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Air at the Banja Luka - Lazarevo station

Banjaluka, Republika Srpska

Network: Republic Hydrometeorological Institute of Republic of Srpska · Station code: BA0065A

This year, up to yesterday (October 6)

76 days

with a daily average of particulate matter PM10 above the legal limit of 50 µg/m³.

35 days are allowed in the whole year.

The number allowed for the whole year has been exceeded.

41 days more than allowed

In 2025: 80 days above the limit, 35 allowed.

20 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.

Worst day: January 24, 2026, PM10 315 µg/m³ as a daily average, 6.3 times the limit.

Also: 2 hours above the legal hourly limit for NO₂ of 150 µg/m³ (18 allowed).

Daily average for 261 of 279 days · data for 2026 not yet finally verified · Yardstick: limits in Republika Srpska (Uredba, Official Gazette RS 124/12, as given in the RHMZ RS report)

All figures by year and month

No data has arrived from this station since October 6, 2026 at 15:00

No reading for 26 hours.

We take the readings from the European Environment Agency (EEA), and no new values for this station are coming from there. The cause may lie with the station itself or with the data transmission.

This station is one of 6 stations in Republika Srpska from which no data has been arriving since October 6, 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: October 6, 2026 at 15:00
Measured then: NO₂ 19 µg/m³, O₃ 111.2 µg/m³, PM10 42.5 µg/m³, PM2.5 26.8 µg/m³, SO₂ 22.2 µg/m³

All outages of this station

Nearest station measuring now: Jajce - Harmani, Jajce, about 51 km away.

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

Go to that station

How the air is changing

Over the last seven days there was more PM10, PM2.5, NO₂, O₃, and SO₂ in the air than the week before.

  • PM10: average 39.3 µg/m³, week before 25.5 µg/m³
  • PM2.5: average 23.4 µg/m³, week before 14.9 µg/m³
  • NO₂: average 35.2 µg/m³, week before 26.1 µg/m³
  • O₃: average 42.3 µg/m³, week before 38.4 µg/m³
  • SO₂: average 14.1 µg/m³, week before 10.7 µg/m³

Last month there was more SO₂ and less PM10, PM2.5, and O₃ in the air than the month before.

  • PM10: average 22.8 µg/m³, month before 29.4 µg/m³
  • PM2.5: average 12.1 µg/m³, month before 15.4 µg/m³
  • NO₂: average 25.8 µg/m³, month before 27.7 µg/m³
  • O₃: average 48.1 µg/m³, month before 72.5 µg/m³
  • SO₂: average 9.2 µg/m³, month before 7.7 µg/m³

Show

Particulate matter PM10

no measurement

Now

too few readings

Last 24 hours

measured in 0 % of hours

39.3

Last 7 daysµg/m³

measured in 95 % of hours · provisional

26.5

Last 30 daysµg/m³

measured in 99 % of hours · provisional

49.9

Last 12 monthsµg/m³

measured in 96 % of hours · provisional

Days in 2026: PM10, daily average above 50 µg/m³

76 days above the limit. 3 days without any reading from the station.

1102031JanJan 1: 59 µg/m³, above the limitJan 7: 57 µg/m³, above the limitJan 8: 136 µg/m³, above the limitJan 9: 152 µg/m³, above the limitJan 10: 131 µg/m³, above the limitJan 11: 101 µg/m³, above the limitJan 12: 159 µg/m³, above the limitJan 13: 158 µg/m³, above the limitJan 14: 168 µg/m³, above the limitJan 15: 184 µg/m³, above the limitJan 16: 198 µg/m³, above the limitJan 17: 136 µg/m³, above the limitJan 18: 55 µg/m³, above the limitJan 19: 65 µg/m³, above the limitJan 20: 78 µg/m³, above the limitJan 21: 93 µg/m³, above the limitJan 22: 122 µg/m³, above the limitJan 23: 198 µg/m³, above the limitJan 24: 315 µg/m³, above the limitJan 25: 237 µg/m³, above the limitJan 26: 110 µg/m³, above the limitJan 27: 125 µg/m³, above the limitJan 28: 115 µg/m³, above the limitJan 29: 96 µg/m³, above the limitJan 30: 57 µg/m³, above the limitJan 31: 55 µg/m³, above the limitFebFeb 2: 53 µg/m³, above the limitFeb 3: 103 µg/m³, above the limitFeb 4: 137 µg/m³, above the limitFeb 5: 92 µg/m³, above the limitFeb 6: 102 µg/m³, above the limitFeb 7: 137 µg/m³, above the limitFeb 8: 79 µg/m³, above the limitFeb 9: 60 µg/m³, above the limitFeb 10: 63 µg/m³, above the limitFeb 11: 66 µg/m³, above the limitFeb 12: 116 µg/m³, above the limitFeb 14: 146 µg/m³, above the limitFeb 15: 75 µg/m³, above the limitFeb 16: 71 µg/m³, above the limitFeb 17: 69 µg/m³, above the limitFeb 18: 85 µg/m³, above the limitFeb 22: 102 µg/m³, above the limitFeb 23: 116 µg/m³, above the limitFeb 24: 112 µg/m³, above the limitFeb 25: 78 µg/m³, above the limitFeb 26: 104 µg/m³, above the limitFeb 27: 112 µg/m³, above the limitMarMar 1: no data from the stationMar 3: 84 µg/m³, above the limitMar 4: 119 µg/m³, above the limitMar 5: 84 µg/m³, above the limitMar 6: 80 µg/m³, above the limitMar 7: 93 µg/m³, above the limitMar 8: 81 µg/m³, above the limitMar 9: 97 µg/m³, above the limitMar 10: 92 µg/m³, above the limitMar 11: 77 µg/m³, above the limitMar 12: 76 µg/m³, above the limitMar 13: 56 µg/m³, above the limitMar 14: 74 µg/m³, above the limitMar 15: 62 µg/m³, above the limitMar 16: 71 µg/m³, above the limitMar 19: 79 µg/m³, above the limitMar 20: 74 µg/m³, above the limitMar 21: 60 µg/m³, above the limitMar 22: 66 µg/m³, above the limitMar 23: 56 µg/m³, above the limitMar 24: 50 µg/m³, above the limitMar 31: 71 µg/m³, above the limitAprApr 1: 55 µg/m³, above the limitApr 2: 72 µg/m³, above the limitApr 3: 51 µg/m³, above the limitApr 16: 57 µg/m³, above the limitMayMay 2: no data from the stationMay 3: no data from the stationJunJulAugAug 28: 80 µg/m³, above the limitAug 29: 70 µg/m³, above the limitSepOctOct 5: 51 µg/m³, above the limitNovDec
  • above the limit
  • below the limit
  • too few readings for the day
  • no data from the station
Days above the limit with values (76)
  1. Jan 1 59
  2. Jan 7 57
  3. Jan 8 136
  4. Jan 9 152
  5. Jan 10 131
  6. Jan 11 101
  7. Jan 12 159
  8. Jan 13 158
  9. Jan 14 168
  10. Jan 15 184
  11. Jan 16 198
  12. Jan 17 136
  13. Jan 18 55
  14. Jan 19 65
  15. Jan 20 78
  16. Jan 21 93
  17. Jan 22 122
  18. Jan 23 198
  19. Jan 24 315
  20. Jan 25 237
  21. Jan 26 110
  22. Jan 27 125
  23. Jan 28 115
  24. Jan 29 96
  25. Jan 30 57
  26. Jan 31 55
  27. Feb 2 53
  28. Feb 3 103
  29. Feb 4 137
  30. Feb 5 92
  31. Feb 6 102
  32. Feb 7 137
  33. Feb 8 79
  34. Feb 9 60
  35. Feb 10 63
  36. Feb 11 66
  37. Feb 12 116
  38. Feb 14 146
  39. Feb 15 75
  40. Feb 16 71
  41. Feb 17 69
  42. Feb 18 85
  43. Feb 22 102
  44. Feb 23 116
  45. Feb 24 112
  46. Feb 25 78
  47. Feb 26 104
  48. Feb 27 112
  49. Mar 3 84
  50. Mar 4 119
  51. Mar 5 84
  52. Mar 6 80
  53. Mar 7 93
  54. Mar 8 81
  55. Mar 9 97
  56. Mar 10 92
  57. Mar 11 77
  58. Mar 12 76
  59. Mar 13 56
  60. Mar 14 74
  61. Mar 15 62
  62. Mar 16 71
  63. Mar 19 79
  64. Mar 20 74
  65. Mar 21 60
  66. Mar 22 66
  67. Mar 23 56
  68. Mar 24 50
  69. Mar 31 71
  70. Apr 1 55
  71. Apr 2 72
  72. Apr 3 51
  73. Apr 16 57
  74. Aug 28 80
  75. Aug 29 70
  76. Oct 5 51

Values in µg/m³, limit 50 µg/m³.

Months of 2026

MonthDays above 50Highest dayNo readings
January26 above the number allowed3150
February22 above the number allowed1460
March21 above the number allowed1191
April4 above the number allowed720
May0292
June0410
July0400
August2 above the number allowed800
September0430
October up to yesterday1 above the number allowed510

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: PM10 in µg/m³highest 93 µg/m³, latest 42 µg/m³ (15:00)050100150ThuFriSatSunMonTueWedhighest 93latest 42 (15:00)
measuredmodel estimate, not countedday above the limit (daily average)
Last 7 days, every hour: PM10 in µg/m³
Values as a table
Hour toµg/m³Note
Wednesday, 10/7
16:0024model estimate, not counted
15:0024model estimate, not counted
14:0024model estimate, not counted
13:0024model estimate, not counted
12:0027model estimate, not counted
11:0026model estimate, not counted
10:0031model estimate, not counted
09:0032model estimate, not counted
08:0038model estimate, not counted
07:0043model estimate, not counted
06:0050model estimate, not counted
05:0059model estimate, not counted
04:0065model estimate, not counted
03:0071model estimate, not counted
02:0081model estimate, not counted
01:00132model estimate, not counted
Tuesday, 10/6
00:00132model estimate, not counted
23:00132model estimate, not counted
22:00132model estimate, not counted
21:00132model estimate, not counted
20:00132model estimate, not counted
19:00132model estimate, not counted
18:00132model estimate, not counted
17:00132model estimate, not counted
16:00132model estimate, not counted
15:0042.5
14:0036.3
13:0037.1
12:0048.8
11:0051.2
10:0045.3
09:0066.8
08:0061.7
07:0047.9
06:0034.4
05:0031
04:0035.9
03:0042.4
02:0047.9
01:0056
Monday, 10/5
00:0068.5
23:0076.6
22:0081.2
21:0093.4
20:0087.2
19:0091.2
18:0056.6
17:0037.4
16:0035.2
15:0028.2
14:0028.3
13:0029
12:0037.7
11:0039.9
10:0043.3
09:0062.1
08:0069
07:0041
06:0026.3
05:0029.9
04:0033.7
03:0041.1
02:0044.2
01:0042.3
Sunday, 10/4
00:0047.9
23:0059.7
22:0055.8
21:0061.5
20:0065.4
19:0057.6
18:0032.4
17:0024.3
16:0020.6
15:0019.2
14:0023
13:0020.7
12:0022.2
11:0024.1
10:0021.4
09:0025.7
08:0039.2
07:0027.6
06:0022
05:0025.1
04:0029.7
03:0036.4
02:0043.9
01:0054.2
Saturday, 10/3
00:0066
23:0064
22:0060.4
21:0075.9
20:0073.4
19:0040.3
18:0021.9
17:0020.3
16:0021.3
15:0023.6
14:0028.9
13:0029.3
12:0030.9
11:0030.9
10:0038.8
09:0040.8
08:0032.4
07:0031.5
06:0025.3
05:0023.2
04:0025.2
03:0029.8
02:0034.8
01:0044.4
Friday, 10/2
00:0051.4
23:0050.4
22:0075.5
21:0063.9
20:0071
19:0036.2
18:0022.9
17:0023
16:0027.2
15:0028.3
14:0030.7
13:0026.8
12:0031.5
11:0032
10:0041.4
09:0045.9
08:0038.5
07:0030.7
06:0022.2
05:0021.6
04:0022.5
03:0025.1
02:0032
01:0038.9
Thursday, 10/1
00:0044.2
23:0055.4
22:0056.3
21:0063.2
20:0066.3
19:0024.5
18:0018.4
17:0019.1
16:0022.9
15:0023.4
14:0027.9
13:0029.4
12:0026.1
11:0036.7
10:0038.1
09:0052.9
08:0047.7
07:0030.3
06:0023.3
05:0022.4
04:0024.4
03:0024.8
02:0029.3
01:0037.4
Wednesday, 9/30
00:0051.4
23:0053.8
22:0087.4
21:0078.3
20:0037.9
19:0025.9
Last 30 days, daily average: PM10 in µg/m³ · 1 day above the limithighest 51 µg/m³, latest 51 µg/m³02040609/99/169/239/30highest 51
day above the limittoo few readingslegal daily limit, 50 µg/m³
Last 30 days, daily average: PM10 in µg/m³ · 1 day above the limit
Values as a table
Dayµg/m³Note
Tue, 10/6too few readings
Mon, 10/551above the limit · provisional
Sun, 10/435.8provisional
Sat, 10/338.1provisional
Fri, 10/237.1provisional
Thu, 10/135.2provisional
Wed, 9/3034.4provisional
Tue, 9/2930.9provisional
Mon, 9/2833.3provisional
Sun, 9/2731.7provisional
Sat, 9/2625.3provisional
Fri, 9/2514.3provisional
Thu, 9/2418.8provisional
Wed, 9/2324.5provisional
Tue, 9/2220.8provisional
Mon, 9/2126provisional
Sun, 9/2023.7provisional
Sat, 9/1919.3provisional
Fri, 9/1817.9provisional
Thu, 9/1720.1provisional
Wed, 9/1621provisional
Tue, 9/1516provisional
Mon, 9/1417.6provisional
Sun, 9/1315.3provisional
Sat, 9/1216.1provisional
Fri, 9/1116.2provisional
Thu, 9/1024.8provisional
Wed, 9/943.4provisional
Tue, 9/825.8provisional
Mon, 9/722.1provisional
Last 12 months, monthly average: PM10 in µg/m³highest 115 µg/m³, latest 40 µg/m³050100150DecFebAprJunAugOcthighest 115latest 40
Last 12 monthsthis month so fara year earlierlegal annual limit, 40 µg/m³month with days without data from the station
Last 12 months, monthly average: PM10 in µg/m³
Values as a table
Monthµg/m³a year earlierNote
October 2026 so far40.114measured in 94 % of hours · provisional · year before: same days
September 202622.811.8measured in 100 % of hours · provisional
August 202629.412.4measured in 100 % of hours · provisional
July 202620.39.5measured in 100 % of hours · provisional
June 202621.613.5measured in 98 % of hours · provisional
May 202618.19.4measured in 87 % of hours · provisional · 2 days without data from the station
April 202635.319.5measured in 89 % of hours · provisional
March 202665.633.3measured in 95 % of hours · provisional · 1 day without data from the station
February 202686.474.5measured in 89 % of hours · provisional
January 2026114.670.3measured in 100 % of hours · provisional
December 2025110.473measured in 100 % of hours · verified
November 202545.964.7measured in 98 % of hours · verified

PM10 by year

Yardstick: limits in Republika Srpska (Uredba, Official Gazette RS 124/12, as given in the RHMZ RS report)

Measure2026*20252024
Days above 50 µg/m³ (allowed 35)76 above the number allowed80 above the number allowed≥ 81 above the number allowed
Annual average, µg/m³ (legal limit 40)45.7*36.438.7
Highest daily average, µg/m³315January 24336December 18179November 19
Highest hourly value, µg/m³682January 24566December 18450January 6
Hours measured95 %97 %90 %
Days without any reading from the station3425

* 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.

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.

The column for 2023 is shown on wider screens.

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 82 such days.
  • WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2026 there were 82 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
Jan 24, 2026provisional3156.3 ×
Jan 25, 2026provisional2374.7 ×
Jan 16, 2026provisional1984.0 ×
Jan 23, 2026provisional1984.0 ×
Jan 15, 2026provisional1843.7 ×

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: 9

6 outages, 221 hours in total in the last 12 months.

Timeline of outages from October 7, 2025 to today

FromToDuration
Oct 6, 2026 15:00still ongoing26 hours
May 21, 2026 15:00May 22, 2026 17:0026 hours
May 1, 2026 19:00May 4, 2026 13:003 days
Apr 26, 2026 10:00Apr 27, 2026 11:0025 hours
Feb 28, 2026 06:00Mar 2, 2026 12:002 days
Oct 19, 2025 12:00Oct 20, 2025 12:0024 hours

Calculated from the hourly values the EEA publishes. If late values arrive afterwards, an outage gets shorter or disappears.

Who is responsible

In Republika Srpska air quality is governed by the Air Protection Act (Official Gazette RS 124/11 and 46/17) and the Regulation on Air Quality Values (Official Gazette RS 124/12). The republic’s monitoring network is run by the Republic Hydrometeorological Institute (RHMZ RS), which publishes an air quality report every year.

We take the limit values from the RHMZ RS report for 2025, which cites the regulation. Unlike in the Federation of BiH, the hourly limit for nitrogen dioxide is 150 µg/m³, at most 18 times a year. As in the Federation, nitrogen dioxide also has a daily limit of 85 µg/m³ with no exceedance allowed. The regulation calls 500 µg/m³ of sulphur dioxide and 400 µg/m³ of nitrogen dioxide over three hours in a row a concentration dangerous to health.

We have not yet checked in the text of the law who in Republika Srpska must adopt a plan when a limit is exceeded, so we do not state it here.

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 Republic Hydrometeorological Institute of Republic of Srpska. 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 those of Republika Srpska (Uredba o vrijednostima kvaliteta vazduha, Official Gazette RS 124/12), as listed by RHMZ RS in its report for 2025. Unlike in the FBiH, the hourly limit for NO₂ is 150 µg/m³. 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 Banjaluka

samoEKO is a brand of samoLabs, Juelich.