Air at the Karlovac-1 station
Karlovac, Croatia
Network: Državna mreža za trajno praćenje kvalitete zraka · Station code: HR0028A
This year, up to yesterday (October 6)
22 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.
In 2025: 5 days above the limit, the target value allows 25 as a three-year average.
Worst day: August 6, 2026, O₃ 138 µg/m³ as a daily average, 1.2 times the limit.
Daily average for 269 of 279 days · data for 2026 not yet finally verified · Yardstick: EU limits (Directive 2008/50/EC)
Moderate
Air now · Measured at 19:00
Latest values
Latest value: 19:00
| Pollutant | Value | Level |
|---|---|---|
| NO₂ | 6.5 µg/m³ | Good |
| O₃ | 102 µg/m³ | Moderate |
How the air is changing
Over the last seven days there was more NO₂ and O₃ in the air than the week before.
- NO₂: average 7.6 µg/m³, week before 5.7 µg/m³
- O₃: average 37.4 µg/m³, week before 31.5 µg/m³
Last month there was less O₃ in the air than the month before.
- NO₂: average 6 µg/m³, month before 6.7 µg/m³
- O₃: average 41.2 µg/m³, month before 67.7 µg/m³
Show
Nitrogen dioxide NO₂
6.5
Nowµg/m³
Measured at 19:00
6.5
Last 24 hoursµg/m³
measured in 83 % of hours · provisional
7.6
Last 7 daysµg/m³
measured in 100 % of hours · provisional
6.3
Last 30 daysµg/m³
measured in 100 % of hours · provisional
7.4
Last 12 monthsµg/m³
measured in 94 % of hours · provisional
Days in 2024: NO₂, at least one hour above 200 µg/m³
No measured day above the limit. 9 days without any reading from the station.
- above the limit
- below the limit
- too few readings for the day
- no NO₂ data in the EEA database
- no data from the station
Months of 2024
| Month | Days with an hour above 200 | Hours above 200 | Highest day | No readings |
|---|---|---|---|---|
| January | 0 | 0 | 33 | 0 |
| February | 0 | 0 | 27 | 0 |
| March | 0 | 0 | 21 | 0 |
| April | 0 | 0 | 10 | 0 |
| May | 0 | 0 | 9 | 0 |
| June | 0 | 0 | 9 | 0 |
| July | 0 | 0 | 7 | 0 |
| August | 0 | 0 | 10 | 0 |
| September | 0 | 0 | 8 | 2 |
| October | 0 | |||
| November | 0 | |||
| December | 0 | 0 | 23 | 7 |
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.
Values as a table
| Hour to | µg/m³ | Note |
|---|---|---|
| Wednesday, 10/7 | ||
| 21:00 | 12 | model estimate, not counted |
| 20:00 | 13 | model estimate, not counted |
| 19:00 | 12 | model estimate, not counted |
| 18:00 | 4.6 | |
| 17:00 | 3.2 | |
| 16:00 | 2.4 | |
| 15:00 | 2.2 | |
| 14:00 | 1.5 | |
| 13:00 | 5.5 | |
| 12:00 | 7.9 | |
| 11:00 | 12.3 | |
| 10:00 | 14.3 | |
| 09:00 | 10.4 | |
| 08:00 | 10.3 | |
| 07:00 | 5.1 | |
| 06:00 | 1.6 | |
| 05:00 | 2.3 | |
| 04:00 | 3.5 | |
| 03:00 | 4 | |
| 02:00 | 6.1 | |
| 01:00 | 7.2 | |
| Tuesday, 10/6 | ||
| 00:00 | 10.9 | |
| 23:00 | 15.6 | |
| 22:00 | 18.2 | |
| 21:00 | 24.1 | |
| 20:00 | 23.3 | |
| 19:00 | 10.2 | |
| 18:00 | 6.9 | |
| 17:00 | 6.7 | |
| 16:00 | 3.4 | |
| 15:00 | 2.5 | |
| 14:00 | 2.9 | |
| 13:00 | 5.1 | |
| 12:00 | 13.6 | |
| 11:00 | 20 | |
| 10:00 | 14.9 | |
| 09:00 | 1.7 | |
| 08:00 | 3.5 | |
| 07:00 | 4.2 | |
| 06:00 | 2.8 | |
| 05:00 | 2.4 | |
| 04:00 | 3 | |
| 03:00 | 4.3 | |
| 02:00 | 6.3 | |
| 01:00 | 10.5 | |
| Monday, 10/5 | ||
| 00:00 | 14.4 | |
| 23:00 | 19.6 | |
| 22:00 | 26.3 | |
| 21:00 | 16.9 | |
| 20:00 | 11.6 | |
| 19:00 | 8.5 | |
| 18:00 | 2.1 | |
| 17:00 | 2 | |
| 16:00 | 2 | |
| 15:00 | 3.2 | |
| 14:00 | 3.7 | |
| 13:00 | 6.1 | |
| 12:00 | 19.7 | |
| 11:00 | 14.9 | |
| 10:00 | 8.2 | |
| 09:00 | 1.9 | |
| 08:00 | 4 | |
| 07:00 | 3.9 | |
| 06:00 | 3.1 | |
| 05:00 | 3.1 | |
| 04:00 | 3.1 | |
| 03:00 | 3.9 | |
| 02:00 | 6.2 | |
| 01:00 | 9.6 | |
| Sunday, 10/4 | ||
| 00:00 | 12.3 | |
| 23:00 | 19.9 | |
| 22:00 | 21.9 | |
| 21:00 | 12.3 | |
| 20:00 | 10.5 | |
| 19:00 | 3.6 | |
| 18:00 | 1.6 | |
| 17:00 | 1.1 | |
| 16:00 | 1.3 | |
| 15:00 | 1.3 | |
| 14:00 | 1.8 | |
| 13:00 | 1.8 | |
| 12:00 | 3 | |
| 11:00 | 8.1 | |
| 10:00 | 4.5 | |
| 09:00 | 2.8 | |
| 08:00 | 2.4 | |
| 07:00 | 2.4 | |
| 06:00 | 2 | |
| 05:00 | 2.7 | |
| 04:00 | 4.7 | |
| 03:00 | 6.4 | |
| 02:00 | 7.7 | |
| 01:00 | 10.1 | |
| Saturday, 10/3 | ||
| 00:00 | 11.8 | |
| 23:00 | 20.6 | |
| 22:00 | 21.3 | |
| 21:00 | 15.2 | |
| 20:00 | 6.8 | |
| 19:00 | 4 | |
| 18:00 | 1.9 | |
| 17:00 | 1 | |
| 16:00 | 1.2 | |
| 15:00 | 1.3 | |
| 14:00 | 2 | |
| 13:00 | 3.2 | |
| 12:00 | 8.4 | |
| 11:00 | 17.6 | |
| 10:00 | 15.1 | |
| 09:00 | 7.6 | |
| 08:00 | 6.2 | |
| 07:00 | 5.6 | |
| 06:00 | 3.2 | |
| 05:00 | 4.2 | |
| 04:00 | 5 | |
| 03:00 | 6.9 | |
| 02:00 | 7.6 | |
| 01:00 | 12.3 | |
| Friday, 10/2 | ||
| 00:00 | 17.6 | |
| 23:00 | 21.6 | |
| 22:00 | 28.4 | |
| 21:00 | 27.1 | |
| 20:00 | 7.4 | |
| 19:00 | 3.4 | |
| 18:00 | 1.7 | |
| 17:00 | 1.2 | |
| 16:00 | 1.8 | |
| 15:00 | 2 | |
| 14:00 | 2.4 | |
| 13:00 | 3.7 | |
| 12:00 | 5.3 | |
| 11:00 | 12.6 | |
| 10:00 | 11.5 | |
| 09:00 | 11.8 | |
| 08:00 | 8.3 | |
| 07:00 | 6.4 | |
| 06:00 | 3.6 | |
| 05:00 | 3 | |
| 04:00 | 3.1 | |
| 03:00 | 4.2 | |
| 02:00 | 5.7 | |
| 01:00 | 9.4 | |
| Thursday, 10/1 | ||
| 00:00 | 13.2 | |
| 23:00 | 13.2 | |
| 22:00 | 22.5 | |
| 21:00 | 19.2 | |
| 20:00 | 6.3 | |
| 19:00 | 1.8 | |
| 18:00 | 1.5 | |
| 17:00 | 1 | |
| 16:00 | 0.8 | |
| 15:00 | 0.8 | |
| 14:00 | 1.2 | |
| 13:00 | 1.8 | |
| 12:00 | 3.8 | |
| 11:00 | 15.3 | |
| 10:00 | 18.5 | |
| 09:00 | 9.3 | |
| 08:00 | 6.3 | |
| 07:00 | 4.4 | |
| 06:00 | 3.2 | |
| 05:00 | 3.2 | |
| 04:00 | 3.3 | |
| 03:00 | 4.6 | |
| 02:00 | 6.3 | |
| 01:00 | 9.7 | |
| Wednesday, 9/30 | ||
| 00:00 | 10.5 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 9 | provisional |
| Mon, 10/5 | 8.3 | provisional |
| Sun, 10/4 | 6.1 | provisional |
| Sat, 10/3 | 7.9 | provisional |
| Fri, 10/2 | 8.5 | provisional |
| Thu, 10/1 | 7.1 | provisional |
| Wed, 9/30 | 6.3 | provisional |
| Tue, 9/29 | 5.6 | provisional |
| Mon, 9/28 | 6 | provisional |
| Sun, 9/27 | 4.3 | provisional |
| Sat, 9/26 | 4.1 | provisional |
| Fri, 9/25 | 5.6 | provisional |
| Thu, 9/24 | 8.3 | provisional |
| Wed, 9/23 | 6 | provisional |
| Tue, 9/22 | 6.1 | provisional |
| Mon, 9/21 | 4.5 | provisional |
| Sun, 9/20 | 3.7 | provisional |
| Sat, 9/19 | 4.9 | provisional |
| Fri, 9/18 | 5.7 | provisional |
| Thu, 9/17 | 7.4 | provisional |
| Wed, 9/16 | 6.3 | provisional |
| Tue, 9/15 | 5.4 | provisional |
| Mon, 9/14 | 8 | provisional |
| Sun, 9/13 | 4.8 | provisional |
| Sat, 9/12 | 4.6 | provisional |
| Fri, 9/11 | 3 | provisional |
| Thu, 9/10 | 6.1 | provisional |
| Wed, 9/9 | 8.3 | provisional |
| Tue, 9/8 | 7.5 | provisional |
| Mon, 9/7 | 8.6 | provisional |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 7.8 | 6.6 | measured in 100 % of hours · provisional · year before: same days |
| September 2026 | 6 | 4.9 | measured in 100 % of hours · provisional |
| August 2026 | 6.7 | 5.6 | measured in 99 % of hours · provisional |
| July 2026 | 4.7 | 6.2 | measured in 98 % of hours · provisional |
| June 2026 | 3.4 | 5 | measured in 94 % of hours · provisional |
| May 2026 | 4.3 | 5 | measured in 99 % of hours · provisional |
| April 2026 | 6.3 | 7.4 | measured in 100 % of hours · provisional |
| March 2026 | 9.7 | 9.8 | measured in 100 % of hours · provisional |
| February 2026 | 10.3 | 15.8 | measured in 100 % of hours · provisional |
| January 2026 | 14.4 | 8.6 | measured in 100 % of hours · provisional |
| December 2025 | 7.7 | too few readings | measured in 99 % of hours · verified |
| November 2025 | 7.2 | measured in 99 % of hours · verified |
NO₂ by year
Yardstick: EU limits (Directive 2008/50/EC)
| Measure | 2026* | 2025 | 2024 |
|---|---|---|---|
| Hours above 200 µg/m³ (allowed 18) | 0 | 0 | 0² |
| Hours above 400 µg/m³, three hours in a row (alert threshold) | 0 | 0 | 0 |
| Annual average, µg/m³ (EU limit 40) | 7.4* | 7.4 | too few |
| Highest daily average, µg/m³ | 51January 13 | 28February 21 | 33January 24 |
| Highest hourly value, µg/m³ | 119January 13 | 81February 21 | 80January 22 |
| Hours measured | 99 % | 93 % | 77 % |
| Days without any reading from the station | 0 | 5 | 9 |
* 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.
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.
There is no allowed number for the warning and alert thresholds: every such hour or day is in red.
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 50 µg/m³, 18 days allowed. In 2024 there were 0 such days.
- WHO 2021: daily 25 µg/m³, at most three to four days a year. In 2024 there were 4 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.
Ozone O₃
102
Nowµg/m³
Measured at 19:00
41.3
Last 24 hoursµg/m³
measured in 83 % of hours · provisional
37.4
Last 7 daysµg/m³
measured in 100 % of hours · provisional
35.4
Last 30 daysµg/m³
measured in 100 % of hours · provisional
39
Last 12 monthsµg/m³
measured in 98 % of hours · provisional
Days in 2024: O₃, 8-hour average above 120 µg/m³
1 day above the limit. 9 days without any reading from the station.
- 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 (1)
- Aug 28 121
Values in µg/m³, limit 120 µg/m³.
Months of 2024
| Month | Days above 120 | Highest 8 h | No readings |
|---|---|---|---|
| January | 0 | 71 | 0 |
| February | 0 | 92 | 0 |
| March | 0 | 104 | 0 |
| April | 0 | 108 | 0 |
| May | 0 | 111 | 0 |
| June | 0 | 106 | 0 |
| July | 0 | 116 | 0 |
| August | 1 above the number allowed | 121 | 0 |
| September | 0 | 111 | 2 |
| October | 0 | 81 | 0 |
| November | 0 | 61 | 0 |
| December | 0 | 68 | 7 |
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.
Values as a table
| Hour to | µg/m³ | Note |
|---|---|---|
| Wednesday, 10/7 | ||
| 21:00 | 48 | model estimate, not counted |
| 20:00 | 50 | model estimate, not counted |
| 19:00 | 52 | model estimate, not counted |
| 18:00 | 108.2 | |
| 17:00 | 110.8 | |
| 16:00 | 113.9 | |
| 15:00 | 109.2 | |
| 14:00 | 101 | |
| 13:00 | 83.6 | |
| 12:00 | 65.6 | |
| 11:00 | 41.9 | |
| 10:00 | 14.8 | |
| 09:00 | 2.8 | |
| 08:00 | 2.1 | |
| 07:00 | 4.5 | |
| 06:00 | 6.9 | |
| 05:00 | 8.9 | |
| 04:00 | 6.6 | |
| 03:00 | 6.3 | |
| 02:00 | 8.4 | |
| 01:00 | 8.7 | |
| Tuesday, 10/6 | ||
| 00:00 | 8.9 | |
| 23:00 | 12.2 | |
| 22:00 | 12.7 | |
| 21:00 | 15.8 | |
| 20:00 | 23.2 | |
| 19:00 | 50.5 | |
| 18:00 | 58.1 | |
| 17:00 | 97.4 | |
| 16:00 | 117 | |
| 15:00 | 114.1 | |
| 14:00 | 108.5 | |
| 13:00 | 88.8 | |
| 12:00 | 54.2 | |
| 11:00 | 13.5 | |
| 10:00 | 3.3 | |
| 09:00 | 2.3 | |
| 08:00 | 1.8 | |
| 07:00 | 2.6 | |
| 06:00 | 2.8 | |
| 05:00 | 3.5 | |
| 04:00 | 5.5 | |
| 03:00 | 6.3 | |
| 02:00 | 4 | |
| 01:00 | 4.2 | |
| Monday, 10/5 | ||
| 00:00 | 5.3 | |
| 23:00 | 5.5 | |
| 22:00 | 3.3 | |
| 21:00 | 19.9 | |
| 20:00 | 44.8 | |
| 19:00 | 64 | |
| 18:00 | 95.6 | |
| 17:00 | 101.9 | |
| 16:00 | 102.1 | |
| 15:00 | 95.3 | |
| 14:00 | 93.7 | |
| 13:00 | 82.1 | |
| 12:00 | 39.3 | |
| 11:00 | 18.4 | |
| 10:00 | 10.8 | |
| 09:00 | 3.5 | |
| 08:00 | 2.4 | |
| 07:00 | 3.3 | |
| 06:00 | 5.5 | |
| 05:00 | 6 | |
| 04:00 | 6.5 | |
| 03:00 | 7.6 | |
| 02:00 | 8.5 | |
| 01:00 | 8.5 | |
| Sunday, 10/4 | ||
| 00:00 | 10.6 | |
| 23:00 | 9.9 | |
| 22:00 | 11 | |
| 21:00 | 31 | |
| 20:00 | 52.5 | |
| 19:00 | 84.6 | |
| 18:00 | 101.2 | |
| 17:00 | 114.4 | |
| 16:00 | 111.7 | |
| 15:00 | 107 | |
| 14:00 | 97.9 | |
| 13:00 | 89.8 | |
| 12:00 | 75.6 | |
| 11:00 | 35.2 | |
| 10:00 | 13.3 | |
| 09:00 | 5.9 | |
| 08:00 | 4.7 | |
| 07:00 | 4.6 | |
| 06:00 | 7.2 | |
| 05:00 | 9.3 | |
| 04:00 | 6.1 | |
| 03:00 | 5.8 | |
| 02:00 | 6.5 | |
| 01:00 | 7 | |
| Saturday, 10/3 | ||
| 00:00 | 10.1 | |
| 23:00 | 8.9 | |
| 22:00 | 10 | |
| 21:00 | 26 | |
| 20:00 | 53.6 | |
| 19:00 | 78.3 | |
| 18:00 | 108.1 | |
| 17:00 | 113 | |
| 16:00 | 110.1 | |
| 15:00 | 108.7 | |
| 14:00 | 102.6 | |
| 13:00 | 90.9 | |
| 12:00 | 65.4 | |
| 11:00 | 40.6 | |
| 10:00 | 7.2 | |
| 09:00 | 3.3 | |
| 08:00 | 2.8 | |
| 07:00 | 3.9 | |
| 06:00 | 5.2 | |
| 05:00 | 5.6 | |
| 04:00 | 4.6 | |
| 03:00 | 8.2 | |
| 02:00 | 7 | |
| 01:00 | 5.7 | |
| Friday, 10/2 | ||
| 00:00 | 3.6 | |
| 23:00 | 5.8 | |
| 22:00 | 7.7 | |
| 21:00 | 17.9 | |
| 20:00 | 59.7 | |
| 19:00 | 77.1 | |
| 18:00 | 102.3 | |
| 17:00 | 105.2 | |
| 16:00 | 103.7 | |
| 15:00 | 98.6 | |
| 14:00 | 88.8 | |
| 13:00 | 78.6 | |
| 12:00 | 65.1 | |
| 11:00 | 40.2 | |
| 10:00 | 16.6 | |
| 09:00 | 4.7 | |
| 08:00 | 1.8 | |
| 07:00 | 2.3 | |
| 06:00 | 5.1 | |
| 05:00 | 4.9 | |
| 04:00 | 4.5 | |
| 03:00 | 5.4 | |
| 02:00 | 6.2 | |
| 01:00 | 7.7 | |
| Thursday, 10/1 | ||
| 00:00 | 4.9 | |
| 23:00 | 9.6 | |
| 22:00 | 11.5 | |
| 21:00 | 20.7 | |
| 20:00 | 50.4 | |
| 19:00 | 76.8 | |
| 18:00 | 96.6 | |
| 17:00 | 100.2 | |
| 16:00 | 101.1 | |
| 15:00 | 98.7 | |
| 14:00 | 94.2 | |
| 13:00 | 87.7 | |
| 12:00 | 74.2 | |
| 11:00 | 42.8 | |
| 10:00 | 11.7 | |
| 09:00 | 2.2 | |
| 08:00 | 1.7 | |
| 07:00 | 1.6 | |
| 06:00 | 2.2 | |
| 05:00 | 2.7 | |
| 04:00 | 2.6 | |
| 03:00 | 2.3 | |
| 02:00 | 2.8 | |
| 01:00 | 2.9 | |
| Wednesday, 9/30 | ||
| 00:00 | 4.2 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Tue, 10/6 | 86.1 | provisional |
| Mon, 10/5 | 84.9 | provisional |
| Sun, 10/4 | 97.8 | provisional |
| Sat, 10/3 | 97.1 | provisional |
| Fri, 10/2 | 89.9 | provisional |
| Thu, 10/1 | 91.2 | provisional |
| Wed, 9/30 | 84.9 | provisional |
| Tue, 9/29 | 93 | provisional |
| Mon, 9/28 | 82 | provisional |
| Sun, 9/27 | 79 | provisional |
| Sat, 9/26 | 77.8 | provisional |
| Fri, 9/25 | 66.4 | provisional |
| Thu, 9/24 | 48.5 | provisional |
| Wed, 9/23 | 74.1 | provisional |
| Tue, 9/22 | 67.7 | provisional |
| Mon, 9/21 | 68 | provisional |
| Sun, 9/20 | 76.2 | provisional |
| Sat, 9/19 | 69.3 | provisional |
| Fri, 9/18 | 63.3 | provisional |
| Thu, 9/17 | 47.7 | provisional |
| Wed, 9/16 | 86.4 | provisional |
| Tue, 9/15 | 79.3 | provisional |
| Mon, 9/14 | 76.6 | provisional |
| Sun, 9/13 | 97.1 | provisional |
| Sat, 9/12 | 81.2 | provisional |
| Fri, 9/11 | 49.9 | provisional |
| Thu, 9/10 | 46.7 | provisional |
| Wed, 9/9 | 94.2 | provisional |
| Tue, 9/8 | 112.9 | provisional |
| Mon, 9/7 | 99 | provisional |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 37.8 | 34.8 | measured in 100 % of hours · provisional · year before: same days |
| September 2026 | 41.2 | 24.7 | measured in 100 % of hours · provisional |
| August 2026 | 67.7 | 39 | measured in 99 % of hours · provisional |
| July 2026 | 62.9 | too few readings | measured in 100 % of hours · provisional |
| June 2026 | 43.1 | 64.5 | measured in 96 % of hours · provisional |
| May 2026 | 54.5 | 53.2 | measured in 99 % of hours · provisional |
| April 2026 | 50.9 | 53 | measured in 79 % of hours · provisional |
| March 2026 | 46.3 | too few readings | measured in 100 % of hours · provisional |
| February 2026 | 23.7 | 34.4 | measured in 100 % of hours · provisional |
| January 2026 | 23.4 | 43.1 | measured in 100 % of hours · provisional |
| December 2025 | 7.7 | too few readings | measured in 100 % of hours · verified |
| November 2025 | 24.4 | 22.9 | measured in 100 % of hours · verified |
O₃ by year
Yardstick: EU limits (Directive 2008/50/EC)
| Measure | 2026* | 2025 | 2024 |
|---|---|---|---|
| Days with 8-hour average above 120 µg/m³ (target value 25) | 22 | 5 | ≥ 1² |
| Annual average, µg/m³ | 45.9* | 38.1 | 39.5 |
| Highest 8-hour average, µg/m³ | 138August 6 | 128May 3 | 121August 28 |
| Hours measured | 97 % | 92 % | 92 % |
| Days without any reading from the station | 0 | 5 | 9 |
* 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.
■ 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
| Day | Highest 8 h | Times the limit |
|---|---|---|
| Aug 28, 2024 | 121 | 1.0 × |
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: 1
1 outage, 25 hours in total in the last 12 months.
Timeline of outages from October 7, 2025 to today
| From | To | Duration |
|---|---|---|
| Jun 4, 2026 09:00 | Jun 5, 2026 10:00 | 25 hours |
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.
samoEKO is a brand of samoLabs, Juelich.