Air at the Mostar Kampus station
Mostar, Herzegovina-Neretva Canton · Federation of Bosnia and Herzegovina
Network: Federal Hydrometeorological Institute · Station code: BA0072A
This year, up to yesterday (October 6)
No exceedance on the measured days. 14 of 279 days were measured.
Daily average for 14 of 279 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)
Fair
Air now · Measured at 18:00
Latest values
Latest value: 18:00
| Pollutant | Value | Level |
|---|---|---|
| PM10 | 27.9 µg/m³ | Fair |
How the air is changing
Over the last seven days there was more PM10 and PM2.5 in the air than the week before.
- PM10: average 20.4 µg/m³, week before 9.6 µg/m³
- PM2.5: average 11.3 µg/m³, week before 5.6 µg/m³
There are not enough readings to compare with the month before.
- PM10: too few readings to compare
- PM2.5: too few readings to compare
Show
Particulate matter PM10
27.9
Nowµg/m³
Measured at 18:00
27.7
Last 24 hoursµg/m³
measured in 92 % of hours · provisional
20.4
Last 7 daysµg/m³
measured in 100 % of hours · provisional
too few readings
Last 30 days
measured in 49 % of hours · provisional
too few readings
Last 12 months
measured in 4 % of hours · provisional
Days in 2026: PM10, daily average above 50 µg/m³
No measured day above the limit. 20 days without any reading from the station.
- above the limit
- below the limit
- too few readings for the day
- no data from the station
Months of 2026
| Month | Days above 50 | Highest day | No readings |
|---|---|---|---|
| January | |||
| February | |||
| March | |||
| April | |||
| May | |||
| June | |||
| July | |||
| August | 0 | 0 | |
| September | 0 | 19 | 20 |
| October up to yesterday | 0 | 30 | 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.
Values as a table
| Hour to | µg/m³ | Note |
|---|---|---|
| Wednesday, 10/7 | ||
| 19:00 | 22 | model estimate, not counted |
| 18:00 | 27.9 | |
| 17:00 | 20.3 | |
| 16:00 | 14.5 | |
| 15:00 | 16.3 | |
| 14:00 | 16.9 | |
| 13:00 | 18.7 | |
| 12:00 | 30.1 | |
| 11:00 | 30.4 | |
| 10:00 | 43.8 | |
| 09:00 | 40.5 | |
| 08:00 | 27.9 | |
| 07:00 | 22.2 | |
| 06:00 | 22.4 | |
| 05:00 | 23 | |
| 04:00 | 24.1 | |
| 03:00 | 27.3 | |
| 02:00 | 28.5 | |
| 01:00 | 32.3 | |
| Tuesday, 10/6 | ||
| 00:00 | 28 | |
| 23:00 | 28.2 | |
| 22:00 | 34.8 | |
| 21:00 | 51.3 | |
| 20:00 | 39.1 | |
| 19:00 | 23.3 | |
| 18:00 | 20.2 | |
| 17:00 | 19.7 | |
| 16:00 | 20.6 | |
| 15:00 | 25.5 | |
| 14:00 | 33.7 | |
| 13:00 | 33.6 | |
| 12:00 | 30.2 | |
| 11:00 | 31.2 | |
| 10:00 | 38.5 | |
| 09:00 | 40 | |
| 08:00 | 28.3 | |
| 07:00 | 21.8 | |
| 06:00 | 22.4 | |
| 05:00 | 24.7 | |
| 04:00 | 28.1 | |
| 03:00 | 29.8 | |
| 02:00 | 32.2 | |
| 01:00 | 34.3 | |
| Monday, 10/5 | ||
| 00:00 | 32.2 | |
| 23:00 | 32.2 | |
| 22:00 | 41.6 | |
| 21:00 | 48 | |
| 20:00 | 40.1 | |
| 19:00 | 31.1 | |
| 18:00 | 38.1 | |
| 17:00 | 24.1 | |
| 16:00 | 20.5 | |
| 15:00 | 24.5 | |
| 14:00 | 25.7 | |
| 13:00 | 19.9 | |
| 12:00 | 15.4 | |
| 11:00 | 18.4 | |
| 10:00 | 20.2 | |
| 09:00 | 39.7 | |
| 08:00 | 16.6 | |
| 07:00 | 12.5 | |
| 06:00 | 15.8 | |
| 05:00 | 18.2 | |
| 04:00 | 22.6 | |
| 03:00 | 23.5 | |
| 02:00 | 29.3 | |
| 01:00 | 29.5 | |
| Sunday, 10/4 | ||
| 00:00 | 31.9 | |
| 23:00 | 29.9 | |
| 22:00 | 37.8 | |
| 21:00 | 39.4 | |
| 20:00 | 32.7 | |
| 19:00 | 42.6 | |
| 18:00 | 37.7 | |
| 17:00 | 16.7 | |
| 16:00 | 10.2 | |
| 15:00 | 11.5 | |
| 14:00 | 10.3 | |
| 13:00 | 10.1 | |
| 12:00 | 9.4 | |
| 11:00 | 9.5 | |
| 10:00 | 11.9 | |
| 09:00 | 11.8 | |
| 08:00 | 12 | |
| 07:00 | 12.5 | |
| 06:00 | 11.3 | |
| 05:00 | 10.5 | |
| 04:00 | 12 | |
| 03:00 | 17.9 | |
| 02:00 | 22.4 | |
| 01:00 | 28.8 | |
| Saturday, 10/3 | ||
| 00:00 | 27.4 | |
| 23:00 | 40.4 | |
| 22:00 | 34.2 | |
| 21:00 | 35.2 | |
| 20:00 | 22.4 | |
| 19:00 | 19.1 | |
| 18:00 | 17.3 | |
| 17:00 | 11.3 | |
| 16:00 | 7.8 | |
| 15:00 | 15.3 | |
| 14:00 | 10.6 | |
| 13:00 | 8.7 | |
| 12:00 | 20.8 | |
| 11:00 | 19.7 | |
| 10:00 | 17.8 | |
| 09:00 | 14.2 | |
| 08:00 | 12.7 | |
| 07:00 | 11.2 | |
| 06:00 | 10.2 | |
| 05:00 | 10.2 | |
| 04:00 | 10.9 | |
| 03:00 | 9.8 | |
| 02:00 | 11.8 | |
| 01:00 | 17.1 | |
| Friday, 10/2 | ||
| 00:00 | 29.1 | |
| 23:00 | 11.3 | |
| 22:00 | 14.8 | |
| 21:00 | 14.8 | |
| 20:00 | 15.7 | |
| 19:00 | 10.1 | |
| 18:00 | 8.3 | |
| 17:00 | 8.2 | |
| 16:00 | 17.5 | |
| 15:00 | 12.5 | |
| 14:00 | 17.3 | |
| 13:00 | 16.5 | |
| 12:00 | 15.4 | |
| 11:00 | 17.8 | |
| 10:00 | 28.1 | |
| 09:00 | 20.3 | |
| 08:00 | 15.1 | |
| 07:00 | 11.5 | |
| 06:00 | 11.1 | |
| 05:00 | 9.9 | |
| 04:00 | 9.4 | |
| 03:00 | 10.1 | |
| 02:00 | 10 | |
| 01:00 | 10.9 | |
| Thursday, 10/1 | ||
| 00:00 | 9.8 | |
| 23:00 | 11.1 | |
| 22:00 | 15 | |
| 21:00 | 12.9 | |
| 20:00 | 13.5 | |
| 19:00 | 14.3 | |
| 18:00 | 10.6 | |
| 17:00 | 10 | |
| 16:00 | 13.5 | |
| 15:00 | 12.2 | |
| 14:00 | 23.9 | |
| 13:00 | 16 | |
| 12:00 | 28.7 | |
| 11:00 | 19.1 | |
| 10:00 | 19.5 | |
| 09:00 | 24.3 | |
| 08:00 | 18.1 | |
| 07:00 | 14.3 | |
| 06:00 | 15.2 | |
| 05:00 | 18.8 | |
| 04:00 | 14.1 | |
| 03:00 | 12.6 | |
| 02:00 | 12.2 | |
| 01:00 | 13.3 | |
| Wednesday, 9/30 | ||
| 00:00 | 26.9 | |
| 23:00 | 36.4 | |
| 22:00 | 35.3 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 30 | provisional |
| Mon, 10/5 | 26.7 | provisional |
| Sun, 10/4 | 20 | provisional |
| Sat, 10/3 | 17.3 | provisional |
| Fri, 10/2 | 14.4 | provisional |
| Thu, 10/1 | 15.5 | provisional |
| Wed, 9/30 | 18.6 | provisional |
| Tue, 9/29 | 13 | provisional |
| Mon, 9/28 | 11.7 | provisional |
| Sun, 9/27 | 9.5 | provisional |
| Sat, 9/26 | 9.9 | provisional |
| Fri, 9/25 | 6.7 | provisional |
| Thu, 9/24 | 10.3 | provisional |
| Wed, 9/23 | 6.6 | provisional |
| Tue, 9/22 | too few readings | |
| 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 | |
| Mon, 9/7 | no data from the station |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 20.7 | measured in 100 % of hours · provisional | |
| September 2026 | too few readings | measured in 30 % of hours · provisional · 20 days without data from the station | |
| August 2026 | too few readings | measured in 2 % of hours · provisional | |
| July 2026 | too few readings | ||
| June 2026 | too few readings | ||
| May 2026 | too few readings | ||
| April 2026 | too few readings | ||
| March 2026 | too few readings | ||
| February 2026 | too few readings | ||
| January 2026 | too few readings | ||
| December 2025 | too few readings | ||
| November 2025 | too few readings |
PM10 by year
Yardstick: legal limits in the Federation of BiH (Pravilnik, Official Gazette FBiH 1/12, 50/19, 3/21)
| Measure | 2026* |
|---|---|
| Days above 50 µg/m³ (allowed 35) | 0² |
| Days above 150 µg/m³ (warning threshold FBiH) | 0 |
| Days above 300 µg/m³ (alert threshold FBiH) | 0 |
| Annual average, µg/m³ (legal limit 40) | too few |
| Highest daily average, µg/m³ | 30October 6 |
| Highest hourly value, µg/m³ | 75August 31 |
| Hours measured | 6 % |
| Days without any reading from the station | 20 |
* 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.
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 2026 there were 0 such days.
- WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2026 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.
Particulate matter PM2.5
no measurement
Now
too few readings
Last 24 hours
measured in 13 % of hours · provisional
11.3
Last 7 daysµg/m³
measured in 99 % of hours · provisional
too few readings
Last 30 days
measured in 49 % of hours · provisional
too few readings
Last 12 months
measured in 4 % of hours · provisional
Months of 2026
| Month | Highest day | No readings |
|---|---|---|
| January | ||
| February | ||
| March | ||
| April | ||
| May | ||
| June | ||
| July | ||
| August | 0 | |
| September | 10 | 20 |
| October up to yesterday | 19 | 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.
Values as a table
| Hour to | µg/m³ | Note |
|---|---|---|
| Tuesday, 10/6 | ||
| 23:00 | 16.8 | |
| 22:00 | 19.1 | |
| 21:00 | 27.1 | |
| 20:00 | 20.4 | |
| 19:00 | 12.4 | |
| 18:00 | 11.1 | |
| 17:00 | 10.7 | |
| 16:00 | 11.6 | |
| 15:00 | 13.5 | |
| 14:00 | 18.9 | |
| 13:00 | 21 | |
| 12:00 | 20.3 | |
| 11:00 | 21.1 | |
| 10:00 | 24.4 | |
| 09:00 | 20.9 | |
| 08:00 | 18.3 | |
| 07:00 | 17.1 | |
| 06:00 | 18.1 | |
| 05:00 | 20.1 | |
| 04:00 | 22.1 | |
| 03:00 | 23.3 | |
| 02:00 | 24.6 | |
| 01:00 | 25.7 | |
| Monday, 10/5 | ||
| 00:00 | 24.3 | |
| 23:00 | 23.3 | |
| 22:00 | 24.6 | |
| 21:00 | 26.2 | |
| 20:00 | 24.9 | |
| 19:00 | 20.3 | |
| 18:00 | 24.8 | |
| 17:00 | 14.8 | |
| 16:00 | 11.7 | |
| 15:00 | 12.4 | |
| 14:00 | 12.2 | |
| 13:00 | 11.1 | |
| 12:00 | 9.7 | |
| 11:00 | 10.9 | |
| 10:00 | 11.1 | |
| 09:00 | 13.7 | |
| 08:00 | 10 | |
| 07:00 | 8.9 | |
| 06:00 | 10.7 | |
| 05:00 | 13.7 | |
| 04:00 | 18 | |
| 03:00 | 19.1 | |
| 02:00 | 22.9 | |
| 01:00 | 23.9 | |
| Sunday, 10/4 | ||
| 00:00 | 25.4 | |
| 23:00 | 23.8 | |
| 22:00 | 27.6 | |
| 21:00 | 29 | |
| 20:00 | 23.2 | |
| 19:00 | 34.4 | |
| 18:00 | 28.8 | |
| 17:00 | 9.7 | |
| 16:00 | 5.4 | |
| 15:00 | 6 | |
| 14:00 | 6.1 | |
| 13:00 | 5.2 | |
| 12:00 | 5.3 | |
| 11:00 | 5.5 | |
| 10:00 | 5.8 | |
| 09:00 | 6.3 | |
| 08:00 | 6.6 | |
| 07:00 | 6.8 | |
| 06:00 | 7 | |
| 05:00 | 6.8 | |
| 04:00 | 6.9 | |
| 03:00 | 10.3 | |
| 02:00 | 12.5 | |
| 01:00 | 14.6 | |
| Saturday, 10/3 | ||
| 00:00 | 14.1 | |
| 23:00 | 18.7 | |
| 22:00 | 18.7 | |
| 21:00 | 16.7 | |
| 20:00 | 10.4 | |
| 19:00 | 7.7 | |
| 18:00 | 7.2 | |
| 17:00 | 7.6 | |
| 16:00 | 3.8 | |
| 15:00 | 4.9 | |
| 14:00 | 4.4 | |
| 13:00 | 4.6 | |
| 12:00 | 6.5 | |
| 11:00 | 7 | |
| 10:00 | 6.9 | |
| 09:00 | 6.6 | |
| 08:00 | 6.7 | |
| 07:00 | 6.1 | |
| 06:00 | 5.7 | |
| 05:00 | 5.4 | |
| 04:00 | 5 | |
| 03:00 | 4.5 | |
| 02:00 | 4.8 | |
| 01:00 | 5.5 | |
| Friday, 10/2 | ||
| 00:00 | 6.9 | |
| 23:00 | 4.6 | |
| 22:00 | 5.3 | |
| 21:00 | 6.2 | |
| 20:00 | 6.3 | |
| 19:00 | 3.9 | |
| 18:00 | 3.4 | |
| 17:00 | 2.5 | |
| 16:00 | 3.1 | |
| 15:00 | 3 | |
| 14:00 | 4.6 | |
| 13:00 | 5.3 | |
| 12:00 | 5.6 | |
| 11:00 | 6.2 | |
| 10:00 | 7.6 | |
| 09:00 | 7.2 | |
| 08:00 | 6.8 | |
| 07:00 | 6.3 | |
| 06:00 | 6.1 | |
| 05:00 | 6.1 | |
| 04:00 | 6 | |
| 03:00 | 6 | |
| 02:00 | 5.6 | |
| 01:00 | 5.8 | |
| Thursday, 10/1 | ||
| 00:00 | 5.8 | |
| 23:00 | 5.9 | |
| 22:00 | 6.8 | |
| 21:00 | 6.8 | |
| 20:00 | 6.7 | |
| 19:00 | 6 | |
| 18:00 | 5.1 | |
| 17:00 | 4.5 | |
| 16:00 | 5.2 | |
| 15:00 | 5.3 | |
| 14:00 | 6.4 | |
| 13:00 | 6.3 | |
| 12:00 | 7.6 | |
| 11:00 | 8.2 | |
| 10:00 | 9.3 | |
| 09:00 | 10.8 | |
| 08:00 | 10.2 | |
| 07:00 | 9.6 | |
| 06:00 | 9.8 | |
| 05:00 | 11.9 | |
| 04:00 | 8.8 | |
| 03:00 | 8.4 | |
| 02:00 | 8.1 | |
| 01:00 | 8.9 | |
| Wednesday, 9/30 | ||
| 00:00 | 14.6 | |
| 23:00 | 19.7 | |
| 22:00 | 17.4 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 19.1 | provisional |
| Mon, 10/5 | 16.8 | provisional |
| Sun, 10/4 | 13.3 | provisional |
| Sat, 10/3 | 7.9 | provisional |
| Fri, 10/2 | 5.4 | provisional |
| Thu, 10/1 | 7.6 | provisional |
| Wed, 9/30 | 9.6 | provisional |
| Tue, 9/29 | 7.2 | provisional |
| Mon, 9/28 | 7 | provisional |
| Sun, 9/27 | 6.1 | provisional |
| Sat, 9/26 | 7.8 | provisional |
| Fri, 9/25 | 4.5 | provisional |
| Thu, 9/24 | 4 | provisional |
| Wed, 9/23 | 2.7 | provisional |
| Tue, 9/22 | too few readings | |
| 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 | |
| Mon, 9/7 | no data from the station |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 11.6 | measured in 99 % of hours · provisional | |
| September 2026 | too few readings | measured in 30 % of hours · provisional · 20 days without data from the station | |
| August 2026 | too few readings | measured in 2 % of hours · provisional | |
| July 2026 | too few readings | ||
| June 2026 | too few readings | ||
| May 2026 | too few readings | ||
| April 2026 | too few readings | ||
| March 2026 | too few readings | ||
| February 2026 | too few readings | ||
| January 2026 | too few readings | ||
| December 2025 | too few readings | ||
| November 2025 | too few readings |
PM2.5 by year
Yardstick: legal limits in the Federation of BiH (Pravilnik, Official Gazette FBiH 1/12, 50/19, 3/21)
| Measure | 2026* |
|---|---|
| Days above 140 µg/m³ (warning threshold FBiH) | 0 |
| Days above 280 µg/m³ (alert threshold FBiH) | 0 |
| Annual average, µg/m³ (legal limit 25) | too few |
| Highest daily average, µg/m³ | 19October 6 |
| Highest hourly value, µg/m³ | 34October 4 |
| Hours measured | 6 % |
| Days without any reading from the station | 20 |
* 2026 up to October 6; the average since the start of the year is not yet an annual average.
The monitoring networks have not yet finally verified this year’s data. The EEA publishes verified values once a year.
Unverified hourly values of particulate matter from 975 µg/m³ up, and single spikes from 500 µg/m³ up between low values, count as missing. In the verified data for BiH from 2023 to 2025 no hour was above 600 µg/m³.
■ and a figure in red: more than is allowed for the whole year.
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 25 µg/m³, 18 days allowed. In 2026 there were 0 such days.
- WHO 2021: daily 15 µg/m³, at most three to four days a year. In 2026 there were 2 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: 21
1 outage, 504 hours in total in the last 12 months.
Timeline of outages from October 7, 2025 to today
| From | To | Duration |
|---|---|---|
| Sep 1, 2026 09:00 | Sep 22, 2026 09:00 | 21 days |
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).
We show measured values only. Whether an episode has been declared is decided by the competent authorities, who publish it on their own pages.
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.
Other stations in Mostar
samoEKO is a brand of samoLabs, Juelich.