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Air at the Kakanj Centar (66A) station

Kakanj, Zenica-Doboj Canton · Federation of Bosnia and Herzegovina

Network: Federal Hydrometeorological Institute · Station code: BA0066A

This year, up to the last reading (August 10)

at least

46 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.

The number allowed for the whole year has been exceeded.

at least 43 days more than allowed

at least

189 hours

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

24 hours are allowed in the whole year.

The number allowed for the whole year has been exceeded.

at least 165 hours more than allowed

Worst day: March 1, 2026, SO₂ 517 µg/m³ as a daily average, 4.1 times the limit.

SO₂ was above the alert threshold of 500 µg/m³ for at least 48 hours, three or more hours in a row (on 15 days).

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 42 days above the legal daily limit for PM10 of 50 µg/m³ (35 allowed).

Daily average for 171 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)

All figures by year and month

No data has arrived from this station since August 10, 2026 at 09:00

No reading for 58 days.

On the FHMZ website this station showed current hourly values on October 7, 2026. The data is just not reaching the EEA database, which is where we take it from. The station on the FHMZ website

This station is one of 5 stations in the Federation of BiH from which no data has been arriving since August 10, 2026. The data stopped at almost the same time. When data from several stations stops within a few hours, the cause is probably shared, for example in the data transmission. Where exactly, we cannot tell from here.

Last reading: August 10, 2026 at 09:00
Measured then: NO₂ 34.1 µg/m³, PM10 38.9 µg/m³, SO₂ 13 µg/m³

All outages of this station

Kakanj still has readings: the Kakanj Centar (70A) station, about 1 km from here, is sending data.

To the Kakanj Centar (70A) station page

How the air is changing

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

  • PM10: too few readings to compare
  • NO₂: 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
  • NO₂: too few readings to compare
  • SO₂: too few readings to compare

Show

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 49 % of hours · provisional

Days in 2026: SO₂, daily average above 125 µg/m³

46 days above the limit. 62 days without any reading from the station.

1102031JanFebFeb 2: 283 µg/m³, above the limitFeb 3: 189 µg/m³, above the limitFeb 8: 251 µg/m³, above the limitFeb 9: 171 µg/m³, above the limitFeb 10: 229 µg/m³, above the limitFeb 12: 147 µg/m³, above the limitFeb 14: 160 µg/m³, above the limitFeb 18: 148 µg/m³, above the limitFeb 19: 156 µg/m³, above the limitFeb 23: 167 µg/m³, above the limitFeb 25: 130 µg/m³, above the limitFeb 26: 173 µg/m³, above the limitFeb 27: 223 µg/m³, above the limitFeb 28: 217 µg/m³, above the limitMarMar 1: 517 µg/m³, above the limitMar 2: 169 µg/m³, above the limitMar 6: 166 µg/m³, above the limitMar 9: 168 µg/m³, above the limitMar 10: 147 µg/m³, above the limitMar 11: 186 µg/m³, above the limitMar 13: 232 µg/m³, above the limitMar 22: 167 µg/m³, above the limitMar 25: 271 µg/m³, above the limitAprApr 5: no data from the stationApr 6: no data from the stationApr 11: no data from the stationApr 12: no data from the stationApr 19: 214 µg/m³, above the limitApr 21: 128 µg/m³, above the limitApr 23: 188 µg/m³, above the limitApr 25: 197 µg/m³, above the limitApr 27: 165 µg/m³, above the limitApr 28: 140 µg/m³, above the limitMayMay 4: 180 µg/m³, above the limitMay 10: 201 µg/m³, above the limitMay 18: 156 µg/m³, above the limitMay 30: 257 µg/m³, above the limitJunJun 10: no data from the stationJun 16: 165 µg/m³, above the limitJun 20: 210 µg/m³, above the limitJun 28: 168 µg/m³, above the limitJun 29: 202 µg/m³, above the limitJulJul 6: 133 µg/m³, above the limitJul 14: 203 µg/m³, above the limitJul 23: 148 µg/m³, above the limitJul 29: 185 µg/m³, above the limitJul 30: 145 µg/m³, above the limitAugAug 2: 126 µg/m³, above the limitAug 3: 136 µg/m³, above the limitAug 5: 176 µg/m³, above the limitAug 6: 128 µg/m³, above the limitAug 11: no data from the stationAug 12: no data from the stationAug 13: no data from the stationAug 14: no data from the stationAug 15: no data from the stationAug 16: no data from the stationAug 17: no data from the stationAug 18: no data from the stationAug 19: no data from the stationAug 20: no data from the stationAug 21: no data from the stationAug 22: no data from the stationAug 23: no data from the stationAug 24: no data from the stationAug 25: no data from the stationAug 26: no data from the stationAug 27: no data from the stationAug 28: no data from the stationAug 29: no data from the stationAug 30: no data from the stationAug 31: no data from the stationSepSep 1: no data from the stationSep 2: no data from the stationSep 3: no data from the stationSep 4: no data from the stationSep 5: no data from the stationSep 6: no data from the stationSep 7: no data from the stationSep 8: no data from the stationSep 9: no data from the stationSep 10: no data from the stationSep 11: no data from the stationSep 12: no data from the stationSep 13: no data from the stationSep 14: no data from the stationSep 15: no data from the stationSep 16: no data from the stationSep 17: no data from the stationSep 18: no data from the stationSep 19: no data from the stationSep 20: no data from the stationSep 21: no data from the stationSep 22: no data from the stationSep 23: no data from the stationSep 24: no data from the stationSep 25: no data from the stationSep 26: no data from the stationSep 27: no data from the stationSep 28: no data from the stationSep 29: no data from the stationSep 30: no data from the stationOctOct 1: no data from the stationOct 2: no data from the stationOct 3: no data from the stationOct 4: no data from the stationOct 5: no data from the stationOct 6: no data from the stationNovDec
  • 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 (46)
  1. Feb 2 283
  2. Feb 3 189
  3. Feb 8 251
  4. Feb 9 171
  5. Feb 10 229
  6. Feb 12 147
  7. Feb 14 160
  8. Feb 18 148
  9. Feb 19 156
  10. Feb 23 167
  11. Feb 25 130
  12. Feb 26 173
  13. Feb 27 223
  14. Feb 28 217
  15. Mar 1 517
  16. Mar 2 169
  17. Mar 6 166
  18. Mar 9 168
  19. Mar 10 147
  20. Mar 11 186
  21. Mar 13 232
  22. Mar 22 167
  23. Mar 25 271
  24. Apr 19 214
  25. Apr 21 128
  26. Apr 23 188
  27. Apr 25 197
  28. Apr 27 165
  29. Apr 28 140
  30. May 4 180
  31. May 10 201
  32. May 18 156
  33. May 30 257
  34. Jun 16 165
  35. Jun 20 210
  36. Jun 28 168
  37. Jun 29 202
  38. Jul 6 133
  39. Jul 14 203
  40. Jul 23 148
  41. Jul 29 185
  42. Jul 30 145
  43. Aug 2 126
  44. Aug 3 136
  45. Aug 5 176
  46. Aug 6 128

Values in µg/m³, limit 125 µg/m³.

Months of 2026

MonthDays above 125Hours above 350Highest dayNo readings
January001000
February14 above the number allowed312830
March9 above the number allowed275170
April6 above the number allowed182144
May4 above the number allowed222570
June4 above the number allowed342101
July5 above the number allowed412030
August4 above the number allowed1617621
September30
October up to yesterday6

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
Last 30 days, daily average: SO₂ in µg/m³There are no readings for this period.00.519/99/169/239/30
no data from the station
Last 30 days, daily average: SO₂ in µg/m³
Values as a table
Dayµg/m³Note
Tue, 10/6no data from the station
Mon, 10/5no data from the station
Sun, 10/4no data from the station
Sat, 10/3no data from the station
Fri, 10/2no data from the station
Thu, 10/1no data from the station
Wed, 9/30no data from the station
Tue, 9/29no data from the station
Mon, 9/28no data from the station
Sun, 9/27no data from the station
Sat, 9/26no data from the station
Fri, 9/25no data from the station
Thu, 9/24no data from the station
Wed, 9/23no data from the station
Tue, 9/22no data from the station
Mon, 9/21no data from the station
Sun, 9/20no data from the station
Sat, 9/19no data from the station
Fri, 9/18no data from the station
Thu, 9/17no data from the station
Wed, 9/16no data from the station
Tue, 9/15no data from the station
Mon, 9/14no data from the station
Sun, 9/13no data from the station
Sat, 9/12no data from the station
Fri, 9/11no data from the station
Thu, 9/10no data from the station
Wed, 9/9no data from the station
Tue, 9/8no data from the station
Mon, 9/7no data from the station
Last 12 months, monthly average: SO₂ in µg/m³highest 139 µg/m³, latest 65 µg/m³050100150DecFebAprJunAugOcthighest 139latest 65
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
Monthµg/m³a year earlierNote
October 2026 so fartoo few readings6 days without data from the station
September 2026too few readings30 days without data from the station
August 2026too few readingsmeasured in 30 % of hours · provisional · 21 days without data from the station
July 202665.4measured in 95 % of hours · provisional
June 202668.2measured in 78 % of hours · provisional · 1 day without data from the station
May 202691.8measured in 94 % of hours · provisional
April 202694measured in 79 % of hours · provisional · 4 days without data from the station
March 2026125.5measured in 100 % of hours · provisional
February 2026139.5measured in 100 % of hours · provisional
January 2026too few readingsmeasured in 11 % of hours · provisional
December 2025too few readings
November 2025too few readings

SO₂ by year

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

Measure2026*
Days above 125 µg/m³ (allowed 3)≥ 46 above the number allowed
Hours above 350 µg/m³ (allowed 24)≥ 189 above the number allowed
Hours above 500 µg/m³, three hours in a row (alert threshold)≥ 48 above the number allowed
Annual average, µg/m³ (legal limit 50)too few
Highest daily average, µg/m³517March 1
Highest hourly value, µg/m³3,915March 1
Hours measured64 %
Days without any reading from the station62

* 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.

■ 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 50 µg/m³, 18 days allowed. In 2026 there were 141 such days.
  • WHO 2021: daily 40 µg/m³, at most three to four days a year. In 2026 there were 148 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

DayAverageTimes the limit
Mar 1, 2026provisional5174.1 ×
Feb 2, 2026provisional2832.3 ×
Mar 25, 2026provisional2712.2 ×
May 30, 2026provisional2572.1 ×
Feb 8, 2026provisional2512.0 ×

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: 69

6 outages, 1,658 hours in total in the last 12 months.

Timeline of outages from October 7, 2025 to today

FromToDuration
Aug 10, 2026 09:00still ongoing58 days
Jul 1, 2026 09:00Jul 2, 2026 09:0024 hours
Jun 9, 2026 05:00Jun 11, 2026 11:002 days
May 23, 2026 01:00May 24, 2026 08:0031 hours
Apr 10, 2026 04:00Apr 13, 2026 11:003 days
Apr 4, 2026 12:00Apr 7, 2026 09:003 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). In Zenica-Doboj Canton the Ministry of Physical Planning, Transport, Communications and Environmental Protection is responsible for environmental protection. The 2024 intervention plan was adopted by the Government of the canton.
Municipality
May run its own stations with the consent of the canton and must publish their results (Art. 16 and 17). Under the Zenica-Doboj Canton intervention plan (Official Gazette ZDK 3/24, Art. 3), the mayor of the municipality or city declares readiness based on the report of the authorised expert institution, and warning and alert based on the decision of the operational headquarters.
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).

In Zenica-Doboj Canton the procedure is set by the intervention plan (Official Gazette ZDK 3/24) in three stages: readiness, warning and alert. An alert also requires a forecast of stable weather for the next 48 hours.

The canton also has an Action Plan for Air Quality Protection from 2020 (Official Gazette ZDK 9/20), adopted under the earlier law. We could not tell from the published decision how long it applies.

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

Other stations in Kakanj

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