0062A

This year, up to the last reading (August 6)

at least

8 days

with a daily average of sulphur dioxide (SO₂) above the legal limit of 125 µg/m³.

3 days are allowed in the whole year.

at least 5 days more than allowed

at least

18 hours

with sulphur dioxide (SO₂) above the legal hourly limit of 350 µg/m³.

Readings are missing for part of the period, so the real number may be higher.

Worst day: January 23, 2026, SO₂ 291 µg/m³ as a daily average, 2.3 times the limit.

At least 3 days with a daily average of PM10 above 150 µg/m³, the warning threshold in the Federation of BiH.

These are measured values only. Whether a warning or alert episode has been declared is decided and published by the competent authorities.

Also: at least 18 days above the legal daily limit for PM10 of 50 µg/m³ (too few readings to compare with the allowed number).

Daily average for 147 of 280 days · data for 2026 not yet finally verified · Yardstick: legal limits in the Federation of BiH (Pravilnik, Official Gazette FBiH 1/12, 50/19, 3/21)

All figures by year and month

No data has arrived from this station since August 6, 2026 at 13:00

No reading for 62 days.

On the FHMZ website, too, the last values of this station are from August 6, 2026 (checked on October 7, 2026). The station on the FHMZ website

Last reading: August 6, 2026 at 13:00
Measured then: PM10 21.7 µg/m³, PM2.5 13.2 µg/m³

All outages of this station

Nearest station measuring now: Zenica - Brist, Zenica, about 19 km away.

That reading is from another place. Your air may be better or worse.

Go to that station

How the air is changing

There are not enough readings to compare with the week before.

PM10: too few readings to compare
PM2.5: too few readings to compare
NO₂: too few readings to compare
O₃: too few readings to compare
SO₂: too few readings to compare

There are not enough readings to compare with the month before.

PM10: too few readings to compare
PM2.5: too few readings to compare
NO₂: too few readings to compare
O₃: too few readings to compare
SO₂: too few readings to compare

Show

Particulate matter PM10

no measurement

Now

too few readings

Last 24 hours

measured in 0 % of hours

too few readings

Last 7 days

measured in 0 % of hours

too few readings

Last 30 days

measured in 0 % of hours

too few readings

Last 12 months

measured in 51 % of hours · provisional

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

50 days above the limit. 12 days without any reading from the station.

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

Days above the limit with values (50)

Jan 2 54
Jan 5 57
Jan 25 56
Jan 26 71
Jan 27 59
Jan 29 69
Jan 30 76
Jan 31 95
Feb 1 123
Feb 2 89
Feb 3 74
Feb 4 58
Feb 5 73
Feb 15 52
Feb 26 55
Feb 27 51
Feb 29 52
Mar 1 69
Mar 5 52
Mar 27 67
Mar 28 70
Mar 31 62
Apr 1 132
May 11 62
May 12 178
May 13 158
May 14 158
May 15 158
May 16 158
Nov 21 53
Nov 23 86
Nov 24 92
Nov 25 79
Nov 26 90
Nov 27 104
Nov 28 77
Dec 8 59
Dec 9 69
Dec 14 60
Dec 15 69
Dec 16 56
Dec 17 68
Dec 18 67
Dec 19 86
Dec 22 72
Dec 27 87
Dec 28 119
Dec 29 128
Dec 30 133
Dec 31 133

Values in µg/m³, limit 50 µg/m³.

Months of 2024

Month	Days above 50	Average	Highest day	No readings
January	8 above the number allowed	31	95	0
February	9 above the number allowed	46	123	0
March	5 above the number allowed	37	70	0
April	1 above the number allowed	35	132	0
May	6 above the number allowed	too few	178	0
June				0
July				0
August				0
September				0
October				10
November	7 above the number allowed	too few	104	2
December	14 above the number allowed	56	133	0

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.

There are no readings for this period.

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

no data from the station

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

Values as a table

Day	µg/m³	Note
Wed, 10/7		no data from the station
Tue, 10/6		no data from the station
Mon, 10/5		no data from the station
Sun, 10/4		no data from the station
Sat, 10/3		no data from the station
Fri, 10/2		no data from the station
Thu, 10/1		no data from the station
Wed, 9/30		no data from the station
Tue, 9/29		no data from the station
Mon, 9/28		no data from the station
Sun, 9/27		no data from the station
Sat, 9/26		no data from the station
Fri, 9/25		no data from the station
Thu, 9/24		no data from the station
Wed, 9/23		no data from the station
Tue, 9/22		no data from the station
Mon, 9/21		no data from the station
Sun, 9/20		no data from the station
Sat, 9/19		no data from the station
Fri, 9/18		no data from the station
Thu, 9/17		no data from the station
Wed, 9/16		no data from the station
Tue, 9/15		no data from the station
Mon, 9/14		no data from the station
Sun, 9/13		no data from the station
Sat, 9/12		no data from the station
Fri, 9/11		no data from the station
Thu, 9/10		no data from the station
Wed, 9/9		no data from the station
Tue, 9/8		no data from the station

Last 12 monthsa year earlierlegal 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

Month	µg/m³	a year earlier	Note
October 2026 so far	too few readings		7 days without data from the station
September 2026	too few readings		30 days without data from the station
August 2026	too few readings		measured in 18 % of hours · provisional · 25 days without data from the station
July 2026	16.5		measured in 91 % of hours · provisional · 1 day without data from the station
June 2026	too few readings		measured in 50 % of hours · provisional · 12 days without data from the station
May 2026	10.3		measured in 94 % of hours · provisional
April 2026	15.7		measured in 79 % of hours · provisional · 4 days without data from the station
March 2026	23.6		measured in 100 % of hours · provisional
February 2026	33.4		measured in 100 % of hours · provisional
January 2026	74.7		measured in 88 % of hours · provisional · 2 days without data from the station
December 2025	too few readings	56	31 days without data from the station
November 2025	too few readings	too few readings	30 days without data from the station

PM10 by year

Yardstick: legal limits in the Federation of BiH (Pravilnik, Official Gazette FBiH 1/12, 50/19, 3/21)

Measure	2026*	2024	2023
Days above 50 µg/m³ (allowed 35)	≥ 18²	≥ 50 above the number allowed	59 above the number allowed
Days above 150 µg/m³ (warning threshold FBiH)	≥ 3 above the number allowed	≥ 5 above the number allowed	1 above the number allowed
Days above 300 µg/m³ (alert threshold FBiH)	0	0	0
Annual average, µg/m³ (legal limit 40)	too few	too few	37.4
Highest daily average, µg/m³	256January 23	178May 12	158December 29
Highest hourly value, µg/m³	312January 23	383November 18	268December 29
Hours measured	67 %	49 %	100 %
Days without any reading from the station	81	12	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.

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.

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

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 60 such days.
WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2024 there were 60 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 2024

Day	Average	Times the limit
May 12, 2024	178	3.6 ×
May 13, 2024	158	3.2 ×
May 14, 2024	158	3.2 ×
May 15, 2024	158	3.2 ×
May 16, 2024	158	3.2 ×

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

too few readings

Last 7 days

measured in 0 % of hours

too few readings

Last 30 days

measured in 0 % of hours

too few readings

Last 12 months

measured in 51 % of hours · provisional

Months of 2024

Month	Average	Highest day	No readings
January	43	107	0
February	25	61	0
March	15	36	0
April	9	32	0
May	7	15	0
June	10	28	0
July	10	21	0
August	11	20	0
September	8	16	0
October	too few	67	10
November	73	188	2
December	too few	191	0

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.

There are no readings for this period.

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

no data from the station

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

Values as a table

Day	µg/m³	Note
Wed, 10/7		no data from the station
Tue, 10/6		no data from the station
Mon, 10/5		no data from the station
Sun, 10/4		no data from the station
Sat, 10/3		no data from the station
Fri, 10/2		no data from the station
Thu, 10/1		no data from the station
Wed, 9/30		no data from the station
Tue, 9/29		no data from the station
Mon, 9/28		no data from the station
Sun, 9/27		no data from the station
Sat, 9/26		no data from the station
Fri, 9/25		no data from the station
Thu, 9/24		no data from the station
Wed, 9/23		no data from the station
Tue, 9/22		no data from the station
Mon, 9/21		no data from the station
Sun, 9/20		no data from the station
Sat, 9/19		no data from the station
Fri, 9/18		no data from the station
Thu, 9/17		no data from the station
Wed, 9/16		no data from the station
Tue, 9/15		no data from the station
Mon, 9/14		no data from the station
Sun, 9/13		no data from the station
Sat, 9/12		no data from the station
Fri, 9/11		no data from the station
Thu, 9/10		no data from the station
Wed, 9/9		no data from the station
Tue, 9/8		no data from the station

Last 12 monthsa year earlierlegal annual limit, 25 µg/m³month with days without data from the station

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	too few readings		7 days without data from the station
September 2026	too few readings		30 days without data from the station
August 2026	too few readings		measured in 18 % of hours · provisional · 25 days without data from the station
July 2026	10.5		measured in 91 % of hours · provisional · 1 day without data from the station
June 2026	too few readings		measured in 50 % of hours · provisional · 12 days without data from the station
May 2026	6.6		measured in 94 % of hours · provisional
April 2026	10.9		measured in 79 % of hours · provisional · 4 days without data from the station
March 2026	19.9		measured in 100 % of hours · provisional
February 2026	30		measured in 100 % of hours · provisional
January 2026	72.4		measured in 88 % of hours · provisional · 2 days without data from the station
December 2025	too few readings	too few readings	31 days without data from the station
November 2025	too few readings	73.4	30 days without data from the station

PM2.5 by year

Yardstick: legal limits in the Federation of BiH (Pravilnik, Official Gazette FBiH 1/12, 50/19, 3/21)

Measure	2026*	2024
Days above 140 µg/m³ (warning threshold FBiH)	≥ 3 above the number allowed	7 above the number allowed
Days above 280 µg/m³ (alert threshold FBiH)	0	0
Annual average, µg/m³ (legal limit 25)	too few	23.2
Highest daily average, µg/m³	251January 23	191December 18
Highest hourly value, µg/m³	306January 23	358December 17
Hours measured	67 %	93 %
Days without any reading from the station	81	12

* 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.

■ 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.

Compared with the new EU rules and the WHO recommendation

EU from 2030: daily 25 µg/m³, 18 days allowed. In 2024 there were 84 such days.
WHO 2021: daily 15 µg/m³, at most three to four days a year. In 2024 there were 135 such days.
EU from 2030: annual average 10 µg/m³. Average in 2024: 23 µg/m³.
WHO 2021: annual average 5 µg/m³. Average in 2024: 23 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

no measurement

Now

too few readings

Last 24 hours

measured in 0 % of hours

too few readings

Last 7 days

measured in 0 % of hours

too few readings

Last 30 days

measured in 0 % of hours

too few readings

Last 12 months

measured in 20 % of hours · provisional

Days in 2024: NO₂, daily average above 85 µg/m³

No measured day above the limit. 12 days without any reading from the station.

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

Months of 2024

Month	Average	Highest day	No readings
January	27	50	0
February	21	40	0
March	13	20	0
April	9	14	0
May	7	11	0
June	5	8	0
July	6	9	0
August	7	11	0
September	8	14	0
October	too few	26	10
November	25	46	2
December	too few	38	0

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.

There are no readings for this period.

Last 7 days, every hour: NO₂ in µg/m³

no data from the station

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

Values as a table

Day	µg/m³	Note
Wed, 10/7		no data from the station
Tue, 10/6		no data from the station
Mon, 10/5		no data from the station
Sun, 10/4		no data from the station
Sat, 10/3		no data from the station
Fri, 10/2		no data from the station
Thu, 10/1		no data from the station
Wed, 9/30		no data from the station
Tue, 9/29		no data from the station
Mon, 9/28		no data from the station
Sun, 9/27		no data from the station
Sat, 9/26		no data from the station
Fri, 9/25		no data from the station
Thu, 9/24		no data from the station
Wed, 9/23		no data from the station
Tue, 9/22		no data from the station
Mon, 9/21		no data from the station
Sun, 9/20		no data from the station
Sat, 9/19		no data from the station
Fri, 9/18		no data from the station
Thu, 9/17		no data from the station
Wed, 9/16		no data from the station
Tue, 9/15		no data from the station
Mon, 9/14		no data from the station
Sun, 9/13		no data from the station
Sat, 9/12		no data from the station
Fri, 9/11		no data from the station
Thu, 9/10		no data from the station
Wed, 9/9		no data from the station
Tue, 9/8		no data from the station

Last 12 monthsa year earlierlegal annual limit, 40 µg/m³month with days without data from the station

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

Values as a table

Month	µg/m³	a year earlier	Note
October 2026 so far	too few readings		7 days without data from the station
September 2026	too few readings		30 days without data from the station
August 2026	too few readings		25 days without data from the station
July 2026	too few readings		1 day without data from the station
June 2026	too few readings		measured in 45 % of hours · provisional · 12 days without data from the station
May 2026	too few readings		measured in 12 % of hours · provisional
April 2026	too few readings		4 days without data from the station
March 2026	too few readings		measured in 5 % of hours · provisional
February 2026	13.3		measured in 95 % of hours · provisional
January 2026	29.8		measured in 88 % of hours · provisional · 2 days without data from the station
December 2025	too few readings	too few readings	31 days without data from the station
November 2025	too few readings	24.5	30 days without data from the station

NO₂ by year

Yardstick: legal limits in the Federation of BiH (Pravilnik, Official Gazette FBiH 1/12, 50/19, 3/21)

Measure	2026*	2024
Days above 85 µg/m³ (none allowed)	0²	0²
Hours above 200 µg/m³ (allowed 18)	0²	0²
Hours above 400 µg/m³, three hours in a row (alert threshold)	0	0
Annual average, µg/m³ (legal limit 40)	too few	13.9¹
Highest daily average, µg/m³	58January 15	50January 15
Highest hourly value, µg/m³	120January 14	86January 31
Hours measured	26 %	85 %
Days without any reading from the station	81	12

* 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.

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 40 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

no measurement

Now

too few readings

Last 24 hours

measured in 0 % of hours

too few readings

Last 7 days

measured in 0 % of hours

too few readings

Last 30 days

measured in 0 % of hours

too few readings

Last 12 months

measured in 4 % of hours · provisional

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

136 days above the limit. 12 days without any reading from the station.

above the limit
below the limit
too few readings for the day
no O₃ data in the EEA database
no data from the station

Days above the limit with values (136)

Feb 23 127
Feb 24 139
Feb 28 122
Mar 5 125
Mar 11 126
Mar 21 122
Mar 22 129
Mar 23 131
Mar 28 126
Mar 29 126
Mar 31 129
Apr 1 126
Apr 2 131
Apr 3 122
Apr 4 124
Apr 5 131
Apr 6 137
Apr 7 143
Apr 8 147
Apr 9 145
Apr 10 150
Apr 11 125
Apr 12 137
Apr 13 152
Apr 14 144
Apr 15 160
Apr 16 172
Apr 18 130
Apr 19 131
Apr 20 139
Apr 21 139
Apr 25 123
Apr 26 124
Apr 27 125
Apr 28 140
Apr 29 152
Apr 30 148
May 2 131
May 4 145
May 5 138
May 8 143
May 10 146
May 11 158
May 12 146
May 13 150
May 14 122
May 17 142
May 18 143
May 19 143
May 22 123
May 23 127
May 25 130
May 27 125
May 29 124
May 30 128
Jun 1 142
Jun 2 144
Jun 4 152
Jun 5 133
Jun 6 153
Jun 7 153
Jun 8 154
Jun 9 124
Jun 10 141
Jun 11 120
Jun 14 130
Jun 16 146
Jun 17 151
Jun 18 151
Jun 19 139
Jun 20 134
Jun 29 146
Jun 30 126
Jul 1 135
Jul 5 144
Jul 6 121
Jul 7 143
Jul 8 149
Jul 9 173
Jul 10 180
Jul 11 168
Jul 12 153
Jul 13 150
Jul 14 144
Jul 15 158
Jul 16 141
Jul 17 149
Jul 18 161
Jul 19 184
Jul 20 149
Jul 21 134
Jul 22 135
Jul 23 144
Jul 24 128
Jul 25 131
Jul 26 151
Jul 27 161
Jul 28 148
Jul 29 150
Jul 30 146
Jul 31 176
Aug 1 171
Aug 2 152
Aug 3 147
Aug 4 156
Aug 5 148
Aug 6 131
Aug 7 156
Aug 8 142
Aug 9 153
Aug 10 132
Aug 11 163
Aug 12 159
Aug 13 182
Aug 14 159
Aug 15 162
Aug 16 172
Aug 17 155
Aug 18 137
Aug 20 123
Aug 21 146
Aug 22 148
Aug 23 164
Aug 24 156
Aug 25 174
Aug 26 162
Aug 27 148
Aug 28 156
Aug 29 152
Aug 30 151
Aug 31 146
Sep 1 156
Sep 2 167
Sep 3 162
Sep 4 160
Sep 5 125

Values in µg/m³, limit 120 µg/m³.

Months of 2024

Month	Days above 120	Average	Highest 8 h	No readings
January	0	41	97	0
February	3 above the number allowed	57	139	0
March	8 above the number allowed	73	131	0
April	26 above the number allowed	91	172	0
May	18 above the number allowed	86	158	0
June	18 above the number allowed	80	154	0
July	28 above the number allowed	95	184	0
August	30 above the number allowed	103	182	0
September	5 above the number allowed	too few	167	0
October	0	too few	87	10
November	0	29	84	2
December	0	too few	70	0

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.

There are no readings for this period.

Last 7 days, every hour: O₃ in µg/m³

no data from the station

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		no data from the station
Tue, 10/6		no data from the station
Mon, 10/5		no data from the station
Sun, 10/4		no data from the station
Sat, 10/3		no data from the station
Fri, 10/2		no data from the station
Thu, 10/1		no data from the station
Wed, 9/30		no data from the station
Tue, 9/29		no data from the station
Mon, 9/28		no data from the station
Sun, 9/27		no data from the station
Sat, 9/26		no data from the station
Fri, 9/25		no data from the station
Thu, 9/24		no data from the station
Wed, 9/23		no data from the station
Tue, 9/22		no data from the station
Mon, 9/21		no data from the station
Sun, 9/20		no data from the station
Sat, 9/19		no data from the station
Fri, 9/18		no data from the station
Thu, 9/17		no data from the station
Wed, 9/16		no data from the station
Tue, 9/15		no data from the station
Mon, 9/14		no data from the station
Sun, 9/13		no data from the station
Sat, 9/12		no data from the station
Fri, 9/11		no data from the station
Thu, 9/10		no data from the station
Wed, 9/9		no data from the station
Tue, 9/8		no data from the station

Last 12 monthsa year earliermonth with days without data from the station

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

Values as a table

Month	µg/m³	a year earlier	Note
October 2026 so far	too few readings		7 days without data from the station
September 2026	too few readings		30 days without data from the station
August 2026	too few readings		25 days without data from the station
July 2026	too few readings		1 day without data from the station
June 2026	too few readings		measured in 45 % of hours · provisional · 12 days without data from the station
May 2026	too few readings
April 2026	too few readings		4 days without data from the station
March 2026	too few readings
February 2026	too few readings
January 2026	too few readings		2 days without data from the station
December 2025	too few readings	too few readings	31 days without data from the station
November 2025	too few readings	29.4	30 days without data from the station

O₃ by year

Yardstick: legal limits in the Federation of BiH (Pravilnik, Official Gazette FBiH 1/12, 50/19, 3/21)

Measure	2026*	2024
Days with 8-hour average above 120 µg/m³ (target value 25)	0²	≥ 136
Annual average, µg/m³	too few	too few
Highest 8-hour average, µg/m³	115June 8	184July 19
Hours measured	5 %	88 %
Days without any reading from the station	81	12

* 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 worst days of 2024

Day	Highest 8 h	Times the limit
Jul 19, 2024	184	1.5 ×
Aug 13, 2024	182	1.5 ×
Jul 10, 2024	180	1.5 ×
Jul 31, 2024	176	1.5 ×
Aug 25, 2024	174	1.5 ×

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

no measurement

Now

too few readings

Last 24 hours

measured in 0 % of hours

too few readings

Last 7 days

measured in 0 % of hours

too few readings

Last 30 days

measured in 0 % of hours

too few readings

Last 12 months

measured in 42 % of hours · provisional

Days in 2024: SO₂, daily average above 125 µg/m³

7 days above the limit. 12 days without any reading from the station.

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

Days above the limit with values (7)

Jan 15 126
Jan 22 138
Jan 23 170
Jan 24 184
Jan 26 128
Nov 24 152
Nov 25 171

Values in µg/m³, limit 125 µg/m³.

Months of 2024

Month	Days above 125	Hours above 350	Average	Highest day	No readings
January	5 above the number allowed	1	75	184	0
February	0	0	48	101	0
March	0	0	28	46	0
April	0	0	17	29	0
May	0	0	8	12	0
June	0	0	8	23	0
July	0	0	10	17	0
August	0	0	13	27	0
September	0	0	12	21	0
October	0	1	too few	92	10
November	2 above the number allowed	3	57	171	2
December	0	0	too few	98	0

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.

There are no readings for this period.

Last 7 days, every hour: SO₂ in µg/m³

no data from the station

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

Values as a table

Day	µg/m³	Note
Wed, 10/7		no data from the station
Tue, 10/6		no data from the station
Mon, 10/5		no data from the station
Sun, 10/4		no data from the station
Sat, 10/3		no data from the station
Fri, 10/2		no data from the station
Thu, 10/1		no data from the station
Wed, 9/30		no data from the station
Tue, 9/29		no data from the station
Mon, 9/28		no data from the station
Sun, 9/27		no data from the station
Sat, 9/26		no data from the station
Fri, 9/25		no data from the station
Thu, 9/24		no data from the station
Wed, 9/23		no data from the station
Tue, 9/22		no data from the station
Mon, 9/21		no data from the station
Sun, 9/20		no data from the station
Sat, 9/19		no data from the station
Fri, 9/18		no data from the station
Thu, 9/17		no data from the station
Wed, 9/16		no data from the station
Tue, 9/15		no data from the station
Mon, 9/14		no data from the station
Sun, 9/13		no data from the station
Sat, 9/12		no data from the station
Fri, 9/11		no data from the station
Thu, 9/10		no data from the station
Wed, 9/9		no data from the station
Tue, 9/8		no data from the station

Last 12 monthsa year earlierlegal annual limit, 50 µg/m³month with days without data from the station

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		7 days without data from the station
September 2026	too few readings		30 days without data from the station
August 2026	too few readings		25 days without data from the station
July 2026	too few readings		1 day without data from the station
June 2026	too few readings		measured in 45 % of hours · provisional · 12 days without data from the station
May 2026	18.4		measured in 94 % of hours · provisional
April 2026	24.8		measured in 79 % of hours · provisional · 4 days without data from the station
March 2026	38.4		measured in 100 % of hours · provisional
February 2026	57.2		measured in 100 % of hours · provisional
January 2026	112.8		measured in 88 % of hours · provisional · 2 days without data from the station
December 2025	too few readings	too few readings	31 days without data from the station
November 2025	too few readings	56.8	30 days without data from the station

SO₂ by year

Yardstick: legal limits in the Federation of BiH (Pravilnik, Official Gazette FBiH 1/12, 50/19, 3/21)

Measure	2026*	2024
Days above 125 µg/m³ (allowed 3)	≥ 8 above the number allowed	7 above the number allowed
Hours above 350 µg/m³ (allowed 24)	≥ 18²	5
Hours above 500 µg/m³, three hours in a row (alert threshold)	0	0
Annual average, µg/m³ (legal limit 50)	too few	27.5
Highest daily average, µg/m³	291January 23	184January 24
Highest hourly value, µg/m³	629February 3	576November 17
Hours measured	55 %	93 %
Days without any reading from the station	81	12

* 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.

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

Compared with the new EU rules and the WHO recommendation

EU from 2030: daily 50 µg/m³, 18 days allowed. In 2024 there were 49 such days.
WHO 2021: daily 40 µg/m³, at most three to four days a year. In 2024 there were 62 such days.
EU from 2030: annual average 20 µg/m³. Average in 2024: 28 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
Jan 24, 2024	184	1.5 ×
Nov 25, 2024	171	1.4 ×
Jan 23, 2024	170	1.4 ×
Nov 24, 2024	152	1.2 ×
Jan 22, 2024	138	1.1 ×

Daily average in µg/m³, daily limit 125 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: 91

10 outages, 2,185 hours in total in the last 12 months.

Timeline of outages from October 8, 2025 to today

Grey: for 2025 the archive has no hour from this station, because the EEA's verified annual delivery does not include it. We do not count this as an outage.

From	To	Duration
Aug 6, 2026 13:00	still ongoing	62 days
Jul 5, 2026 06:00	Jul 6, 2026 06:00	24 hours
Jun 29, 2026 13:00	Jul 2, 2026 09:00	3 days
Jun 17, 2026 10:00	Jun 28, 2026 13:00	11 days
Jun 9, 2026 05:00	Jun 11, 2026 11:00	2 days
May 23, 2026 01:00	May 24, 2026 08:00	31 hours
Apr 10, 2026 04:00	Apr 13, 2026 11:00	3 days
Apr 4, 2026 12:00	Apr 7, 2026 09:00	3 days
Jan 26, 2026 15:00	Jan 28, 2026 14:00	47 hours
Jan 9, 2026 14:00	Jan 11, 2026 11:00	45 hours

Calculated from the hourly values the EEA publishes. If late values arrive afterwards, an outage gets shorter or disappears.

Who is responsible

Air quality in the Federation of BiH is monitored by three networks of stations: the federal, the cantonal and the municipal one (Air Protection Act, Official Gazette FBiH 72/24, Art. 12 to 16).

Federal Hydrometeorological Institute (FHMZ): Runs the federal network, collects the data of all networks and publishes it. It issues a report every month and, every year by 31 July, the annual air quality report (Art. 14, 19 and 63).
Canton: Sets up the cantonal network and is responsible for the measures. When limit values are exceeded, it adopts an air quality plan. When warning or alert thresholds are at risk of being exceeded, it adopts a short-term intervention plan. When the information threshold or a concentration dangerous to health is exceeded, it informs the public (Art. 15, 22, 25, 27 and 61).
Municipality: May run its own stations with the consent of the canton and must publish their results (Art. 16 and 17).
Inspectorates: The inspectorates of the Federation, the canton and the municipality supervise the law and the measures, each within its remit (Art. 71).

What the law requires when a limit is exceeded

A limit value is not a recommendation. The deadline for meeting the limit values for sulphur dioxide, nitrogen dioxide and particulate matter expired on 1 January 2021. Since then only the number of exceedances that the Pravilnik allows applies (Official Gazette FBiH 1/12, Annex X). The Air Protection Act adds that limit values, once met, must not be exceeded again (Art. 5(4)).

The law allows: for PM10 at most 35 days a year above 50 µg/m³, for sulphur dioxide at most 24 hours above 350 µg/m³ and at most 3 days above 125 µg/m³, for nitrogen dioxide at most 18 hours above 200 µg/m³ and no day with a daily average above 85 µg/m³ (Annex X).

When limits are exceeded, the canton adopts an air quality plan with measures that shorten the period of exceedance. The plan is published within eight days of adoption (Art. 8, 25, 26 and 63).

The alert thresholds are 500 µg/m³ for sulphur dioxide and 400 µg/m³ for nitrogen dioxide over three hours in a row, and 300 µg/m³ for PM10 and 280 µg/m³ for PM2.5 as a daily average (Pravilnik, Annex XIV, amended in Official Gazette FBiH 3/21). When such a situation threatens, the canton must have a short-term intervention plan. It can restrict traffic, construction work, the operation of plants and heating (Art. 27 and 28).

When the information threshold or a concentration dangerous to health is exceeded, the competent cantonal authorities inform the public through radio, television, newspapers and the internet: where, since when, how much was measured, what is expected and how to protect oneself (Art. 61 and 62).

The limit values in BiH match the EU rules of 2008. Since 2021 the World Health Organization has recommended much lower values, for PM10 45 µg/m³ a day and 15 µg/m³ a year. From 2030 the EU lowers the annual PM10 limit to 20 µg/m³ (Directive (EU) 2024/2881).

We checked the rules against the published texts on 7 October 2026.

Where the data comes from

Measured by Federal Hydrometeorological Institute. 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 limits are the legal limits of the Federation of BiH (Pravilnik, Official Gazette FBiH 1/12, 50/19 and 3/21, Annexes X and XIV). They match EU Directive 2008/50/EC. 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

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, Travnik station, https://samoeko.com/en/luft/stanica/BA0062A, accessed 8 October 2026. Readings: official stations, via the European Environment Agency (EEA). The level is calculated by samoEKO.

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