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Air at the Split-3 station

Split, Croatia

Network: Državna mreža za trajno praćenje kvalitete zraka · Station code: HR0043A

This year, up to yesterday (October 7)

15 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.

2 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: April 26, 2026, O₃ 138 µg/m³ as a daily average, 1.1 times the limit.

Daily average for 262 of 280 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 21:00

Latest values

Latest value: Wed 21:00

Readings
PollutantValueLevel
PM1017.4 µg/m³Fair
NO₂3.9 µg/m³Good
O₃118.9 µg/m³Moderate
SO₂0.8 µg/m³Good

How the air is changing

Over the last seven days there was more PM10, PM2.5, NO₂, and O₃ in the air than the week before.

  • PM10: average 24.2 µg/m³, week before 16.7 µg/m³
  • PM2.5: average 9.2 µg/m³, week before 7.1 µg/m³
  • NO₂: average 25.2 µg/m³, week before 21.2 µg/m³
  • O₃: average 79.5 µg/m³, week before 72.2 µg/m³
  • SO₂: average 3.3 µg/m³, week before 3 µg/m³

Last month there was less PM10, PM2.5, and NO₂ in the air than the month before.

  • PM10: average 20.3 µg/m³, month before 23 µg/m³
  • PM2.5: average 8.7 µg/m³, month before 12.7 µg/m³
  • NO₂: average 20.3 µg/m³, month before 28 µg/m³
  • O₃: average 77.3 µg/m³, month before 85.5 µg/m³
  • SO₂: average 1.5 µg/m³, month before 1.1 µg/m³

Show

Ozone O₃

118.9

Nowµg/m³

Measured at 21:00

103.5

Last 24 hoursµg/m³

measured in 83 % of hours · provisional

79.5

Last 7 daysµg/m³

measured in 98 % of hours · provisional

77

Last 30 daysµg/m³

measured in 99 % of hours · provisional

73.1

Last 12 monthsµg/m³

measured in 95 % of hours · provisional

Days in 2025: O₃, 8-hour average above 120 µg/m³

9 days above the limit.

1102031JanFebMarAprMayMay 4: 126 µg/m³, above the limitMay 5: 125 µg/m³, above the limitJunJun 15: 120 µg/m³, above the limitJun 16: 125 µg/m³, above the limitJun 23: 126 µg/m³, above the limitJulJul 4: 121 µg/m³, above the limitAugAug 13: 131 µg/m³, above the limitAug 14: 137 µg/m³, above the limitAug 29: 127 µg/m³, above the limitSepOctNovDec
  • above the limit
  • below the limit
  • too few readings for the day
  • no O₃ data in the EEA database
Days above the limit with values (9)
  1. May 4 126
  2. May 5 125
  3. Jun 15 120
  4. Jun 16 125
  5. Jun 23 126
  6. Jul 4 121
  7. Aug 13 131
  8. Aug 14 137
  9. Aug 29 127

Values in µg/m³, limit 120 µg/m³.

Months of 2025

MonthDays above 120Highest 8 hNo readings
January0860
February0890
March01120
April01150
May2 above the number allowed1260
June3 above the number allowed1260
July1 above the number allowed1210
August3 above the number allowed1370
September0980
October0910
November0880
December0860

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 123 µg/m³, latest 120 µg/m³ (20:00)050100150ThuFriSatSunMonTueWedhighest 123latest 120 (20:00)
measuredmodel estimate, not counted
Last 7 days, every hour: O₃ in µg/m³
Values as a table
Hour toµg/m³Note
Wednesday, 10/7
23:0082model estimate, not counted
22:0082model estimate, not counted
21:0083model estimate, not counted
20:00119.7
19:00121.5
18:00123.3
17:00123.3
16:00122.4
15:00121.1
14:00120.5
13:00118.1
12:00116.9
11:00113.2
10:0086.7
09:0064.4
08:0071.8
07:0083.7
06:0095.1
05:0097.6
04:0096.2
03:0094.9
02:0093.1
01:0086.8
Tuesday, 10/6
00:0079.2
23:0034.9
22:0020.8
21:0053.1
20:0088.2
19:0095.3
18:00111.4
17:0097.8
16:00114.1
15:00120.5
14:00117.4
13:00115.2
12:00103.5
11:0095.4
10:0060
09:0053
08:0055.7
07:0073.6
06:0084.2
05:0083.4
04:0085.1
03:0090.2
02:0090.9
01:0081.4
Monday, 10/5
00:0056.5
23:0034.3
22:0063.5
21:0060.6
20:0067.4
19:00100.9
18:00108.1
17:0095.4
16:0041.8
15:0050.1
14:00110.6
13:0087.3
12:0082.6
11:0074
10:0055.2
09:0046
08:0058
07:0078.2
06:0083.4
05:0087.6
04:0089.2
03:0091.6
02:0094
01:0075.2
Sunday, 10/4
00:0065.3
23:0070.4
22:0082
21:0085.9
20:0078.7
19:0044.9
18:0073.1
17:0064.6
16:0089
15:00117.4
14:00114.5
13:0066.9
12:0070.7
11:0096.1
10:0074.2
09:0074.3
08:0084.1
07:0083.2
06:0088.5
05:0089.2
04:0088.9
03:0085.5
02:0083.1
01:0088.3
Saturday, 10/3
00:0077.5
23:0061.2
22:0035.8
21:0030.2
20:0031.9
19:0028
18:0027.5
17:0030
16:0029.2
15:0081.8
14:0089.9
13:00104.5
12:00108
11:0099.4
10:0071.8
09:0074.4
08:0078.7
07:0087.3
06:0092.8
05:0091.6
04:0094.3
03:0094.8
02:0093
01:0093.3
Friday, 10/2
00:0091.1
23:0072.1
22:0026.8
21:0049.4
20:0058.6
19:0086.1
18:0086
17:0080.1
16:00100.4
15:00106.9
14:0094
13:0087.1
12:0095.2
11:0081
10:0060.9
09:0054.7
08:0052.7
07:0070.8
06:0076.9
05:0081.8
04:0081.5
03:0083.5
02:0083.4
01:0060.8
Thursday, 10/1
00:0067.3
23:0074.4
22:0077.6
21:0074.2
20:0033.9
19:0057.5
18:0037
17:0043.5
16:0038.7
15:0081.2
14:0099
13:0089.4
12:0096.6
11:0092.4
10:0064.9
09:0044.4
08:0054.9
07:0068.3
06:0076.8
05:0080.4
04:0081.8
03:0083.9
02:0086.5
Last 30 days, highest 8-hour average of the day: O₃ in µg/m³ · 1 day above the limithighest 122 µg/m³, latest 122 µg/m³0501001509/109/179/2410/1highest 122
day above the limittarget value, 120 µg/m³
Last 30 days, highest 8-hour average of the day: O₃ in µg/m³ · 1 day above the limit
Values as a table
Dayµg/m³Note
Wed, 10/7121.9above the limit · provisional
Tue, 10/6109.4provisional
Mon, 10/584.6provisional
Sun, 10/487.9provisional
Sat, 10/392.3provisional
Fri, 10/292provisional
Thu, 10/184.1provisional
Wed, 9/3092.5provisional
Tue, 9/2987.1provisional
Mon, 9/2883.9provisional
Sun, 9/2778.3provisional
Sat, 9/2689.3provisional
Fri, 9/2579.8provisional
Thu, 9/2482.3provisional
Wed, 9/2378provisional
Tue, 9/2282.3provisional
Mon, 9/2173.6provisional
Sun, 9/2076.2provisional
Sat, 9/1993.9provisional
Fri, 9/1880.6provisional
Thu, 9/1795.1provisional
Wed, 9/1698provisional
Tue, 9/1578.4provisional
Mon, 9/1495.6provisional
Sun, 9/1395.1provisional
Sat, 9/1280provisional
Fri, 9/11105.1provisional
Thu, 9/10109.7provisional
Wed, 9/9108.8provisional
Tue, 9/8116.2provisional
Last 12 months, monthly average: O₃ in µg/m³highest 90 µg/m³, latest 80 µg/m³050100150DecFebAprJunAugOcthighest 90latest 80
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 far79.567.2measured in 98 % of hours · provisional · year before: same days
September 202677.364.3measured in 100 % of hours · provisional
August 202685.583measured in 100 % of hours · provisional
July 20268681.2measured in 100 % of hours · provisional
June 202680.185.5measured in 96 % of hours · provisional
May 202690.186.4measured in 99 % of hours · provisional
April 202689.379.8measured in 100 % of hours · provisional
March 202671.276.8measured in 100 % of hours · provisional
February 202664.4too few readingsmeasured in 87 % of hours · provisional
January 2026too few readings62.2measured in 69 % of hours · provisional
December 202547.7too few readingsmeasured in 96 % of hours · verified
November 202556.356.1measured in 100 % 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)15≥ 9²≥ 6²
Annual average, µg/m³79*71.6too few
Highest 8-hour average, µg/m³138April 26137August 14131August 1
Hours measured95 %91 %90 %
Days without any reading from the station000

* 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.

≥ 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 2025

DayHighest 8 hTimes the limit
Aug 14, 20251371.1 ×
Aug 13, 20251311.1 ×
Aug 29, 20251271.1 ×
Jun 23, 20251261.1 ×
May 4, 20251261.0 ×

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, 26 hours in total in the last 12 months.

Timeline of outages from October 8, 2025 to today

FromToDuration
Jun 4, 2026 09:00Jun 5, 2026 11:0026 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.

How we measure

samoEKO is a brand of samoLabs, Juelich.