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Air at the Novo mesto station

Novo mesto, Slovenia

Network: Slovenian Environment Agency · Station code: SI0061A

This year, up to yesterday (October 6)

47 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: 25 days above the limit, the target value allows 25 as a three-year average.

3 days

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

35 days are allowed in the whole year.

Worst day: August 6, 2026, O₃ 160 µg/m³ as a daily average, 1.3 times the limit.

Daily average for 275 of 279 days · data for 2026 not yet finally verified · Yardstick: EU limits (Directive 2008/50/EC)

All figures by year and month

Fair

Air now · Measured at 21:00

Latest values

Latest value: 21:00

Readings
PollutantValueLevel
PM1021.5 µg/m³Fair
NO₂24.2 µg/m³Fair
O₃78.2 µg/m³Fair

How the air is changing

Over the last seven days there was more PM10, PM2.5, and O₃ in the air than the week before.

  • PM10: average 17.7 µg/m³, week before 11.9 µg/m³
  • PM2.5: average 11 µg/m³, week before 7.6 µg/m³
  • NO₂: too few readings to compare
  • O₃: average 60.2 µg/m³, week before 45.9 µg/m³

Last month there was less PM10, PM2.5, and O₃ in the air than the month before.

  • PM10: average 10.5 µg/m³, month before 13.5 µg/m³
  • PM2.5: average 5.6 µg/m³, month before 7.3 µg/m³
  • NO₂: too few readings to compare
  • O₃: average 55.4 µg/m³, month before 90.6 µg/m³

Show

Ozone O₃

78.2

Nowµg/m³

Measured at 21:00

61.2

Last 24 hoursµg/m³

measured in 96 % of hours · provisional

60.2

Last 7 daysµg/m³

measured in 100 % of hours · provisional

50.8

Last 30 daysµg/m³

measured in 100 % of hours · provisional

52.1

Last 12 monthsµg/m³

measured in 97 % of hours · provisional

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

47 days above the limit.

1102031JanFebMarAprApr 25: 140 µg/m³, above the limitApr 26: 131 µg/m³, above the limitApr 28: 121 µg/m³, above the limitMayMay 4: 124 µg/m³, above the limitMay 23: 123 µg/m³, above the limitMay 25: 127 µg/m³, above the limitMay 26: 125 µg/m³, above the limitMay 28: 125 µg/m³, above the limitJunJun 25: 121 µg/m³, above the limitJun 26: 138 µg/m³, above the limitJun 27: 133 µg/m³, above the limitJun 28: 132 µg/m³, above the limitJun 29: 143 µg/m³, above the limitJun 30: 140 µg/m³, above the limitJulJul 3: 127 µg/m³, above the limitJul 15: 137 µg/m³, above the limitJul 16: 128 µg/m³, above the limitJul 26: 130 µg/m³, above the limitJul 27: 126 µg/m³, above the limitJul 30: 150 µg/m³, above the limitJul 31: 136 µg/m³, above the limitAugAug 1: 145 µg/m³, above the limitAug 2: 138 µg/m³, above the limitAug 3: 134 µg/m³, above the limitAug 4: 132 µg/m³, above the limitAug 5: 146 µg/m³, above the limitAug 6: 160 µg/m³, above the limitAug 7: 129 µg/m³, above the limitAug 8: 137 µg/m³, above the limitAug 9: 140 µg/m³, above the limitAug 10: 143 µg/m³, above the limitAug 11: 138 µg/m³, above the limitAug 12: 130 µg/m³, above the limitAug 13: 134 µg/m³, above the limitAug 14: 148 µg/m³, above the limitAug 15: 149 µg/m³, above the limitAug 16: 143 µg/m³, above the limitAug 17: 134 µg/m³, above the limitAug 19: 143 µg/m³, above the limitAug 20: 139 µg/m³, above the limitAug 24: 129 µg/m³, above the limitAug 31: 120 µg/m³, above the limitSepSep 2: 125 µg/m³, above the limitSep 4: 136 µg/m³, above the limitSep 5: 121 µg/m³, above the limitSep 7: 122 µg/m³, above the limitSep 8: 127 µg/m³, above the limitOctNovDec
  • above the limit
  • below the limit
  • too few readings for the day
Days above the limit with values (47)
  1. Apr 25 140
  2. Apr 26 131
  3. Apr 28 121
  4. May 4 124
  5. May 23 123
  6. May 25 127
  7. May 26 125
  8. May 28 125
  9. Jun 25 121
  10. Jun 26 138
  11. Jun 27 133
  12. Jun 28 132
  13. Jun 29 143
  14. Jun 30 140
  15. Jul 3 127
  16. Jul 15 137
  17. Jul 16 128
  18. Jul 26 130
  19. Jul 27 126
  20. Jul 30 150
  21. Jul 31 136
  22. Aug 1 145
  23. Aug 2 138
  24. Aug 3 134
  25. Aug 4 132
  26. Aug 5 146
  27. Aug 6 160
  28. Aug 7 129
  29. Aug 8 137
  30. Aug 9 140
  31. Aug 10 143
  32. Aug 11 138
  33. Aug 12 130
  34. Aug 13 134
  35. Aug 14 148
  36. Aug 15 149
  37. Aug 16 143
  38. Aug 17 134
  39. Aug 19 143
  40. Aug 20 139
  41. Aug 24 129
  42. Aug 31 120
  43. Sep 2 125
  44. Sep 4 136
  45. Sep 5 121
  46. Sep 7 122
  47. Sep 8 127

Values in µg/m³, limit 120 µg/m³.

Months of 2026

MonthDays above 120Highest 8 hNo readings
January0710
February0900
March01140
April3 above the number allowed1400
May5 above the number allowed1270
June6 above the number allowed1430
July7 above the number allowed1500
August21 above the number allowed1600
September5 above the number allowed1360
October up to yesterday01120

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 124 µg/m³, latest 57 µg/m³ (21:00)050100150ThuFriSatSunMonTueWedlatest 57 (21:00)
measured
Last 7 days, every hour: O₃ in µg/m³
Values as a table
Hour toµg/m³Note
Wednesday, 10/7
21:0057.1
20:0095
19:00112.5
18:00114.5
17:00112.3
16:00108.2
15:00111.1
14:00106.5
13:00104.7
12:0090.1
11:0043.7
10:0019.7
09:0011.4
08:007.7
07:0017.3
06:0023.7
05:0029.9
04:0031.9
03:0041.8
02:0043.6
01:0046
Tuesday, 10/6
00:0042.3
23:0037.2
22:0043.2
21:0042
20:0052.6
19:0088.7
18:00100.8
17:00115.5
16:00123.9
15:00123.3
14:00120.9
13:00110.5
12:0082
11:0064.4
10:0037.3
09:0014.2
08:007.6
07:0011
06:0021.2
05:0021.1
04:0032.2
03:0029.7
02:0029.9
01:0039.5
Monday, 10/5
00:0035.7
23:0032.3
22:0043.3
21:0042.3
20:0050.4
19:0061.7
18:00103
17:00111.3
16:00111.6
15:00107.3
14:00104.2
13:0095
12:0083.6
11:0062.2
10:0036.5
09:0021.2
08:0013.6
07:0018.8
06:0026
05:0033.8
04:0039.7
03:0041.6
02:0044.4
01:0049.6
Sunday, 10/4
00:0053
23:0058.8
22:0060.4
21:0061.3
20:0080.7
19:0097.4
18:00118.9
17:00121.8
16:00120.4
15:00117.6
14:00114.7
13:00104.5
12:0087.8
11:0070.2
10:0048
09:0040.9
08:0028
07:0027.4
06:0037.8
05:0033.8
04:0036.5
03:0043.1
02:0044
01:0048.3
Saturday, 10/3
00:0051.3
23:0053.2
22:0058.2
21:0060.3
20:0075.6
19:00100.8
18:00121.7
17:00119.4
16:00116.7
15:00116.1
14:00119.7
13:00113.3
12:0087.4
11:0061
10:0048
09:0028.7
08:0016
07:0015.5
06:0025.7
05:0029.5
04:0034.5
03:0039
02:0038.8
01:0039.5
Friday, 10/2
00:0042
23:0041.2
22:0035.2
21:0040.4
20:0063.7
19:0083
18:00116.1
17:00115.6
16:00114.9
15:00108
14:00101.4
13:0095.9
12:0069.6
11:0056.2
10:0032.7
09:0014.1
08:0010.6
07:0014
06:0021.5
05:0031.7
04:0030.8
03:0035
02:0039.2
01:0037.7
Thursday, 10/1
00:0042.9
23:0042.6
22:0048.1
21:0057.7
20:0067.4
19:0097.6
18:00117.6
17:00117.3
16:00109
15:00105.4
14:00101.6
13:0098.9
12:0090.5
11:0066.1
10:0043
09:0016.9
08:006.5
07:005.4
06:0013.9
05:0019.8
04:0026
03:0031.9
02:0031.5
01:0038.5
Wednesday, 9/30
00:0041.4
Last 30 days, highest 8-hour average of the day: O₃ in µg/m³ · 2 days above the limithighest 127 µg/m³, latest 108 µg/m³0501001509/99/169/239/30highest 127latest 108
day above the limittarget 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, 10/6108.2provisional
Mon, 10/597.3provisional
Sun, 10/4110.4provisional
Sat, 10/3111.9provisional
Fri, 10/2100.6provisional
Thu, 10/1104.7provisional
Wed, 9/30102.8provisional
Tue, 9/29107.7provisional
Mon, 9/28103.3provisional
Sun, 9/2794.5provisional
Sat, 9/2687.1provisional
Fri, 9/2577.9provisional
Thu, 9/2447.2provisional
Wed, 9/2377.6provisional
Tue, 9/2275.8provisional
Mon, 9/2167.6provisional
Sun, 9/2079provisional
Sat, 9/1971.7provisional
Fri, 9/1853.5provisional
Thu, 9/1755.8provisional
Wed, 9/1696.5provisional
Tue, 9/1584.6provisional
Mon, 9/1482.9provisional
Sun, 9/1394.2provisional
Sat, 9/1286.6provisional
Fri, 9/1164.9provisional
Thu, 9/1058.6provisional
Wed, 9/999.6provisional
Tue, 9/8127.3above the limit · provisional
Mon, 9/7122.2above the limit · provisional
Last 12 months, monthly average: O₃ in µg/m³highest 91 µg/m³, latest 61 µg/m³050100150DecFebAprJunAugOcthighest 91latest 61
Last 12 monthsthis month so fara year earlier
Last 12 months, monthly average: O₃ in µg/m³
Values as a table
Monthµg/m³a year earlierNote
October 2026 so far60.638.1measured in 100 % of hours · provisional · year before: same days
September 202655.439.2measured in 100 % of hours · provisional
August 202690.661.7measured in 100 % of hours · provisional
July 202679.166measured in 100 % of hours · provisional
June 202669.585.1measured in 92 % of hours · provisional
May 20267163measured in 97 % of hours · provisional
April 202668.461.9measured in 95 % of hours · provisional
March 202654.555.7measured in 95 % of hours · provisional
February 202629.434measured in 97 % of hours · provisional
January 202630.233.4measured in 100 % of hours · provisional
December 202511.916.8measured in 96 % of hours · verified
November 202530.222.3measured in 96 % 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)47259
Annual average, µg/m³61.2*47.642
Highest 8-hour average, µg/m³160August 6152June 25127July 16
Hours measured98 %96 %95 %
Days without any reading from the station000

* 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.

■ 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 6, 2026provisional1601.3 ×
Jul 30, 2026provisional1501.2 ×
Aug 15, 2026provisional1491.2 ×
Aug 14, 2026provisional1481.2 ×
Aug 5, 2026provisional1461.2 ×

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: 0

Timeline of outages from October 7, 2025 to today

In the last 12 months this station had no outage of 24 hours or longer.

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.

How we measure

samoEKO is a brand of samoLabs, Juelich.