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Air at the Ugljevik-TE station

Ugljevik, Republika Srpska

Network: Republic Hydrometeorological Institute of Republic of Srpska · Station code: BA0059A

This year, up to the last reading (September 17)

73 days

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

The unverified hourly values of PM10 at this station jump unusually strongly, so we do not compare this number with the allowed one.

Daily average for 73 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 September 17, 2026 at 10:00

No reading for 20 days.

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.

Last reading: September 17, 2026 at 10:00
Measured then: NO₂ 2.2 µg/m³

All outages of this station

Nearest station measuring now: Tuzla Trnovac, Tuzla, about 27 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
  • 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

Particulate matter PM10

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 19 % of hours · provisional

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

73 days above the limit. 19 days without any reading from the station.

1102031JanJan 1: 80 µg/m³, above the limitJan 2: 65 µg/m³, above the limitJan 3: 79 µg/m³, above the limitJan 4: 88 µg/m³, above the limitJan 5: 62 µg/m³, above the limitJan 6: 76 µg/m³, above the limitJan 7: 74 µg/m³, above the limitJan 8: 61 µg/m³, above the limitJan 9: 119 µg/m³, above the limitJan 10: 101 µg/m³, above the limitJan 11: 68 µg/m³, above the limitJan 13: 98 µg/m³, above the limitJan 14: 71 µg/m³, above the limitJan 15: 106 µg/m³, above the limitJan 16: 96 µg/m³, above the limitJan 17: 96 µg/m³, above the limitJan 18: 117 µg/m³, above the limitJan 19: 108 µg/m³, above the limitJan 20: 107 µg/m³, above the limitJan 21: 86 µg/m³, above the limitJan 22: 162 µg/m³, above the limitJan 23: 142 µg/m³, above the limitJan 24: 109 µg/m³, above the limitJan 25: 94 µg/m³, above the limitJan 26: 65 µg/m³, above the limitJan 27: 95 µg/m³, above the limitJan 28: 57 µg/m³, above the limitJan 29: 79 µg/m³, above the limitJan 30: 85 µg/m³, above the limitJan 31: 71 µg/m³, above the limitFebFeb 1: 72 µg/m³, above the limitFeb 2: 76 µg/m³, above the limitFeb 4: 82 µg/m³, above the limitFeb 5: 73 µg/m³, above the limitFeb 6: 92 µg/m³, above the limitFeb 7: 105 µg/m³, above the limitFeb 8: 90 µg/m³, above the limitFeb 9: 86 µg/m³, above the limitFeb 10: 53 µg/m³, above the limitFeb 11: 76 µg/m³, above the limitFeb 12: 62 µg/m³, above the limitFeb 13: 91 µg/m³, above the limitFeb 14: 76 µg/m³, above the limitFeb 15: 91 µg/m³, above the limitFeb 16: 56 µg/m³, above the limitFeb 17: 66 µg/m³, above the limitFeb 18: 67 µg/m³, above the limitFeb 20: 143 µg/m³, above the limitFeb 21: 87 µg/m³, above the limitFeb 22: 94 µg/m³, above the limitFeb 23: 94 µg/m³, above the limitFeb 24: 75 µg/m³, above the limitFeb 25: 69 µg/m³, above the limitFeb 26: 70 µg/m³, above the limitFeb 28: 90 µg/m³, above the limitMarMar 1: 100 µg/m³, above the limitMar 2: 75 µg/m³, above the limitMar 3: 111 µg/m³, above the limitMar 4: 110 µg/m³, above the limitMar 5: 59 µg/m³, above the limitMar 6: 81 µg/m³, above the limitMar 7: 65 µg/m³, above the limitMar 8: 81 µg/m³, above the limitMar 9: 94 µg/m³, above the limitMar 10: 105 µg/m³, above the limitMar 11: 69 µg/m³, above the limitMar 13: 114 µg/m³, above the limitMar 14: 78 µg/m³, above the limitMar 15: 63 µg/m³, above the limitMar 16: 117 µg/m³, above the limitMar 17: 85 µg/m³, above the limitMar 18: 98 µg/m³, above the limitMar 19: 93 µg/m³, above the limitAprMayJunJulAugSepSep 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 PM10 data in the EEA database
  • no data from the station
Days above the limit with values (73)
  1. Jan 1 80
  2. Jan 2 65
  3. Jan 3 79
  4. Jan 4 88
  5. Jan 5 62
  6. Jan 6 76
  7. Jan 7 74
  8. Jan 8 61
  9. Jan 9 119
  10. Jan 10 101
  11. Jan 11 68
  12. Jan 13 98
  13. Jan 14 71
  14. Jan 15 106
  15. Jan 16 96
  16. Jan 17 96
  17. Jan 18 117
  18. Jan 19 108
  19. Jan 20 107
  20. Jan 21 86
  21. Jan 22 162
  22. Jan 23 142
  23. Jan 24 109
  24. Jan 25 94
  25. Jan 26 65
  26. Jan 27 95
  27. Jan 28 57
  28. Jan 29 79
  29. Jan 30 85
  30. Jan 31 71
  31. Feb 1 72
  32. Feb 2 76
  33. Feb 4 82
  34. Feb 5 73
  35. Feb 6 92
  36. Feb 7 105
  37. Feb 8 90
  38. Feb 9 86
  39. Feb 10 53
  40. Feb 11 76
  41. Feb 12 62
  42. Feb 13 91
  43. Feb 14 76
  44. Feb 15 91
  45. Feb 16 56
  46. Feb 17 66
  47. Feb 18 67
  48. Feb 20 143
  49. Feb 21 87
  50. Feb 22 94
  51. Feb 23 94
  52. Feb 24 75
  53. Feb 25 69
  54. Feb 26 70
  55. Feb 28 90
  56. Mar 1 100
  57. Mar 2 75
  58. Mar 3 111
  59. Mar 4 110
  60. Mar 5 59
  61. Mar 6 81
  62. Mar 7 65
  63. Mar 8 81
  64. Mar 9 94
  65. Mar 10 105
  66. Mar 11 69
  67. Mar 13 114
  68. Mar 14 78
  69. Mar 15 63
  70. Mar 16 117
  71. Mar 17 85
  72. Mar 18 98
  73. Mar 19 93

Values in µg/m³, limit 50 µg/m³.

Months of 2026

MonthDays above 50Highest dayNo readings
January30 above the number allowed1620
February25 above the number allowed1430
March18 above the number allowed1170
April0
May0
June00
July0
August0
September13
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: PM10 in µg/m³
Last 30 days, daily average: PM10 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: PM10 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 measurement
Wed, 9/16no measurement
Tue, 9/15no measurement
Mon, 9/14no measurement
Sun, 9/13no measurement
Sat, 9/12no measurement
Fri, 9/11no measurement
Thu, 9/10no measurement
Wed, 9/9no measurement
Tue, 9/8no measurement
Mon, 9/7no measurement
Last 12 months, monthly average: PM10 in µg/m³highest 91 µg/m³, latest 83 µg/m³050100DecFebAprJunAugOcthighest 91latest 83
Last 12 monthsa 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 fartoo few readings6 days without data from the station
September 2026too few readings13 days without data from the station
August 2026too few readings
July 2026too few readings
June 2026too few readingsmeasured in 4 % of hours · provisional
May 2026too few readings
April 2026too few readings
March 2026too few readingsmeasured in 53 % of hours · provisional
February 202682.6measured in 84 % of hours · provisional
January 202690.6measured in 85 % of hours · provisional
December 2025too few readings31 days without data from the station
November 2025too few readings30 days without data from the station

PM10 by year

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

Measure2026*2023
Days above 50 µg/m³ (allowed 35)73³≥ 15²
Annual average, µg/m³ (legal limit 40)too fewtoo few
Highest daily average, µg/m³162January 22154January 8
Highest hourly value, µg/m³478June 24244January 8
Hours measured24 %15 %
Days without any reading from the station19231

* 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.

³ The unverified hourly values of PM10 in 2026 jump from hour to hour by 92 % of their average; in verified years at stations in BiH by at most about 28 %. We do not compare such a number with the allowed one.

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.

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 73 such days.
  • WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2026 there were 73 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 22, 2026provisional1623.2 ×
Feb 20, 2026provisional1432.9 ×
Jan 23, 2026provisional1422.8 ×
Jan 9, 2026provisional1192.4 ×
Jan 18, 2026provisional1172.3 ×

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: 21

1 outage, 492 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
Sep 17, 2026 10:00still ongoing20 days

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

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