Air at the Krvavec station
Cerklje na Gorenjskem, Slovenia
Network: Slovenian Environment Agency · Station code: SI0032R
This year, up to yesterday (October 7)
64 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: 45 days above the limit, the target value allows 25 as a three-year average.
Worst day: August 6, 2026, O₃ 156 µg/m³ as a daily average, 1.3 times the limit.
Daily average for 277 of 280 days · data for 2026 not yet finally verified · Yardstick: EU limits (Directive 2008/50/EC)
Moderate
Air now · Measured at 00:00
Latest values
Latest value: 00:00
| Pollutant | Value | Level |
|---|---|---|
| O₃ | 114.6 µg/m³ | Moderate |
How the air is changing
Over the last seven days there was more O₃ in the air than the week before.
- O₃: average 112.3 µg/m³, week before 98 µg/m³
Last month there was less O₃ in the air than the month before.
- O₃: average 93.3 µg/m³, month before 120.5 µg/m³
Ozone O₃
114.6
Nowµg/m³
Measured at 00:00
108.4
Last 24 hoursµg/m³
measured in 92 % of hours · provisional
112.3
Last 7 daysµg/m³
measured in 83 % of hours · provisional
94.1
Last 30 daysµg/m³
measured in 96 % of hours · provisional
91.8
Last 12 monthsµg/m³
measured in 97 % of hours · provisional
Days in 2023: O₃, 8-hour average above 120 µg/m³
49 days above the limit.
- above the limit
- below the limit
Days above the limit with values (49)
- Apr 23 120
- May 21 126
- May 22 121
- May 24 122
- May 27 121
- May 28 124
- May 29 122
- May 30 133
- May 31 132
- Jun 1 125
- Jun 2 126
- Jun 3 126
- Jun 9 127
- Jun 10 134
- Jun 17 123
- Jun 18 145
- Jun 19 144
- Jun 20 137
- Jun 21 137
- Jun 22 133
- Jun 23 123
- Jun 27 126
- Jun 30 124
- Jul 1 121
- Jul 11 145
- Jul 12 148
- Jul 15 122
- Jul 16 125
- Jul 19 121
- Jul 22 127
- Jul 23 135
- Jul 25 122
- Jul 30 120
- Aug 5 127
- Aug 15 128
- Aug 16 125
- Aug 17 122
- Aug 21 125
- Aug 22 122
- Aug 23 120
- Aug 25 135
- Aug 26 132
- Aug 27 134
- Aug 28 132
- Sep 8 124
- Sep 9 127
- Sep 10 122
- Sep 11 131
- Oct 3 131
Values in µg/m³, limit 120 µg/m³.
Months of 2023
| Month | Days above 120 | Highest 8 h | No readings |
|---|---|---|---|
| January | 0 | 102 | 0 |
| February | 0 | 111 | 0 |
| March | 0 | 120 | 0 |
| April | 1 above the number allowed | 120 | 0 |
| May | 8 above the number allowed | 133 | 0 |
| June | 14 above the number allowed | 145 | 0 |
| July | 10 above the number allowed | 148 | 0 |
| August | 11 above the number allowed | 135 | 0 |
| September | 4 above the number allowed | 131 | 0 |
| October | 1 above the number allowed | 131 | 0 |
| November | 0 | 98 | 0 |
| December | 0 | 96 | 0 |
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 | ||
| 00:00 | 80 | model estimate, not counted |
| 23:00 | 115.1 | |
| 22:00 | 105.6 | |
| 21:00 | 98.4 | |
| 20:00 | 102.5 | |
| 19:00 | 96.4 | |
| 18:00 | 99.7 | |
| 17:00 | 103.1 | |
| 16:00 | 105 | |
| 15:00 | 104.3 | |
| 14:00 | 108 | |
| 13:00 | 109.4 | |
| 12:00 | 108.2 | |
| 11:00 | 108.4 | |
| 10:00 | 108.1 | |
| 09:00 | 110.8 | |
| 08:00 | 109.7 | |
| 07:00 | 109.3 | |
| 06:00 | 110.3 | |
| 05:00 | 110.7 | |
| 04:00 | 113.7 | |
| 03:00 | 120.3 | |
| 02:00 | 128.1 | |
| 01:00 | 125.8 | |
| Tuesday, 10/6 | ||
| 00:00 | 120.2 | |
| 23:00 | 117.8 | |
| 22:00 | 112.1 | |
| 21:00 | 105.9 | |
| 20:00 | 105.4 | |
| 19:00 | 108 | |
| 18:00 | 104.3 | |
| 17:00 | 104.4 | |
| 16:00 | 110.5 | |
| 15:00 | 114 | |
| 14:00 | 110.1 | |
| 13:00 | 108.1 | |
| 12:00 | 108.6 | |
| 11:00 | 108.3 | |
| 10:00 | 112.1 | |
| 09:00 | 116.8 | |
| 08:00 | 124.7 | |
| 07:00 | 125 | |
| 06:00 | 124.2 | |
| 05:00 | 119.5 | |
| 04:00 | 111.8 | |
| 03:00 | 109.7 | |
| 02:00 | 109.8 | |
| 01:00 | 110 | |
| Monday, 10/5 | ||
| 00:00 | 110.6 | |
| 23:00 | 112.2 | |
| 22:00 | 111.2 | |
| 21:00 | 111.4 | |
| 20:00 | 107.4 | |
| 19:00 | 103.1 | |
| 18:00 | 105.3 | |
| 17:00 | 98 | |
| 16:00 | 97.1 | |
| 15:00 | 95.9 | |
| 14:00 | 98.4 | |
| 13:00 | 96.3 | |
| 12:00 | 101.2 | |
| 11:00 | 100.9 | |
| 10:00 | 110 | |
| 09:00 | 117.4 | |
| 08:00 | 118.1 | |
| 07:00 | 112.9 | |
| 06:00 | 111.2 | |
| 05:00 | 115.3 | |
| 04:00 | 117 | |
| 03:00 | 123.9 | |
| 02:00 | 129.7 | |
| 01:00 | 129 | |
| Sunday, 10/4 | ||
| 00:00 | 127.4 | |
| 23:00 | 116.8 | |
| 22:00 | 118 | |
| 21:00 | 119 | |
| 20:00 | 118.4 | |
| 19:00 | 112.8 | |
| 18:00 | 118.7 | |
| 17:00 | 119 | |
| 16:00 | 114.8 | |
| 15:00 | 109.9 | |
| 14:00 | 107.5 | |
| 13:00 | 104.9 | |
| 12:00 | 106.6 | |
| 11:00 | 104.4 | |
| 10:00 | 108.3 | |
| 09:00 | 113.7 | |
| 08:00 | 122.1 | |
| 07:00 | 123.4 | |
| 06:00 | 124.5 | |
| 05:00 | 125 | |
| 04:00 | 119.6 | |
| 03:00 | 118.4 | |
| 02:00 | 118.1 | |
| 01:00 | 118.6 | |
| Saturday, 10/3 | ||
| 00:00 | 119.8 | |
| 23:00 | 120.5 | |
| 22:00 | 120.8 | |
| 21:00 | 122.4 | |
| 20:00 | 122.7 | |
| 19:00 | 119.6 | |
| 18:00 | 116.2 | |
| 17:00 | 117 | |
| 16:00 | 114.5 | |
| 15:00 | 111.7 | |
| 14:00 | 108.3 | |
| 13:00 | 111.8 | |
| 12:00 | 115.5 | |
| 11:00 | 117.4 | |
| 10:00 | 118.9 | |
| 09:00 | 118.7 | |
| 08:00 | 117.1 | |
| 07:00 | 118.1 | |
| 06:00 | 115.2 | |
| 05:00 | 116.1 | |
| 04:00 | 113.9 | |
| 03:00 | 109.5 | |
| 02:00 | 107.4 | |
| 01:00 | 108.1 | |
| Friday, 10/2 | ||
| 00:00 | 110.3 | |
| 23:00 | 110.3 | |
| 22:00 | 111.1 | |
| Thursday, 10/1 | ||
| 17:00 | 106.1 | |
| 16:00 | 108.8 | |
| 15:00 | 105.9 | |
| 14:00 | 102.6 | |
| 13:00 | 101.2 | |
| 12:00 | 102.5 | |
| 11:00 | 103 | |
| 10:00 | 106.8 | |
| 09:00 | 111.8 | |
| 08:00 | 112.8 | |
| 07:00 | 113 | |
| 06:00 | 114.3 | |
| 05:00 | 114.1 | |
| 04:00 | 114.8 | |
| 03:00 | 114 | |
Values as a table
| Day | µg/m³ | Note |
|---|---|---|
| Wed, 10/7 | 118.6 | provisional |
| Tue, 10/6 | 118 | provisional |
| Mon, 10/5 | 122.8 | above the limit · provisional |
| Sun, 10/4 | 121.2 | above the limit · provisional |
| Sat, 10/3 | 119.9 | provisional |
| Fri, 10/2 | too few readings | |
| Thu, 10/1 | 116.8 | provisional |
| Wed, 9/30 | 119.3 | provisional |
| Tue, 9/29 | 116.6 | provisional |
| Mon, 9/28 | 104.3 | provisional |
| Sun, 9/27 | 102.2 | provisional |
| Sat, 9/26 | 89.9 | provisional |
| Fri, 9/25 | 92.8 | provisional |
| Thu, 9/24 | 90.1 | provisional |
| Wed, 9/23 | 83.4 | provisional |
| Tue, 9/22 | 82.5 | provisional |
| Mon, 9/21 | 82.3 | provisional |
| Sun, 9/20 | 90 | provisional |
| Sat, 9/19 | 90.9 | provisional |
| Fri, 9/18 | 92.6 | provisional |
| Thu, 9/17 | 105.1 | provisional |
| Wed, 9/16 | 95.1 | provisional |
| Tue, 9/15 | 85 | provisional |
| Mon, 9/14 | 84.1 | provisional |
| Sun, 9/13 | 95.3 | provisional |
| Sat, 9/12 | 89.1 | provisional |
| Fri, 9/11 | 91.8 | provisional |
| Thu, 9/10 | 100.9 | provisional |
| Wed, 9/9 | 131.9 | above the limit · provisional |
| Tue, 9/8 | 122.6 | above the limit · provisional |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | 112.3 | 68.9 | measured in 83 % of hours · provisional · year before: same days |
| September 2026 | 93.3 | 80 | measured in 100 % of hours · provisional |
| August 2026 | 120.5 | 103.4 | measured in 97 % of hours · provisional |
| July 2026 | 109.4 | 104.3 | measured in 96 % of hours · provisional |
| June 2026 | 98.4 | 111.7 | measured in 96 % of hours · provisional |
| May 2026 | 101.5 | 96.2 | measured in 97 % of hours · provisional |
| April 2026 | 99.2 | 98.3 | measured in 99 % of hours · provisional |
| March 2026 | 93.2 | 96.3 | measured in 96 % of hours · provisional |
| February 2026 | 76.8 | 84.9 | measured in 97 % of hours · provisional |
| January 2026 | 74.6 | 81.6 | measured in 100 % of hours · provisional |
| December 2025 | 77.4 | 84.8 | measured in 96 % of hours · verified |
| November 2025 | 78 | 82.9 | measured in 96 % 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) | 64 | 45 | 45 |
| Annual average, µg/m³ | 96.8* | 90.1 | 91.1 |
| Highest 8-hour average, µg/m³ | 156August 6 | 158June 26 | 145September 5 |
| Hours measured | 97 % | 96 % | 96 % |
| Days without any reading from the station | 0 | 0 | 0 |
* 2026 up to October 7; 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.
■ 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 2023
| Day | Highest 8 h | Times the limit |
|---|---|---|
| Jul 12, 2023 | 148 | 1.2 × |
| Jul 11, 2023 | 145 | 1.2 × |
| Jun 18, 2023 | 145 | 1.2 × |
| Jun 19, 2023 | 144 | 1.2 × |
| Jun 21, 2023 | 137 | 1.1 × |
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: 3
3 outages, 81 hours in total in the last 12 months.
Timeline of outages from October 8, 2025 to today
| From | To | Duration |
|---|---|---|
| Oct 1, 2026 17:00 | Oct 2, 2026 21:00 | 28 hours |
| Aug 29, 2026 01:00 | Aug 30, 2026 01:00 | 24 hours |
| Jul 17, 2026 18:00 | Jul 18, 2026 23:00 | 29 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 Slovenian Environment Agency. 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.
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