Air at the Tuzla Trnovac station
Tuzla, Tuzla Canton · Federation of Bosnia and Herzegovina
Network: Federal Hydrometeorological Institute · Station code: BA0068A
This year, up to yesterday (October 6)
at least
17 days
with a daily average of particulate matter PM10 above the legal limit of 50 µg/m³.
Readings are missing for part of the period, so the real number may be higher.
In 2025: 59 days above the limit, 35 allowed.
Worst day: March 1, 2026, PM10 63 µg/m³ as a daily average, 1.3 times the limit.
Daily average for 153 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 20:00
Latest values
Latest value: 20:00
| Pollutant | Value | Level |
|---|---|---|
| PM10 | 44.1 µg/m³ | Fair |
How the air is changing
Over the last seven days there was more PM10 in the air than the week before.
- PM10: average 22.2 µg/m³, week before 17.4 µg/m³
There are not enough readings to compare with the month before.
- PM10: too few readings to compare
Particulate matter PM10
44.1
Nowµg/m³
Measured at 20:00
33.9
Last 24 hoursµg/m³
measured in 92 % of hours · provisional
22.2
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 67 % of hours · provisional
Days in 2026: PM10, daily average above 50 µg/m³
17 days above the limit. 113 days without any reading from the station.
- above the limit
- below the limit
- too few readings for the day
- no data from the station
Days above the limit with values (17)
- Feb 7 55
- Feb 22 62
- Feb 27 60
- Feb 28 55
- Mar 1 63
- Mar 4 57
- Mar 6 54
- Mar 7 51
- Mar 8 55
- Mar 10 54
- Mar 11 75
- Mar 12 75
- Mar 13 75
- Mar 14 75
- Mar 15 75
- Aug 28 54
- Aug 29 58
Values in µg/m³, limit 50 µg/m³.
Months of 2026
| Month | Days above 50 | Highest day | No readings |
|---|---|---|---|
| January | 31 | ||
| February | 4 above the number allowed | 62 | 5 |
| March | 11 above the number allowed | 63 | 15 |
| April | 30 | ||
| May | 0 | 22 | 11 |
| June | 0 | 39 | 1 |
| July | 0 | 26 | 0 |
| August | 2 above the number allowed | 58 | 0 |
| September | 0 | 25 | 20 |
| October up to yesterday | 0 | 32 | 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 | ||
| 21:00 | 69 | model estimate, not counted |
| 20:00 | 44.1 | |
| 19:00 | 64.6 | |
| 18:00 | 23.1 | |
| 17:00 | 22.8 | |
| 16:00 | 25.9 | |
| 15:00 | 21.9 | |
| 14:00 | 17.3 | |
| 13:00 | 36.4 | |
| 12:00 | 69.7 | |
| 11:00 | 51.9 | |
| 10:00 | 53.1 | |
| 09:00 | 37.9 | |
| 08:00 | 30 | |
| 07:00 | 25.6 | |
| 06:00 | 25.1 | |
| 05:00 | 23.2 | |
| 04:00 | 23.2 | |
| 03:00 | 23 | |
| 02:00 | 25.3 | |
| 01:00 | 29.7 | |
| Tuesday, 10/6 | ||
| 00:00 | 34 | |
| 23:00 | 38.7 | |
| 22:00 | 42.3 | |
| 21:00 | 48.5 | |
| 20:00 | 46.1 | |
| 19:00 | 38.1 | |
| 18:00 | 28.2 | |
| 17:00 | 22.8 | |
| 16:00 | 19.9 | |
| 15:00 | 16.9 | |
| 14:00 | 24.4 | |
| 13:00 | 41.8 | |
| 12:00 | 47.3 | |
| 11:00 | 52.9 | |
| 10:00 | 47.5 | |
| 09:00 | 36.8 | |
| 08:00 | 28.1 | |
| 07:00 | 31 | |
| 06:00 | 20.1 | |
| 05:00 | 18.4 | |
| 04:00 | 19.6 | |
| 03:00 | 21.1 | |
| 02:00 | 25.5 | |
| 01:00 | 27 | |
| Monday, 10/5 | ||
| 00:00 | 34.7 | |
| 23:00 | 39.1 | |
| 22:00 | 35.8 | |
| 21:00 | 31.5 | |
| 20:00 | 34.8 | |
| 19:00 | 58.6 | |
| 18:00 | 18.5 | |
| 17:00 | 27.2 | |
| 16:00 | 23 | |
| 15:00 | 25.7 | |
| 14:00 | 26 | |
| 13:00 | 21.6 | |
| 12:00 | 34.5 | |
| 11:00 | 32.1 | |
| 10:00 | 38.5 | |
| 09:00 | 31.3 | |
| 08:00 | 18.3 | |
| 07:00 | 15.2 | |
| 06:00 | 13.6 | |
| 05:00 | 14.1 | |
| 04:00 | 15 | |
| 03:00 | 16.4 | |
| 02:00 | 20.2 | |
| 01:00 | 22 | |
| Sunday, 10/4 | ||
| 00:00 | 26.1 | |
| 23:00 | 31.7 | |
| 22:00 | 30.2 | |
| 21:00 | 30.5 | |
| 20:00 | 33.8 | |
| 19:00 | 23 | |
| 18:00 | 15.5 | |
| 17:00 | 17.4 | |
| 16:00 | 16.9 | |
| 15:00 | 17 | |
| 14:00 | 22.2 | |
| 13:00 | 26.9 | |
| 12:00 | 24 | |
| 11:00 | 22.3 | |
| 10:00 | 22.9 | |
| 09:00 | 18.1 | |
| 08:00 | 14.9 | |
| 07:00 | 17.5 | |
| 06:00 | 12.4 | |
| 05:00 | 12.9 | |
| 04:00 | 15.1 | |
| 03:00 | 19.3 | |
| 02:00 | 17.1 | |
| 01:00 | 23.8 | |
| Saturday, 10/3 | ||
| 00:00 | 24.9 | |
| 23:00 | 24.7 | |
| 22:00 | 30 | |
| 21:00 | 35.1 | |
| 20:00 | 27.6 | |
| 19:00 | 23.3 | |
| 18:00 | 15.9 | |
| 17:00 | 20.8 | |
| 16:00 | 14.1 | |
| 15:00 | 16.6 | |
| 14:00 | 13 | |
| 13:00 | 12.4 | |
| 12:00 | 19.7 | |
| 11:00 | 35.4 | |
| 10:00 | 26.9 | |
| 09:00 | 19.9 | |
| 08:00 | 15.9 | |
| 07:00 | 11.6 | |
| 06:00 | 12.9 | |
| 05:00 | 13 | |
| 04:00 | 13.5 | |
| 03:00 | 13.8 | |
| 02:00 | 17.4 | |
| 01:00 | 21.8 | |
| Friday, 10/2 | ||
| 00:00 | 24.6 | |
| 23:00 | 27.1 | |
| 22:00 | 33.5 | |
| 21:00 | 34.9 | |
| 20:00 | 26.3 | |
| 19:00 | 19.8 | |
| 18:00 | 16.8 | |
| 17:00 | 14.6 | |
| 16:00 | 11.7 | |
| 15:00 | 10.2 | |
| 14:00 | 15.4 | |
| 13:00 | 18.6 | |
| 12:00 | 31.7 | |
| 11:00 | 27.8 | |
| 10:00 | 39.1 | |
| 09:00 | 24.3 | |
| 08:00 | 16.3 | |
| 07:00 | 10.6 | |
| 06:00 | 9.9 | |
| 05:00 | 9.4 | |
| 04:00 | 10.7 | |
| 03:00 | 10.1 | |
| 02:00 | 11.9 | |
| 01:00 | 14.1 | |
| Thursday, 10/1 | ||
| 00:00 | 18.9 | |
| 23:00 | 19.8 | |
| 22:00 | 20 | |
| 21:00 | 18.3 | |
| 20:00 | 18.7 | |
| 19:00 | 18.1 | |
| 18:00 | 15.1 | |
| 17:00 | 15.1 | |
| 16:00 | 14.3 | |
| 15:00 | 13.2 | |
| 14:00 | 12.2 | |
| 13:00 | 12.1 | |
| 12:00 | 11.7 | |
| 11:00 | 14 | |
| 10:00 | 27.1 | |
| 09:00 | 29.9 | |
| 08:00 | 19 | |
| 07:00 | 13.8 | |
| 06:00 | 14.7 | |
| 05:00 | 13 | |
| 04:00 | 16.1 | |
| 03:00 | 14.4 | |
| 02:00 | 15.5 | |
| 01:00 | 16 | |
| Wednesday, 9/30 | ||
| 00:00 | 17.9 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 32.4 | provisional |
| Mon, 10/5 | 27 | provisional |
| Sun, 10/4 | 21.3 | provisional |
| Sat, 10/3 | 20 | provisional |
| Fri, 10/2 | 19.6 | provisional |
| Thu, 10/1 | 16.7 | provisional |
| Wed, 9/30 | 18.7 | provisional |
| Tue, 9/29 | 18.8 | provisional |
| Mon, 9/28 | 17.6 | provisional |
| Sun, 9/27 | 25.1 | provisional |
| Sat, 9/26 | 21.9 | provisional |
| Fri, 9/25 | 12.8 | provisional |
| Thu, 9/24 | 11.2 | provisional |
| Wed, 9/23 | 14.6 | 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 | 22.8 | 29 | measured in 100 % of hours · provisional · year before: same days |
| September 2026 | too few readings | 30.3 | measured in 30 % of hours · provisional · 20 days without data from the station |
| August 2026 | 22.9 | 33.2 | measured in 97 % of hours · provisional |
| July 2026 | 15.6 | 33.4 | measured in 95 % of hours · provisional |
| June 2026 | 17.5 | 30.2 | measured in 93 % of hours · provisional · 1 day without data from the station |
| May 2026 | too few readings | 27 | measured in 58 % of hours · provisional · 11 days without data from the station |
| April 2026 | too few readings | 30.6 | 30 days without data from the station |
| March 2026 | too few readings | 40.8 | measured in 50 % of hours · provisional · 15 days without data from the station |
| February 2026 | 37.9 | 56.3 | measured in 82 % of hours · provisional · 5 days without data from the station |
| January 2026 | too few readings | 50.8 | 31 days without data from the station |
| December 2025 | 59.5 | measured in 98 % of hours · verified | |
| November 2025 | 28.9 | measured in 100 % of hours · verified |
PM10 by year
Yardstick: legal limits in the Federation of BiH (Pravilnik, Official Gazette FBiH 1/12, 50/19, 3/21)
| Measure | 2026* | 2025 |
|---|---|---|
| Days above 50 µg/m³ (allowed 35) | ≥ 17² | 59 above the number allowed |
| Days above 150 µg/m³ (warning threshold FBiH) | 0 | 1 above the number allowed |
| Days above 300 µg/m³ (alert threshold FBiH) | 0 | 0 |
| Annual average, µg/m³ (legal limit 40) | too few | 37.4 |
| Highest daily average, µg/m³ | 63March 1 | 158December 29 |
| Highest hourly value, µg/m³ | 144February 27 | 268December 29 |
| Hours measured | 57 % | 100 % |
| Days without any reading from the station | 113 | 0 |
* 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.
We do not take the highest values from days on which the same unverified value repeats for hours. Those days are still counted.
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 21 such days.
- WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2026 there were 21 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 2026
| Day | Average | Times the limit |
|---|---|---|
| Mar 1, 2026provisional | 63 | 1.3 × |
| Feb 22, 2026provisional | 62 | 1.2 × |
| Feb 27, 2026provisional | 60 | 1.2 × |
| Aug 29, 2026provisional | 58 | 1.2 × |
| Mar 4, 2026provisional | 57 | 1.1 × |
Daily average in µg/m³, daily limit 50 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: 119
6 outages, 2,851 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 |
| Jul 1, 2026 09:00 | Jul 2, 2026 09:00 | 24 hours |
| Jun 9, 2026 05:00 | Jun 11, 2026 11:00 | 2 days |
| May 23, 2026 01:00 | May 24, 2026 08:00 | 31 hours |
| Mar 16, 2026 11:00 | May 12, 2026 18:00 | 57 days |
| Jan 1, 2026 00:00 | Feb 6, 2026 00:00 | 36 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 Tuzla
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