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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

Poor

Air now · Measured at 16:00

Latest values

Latest value: 16:00

Readings
PollutantValueLevel
NO₂2.2 µg/m³Good
O₃120.7 µg/m³Poor
SO₂5.4 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

120.7

Nowµg/m³

Measured at 16:00

41.5

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

24 days above the limit. 13 days without any reading from the station.

1102031JanFebMarMar 22: no data from the stationMar 23: no data from the stationMar 24: no data from the stationMar 25: no data from the stationMar 26: no data from the stationMar 27: no data from the stationMar 28: no data from the stationMar 29: no data from the stationMar 30: no data from the stationMar 31: no data from the stationAprApr 1: no data from the stationApr 2: no data from the stationApr 3: no data from the stationMayMay 28: 121 µg/m³, above the limitJunJun 8: 127 µg/m³, above the limitJulJul 8: 122 µg/m³, above the limitJul 10: 138 µg/m³, above the limitJul 11: 126 µg/m³, above the limitJul 12: 130 µg/m³, above the limitJul 27: 123 µg/m³, above the limitAugAug 1: 139 µg/m³, above the limitAug 13: 134 µg/m³, above the limitAug 14: 142 µg/m³, above the limitAug 15: 132 µg/m³, above the limitAug 16: 141 µg/m³, above the limitAug 17: 155 µg/m³, above the limitAug 18: 127 µg/m³, above the limitAug 19: 122 µg/m³, above the limitAug 23: 136 µg/m³, above the limitAug 24: 151 µg/m³, above the limitAug 25: 142 µg/m³, above the limitAug 29: 125 µg/m³, above the limitSepSep 1: 120 µg/m³, above the limitSep 3: 137 µg/m³, above the limitSep 4: 132 µg/m³, above the limitSep 5: 139 µg/m³, above the limitSep 7: 140 µg/m³, above the limitOctNovDec
  • above the limit
  • below the limit
  • too few readings for the day
  • no O₃ data in the EEA database
  • no data from the station
Days above the limit with values (24)
  1. May 28 121
  2. Jun 8 127
  3. Jul 8 122
  4. Jul 10 138
  5. Jul 11 126
  6. Jul 12 130
  7. Jul 27 123
  8. Aug 1 139
  9. Aug 13 134
  10. Aug 14 142
  11. Aug 15 132
  12. Aug 16 141
  13. Aug 17 155
  14. Aug 18 127
  15. Aug 19 122
  16. Aug 23 136
  17. Aug 24 151
  18. Aug 25 142
  19. Aug 29 125
  20. Sep 1 120
  21. Sep 3 137
  22. Sep 4 132
  23. Sep 5 139
  24. Sep 7 140

Values in µg/m³, limit 120 µg/m³.

Months of 2024

MonthDays above 120Highest 8 hNo readings
January0710
February0830
March08710
April01083
May1 above the number allowed1210
June1 above the number allowed1270
July5 above the number allowed1380
August12 above the number allowed1550
September5 above the number allowed1400
October0740
November0570
December0590

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 120 µg/m³ (15:00)0100200ThuFriSatSunMonTueWedlatest 120 (15:00)
measuredmodel estimate, not counted
Last 7 days, every hour: O₃ in µg/m³
Values as a table
Hour toµg/m³Note
Wednesday, 10/7
18:0077model estimate, not counted
17:0089model estimate, not counted
16:0091model estimate, not counted
15:00119.8
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
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 2024

DayHighest 8 hTimes the limit
Aug 17, 20241551.3 ×
Aug 24, 20241511.3 ×
Aug 25, 20241421.2 ×
Aug 14, 20241421.2 ×
Aug 16, 20241411.2 ×

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.