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Air at the Jajce - Harmani station

Jajce, Central Bosnia Canton · Federation of Bosnia and Herzegovina

Network: Federal Hydrometeorological Institute · Station code: BA0040A

This year, up to yesterday (October 6)

at least

22 days

with an 8-hour average of ozone (O₃) above the target value of 120 µg/m³.

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

at least

12 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.

Worst day: August 11, 2026, O₃ 149 µg/m³ as a daily average, 1.2 times the limit.

Daily average for 53 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

Moderate

Air now · Measured at 21:00

Latest values

Latest value: 21:00

Readings
PollutantValueLevel
PM1046 µg/m³Moderate
O₃40.5 µg/m³Good
SO₂6.6 µg/m³Good

How the air is changing

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

  • PM10: average 18.7 µg/m³, week before 14.4 µg/m³
  • NO₂: too few readings to compare
  • O₃: average 52 µg/m³, week before 49.5 µg/m³
  • SO₂: average 8.6 µg/m³, week before 5.2 µg/m³

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

  • PM10: too few readings to compare
  • NO₂: too few readings to compare
  • O₃: too few readings to compare
  • SO₂: too few readings to compare

Show

Ozone O₃

40.5

Nowµg/m³

Measured at 21:00

51.7

Last 24 hoursµg/m³

measured in 92 % of hours · provisional

52

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 15 % of hours · provisional

Days in 2026: O₃, 8-hour average above 120 µg/m³

22 days above the limit. 27 days without any reading from the station.

1102031JanJan 10: no data from the stationJan 27: no data from the stationFebMarAprApr 5: no data from the stationApr 6: no data from the stationApr 11: no data from the stationApr 12: no data from the stationMayJunJun 10: no data from the stationJulJul 27: 120 µg/m³, above the limitJul 30: 123 µg/m³, above the limitJul 31: 122 µg/m³, above the limitAugAug 2: 120 µg/m³, above the limitAug 4: 127 µg/m³, above the limitAug 5: 133 µg/m³, above the limitAug 6: 132 µg/m³, above the limitAug 7: 139 µg/m³, above the limitAug 8: 125 µg/m³, above the limitAug 9: 136 µg/m³, above the limitAug 10: 140 µg/m³, above the limitAug 11: 149 µg/m³, above the limitAug 12: 133 µg/m³, above the limitAug 13: 138 µg/m³, above the limitAug 14: 131 µg/m³, above the limitAug 15: 134 µg/m³, above the limitAug 16: 125 µg/m³, above the limitAug 19: 125 µg/m³, above the limitAug 20: 126 µg/m³, above the limitAug 21: 125 µg/m³, above the limitAug 23: 120 µg/m³, above the limitAug 24: 127 µg/m³, above the limitSepSep 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 stationOctNovDec
  • 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 (22)
  1. Jul 27 120
  2. Jul 30 123
  3. Jul 31 122
  4. Aug 2 120
  5. Aug 4 127
  6. Aug 5 133
  7. Aug 6 132
  8. Aug 7 139
  9. Aug 8 125
  10. Aug 9 136
  11. Aug 10 140
  12. Aug 11 149
  13. Aug 12 133
  14. Aug 13 138
  15. Aug 14 131
  16. Aug 15 134
  17. Aug 16 125
  18. Aug 19 125
  19. Aug 20 126
  20. Aug 21 125
  21. Aug 23 120
  22. Aug 24 127

Values in µg/m³, limit 120 µg/m³.

Months of 2026

MonthDays above 120Highest 8 hNo readings
January2
February0
March0
April4
May0
June1
July3 above the number allowed1230
August19 above the number allowed1490
September09520
October up to yesterday01020

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.

Last 7 days, every hour: O₃ in µg/m³highest 114 µg/m³, latest 40 µg/m³ (21:00)050100150ThuFriSatSunMonTueWedlatest 40 (21:00)
measuredmodel estimate, not counted
Last 7 days, every hour: O₃ in µg/m³
Values as a table
Hour toµg/m³Note
Wednesday, 10/7
22:0063model estimate, not counted
21:0040.5
20:0057.5
19:0068.7
18:0081.7
17:0098.7
16:00105.3
15:00108.1
14:00104.5
13:0094.3
12:0080.4
11:0056.1
10:0024
09:0021.1
08:0015.3
07:0019.3
06:0021.3
05:0023.1
04:0023
03:0023.1
02:0013.9
01:0028.8
Tuesday, 10/6
00:0028.6
23:0032.2
22:0039.4
21:0037.7
20:0041.3
19:0076.3
18:0081.6
17:0097.8
16:00105.4
15:00100.6
14:0097.5
13:0094
12:0087.6
11:0065.7
10:0033.6
09:0025.6
08:0025.9
07:0028.2
06:0033
05:0031.5
04:0023.6
03:0024
02:0013.5
01:0026.8
Monday, 10/5
00:0026.4
23:0027.8
22:0031.8
21:0036.2
20:0061.1
19:0094.1
18:00113.7
17:00112
16:00109.8
15:00106.2
14:00105.5
13:0091.4
12:0080.3
11:0065.9
10:0033.6
09:0025.5
08:0025.1
07:0027.6
06:0031.9
05:0024.3
04:0025.2
03:0024.8
02:0013.6
01:0025.7
Sunday, 10/4
00:0023.8
23:0027.9
22:0034.9
21:0042.8
20:0067.4
19:0075.3
18:0092.4
17:00102.7
16:00102.4
15:0098.8
14:0098.9
13:0091.7
12:0080.5
11:0068.3
10:0034.9
09:0029.2
08:0027.6
07:0029.1
06:0027.1
05:0025.9
04:0023.2
03:0022
02:0013.3
01:0023.8
Saturday, 10/3
00:0022.8
23:0025.1
22:0027.9
21:0035.6
20:0043.5
19:0077.3
18:0096.8
17:00107.5
16:00105.4
15:00103.6
14:00102.1
13:0096.4
12:0085
11:0056
10:0036.8
09:0028.4
08:0025.9
07:0029.5
06:0028.2
05:0021.8
04:0023
03:0021.5
02:0013.6
01:0025.9
Friday, 10/2
00:0025.4
23:0033.5
22:0036.4
21:0037.9
20:0057.3
19:0077.8
18:00111.9
17:00106.5
16:00102.7
15:0097.8
14:0093
13:0085.2
12:0076
11:0057.7
10:0032.1
09:0028.8
08:0022.8
07:0024.5
06:0027.4
05:0024
04:0024.6
03:0024.6
02:0014.3
01:0027.6
Thursday, 10/1
00:0028.1
23:0028.7
22:0027.7
21:0042.7
20:0045.6
19:0078.8
18:00105.6
17:00105.4
16:0097.3
15:0098.6
14:0095.4
13:0089.8
12:0075.4
11:0048.8
10:0035.5
09:0025.8
08:0021.8
07:0025.9
06:0029.2
05:0028.2
04:0024.9
03:0021.6
02:0012.9
01:0024.1
Last 30 days, highest 8-hour average of the day: O₃ in µg/m³highest 102 µg/m³, latest 93 µg/m³0501001509/99/169/239/30latest 93
too few readingstarget value, 120 µg/m³no data from the station
Last 30 days, highest 8-hour average of the day: O₃ in µg/m³
Values as a table
Dayµg/m³Note
Tue, 10/692.6provisional
Mon, 10/5101.6provisional
Sun, 10/492.8provisional
Sat, 10/396.7provisional
Fri, 10/293.9provisional
Thu, 10/193.3provisional
Wed, 9/3087.7provisional
Tue, 9/2995.3provisional
Mon, 9/2893.9provisional
Sun, 9/2779.6provisional
Sat, 9/2672.3provisional
Fri, 9/2576.3provisional
Thu, 9/2474.3provisional
Wed, 9/2365.2provisional
Tue, 9/22too few readings
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: O₃ in µg/m³highest 78 µg/m³, latest 52 µg/m³050100DecFebAprJunAugOcthighest 78latest 52
Last 12 monthsthis month so fara year earliermonth with days without data from the station
Last 12 months, monthly average: O₃ in µg/m³
Values as a table
Monthµg/m³a year earlierNote
October 2026 so far52.4measured in 100 % of hours · provisional
September 2026too few readingsmeasured in 30 % of hours · provisional · 20 days without data from the station
August 202678.2measured in 97 % of hours · provisional
July 2026too few readingsmeasured in 34 % of hours · provisional
June 2026too few readings1 day without data from the station
May 2026too few readings
April 2026too few readings4 days without data from the station
March 2026too few readings
February 2026too few readings
January 2026too few readingstoo few readings2 days without data from the station
December 2025too few readings34
November 2025too few readings35.2

O₃ by year

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

Measure2026*20252024
Days with 8-hour average above 120 µg/m³ (target value 25)≥ 22²0²261
Annual average, µg/m³too fewtoo few115.4
Highest 8-hour average, µg/m³149August 1186January 3313July 19
Hours measured20 %2 %96 %
Days without any reading from the station27011

* 2026 up to October 6; the average since the start of the year is not yet an annual average.

The monitoring networks have not yet finally verified this year’s data. The EEA publishes verified values once a year.

≥ means at least: more than a tenth of the days or hours are missing, so the real number may be higher.

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

■ and a figure in red: more than is allowed for the whole year.

The column for 2023 is shown on wider screens.

The worst days of 2026

DayHighest 8 hTimes the limit
Aug 11, 2026provisional1491.2 ×
Aug 10, 2026provisional1401.2 ×
Aug 7, 2026provisional1391.2 ×
Aug 13, 2026provisional1381.2 ×
Aug 9, 2026provisional1361.1 ×

Daily average in µg/m³, daily limit 120 µg/m³. Days with the same unverified value over many hours are not on this list.

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: 36

8 outages, 853 hours in total in the last 12 months.

Timeline of outages from October 7, 2025 to today

FromToDuration
Sep 1, 2026 09:00Sep 22, 2026 09:0021 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
Jan 26, 2026 15:00Jan 28, 2026 14:0047 hours
Jan 9, 2026 14:00Jan 11, 2026 11:0045 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).

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.

How we measure

samoEKO is a brand of samoLabs, Juelich.