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Air at the Bihac station

Bihać, Una-Sana Canton · Federation of Bosnia and Herzegovina

Network: Federal Hydrometeorological Institute · Station code: BA0058A

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

at least

39 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.

at least

5 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: July 16, 2026, O₃ 375 µg/m³ as a daily average, 3.1 times the limit.

Also: at least 3 hours above the legal hourly limit for SO₂ of 350 µg/m³ (too few readings to compare with the allowed number).

Also: at least 2 hours above the legal hourly limit for NO₂ of 200 µg/m³ (too few readings to compare with the allowed number).

Daily average for 195 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 08:00

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 08:00
Measured then: NO₂ 19 µg/m³, O₃ 44.4 µg/m³, PM10 13.3 µg/m³, SO₂ 2.1 µg/m³

All outages of this station

Nearest station measuring now: Plitvička Jezera, Croatia, about 23 km away.

That reading is from another place. Your air may be better or worse.

Go to that station

How the air is changing

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

  • PM10: too few readings to compare
  • PM2.5: too few readings to compare
  • NO₂: too few readings to compare
  • O₃: 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
  • PM2.5: 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

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 56 % of hours · provisional

Days in 2023: O₃, 8-hour average above 120 µg/m³

234 days above the limit.

1102031JanJan 2: 122 µg/m³, above the limitJan 3: 123 µg/m³, above the limitJan 7: 126 µg/m³, above the limitJan 8: 134 µg/m³, above the limitJan 9: 138 µg/m³, above the limitJan 15: 137 µg/m³, above the limitJan 16: 138 µg/m³, above the limitJan 17: 140 µg/m³, above the limitJan 18: 141 µg/m³, above the limitFebFeb 1: 126 µg/m³, above the limitFeb 2: 125 µg/m³, above the limitFeb 3: 134 µg/m³, above the limitFeb 4: 120 µg/m³, above the limitFeb 19: 122 µg/m³, above the limitFeb 24: 151 µg/m³, above the limitFeb 25: 157 µg/m³, above the limitMarMar 5: 135 µg/m³, above the limitMar 6: 162 µg/m³, above the limitMar 7: 182 µg/m³, above the limitMar 8: 184 µg/m³, above the limitMar 9: 176 µg/m³, above the limitMar 10: 160 µg/m³, above the limitMar 11: 149 µg/m³, above the limitMar 12: 162 µg/m³, above the limitMar 13: 173 µg/m³, above the limitMar 14: 183 µg/m³, above the limitMar 15: 172 µg/m³, above the limitMar 16: 151 µg/m³, above the limitMar 17: 156 µg/m³, above the limitMar 18: 183 µg/m³, above the limitMar 19: 191 µg/m³, above the limitMar 20: 188 µg/m³, above the limitMar 21: 153 µg/m³, above the limitMar 22: 160 µg/m³, above the limitMar 23: 159 µg/m³, above the limitMar 24: 196 µg/m³, above the limitMar 25: 196 µg/m³, above the limitMar 26: 177 µg/m³, above the limitMar 27: 177 µg/m³, above the limitMar 28: 162 µg/m³, above the limitMar 29: 186 µg/m³, above the limitMar 30: 188 µg/m³, above the limitMar 31: 194 µg/m³, above the limitAprApr 1: 195 µg/m³, above the limitApr 2: 149 µg/m³, above the limitApr 3: 138 µg/m³, above the limitApr 4: 148 µg/m³, above the limitApr 5: 162 µg/m³, above the limitApr 6: 176 µg/m³, above the limitApr 7: 190 µg/m³, above the limitApr 8: 181 µg/m³, above the limitApr 9: 162 µg/m³, above the limitApr 10: 142 µg/m³, above the limitApr 11: 164 µg/m³, above the limitApr 12: 174 µg/m³, above the limitApr 13: 187 µg/m³, above the limitApr 14: 166 µg/m³, above the limitApr 15: 175 µg/m³, above the limitApr 16: 161 µg/m³, above the limitApr 18: 134 µg/m³, above the limitApr 19: 156 µg/m³, above the limitApr 20: 144 µg/m³, above the limitApr 21: 173 µg/m³, above the limitApr 22: 182 µg/m³, above the limitApr 23: 189 µg/m³, above the limitApr 24: 197 µg/m³, above the limitApr 25: 182 µg/m³, above the limitApr 26: 162 µg/m³, above the limitApr 27: 178 µg/m³, above the limitApr 28: 194 µg/m³, above the limitApr 29: 189 µg/m³, above the limitApr 30: 175 µg/m³, above the limitMayMay 1: 152 µg/m³, above the limitMay 4: 123 µg/m³, above the limitMay 5: 165 µg/m³, above the limitMay 6: 190 µg/m³, above the limitMay 7: 178 µg/m³, above the limitMay 8: 147 µg/m³, above the limitMay 9: 130 µg/m³, above the limitMay 13: 123 µg/m³, above the limitMay 15: 123 µg/m³, above the limitMay 16: 126 µg/m³, above the limitMay 21: 176 µg/m³, above the limitMay 22: 188 µg/m³, above the limitMay 23: 187 µg/m³, above the limitMay 24: 170 µg/m³, above the limitMay 25: 157 µg/m³, above the limitMay 26: 187 µg/m³, above the limitMay 27: 172 µg/m³, above the limitMay 28: 171 µg/m³, above the limitMay 29: 161 µg/m³, above the limitMay 30: 137 µg/m³, above the limitJunJun 1: 163 µg/m³, above the limitJun 2: 170 µg/m³, above the limitJun 3: 139 µg/m³, above the limitJun 4: 137 µg/m³, above the limitJun 7: 137 µg/m³, above the limitJun 8: 136 µg/m³, above the limitJun 9: 131 µg/m³, above the limitJun 10: 147 µg/m³, above the limitJun 12: 147 µg/m³, above the limitJun 13: 162 µg/m³, above the limitJun 14: 141 µg/m³, above the limitJun 15: 154 µg/m³, above the limitJun 16: 188 µg/m³, above the limitJun 17: 195 µg/m³, above the limitJun 18: 235 µg/m³, above the limitJun 19: 195 µg/m³, above the limitJun 20: 211 µg/m³, above the limitJun 21: 186 µg/m³, above the limitJun 22: 132 µg/m³, above the limitJun 24: 148 µg/m³, above the limitJun 25: 155 µg/m³, above the limitJun 26: 175 µg/m³, above the limitJun 27: 171 µg/m³, above the limitJun 28: 158 µg/m³, above the limitJun 29: 169 µg/m³, above the limitJun 30: 193 µg/m³, above the limitJulJul 1: 200 µg/m³, above the limitJul 2: 177 µg/m³, above the limitJul 3: 138 µg/m³, above the limitJul 4: 143 µg/m³, above the limitJul 5: 145 µg/m³, above the limitJul 6: 130 µg/m³, above the limitJul 7: 158 µg/m³, above the limitJul 8: 183 µg/m³, above the limitJul 9: 181 µg/m³, above the limitJul 10: 195 µg/m³, above the limitJul 11: 158 µg/m³, above the limitJul 12: 198 µg/m³, above the limitJul 13: 207 µg/m³, above the limitJul 14: 151 µg/m³, above the limitJul 15: 170 µg/m³, above the limitJul 16: 161 µg/m³, above the limitJul 17: 166 µg/m³, above the limitJul 18: 142 µg/m³, above the limitJul 19: 137 µg/m³, above the limitJul 20: 160 µg/m³, above the limitJul 21: 139 µg/m³, above the limitJul 22: 135 µg/m³, above the limitJul 23: 145 µg/m³, above the limitJul 24: 174 µg/m³, above the limitJul 25: 184 µg/m³, above the limitJul 26: 128 µg/m³, above the limitJul 27: 155 µg/m³, above the limitJul 28: 197 µg/m³, above the limitJul 29: 196 µg/m³, above the limitJul 30: 147 µg/m³, above the limitJul 31: 129 µg/m³, above the limitAugAug 1: 168 µg/m³, above the limitAug 2: 157 µg/m³, above the limitAug 3: 159 µg/m³, above the limitAug 4: 156 µg/m³, above the limitAug 7: 124 µg/m³, above the limitAug 10: 141 µg/m³, above the limitAug 11: 146 µg/m³, above the limitAug 12: 162 µg/m³, above the limitAug 13: 173 µg/m³, above the limitAug 14: 172 µg/m³, above the limitAug 15: 174 µg/m³, above the limitAug 16: 180 µg/m³, above the limitAug 17: 167 µg/m³, above the limitAug 18: 168 µg/m³, above the limitAug 19: 125 µg/m³, above the limitAug 20: 148 µg/m³, above the limitAug 21: 157 µg/m³, above the limitAug 22: 167 µg/m³, above the limitAug 23: 171 µg/m³, above the limitAug 24: 148 µg/m³, above the limitAug 25: 155 µg/m³, above the limitAug 26: 176 µg/m³, above the limitAug 27: 159 µg/m³, above the limitAug 28: 182 µg/m³, above the limitAug 29: 184 µg/m³, above the limitSepSep 1: 143 µg/m³, above the limitSep 2: 137 µg/m³, above the limitSep 3: 130 µg/m³, above the limitSep 4: 152 µg/m³, above the limitSep 5: 141 µg/m³, above the limitSep 6: 150 µg/m³, above the limitSep 7: 175 µg/m³, above the limitSep 8: 181 µg/m³, above the limitSep 9: 176 µg/m³, above the limitSep 10: 190 µg/m³, above the limitSep 11: 161 µg/m³, above the limitSep 12: 208 µg/m³, above the limitSep 13: 193 µg/m³, above the limitSep 14: 189 µg/m³, above the limitSep 16: 125 µg/m³, above the limitSep 18: 145 µg/m³, above the limitSep 19: 156 µg/m³, above the limitSep 21: 144 µg/m³, above the limitSep 22: 158 µg/m³, above the limitSep 23: 159 µg/m³, above the limitSep 27: 127 µg/m³, above the limitSep 28: 133 µg/m³, above the limitSep 29: 131 µg/m³, above the limitSep 30: 143 µg/m³, above the limitOctOct 3: 125 µg/m³, above the limitOct 4: 121 µg/m³, above the limitOct 5: 122 µg/m³, above the limitOct 6: 128 µg/m³, above the limitOct 12: 152 µg/m³, above the limitOct 13: 130 µg/m³, above the limitOct 14: 156 µg/m³, above the limitOct 15: 157 µg/m³, above the limitOct 19: 135 µg/m³, above the limitOct 20: 142 µg/m³, above the limitOct 21: 135 µg/m³, above the limitOct 22: 134 µg/m³, above the limitOct 23: 135 µg/m³, above the limitOct 24: 143 µg/m³, above the limitOct 25: 148 µg/m³, above the limitOct 26: 137 µg/m³, above the limitOct 27: 139 µg/m³, above the limitOct 28: 141 µg/m³, above the limitOct 29: 147 µg/m³, above the limitOct 30: 150 µg/m³, above the limitOct 31: 147 µg/m³, above the limitNovNov 1: 122 µg/m³, above the limitNov 2: 138 µg/m³, above the limitNov 3: 151 µg/m³, above the limitNov 4: 127 µg/m³, above the limitNov 5: 133 µg/m³, above the limitNov 6: 133 µg/m³, above the limitNov 7: 121 µg/m³, above the limitNov 9: 135 µg/m³, above the limitNov 10: 149 µg/m³, above the limitNov 13: 131 µg/m³, above the limitNov 14: 131 µg/m³, above the limitNov 15: 125 µg/m³, above the limitNov 16: 132 µg/m³, above the limitNov 17: 133 µg/m³, above the limitNov 19: 123 µg/m³, above the limitDec
  • above the limit
  • below the limit
  • too few readings for the day
Days above the limit with values (234)
  1. Jan 2 122
  2. Jan 3 123
  3. Jan 7 126
  4. Jan 8 134
  5. Jan 9 138
  6. Jan 15 137
  7. Jan 16 138
  8. Jan 17 140
  9. Jan 18 141
  10. Feb 1 126
  11. Feb 2 125
  12. Feb 3 134
  13. Feb 4 120
  14. Feb 19 122
  15. Feb 24 151
  16. Feb 25 157
  17. Mar 5 135
  18. Mar 6 162
  19. Mar 7 182
  20. Mar 8 184
  21. Mar 9 176
  22. Mar 10 160
  23. Mar 11 149
  24. Mar 12 162
  25. Mar 13 173
  26. Mar 14 183
  27. Mar 15 172
  28. Mar 16 151
  29. Mar 17 156
  30. Mar 18 183
  31. Mar 19 191
  32. Mar 20 188
  33. Mar 21 153
  34. Mar 22 160
  35. Mar 23 159
  36. Mar 24 196
  37. Mar 25 196
  38. Mar 26 177
  39. Mar 27 177
  40. Mar 28 162
  41. Mar 29 186
  42. Mar 30 188
  43. Mar 31 194
  44. Apr 1 195
  45. Apr 2 149
  46. Apr 3 138
  47. Apr 4 148
  48. Apr 5 162
  49. Apr 6 176
  50. Apr 7 190
  51. Apr 8 181
  52. Apr 9 162
  53. Apr 10 142
  54. Apr 11 164
  55. Apr 12 174
  56. Apr 13 187
  57. Apr 14 166
  58. Apr 15 175
  59. Apr 16 161
  60. Apr 18 134
  61. Apr 19 156
  62. Apr 20 144
  63. Apr 21 173
  64. Apr 22 182
  65. Apr 23 189
  66. Apr 24 197
  67. Apr 25 182
  68. Apr 26 162
  69. Apr 27 178
  70. Apr 28 194
  71. Apr 29 189
  72. Apr 30 175
  73. May 1 152
  74. May 4 123
  75. May 5 165
  76. May 6 190
  77. May 7 178
  78. May 8 147
  79. May 9 130
  80. May 13 123
  81. May 15 123
  82. May 16 126
  83. May 21 176
  84. May 22 188
  85. May 23 187
  86. May 24 170
  87. May 25 157
  88. May 26 187
  89. May 27 172
  90. May 28 171
  91. May 29 161
  92. May 30 137
  93. Jun 1 163
  94. Jun 2 170
  95. Jun 3 139
  96. Jun 4 137
  97. Jun 7 137
  98. Jun 8 136
  99. Jun 9 131
  100. Jun 10 147
  101. Jun 12 147
  102. Jun 13 162
  103. Jun 14 141
  104. Jun 15 154
  105. Jun 16 188
  106. Jun 17 195
  107. Jun 18 235
  108. Jun 19 195
  109. Jun 20 211
  110. Jun 21 186
  111. Jun 22 132
  112. Jun 24 148
  113. Jun 25 155
  114. Jun 26 175
  115. Jun 27 171
  116. Jun 28 158
  117. Jun 29 169
  118. Jun 30 193
  119. Jul 1 200
  120. Jul 2 177
  121. Jul 3 138
  122. Jul 4 143
  123. Jul 5 145
  124. Jul 6 130
  125. Jul 7 158
  126. Jul 8 183
  127. Jul 9 181
  128. Jul 10 195
  129. Jul 11 158
  130. Jul 12 198
  131. Jul 13 207
  132. Jul 14 151
  133. Jul 15 170
  134. Jul 16 161
  135. Jul 17 166
  136. Jul 18 142
  137. Jul 19 137
  138. Jul 20 160
  139. Jul 21 139
  140. Jul 22 135
  141. Jul 23 145
  142. Jul 24 174
  143. Jul 25 184
  144. Jul 26 128
  145. Jul 27 155
  146. Jul 28 197
  147. Jul 29 196
  148. Jul 30 147
  149. Jul 31 129
  150. Aug 1 168
  151. Aug 2 157
  152. Aug 3 159
  153. Aug 4 156
  154. Aug 7 124
  155. Aug 10 141
  156. Aug 11 146
  157. Aug 12 162
  158. Aug 13 173
  159. Aug 14 172
  160. Aug 15 174
  161. Aug 16 180
  162. Aug 17 167
  163. Aug 18 168
  164. Aug 19 125
  165. Aug 20 148
  166. Aug 21 157
  167. Aug 22 167
  168. Aug 23 171
  169. Aug 24 148
  170. Aug 25 155
  171. Aug 26 176
  172. Aug 27 159
  173. Aug 28 182
  174. Aug 29 184
  175. Sep 1 143
  176. Sep 2 137
  177. Sep 3 130
  178. Sep 4 152
  179. Sep 5 141
  180. Sep 6 150
  181. Sep 7 175
  182. Sep 8 181
  183. Sep 9 176
  184. Sep 10 190
  185. Sep 11 161
  186. Sep 12 208
  187. Sep 13 193
  188. Sep 14 189
  189. Sep 16 125
  190. Sep 18 145
  191. Sep 19 156
  192. Sep 21 144
  193. Sep 22 158
  194. Sep 23 159
  195. Sep 27 127
  196. Sep 28 133
  197. Sep 29 131
  198. Sep 30 143
  199. Oct 3 125
  200. Oct 4 121
  201. Oct 5 122
  202. Oct 6 128
  203. Oct 12 152
  204. Oct 13 130
  205. Oct 14 156
  206. Oct 15 157
  207. Oct 19 135
  208. Oct 20 142
  209. Oct 21 135
  210. Oct 22 134
  211. Oct 23 135
  212. Oct 24 143
  213. Oct 25 148
  214. Oct 26 137
  215. Oct 27 139
  216. Oct 28 141
  217. Oct 29 147
  218. Oct 30 150
  219. Oct 31 147
  220. Nov 1 122
  221. Nov 2 138
  222. Nov 3 151
  223. Nov 4 127
  224. Nov 5 133
  225. Nov 6 133
  226. Nov 7 121
  227. Nov 9 135
  228. Nov 10 149
  229. Nov 13 131
  230. Nov 14 131
  231. Nov 15 125
  232. Nov 16 132
  233. Nov 17 133
  234. Nov 19 123

Values in µg/m³, limit 120 µg/m³.

Months of 2023

MonthDays above 120Highest 8 hNo readings
January9 above the number allowed1410
February7 above the number allowed1570
March27 above the number allowed1960
April29 above the number allowed1970
May20 above the number allowed1900
June26 above the number allowed2350
July31 above the number allowed2070
August25 above the number allowed1840
September24 above the number allowed2080
October21 above the number allowed1570
November15 above the number allowed1510
December0940

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: O₃ in µg/m³
Last 30 days, highest 8-hour average of the day: O₃ in µg/m³There are no readings for this period.00.519/99/169/239/30
no 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, 10/6no 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: O₃ in µg/m³highest 120 µg/m³, latest 120 µg/m³050100150DecFebAprJunAugOcthighest 120
Last 12 monthsa 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 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 2026119.7measured in 92 % of hours · provisional
June 202699.3measured in 93 % of hours · provisional · 1 day without data from the station
May 202665.1measured in 94 % of hours · provisional
April 202650.5measured in 79 % of hours · provisional · 4 days without data from the station
March 202639.5measured in 100 % of hours · provisional
February 202630.8measured in 100 % of hours · provisional
January 202648.1measured in 88 % of hours · provisional · 2 days without data from the station
December 2025too few readings31.331 days without data from the station
November 2025too few readings4230 days without data from the station

O₃ by year

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

Measure2026*20242023
Days with 8-hour average above 120 µg/m³ (target value 25)≥ 3916234
Annual average, µg/m³too few56.991.2
Highest 8-hour average, µg/m³375July 16131April 16235June 18
Hours measured73 %97 %100 %
Days without any reading from the station6490

* 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.

The worst days of 2023

DayHighest 8 hTimes the limit
Jun 18, 20232352.0 ×
Jun 20, 20232111.8 ×
Sep 12, 20232081.7 ×
Jul 13, 20232071.7 ×
Jul 1, 20232001.7 ×

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: 73

8 outages, 1,756 hours in total in the last 12 months.

Timeline of outages from October 7, 2025 to today

Grey: for 2025 the archive has no hour from this station, because the EEA's verified annual delivery does not include it. We do not count this as an outage.

FromToDuration
Aug 10, 2026 08:00still 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
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.