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Air at the Slavonski Brod-1 station

Slavonski Brod, Croatia

Network: Državna mreža za trajno praćenje kvalitete zraka · Station code: HR0010A

This year, up to yesterday (October 6)

38 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: August 10, 2026, O₃ 149 µg/m³ as a daily average, 1.2 times the limit.

Daily average for 258 of 279 days · data for 2026 not yet finally verified · Yardstick: EU limits (Directive 2008/50/EC)

All figures by year and month

Moderate

Air now · Measured at 15:00

Latest values

Latest value: 15:00

Readings
PollutantValueLevel
NO₂2.3 µg/m³Good
O₃119.8 µg/m³Moderate
SO₂5.5 µg/m³Good

How the air is changing

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

  • NO₂: average 20 µg/m³, week before 11.7 µg/m³
  • O₃: average 51 µg/m³, week before 43.6 µg/m³
  • SO₂: average 7.2 µg/m³, week before 2.6 µg/m³

Last month there was less O₃ in the air than the month before.

  • NO₂: average 12.4 µg/m³, month before 11.7 µg/m³
  • O₃: average 54.8 µg/m³, month before 77.7 µg/m³
  • SO₂: average 3.6 µg/m³, month before 4.2 µg/m³

Show

Ozone O₃

119.8

Nowµg/m³

Measured at 15:00

36.1

Last 24 hoursµg/m³

measured in 79 % of hours · provisional

51

Last 7 daysµg/m³

measured in 98 % of hours · provisional

50.6

Last 30 daysµg/m³

measured in 94 % of hours · provisional

46.3

Last 12 monthsµg/m³

measured in 96 % of hours · provisional

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

38 days above the limit. 7 days without any reading from the station.

1102031JanFebMarMar 12: no data from the stationMar 13: no data from the stationMar 14: no data from the stationMar 15: no data from the stationMar 16: no data from the stationMar 17: no data from the stationMar 18: no data from the stationAprMayMay 26: 121 µg/m³, above the limitJunJun 9: 121 µg/m³, above the limitJun 20: 126 µg/m³, above the limitJun 21: 123 µg/m³, above the limitJun 26: 129 µg/m³, above the limitJun 27: 134 µg/m³, above the limitJun 28: 131 µg/m³, above the limitJun 29: 123 µg/m³, above the limitJun 30: 128 µg/m³, above the limitJulJul 1: 121 µg/m³, above the limitJul 17: 140 µg/m³, above the limitJul 18: 122 µg/m³, above the limitJul 27: 122 µg/m³, above the limitJul 29: 129 µg/m³, above the limitJul 30: 139 µg/m³, above the limitJul 31: 138 µg/m³, above the limitAugAug 1: 123 µg/m³, above the limitAug 3: 126 µg/m³, above the limitAug 4: 131 µg/m³, above the limitAug 5: 142 µg/m³, above the limitAug 6: 134 µg/m³, above the limitAug 7: 134 µg/m³, above the limitAug 8: 126 µg/m³, above the limitAug 9: 129 µg/m³, above the limitAug 10: 149 µg/m³, above the limitAug 11: 143 µg/m³, above the limitAug 12: 125 µg/m³, above the limitAug 15: 124 µg/m³, above the limitAug 17: 132 µg/m³, above the limitAug 19: 125 µg/m³, above the limitAug 20: 130 µg/m³, above the limitAug 21: 128 µg/m³, above the limitAug 26: 120 µg/m³, above the limitAug 27: 122 µg/m³, above the limitAug 31: 131 µg/m³, above the limitSepSep 3: 128 µg/m³, above the limitSep 8: 124 µg/m³, above the limitSep 9: 124 µg/m³, above the limitOctNovDec
  • above the limit
  • below the limit
  • too few readings for the day
  • no data from the station
Days above the limit with values (38)
  1. May 26 121
  2. Jun 9 121
  3. Jun 20 126
  4. Jun 21 123
  5. Jun 26 129
  6. Jun 27 134
  7. Jun 28 131
  8. Jun 29 123
  9. Jun 30 128
  10. Jul 1 121
  11. Jul 17 140
  12. Jul 18 122
  13. Jul 27 122
  14. Jul 29 129
  15. Jul 30 139
  16. Jul 31 138
  17. Aug 1 123
  18. Aug 3 126
  19. Aug 4 131
  20. Aug 5 142
  21. Aug 6 134
  22. Aug 7 134
  23. Aug 8 126
  24. Aug 9 129
  25. Aug 10 149
  26. Aug 11 143
  27. Aug 12 125
  28. Aug 15 124
  29. Aug 17 132
  30. Aug 19 125
  31. Aug 20 130
  32. Aug 21 128
  33. Aug 26 120
  34. Aug 27 122
  35. Aug 31 131
  36. Sep 3 128
  37. Sep 8 124
  38. Sep 9 124

Values in µg/m³, limit 120 µg/m³.

Months of 2026

MonthDays above 120Highest 8 hNo readings
January0760
February0840
March0997
April01190
May1 above the number allowed1210
June8 above the number allowed1340
July7 above the number allowed1400
August19 above the number allowed1490
September3 above the number allowed1280
October up to yesterday01110

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 136 µg/m³, latest 119 µg/m³ (14:00)0100200ThuFriSatSunMonTueWedlatest 119 (14:00)
measuredmodel estimate, not counted
Last 7 days, every hour: O₃ in µg/m³
Values as a table
Hour toµg/m³Note
Wednesday, 10/7
17:0089model estimate, not counted
16:0091model estimate, not counted
15:0093model estimate, not counted
14:00118.8
13:00108.9
12:0096.6
11:0083.9
10:0047.4
09:0011.6
08:000.6
06:003.6
05:004.4
04:009.1
03:0011
02:008.9
01:009.8
Tuesday, 10/6
00:0012.1
23:0035.6
22:0044.5
21:0044.9
20:0016.3
19:0018.3
18:00109.6
17:00135.7
16:00133.2
15:00128.4
14:00121.4
13:00111
12:0086.2
11:0065
10:0038.4
09:0017.3
08:004.9
07:002.6
06:000.6
05:001.9
04:002.5
03:000.4
02:004.7
01:001.6
Monday, 10/5
00:006.3
23:0019.2
22:0041.2
21:0026.8
20:0017
19:0012.7
18:0058.8
17:00105.1
16:00112.4
15:00114.8
14:00109.4
13:0095.9
12:0085.4
11:0068
10:0047
09:0021.5
08:001.8
07:002.8
05:002
04:0011.7
03:0011
02:006.7
01:0010.4
Sunday, 10/4
00:0016.9
23:0033.2
22:0035.6
21:0020.4
19:0057.2
18:00107.9
17:00115.6
16:00114.9
15:00104.7
14:00102.3
13:0099.3
12:0090.7
11:0069
10:0041.9
09:0019
08:004.8
07:002.7
06:007.7
05:008.4
04:0011.8
03:0017.4
02:0026.5
01:0054.4
Saturday, 10/3
00:0056.5
23:0068.9
22:0057.5
21:0041.8
20:0024.7
19:0066.1
18:00102.8
17:00109.9
16:00108.6
15:00104.5
14:00102.8
13:0098.4
12:0089.3
11:0067.2
10:0041.5
09:0015.1
08:000
07:000.5
06:000.3
05:003.3
04:002.8
03:0011.9
02:0012.6
01:0021
Friday, 10/2
00:0011
23:0028.1
22:0030.6
21:0012.3
20:0010.5
19:0027.6
18:0082.3
17:00100.7
16:00103.8
15:0098.6
14:0097.7
13:0089.8
12:0081.7
11:0071.1
10:0043
09:0018.9
08:0011.5
07:005.2
06:005.9
05:0025.2
04:0038.6
03:0038.1
02:0053
01:0058.3
Thursday, 10/1
00:0059.4
23:0072.9
22:0076.1
21:0077
20:0046.4
19:0069.5
18:0099.1
17:00102.3
16:0097.3
15:0096.7
14:0094
13:0088.9
12:0079.3
11:0069
10:0059.6
09:0042.6
08:0026
07:0031.6
06:0030.6
05:0038.8
04:0049.2
03:0048.5
02:0055.9
01:0053.7
Wednesday, 9/30
00:0055.1
23:0063.3
22:0076.9
21:0075.4
20:0052.6
Last 30 days, highest 8-hour average of the day: O₃ in µg/m³ · 2 days above the limithighest 124 µg/m³, latest 111 µg/m³0501001509/99/169/239/30highest 124latest 111
day above the limittoo few readingstarget value, 120 µg/m³
Last 30 days, highest 8-hour average of the day: O₃ in µg/m³ · 2 days above the limit
Values as a table
Dayµg/m³Note
Tue, 10/6111.3provisional
Mon, 10/593.7provisional
Sun, 10/4100.6provisional
Sat, 10/397.9provisional
Fri, 10/290.7provisional
Thu, 10/190.9provisional
Wed, 9/3090.8provisional
Tue, 9/2989.9provisional
Mon, 9/28100.3provisional
Sun, 9/2794.9provisional
Sat, 9/2685.6provisional
Fri, 9/2565.6provisional
Thu, 9/24too few readings
Wed, 9/2367.4provisional
Tue, 9/2276.7provisional
Mon, 9/2178.2provisional
Sun, 9/20too few readings
Sat, 9/19100.1provisional
Fri, 9/1897.3provisional
Thu, 9/17102.2provisional
Wed, 9/16too few readings
Tue, 9/15too few readings
Mon, 9/1485.1provisional
Sun, 9/13too few readings
Sat, 9/1286.6provisional
Fri, 9/1146.1provisional
Thu, 9/1078.4provisional
Wed, 9/9123.8above the limit · provisional
Tue, 9/8124.4above the limit · provisional
Mon, 9/7111.7provisional
Last 12 months, monthly average: O₃ in µg/m³highest 78 µg/m³, latest 51 µg/m³050100DecFebAprJunAugOcthighest 78latest 51
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 far50.742.5measured in 99 % of hours · provisional · year before: same days
September 202654.8too few readingsmeasured in 94 % of hours · provisional
August 202677.7measured in 100 % of hours · provisional
July 202667measured in 100 % of hours · provisional
June 202661.1measured in 95 % of hours · provisional
May 202664.6too few readingsmeasured in 99 % of hours · provisional
April 202659.4too few readingsmeasured in 99 % of hours · provisional
March 2026too few readings41.3measured in 73 % of hours · provisional · 7 days without data from the station
February 202631.331.6measured in 97 % of hours · provisional
January 202631too few readingsmeasured in 98 % of hours · provisional
December 20251021.5measured in 98 % of hours · verified
November 202517.422.5measured in 99 % of hours · verified

O₃ by year

Yardstick: EU limits (Directive 2008/50/EC)

Measure2026*20252024
Days with 8-hour average above 120 µg/m³ (target value 25)380²≥ 24²
Annual average, µg/m³55.6*too few45.4
Highest 8-hour average, µg/m³149August 10114May 15155August 17
Hours measured95 %57 %90 %
Days without any reading from the station711613

* 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.

¹ Fewer than 90 % of the hours were measured, so we do not compare this average with the limit.

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 10, 2026provisional1491.2 ×
Aug 11, 2026provisional1431.2 ×
Aug 5, 2026provisional1421.2 ×
Jul 17, 2026provisional1401.2 ×
Jul 30, 2026provisional1391.2 ×

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: 9

2 outages, 222 hours in total in the last 12 months.

Timeline of outages from October 7, 2025 to today

FromToDuration
Jun 4, 2026 09:00Jun 5, 2026 11:0026 hours
Mar 11, 2026 09:00Mar 19, 2026 13:008 days

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

Where the data comes from

Measured by Državna mreža za trajno praćenje kvalitete zraka. 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 EU limits come from Directive 2008/50/EC. Here they serve as a yardstick for comparison. 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.