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Air at the Ivan Sedlo station

Hadžići, Sarajevo Canton · Federation of Bosnia and Herzegovina

Network: Federal Hydrometeorological Institute · Station code: BA0001G

This year, up to yesterday (October 7)

at least

60 days

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

The target value allows 25 such days a year, averaged over three years.

In 2025: 68 days above the limit, the target value allows 25 as a three-year average.

at least

10 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 163 µg/m³ as a daily average, 1.4 times the limit.

Daily average for 220 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

Moderate

Air now · Measured at 23:00

Latest values

Latest value: Wed 23:00

Readings
PollutantValueLevel
PM109.6 µg/m³Good
O₃119.3 µg/m³Moderate
SO₂7.6 µg/m³Good

How the air is changing

Over the last seven days there was more PM10, O₃, and SO₂ in the air than the week before.

  • PM10: average 14 µg/m³, week before 11.4 µg/m³
  • NO₂: too few readings to compare
  • O₃: average 91.6 µg/m³, week before 66.5 µg/m³
  • SO₂: average 12.6 µg/m³, week before 10.3 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

119.3

Nowµg/m³

Measured at 23:00

105.5

Last 24 hoursµg/m³

measured in 96 % of hours · provisional

91.6

Last 7 daysµg/m³

measured in 99 % of hours · provisional

too few readings

Last 30 days

measured in 52 % of hours · provisional

too few readings

Last 12 months

measured in 86 % of hours · 1 month with too few readings · provisional

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

164 days above the limit. 9 days without any reading from the station.

1102031JanJan 1: no data from the stationJan 2: no data from the stationJan 3: no data from the stationJan 6: 124 µg/m³, above the limitFebFeb 6: 122 µg/m³, above the limitFeb 9: 121 µg/m³, above the limitFeb 10: 122 µg/m³, above the limitFeb 22: 126 µg/m³, above the limitFeb 23: 132 µg/m³, above the limitFeb 24: 134 µg/m³, above the limitFeb 27: 125 µg/m³, above the limitFeb 28: 125 µg/m³, above the limitMarMar 1: 127 µg/m³, above the limitMar 3: 123 µg/m³, above the limitMar 4: 124 µg/m³, above the limitMar 5: 132 µg/m³, above the limitMar 6: 123 µg/m³, above the limitMar 9: 123 µg/m³, above the limitMar 10: 124 µg/m³, above the limitMar 11: 124 µg/m³, above the limitMar 15: 121 µg/m³, above the limitMar 19: 121 µg/m³, above the limitMar 21: 128 µg/m³, above the limitMar 22: 133 µg/m³, above the limitMar 23: 146 µg/m³, above the limitMar 24: 148 µg/m³, above the limitMar 26: 126 µg/m³, above the limitMar 28: 130 µg/m³, above the limitMar 29: 130 µg/m³, above the limitMar 30: 135 µg/m³, above the limitMar 31: 137 µg/m³, above the limitAprApr 1: 133 µg/m³, above the limitApr 2: 135 µg/m³, above the limitApr 3: 129 µg/m³, above the limitApr 4: 133 µg/m³, above the limitApr 5: 132 µg/m³, above the limitApr 6: 129 µg/m³, above the limitApr 7: 138 µg/m³, above the limitApr 8: 142 µg/m³, above the limitApr 9: 142 µg/m³, above the limitApr 10: 146 µg/m³, above the limitApr 12: 134 µg/m³, above the limitApr 13: 146 µg/m³, above the limitApr 14: 136 µg/m³, above the limitApr 15: 165 µg/m³, above the limitApr 16: 173 µg/m³, above the limitApr 19: 123 µg/m³, above the limitApr 20: 130 µg/m³, above the limitApr 21: 123 µg/m³, above the limitApr 24: 131 µg/m³, above the limitApr 25: 139 µg/m³, above the limitApr 26: 132 µg/m³, above the limitApr 27: 132 µg/m³, above the limitApr 28: 134 µg/m³, above the limitApr 29: 145 µg/m³, above the limitApr 30: 142 µg/m³, above the limitMayMay 2: 126 µg/m³, above the limitMay 3: 122 µg/m³, above the limitMay 4: 129 µg/m³, above the limitMay 5: 145 µg/m³, above the limitMay 6: 141 µg/m³, above the limitMay 7: 134 µg/m³, above the limitMay 8: 129 µg/m³, above the limitMay 11: 132 µg/m³, above the limitMay 12: 148 µg/m³, above the limitMay 13: 135 µg/m³, above the limitMay 16: 126 µg/m³, above the limitMay 17: 151 µg/m³, above the limitMay 18: 140 µg/m³, above the limitMay 19: 142 µg/m³, above the limitMay 24: 123 µg/m³, above the limitMay 25: 122 µg/m³, above the limitMay 29: 136 µg/m³, above the limitMay 30: 135 µg/m³, above the limitMay 31: 138 µg/m³, above the limitJunJun 1: 136 µg/m³, above the limitJun 2: 130 µg/m³, above the limitJun 3: 121 µg/m³, above the limitJun 4: 128 µg/m³, above the limitJun 5: 126 µg/m³, above the limitJun 6: 137 µg/m³, above the limitJun 7: 137 µg/m³, above the limitJun 8: 131 µg/m³, above the limitJun 9: 124 µg/m³, above the limitJun 10: 146 µg/m³, above the limitJun 11: 136 µg/m³, above the limitJun 16: 131 µg/m³, above the limitJun 17: 139 µg/m³, above the limitJun 20: 130 µg/m³, above the limitJun 28: 126 µg/m³, above the limitJun 29: 130 µg/m³, above the limitJun 30: 134 µg/m³, above the limitJulJul 1: 144 µg/m³, above the limitJul 2: 148 µg/m³, above the limitJul 7: 122 µg/m³, above the limitJul 8: 127 µg/m³, above the limitJul 9: 139 µg/m³, above the limitJul 10: 148 µg/m³, above the limitJul 11: 138 µg/m³, above the limitJul 12: 137 µg/m³, above the limitJul 13: 129 µg/m³, above the limitJul 14: 136 µg/m³, above the limitJul 15: 164 µg/m³, above the limitJul 16: 145 µg/m³, above the limitJul 17: 138 µg/m³, above the limitJul 18: 152 µg/m³, above the limitJul 19: 154 µg/m³, above the limitJul 20: 132 µg/m³, above the limitJul 21: 123 µg/m³, above the limitJul 22: 136 µg/m³, above the limitJul 23: 161 µg/m³, above the limitJul 24: 128 µg/m³, above the limitJul 25: 131 µg/m³, above the limitJul 26: 149 µg/m³, above the limitJul 27: 138 µg/m³, above the limitJul 28: 132 µg/m³, above the limitJul 29: 152 µg/m³, above the limitJul 30: 147 µg/m³, above the limitJul 31: 166 µg/m³, above the limitAugAug 1: 156 µg/m³, above the limitAug 2: 171 µg/m³, above the limitAug 3: 156 µg/m³, above the limitAug 4: 164 µg/m³, above the limitAug 5: 153 µg/m³, above the limitAug 6: 135 µg/m³, above the limitAug 7: 146 µg/m³, above the limitAug 8: 146 µg/m³, above the limitAug 9: 167 µg/m³, above the limitAug 10: 138 µg/m³, above the limitAug 11: 148 µg/m³, above the limitAug 12: 169 µg/m³, above the limitAug 13: 169 µg/m³, above the limitAug 14: 150 µg/m³, above the limitAug 15: 184 µg/m³, above the limitAug 16: 194 µg/m³, above the limitAug 17: 160 µg/m³, above the limitAug 18: 144 µg/m³, above the limitAug 21: 130 µg/m³, above the limitAug 22: 144 µg/m³, above the limitAug 23: 155 µg/m³, above the limitAug 24: 161 µg/m³, above the limitAug 25: 179 µg/m³, above the limitAug 26: 183 µg/m³, above the limitAug 27: 161 µg/m³, above the limitAug 28: 146 µg/m³, above the limitAug 29: 158 µg/m³, above the limitAug 30: 163 µg/m³, above the limitAug 31: 153 µg/m³, above the limitSepSep 1: 164 µg/m³, above the limitSep 2: 168 µg/m³, above the limitSep 3: 158 µg/m³, above the limitSep 4: 160 µg/m³, above the limitSep 5: 156 µg/m³, above the limitSep 6: 129 µg/m³, above the limitSep 7: 130 µg/m³, above the limitSep 8: 124 µg/m³, above the limitSep 9: 135 µg/m³, above the limitSep 11: 132 µg/m³, above the limitSep 12: 135 µg/m³, above the limitSep 24: 128 µg/m³, above the limitSep 25: 128 µg/m³, above the limitSep 26: 131 µg/m³, above the limitSep 27: 144 µg/m³, above the limitSep 28: 122 µg/m³, above the limitOctOct 3: 134 µg/m³, above the limitOct 10: 120 µg/m³, above the limitOct 11: 123 µg/m³, above the limitOct 22: no data from the stationOct 23: no data from the stationOct 24: no data from the stationOct 25: no data from the stationOct 26: no data from the stationOct 27: no data from the stationNovDec
  • above the limit
  • below the limit
  • too few readings for the day
  • no data from the station
Days above the limit with values (164)
  1. Jan 6 124
  2. Feb 6 122
  3. Feb 9 121
  4. Feb 10 122
  5. Feb 22 126
  6. Feb 23 132
  7. Feb 24 134
  8. Feb 27 125
  9. Feb 28 125
  10. Mar 1 127
  11. Mar 3 123
  12. Mar 4 124
  13. Mar 5 132
  14. Mar 6 123
  15. Mar 9 123
  16. Mar 10 124
  17. Mar 11 124
  18. Mar 15 121
  19. Mar 19 121
  20. Mar 21 128
  21. Mar 22 133
  22. Mar 23 146
  23. Mar 24 148
  24. Mar 26 126
  25. Mar 28 130
  26. Mar 29 130
  27. Mar 30 135
  28. Mar 31 137
  29. Apr 1 133
  30. Apr 2 135
  31. Apr 3 129
  32. Apr 4 133
  33. Apr 5 132
  34. Apr 6 129
  35. Apr 7 138
  36. Apr 8 142
  37. Apr 9 142
  38. Apr 10 146
  39. Apr 12 134
  40. Apr 13 146
  41. Apr 14 136
  42. Apr 15 165
  43. Apr 16 173
  44. Apr 19 123
  45. Apr 20 130
  46. Apr 21 123
  47. Apr 24 131
  48. Apr 25 139
  49. Apr 26 132
  50. Apr 27 132
  51. Apr 28 134
  52. Apr 29 145
  53. Apr 30 142
  54. May 2 126
  55. May 3 122
  56. May 4 129
  57. May 5 145
  58. May 6 141
  59. May 7 134
  60. May 8 129
  61. May 11 132
  62. May 12 148
  63. May 13 135
  64. May 16 126
  65. May 17 151
  66. May 18 140
  67. May 19 142
  68. May 24 123
  69. May 25 122
  70. May 29 136
  71. May 30 135
  72. May 31 138
  73. Jun 1 136
  74. Jun 2 130
  75. Jun 3 121
  76. Jun 4 128
  77. Jun 5 126
  78. Jun 6 137
  79. Jun 7 137
  80. Jun 8 131
  81. Jun 9 124
  82. Jun 10 146
  83. Jun 11 136
  84. Jun 16 131
  85. Jun 17 139
  86. Jun 20 130
  87. Jun 28 126
  88. Jun 29 130
  89. Jun 30 134
  90. Jul 1 144
  91. Jul 2 148
  92. Jul 7 122
  93. Jul 8 127
  94. Jul 9 139
  95. Jul 10 148
  96. Jul 11 138
  97. Jul 12 137
  98. Jul 13 129
  99. Jul 14 136
  100. Jul 15 164
  101. Jul 16 145
  102. Jul 17 138
  103. Jul 18 152
  104. Jul 19 154
  105. Jul 20 132
  106. Jul 21 123
  107. Jul 22 136
  108. Jul 23 161
  109. Jul 24 128
  110. Jul 25 131
  111. Jul 26 149
  112. Jul 27 138
  113. Jul 28 132
  114. Jul 29 152
  115. Jul 30 147
  116. Jul 31 166
  117. Aug 1 156
  118. Aug 2 171
  119. Aug 3 156
  120. Aug 4 164
  121. Aug 5 153
  122. Aug 6 135
  123. Aug 7 146
  124. Aug 8 146
  125. Aug 9 167
  126. Aug 10 138
  127. Aug 11 148
  128. Aug 12 169
  129. Aug 13 169
  130. Aug 14 150
  131. Aug 15 184
  132. Aug 16 194
  133. Aug 17 160
  134. Aug 18 144
  135. Aug 21 130
  136. Aug 22 144
  137. Aug 23 155
  138. Aug 24 161
  139. Aug 25 179
  140. Aug 26 183
  141. Aug 27 161
  142. Aug 28 146
  143. Aug 29 158
  144. Aug 30 163
  145. Aug 31 153
  146. Sep 1 164
  147. Sep 2 168
  148. Sep 3 158
  149. Sep 4 160
  150. Sep 5 156
  151. Sep 6 129
  152. Sep 7 130
  153. Sep 8 124
  154. Sep 9 135
  155. Sep 11 132
  156. Sep 12 135
  157. Sep 24 128
  158. Sep 25 128
  159. Sep 26 131
  160. Sep 27 144
  161. Sep 28 122
  162. Oct 3 134
  163. Oct 10 120
  164. Oct 11 123

Values in µg/m³, limit 120 µg/m³.

Months of 2024

MonthDays above 120Highest 8 hNo readings
January1 above the number allowed1243
February8 above the number allowed1340
March19 above the number allowed1480
April25 above the number allowed1730
May19 above the number allowed1510
June17 above the number allowed1460
July27 above the number allowed1660
August29 above the number allowed1940
September16 above the number allowed1680
October3 above the number allowed1346
November0940
December01010

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 130 µg/m³, latest 119 µg/m³ (23:00)050100150ThuFriSatSunMonTueWedhighest 130latest 119 (23:00)
measuredmodel estimate, not counted
Last 7 days, every hour: O₃ in µg/m³
Values as a table
Hour toµg/m³Note
Wednesday, 10/7
00:0065model estimate, not counted
23:00119.3
22:00121.6
21:00124.1
20:00123
19:00121.1
18:00121.9
17:00122.2
16:00121.5
15:00120.7
14:00119.1
13:00112.4
12:00107.3
11:00102.3
10:0098.5
09:0090.3
08:0070.8
07:0083.4
06:0082.4
05:0086
04:0091.6
03:0093.1
02:0096.7
01:0097.8
Tuesday, 10/6
00:00125.2
23:0098.8
22:00102.8
21:00104.3
20:00105.3
19:00103.7
18:00112.7
17:00129.6
16:00123.9
15:00121
14:00115.5
13:00106.5
12:0098.3
11:0096
10:0090.1
09:0076.2
08:0073.8
07:0080.7
06:0080.5
05:0086.3
04:0091.1
03:0089.8
02:0096.7
01:0096
Monday, 10/5
00:0097.8
23:00121.2
22:0094.5
21:0094.3
20:0098
19:0094.1
18:0097.3
17:00103
16:00108.2
15:00105.3
14:00108.6
13:00105.7
12:00100.1
11:0081.9
10:0081.2
09:0068.2
08:0071
07:0075.1
06:0077.4
05:0077.9
04:0082.7
03:0082.6
02:0085.1
01:0091.4
Sunday, 10/4
00:0090.6
23:0091.6
22:0093.4
21:0099.5
20:0096.4
19:0095.5
18:0092.4
17:00107.2
16:00108.6
15:00108
14:00105.2
13:0097.7
12:0091.4
11:0082.9
10:0078.3
09:0075.8
08:0074.9
07:0077.3
06:00103.9
05:0082.2
04:0079.5
03:0081.9
02:0081.5
01:0085.8
Saturday, 10/3
00:0081.5
23:0090.5
22:0090.4
21:0089.9
20:0094.8
19:0095
18:0098.6
17:00109.1
16:00107.5
15:00105.3
14:00103
13:00101.6
12:0098.5
11:0091.2
10:0075.9
09:0073.8
08:0076.1
07:0076.8
06:0080.2
05:0083.2
04:0080.3
03:0078.3
02:0081.5
01:0085
Friday, 10/2
00:0086.3
23:0087.7
22:0087
21:0088.3
20:0092
19:0096.5
18:0099.9
17:00110.9
16:00110.6
15:00107.2
14:00101.7
13:0092.9
12:0086.4
11:0083.4
10:0066.4
09:0068.9
08:0065.4
07:0064.2
06:0067.9
05:0069
04:0097.2
03:0069.7
02:0072.6
01:0073.6
Thursday, 10/1
00:0075.5
23:0078.7
22:0082.8
21:0082.4
20:0085.5
19:0086.6
18:0099.2
17:00106.8
16:00105.4
15:00100.3
14:0096.1
13:0089.4
12:0083.8
11:0074.4
10:0063.6
09:0063.5
08:0052.7
07:0056.9
06:0059.1
05:0058.2
04:0061.3
03:0091.7
02:0066.2
Last 30 days, highest 8-hour average of the day: O₃ in µg/m³ · 1 day above the limithighest 122 µg/m³, latest 122 µg/m³0501001509/109/179/2410/1highest 122
day above the limittoo few readingstarget value, 120 µg/m³no data from the station
Last 30 days, highest 8-hour average of the day: O₃ in µg/m³ · 1 day above the limit
Values as a table
Dayµg/m³Note
Wed, 10/7122above the limit · provisional
Tue, 10/6114.8provisional
Mon, 10/5102.8provisional
Sun, 10/4101.6provisional
Sat, 10/3102.3provisional
Fri, 10/2101.5provisional
Thu, 10/196.2provisional
Wed, 9/3093.2provisional
Tue, 9/29105provisional
Mon, 9/28100.5provisional
Sun, 9/2779.9provisional
Sat, 9/2662.5provisional
Fri, 9/2580.9provisional
Thu, 9/2490.6provisional
Wed, 9/2372.8provisional
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
Last 12 months, monthly average: O₃ in µg/m³highest 106 µg/m³, latest 92 µg/m³050100150DecFebAprJunAugOcthighest 106latest 92
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 far91.663.3measured in 99 % of hours · provisional · year before: same days
September 2026too few readings68.6measured in 30 % of hours · provisional · 20 days without data from the station
August 202610697.6measured in 97 % of hours · provisional
July 2026too few readings99.5measured in 62 % of hours · provisional · 2 days without data from the station
June 202689106.8measured in 92 % of hours · provisional · 1 day without data from the station
May 202699.195measured in 94 % of hours · provisional
April 202699.493.2measured in 79 % of hours · provisional · 4 days without data from the station
March 202691.995.7measured in 100 % of hours · provisional
February 202681.178.2measured in 99 % of hours · provisional
January 20267374.7measured in 87 % of hours · provisional · 2 days without data from the station
December 202545.556.7measured in 100 % of hours · verified
November 202559.657.4measured in 98 % of hours · verified

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)≥ 6068164
Annual average, µg/m³too few81.694.2
Highest 8-hour average, µg/m³163August 11151June 24194August 16
Hours measured83 %100 %96 %
Days without any reading from the station2909

* 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.

The column for 2023 is shown on wider screens.

The worst days of 2024

DayHighest 8 hTimes the limit
Aug 16, 20241941.6 ×
Aug 15, 20241841.5 ×
Aug 26, 20241831.5 ×
Aug 25, 20241791.5 ×
Apr 16, 20241731.4 ×

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: 39

9 outages, 938 hours in total in the last 12 months.

Timeline of outages from October 8, 2025 to today

FromToDuration
Sep 1, 2026 09:00Sep 22, 2026 09:0021 days
Jul 17, 2026 10:00Jul 20, 2026 23:004 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

Other stations in Hadžići

samoEKO is a brand of samoLabs, Juelich.