Air at the AQMS Peje station

Peć, Kosovo

Network: Kosova Environmental Protection Agency ( KEPA) · Station code: XK0005A

In 2025

at least

16 days

with an 8-hour average of ozone (O₃) above the target value of 120 µg/m³.

Readings are missing for part of the period, so the real number may be higher.

Worst day: August 13, 2025, O₃ 136 µg/m³ as a daily average, 1.1 times the limit.

Daily average for 249 of 365 days · data for 2025 not yet finally verified · Yardstick: EU limits (Directive 2008/50/EC)

All figures by year and month

No data has arrived from this station since November 27, 2025 at 20:00

No reading for 314 days.

We take the readings from the European Environment Agency (EEA), and no new values for this station are coming from there. The cause may lie with the station itself or with the data transmission.

Last reading: November 27, 2025 at 20:00
Measured then: NO₂ 20.8 µg/m³, PM10 10.5 µg/m³, PM2.5 9.6 µg/m³

All outages of this station

Nearest station measuring now: Novi Pazar, Serbia, about 55 km away.

That reading is from another place. Your air may be better or worse.

Go to that station

How the air is changing

There are not enough readings to compare with the week before.

PM10: too few readings to compare
PM2.5: too few readings to compare
NO₂: too few readings to compare
O₃: too few readings to compare
SO₂: too few readings to compare

There are not enough readings to compare with the month before.

PM10: too few readings to compare
PM2.5: too few readings to compare
NO₂: too few readings to compare
O₃: too few readings to compare
SO₂: too few readings to compare

Show

Particulate matter PM10

no measurement

Now

too few readings

Last 24 hours

measured in 0 % of hours

too few readings

Last 7 days

measured in 0 % of hours

too few readings

Last 30 days

measured in 0 % of hours

too few readings

Last 12 months

measured in 14 % of hours · provisional

Days in 2023: PM10, daily average above 50 µg/m³

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

above the limit
below the limit
too few readings for the day
no data from the station

Days above the limit with values (20)

Jan 1 79
Jan 2 94
Jan 3 113
Jan 4 103
Jan 5 81
Jan 6 52
Jan 7 53
Jan 8 69
Feb 16 72
Feb 17 51
Dec 6 62
Dec 11 56
Dec 18 74
Dec 19 98
Dec 20 98
Dec 21 63
Dec 25 54
Dec 28 69
Dec 30 67
Dec 31 90

Values in µg/m³, limit 50 µg/m³.

Months of 2023

Month	Days above 50	Average	Highest day	No readings
January	8 above the number allowed	39	113	0
February	2 above the number allowed	too few	72	1
March	0	20	37	0
April	0	14	26	0
May	0	11	18	0
June	0	13	25	0
July	0	17	28	0
August	0	too few	18	4
September	0	too few	20	18
October	0	18	32	0
November	0	too few	45	1
December	10 above the number allowed	46	98	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.

There are no readings for this period.

Last 7 days, every hour: PM10 in µg/m³

no data from the station

Last 30 days, daily average: PM10 in µg/m³

Values as a table

Day	µg/m³	Note
Tue, 10/6		no data from the station
Mon, 10/5		no data from the station
Sun, 10/4		no data from the station
Sat, 10/3		no data from the station
Fri, 10/2		no data from the station
Thu, 10/1		no data from the station
Wed, 9/30		no data from the station
Tue, 9/29		no data from the station
Mon, 9/28		no data from the station
Sun, 9/27		no data from the station
Sat, 9/26		no data from the station
Fri, 9/25		no data from the station
Thu, 9/24		no data from the station
Wed, 9/23		no data from the station
Tue, 9/22		no data from the station
Mon, 9/21		no data from the station
Sun, 9/20		no data from the station
Sat, 9/19		no data from the station
Fri, 9/18		no data from the station
Thu, 9/17		no data from the station
Wed, 9/16		no data from the station
Tue, 9/15		no data from the station
Mon, 9/14		no data from the station
Sun, 9/13		no data from the station
Sat, 9/12		no data from the station
Fri, 9/11		no data from the station
Thu, 9/10		no data from the station
Wed, 9/9		no data from the station
Tue, 9/8		no data from the station
Mon, 9/7		no data from the station

Last 12 monthsa year earlierEU annual limit, 40 µg/m³month with days without data from the station

Last 12 months, monthly average: PM10 in µg/m³

Values as a table

Month	µg/m³	a year earlier	Note
October 2026 so far	too few readings	7.3	year before: same days · 6 days without data from the station
September 2026	too few readings	7.1	30 days without data from the station
August 2026	too few readings	8.6	31 days without data from the station
July 2026	too few readings	10.8	31 days without data from the station
June 2026	too few readings	12	30 days without data from the station
May 2026	too few readings	8.7	31 days without data from the station
April 2026	too few readings	11.3	30 days without data from the station
March 2026	too few readings	11.6	31 days without data from the station
February 2026	too few readings		28 days without data from the station
January 2026	too few readings		31 days without data from the station
December 2025	too few readings	too few readings	31 days without data from the station
November 2025	16.2	too few readings	measured in 89 % of hours · provisional · 3 days without data from the station

PM10 by year

Yardstick: EU limits (Directive 2008/50/EC)

Measure	2025	2024	2023
Days above 50 µg/m³ (allowed 35)	0²	16	≥ 20²
Annual average, µg/m³ (EU limit 40)	too few	19.1	too few
Highest daily average, µg/m³	33November 16	110February 1	113January 3
Highest hourly value, µg/m³	85November 16	299January 31	221January 3
Hours measured	71 %	92 %	77 %
Days without any reading from the station	101	24	24

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.

Unverified hourly values of particulate matter from 975 µg/m³ up, and single spikes from 500 µg/m³ up between low values, count as missing. In the verified data for BiH from 2023 to 2025 no hour was above 600 µg/m³.

■ and a figure in red: more than is allowed for the whole year.

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 45 µg/m³, 18 days allowed. In 2023 there were 24 such days.
WHO 2021: daily 45 µg/m³, at most three to four days a year. In 2023 there were 24 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.

The worst days of 2023

Day	Average	Times the limit
Jan 3, 2023	113	2.3 ×
Jan 4, 2023	103	2.1 ×
Dec 19, 2023	98	2.0 ×
Dec 20, 2023	98	2.0 ×
Jan 2, 2023	94	1.9 ×

Daily average in µg/m³, daily limit 50 µg/m³. Days with the same unverified value over many hours are not on this list.

Particulate matter PM2.5

no measurement

Now

too few readings

Last 24 hours

measured in 0 % of hours

too few readings

Last 7 days

measured in 0 % of hours

too few readings

Last 30 days

measured in 0 % of hours

too few readings

Last 12 months

measured in 14 % of hours · provisional

Months of 2023

Month	Average	Highest day	No readings
January	34	80	0
February	too few	57	1
March	16	29	0
April	10	18	0
May	8	12	0
June	8	14	0
July	8	12	0
August	too few	13	4
September	too few	8	18
October	11	19	0
November	too few	34	1
December	37	87	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.

There are no readings for this period.

Last 7 days, every hour: PM2.5 in µg/m³

no data from the station

Last 30 days, daily average: PM2.5 in µg/m³

Values as a table

Day	µg/m³	Note
Tue, 10/6		no data from the station
Mon, 10/5		no data from the station
Sun, 10/4		no data from the station
Sat, 10/3		no data from the station
Fri, 10/2		no data from the station
Thu, 10/1		no data from the station
Wed, 9/30		no data from the station
Tue, 9/29		no data from the station
Mon, 9/28		no data from the station
Sun, 9/27		no data from the station
Sat, 9/26		no data from the station
Fri, 9/25		no data from the station
Thu, 9/24		no data from the station
Wed, 9/23		no data from the station
Tue, 9/22		no data from the station
Mon, 9/21		no data from the station
Sun, 9/20		no data from the station
Sat, 9/19		no data from the station
Fri, 9/18		no data from the station
Thu, 9/17		no data from the station
Wed, 9/16		no data from the station
Tue, 9/15		no data from the station
Mon, 9/14		no data from the station
Sun, 9/13		no data from the station
Sat, 9/12		no data from the station
Fri, 9/11		no data from the station
Thu, 9/10		no data from the station
Wed, 9/9		no data from the station
Tue, 9/8		no data from the station
Mon, 9/7		no data from the station

Last 12 monthsa year earlierEU annual limit, 25 µg/m³month with days without data from the station

Last 12 months, monthly average: PM2.5 in µg/m³

Values as a table

Month	µg/m³	a year earlier	Note
October 2026 so far	too few readings	6.4	year before: same days · 6 days without data from the station
September 2026	too few readings	4.9	30 days without data from the station
August 2026	too few readings	5.6	31 days without data from the station
July 2026	too few readings	6	31 days without data from the station
June 2026	too few readings	7	30 days without data from the station
May 2026	too few readings	5.6	31 days without data from the station
April 2026	too few readings	7.6	30 days without data from the station
March 2026	too few readings	9	31 days without data from the station
February 2026	too few readings		28 days without data from the station
January 2026	too few readings		31 days without data from the station
December 2025	too few readings	too few readings	31 days without data from the station
November 2025	14.9	too few readings	measured in 89 % of hours · provisional · 3 days without data from the station

PM2.5 by year

Yardstick: EU limits (Directive 2008/50/EC)

Measure	2025	2024	2023
Annual average, µg/m³ (EU limit 25)	too few	13	too few
Highest daily average, µg/m³	31November 16	70December 31	87December 19
Highest hourly value, µg/m³	79November 16	177January 1	168January 4
Hours measured	71 %	92 %	77 %
Days without any reading from the station	101	24	24

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.

Compared with the new EU rules and the WHO recommendation

EU from 2030: daily 25 µg/m³, 18 days allowed. In 2023 there were 55 such days.
WHO 2021: daily 15 µg/m³, at most three to four days a year. In 2023 there were 94 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.

Nitrogen dioxide NO₂

no measurement

Now

too few readings

Last 24 hours

measured in 0 % of hours

too few readings

Last 7 days

measured in 0 % of hours

too few readings

Last 30 days

measured in 0 % of hours

too few readings

Last 12 months

measured in 13 % of hours · provisional

Days in 2023: NO₂, at least one hour above 200 µg/m³

No measured day above the limit. 24 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 2023

Month	Average	Highest day	No readings
January	22	37	0
February	too few	44	1
March	15	27	0
April	11	20	0
May	9	16	0
June	too few	10	0
July	10	19	0
August	too few	18	4
September	too few	10	18
October	16	25	0
November	too few	31	1
December	28	46	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.

There are no readings for this period.

Last 7 days, every hour: NO₂ in µg/m³

no data from the station

Last 30 days, daily average: NO₂ in µg/m³

Values as a table

Day	µg/m³	Note
Tue, 10/6		no data from the station
Mon, 10/5		no data from the station
Sun, 10/4		no data from the station
Sat, 10/3		no data from the station
Fri, 10/2		no data from the station
Thu, 10/1		no data from the station
Wed, 9/30		no data from the station
Tue, 9/29		no data from the station
Mon, 9/28		no data from the station
Sun, 9/27		no data from the station
Sat, 9/26		no data from the station
Fri, 9/25		no data from the station
Thu, 9/24		no data from the station
Wed, 9/23		no data from the station
Tue, 9/22		no data from the station
Mon, 9/21		no data from the station
Sun, 9/20		no data from the station
Sat, 9/19		no data from the station
Fri, 9/18		no data from the station
Thu, 9/17		no data from the station
Wed, 9/16		no data from the station
Tue, 9/15		no data from the station
Mon, 9/14		no data from the station
Sun, 9/13		no data from the station
Sat, 9/12		no data from the station
Fri, 9/11		no data from the station
Thu, 9/10		no data from the station
Wed, 9/9		no data from the station
Tue, 9/8		no data from the station
Mon, 9/7		no data from the station

Last 12 monthsa year earlierEU annual limit, 40 µg/m³month with days without data from the station

Last 12 months, monthly average: NO₂ in µg/m³

Values as a table

Month	µg/m³	a year earlier	Note
October 2026 so far	too few readings	12.9	year before: same days · 6 days without data from the station
September 2026	too few readings	11.2	30 days without data from the station
August 2026	too few readings	11.6	31 days without data from the station
July 2026	too few readings	10	31 days without data from the station
June 2026	too few readings	8	30 days without data from the station
May 2026	too few readings	8.2	31 days without data from the station
April 2026	too few readings	10.6	30 days without data from the station
March 2026	too few readings	15.3	31 days without data from the station
February 2026	too few readings		28 days without data from the station
January 2026	too few readings		31 days without data from the station
December 2025	too few readings	too few readings	31 days without data from the station
November 2025	21.5	too few readings	measured in 82 % of hours · provisional · 3 days without data from the station

NO₂ by year

Yardstick: EU limits (Directive 2008/50/EC)

Measure	2025	2024	2023
Hours above 200 µg/m³ (allowed 18)	0²	0²	0²
Hours above 400 µg/m³, three hours in a row (alert threshold)	0	0	0
Annual average, µg/m³ (EU limit 40)	too few	14.7¹	too few
Highest daily average, µg/m³	32November 17	47February 1	46December 19
Highest hourly value, µg/m³	86August 15	96December 31	100February 16
Hours measured	64 %	87 %	70 %
Days without any reading from the station	101	24	24

The monitoring networks have not yet finally verified this year’s data. The EEA publishes verified values once a year.

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.

There is no allowed number for the warning and alert thresholds: every such hour or day is in red.

Compared with the new EU rules and the WHO recommendation

EU from 2030: daily 50 µg/m³, 18 days allowed. In 2023 there were 0 such days.
WHO 2021: daily 25 µg/m³, at most three to four days a year. In 2023 there were 41 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

no measurement

Now

too few readings

Last 24 hours

measured in 0 % of hours

too few readings

Last 7 days

measured in 0 % of hours

too few readings

Last 30 days

measured in 0 % of hours

too few readings

Last 12 months

measured in 14 % of hours · provisional

Days in 2023: O₃, 8-hour average above 120 µg/m³

No measured day above the limit. 24 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

Months of 2023

Month	Average	Highest 8 h	No readings
January	26	74	0
February	too few	88	1
March	61	105	0
April	70	107	0
May	64	105	0
June	too few	103	0
July	67	107	0
August	too few	103	4
September	too few	77	18
October	43	90	0
November	too few	60	1
December	21	70	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.

There are no readings for this period.

Last 7 days, every hour: O₃ in µg/m³

no data from the station

Last 30 days, highest 8-hour average of the day: O₃ in µg/m³

Values as a table

Day	µg/m³	Note
Tue, 10/6		no data from the station
Mon, 10/5		no data from the station
Sun, 10/4		no data from the station
Sat, 10/3		no data from the station
Fri, 10/2		no data from the station
Thu, 10/1		no data from the station
Wed, 9/30		no data from the station
Tue, 9/29		no data from the station
Mon, 9/28		no data from the station
Sun, 9/27		no data from the station
Sat, 9/26		no data from the station
Fri, 9/25		no data from the station
Thu, 9/24		no data from the station
Wed, 9/23		no data from the station
Tue, 9/22		no data from the station
Mon, 9/21		no data from the station
Sun, 9/20		no data from the station
Sat, 9/19		no data from the station
Fri, 9/18		no data from the station
Thu, 9/17		no data from the station
Wed, 9/16		no data from the station
Tue, 9/15		no data from the station
Mon, 9/14		no data from the station
Sun, 9/13		no data from the station
Sat, 9/12		no data from the station
Fri, 9/11		no data from the station
Thu, 9/10		no data from the station
Wed, 9/9		no data from the station
Tue, 9/8		no data from the station
Mon, 9/7		no data from the station

Last 12 monthsa year earliermonth with days without data from the station

Last 12 months, monthly average: O₃ in µg/m³

Values as a table

Month	µg/m³	a year earlier	Note
October 2026 so far	too few readings	35.4	year before: same days · 6 days without data from the station
September 2026	too few readings	62.9	30 days without data from the station
August 2026	too few readings	83.8	31 days without data from the station
July 2026	too few readings	81.3	31 days without data from the station
June 2026	too few readings	82.4	30 days without data from the station
May 2026	too few readings	69.1	31 days without data from the station
April 2026	too few readings	62.5	30 days without data from the station
March 2026	too few readings	60.1	31 days without data from the station
February 2026	too few readings		28 days without data from the station
January 2026	too few readings		31 days without data from the station
December 2025	too few readings	too few readings	31 days without data from the station
November 2025	21.6	too few readings	measured in 85 % of hours · provisional · 3 days without data from the station

O₃ by year

Yardstick: EU limits (Directive 2008/50/EC)

Measure	2025	2024	2023
Days with 8-hour average above 120 µg/m³ (target value 25)	≥ 16²	≥ 21²	0²
Annual average, µg/m³	too few	58.9¹	too few
Highest 8-hour average, µg/m³	136August 13	151July 17	107July 24
Hours measured	67 %	86 %	67 %
Days without any reading from the station	101	24	24

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.

Sulphur dioxide SO₂

no measurement

Now

too few readings

Last 24 hours

measured in 0 % of hours

too few readings

Last 7 days

measured in 0 % of hours

too few readings

Last 30 days

measured in 0 % of hours

too few readings

Last 12 months

measured in 13 % of hours · provisional

Days in 2023: SO₂, daily average above 125 µg/m³

No measured day above the limit. 24 days without any reading from the station.

above the limit
below the limit
too few readings for the day
no SO₂ data in the EEA database
no data from the station

Months of 2023

Month	Average	Highest day	No readings
January	4	9	0
February	too few	12	1
March	8	10	0
April	8	10	0
May	8	9	0
June	too few	11	0
July	8	11	0
August	too few	6	4
September	too few	3	18
October	4	6	0
November	too few	6	1
December	5	7	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.

There are no readings for this period.

Last 7 days, every hour: SO₂ in µg/m³

no data from the station

Last 30 days, daily average: SO₂ in µg/m³

Values as a table

Day	µg/m³	Note
Tue, 10/6		no data from the station
Mon, 10/5		no data from the station
Sun, 10/4		no data from the station
Sat, 10/3		no data from the station
Fri, 10/2		no data from the station
Thu, 10/1		no data from the station
Wed, 9/30		no data from the station
Tue, 9/29		no data from the station
Mon, 9/28		no data from the station
Sun, 9/27		no data from the station
Sat, 9/26		no data from the station
Fri, 9/25		no data from the station
Thu, 9/24		no data from the station
Wed, 9/23		no data from the station
Tue, 9/22		no data from the station
Mon, 9/21		no data from the station
Sun, 9/20		no data from the station
Sat, 9/19		no data from the station
Fri, 9/18		no data from the station
Thu, 9/17		no data from the station
Wed, 9/16		no data from the station
Tue, 9/15		no data from the station
Mon, 9/14		no data from the station
Sun, 9/13		no data from the station
Sat, 9/12		no data from the station
Fri, 9/11		no data from the station
Thu, 9/10		no data from the station
Wed, 9/9		no data from the station
Tue, 9/8		no data from the station
Mon, 9/7		no data from the station

Last 12 monthsa year earliermonth with days without data from the station

Last 12 months, monthly average: SO₂ in µg/m³

Values as a table

Month	µg/m³	a year earlier	Note
October 2026 so far	too few readings	6.7	year before: same days · 6 days without data from the station
September 2026	too few readings	6.5	30 days without data from the station
August 2026	too few readings	6.1	31 days without data from the station
July 2026	too few readings	6.2	31 days without data from the station
June 2026	too few readings	10.5	30 days without data from the station
May 2026	too few readings	12.8	31 days without data from the station
April 2026	too few readings	8.9	30 days without data from the station
March 2026	too few readings	6.5	31 days without data from the station
February 2026	too few readings		28 days without data from the station
January 2026	too few readings		31 days without data from the station
December 2025	too few readings	too few readings	31 days without data from the station
November 2025	6.9	too few readings	measured in 82 % of hours · provisional · 3 days without data from the station

SO₂ by year

Yardstick: EU limits (Directive 2008/50/EC)

Measure	2025	2024	2023
Days above 125 µg/m³ (allowed 3)	0²	0²	0²
Hours above 350 µg/m³ (allowed 24)	0²	0²	0²
Hours above 500 µg/m³, three hours in a row (alert threshold)	0	0	0
Annual average, µg/m³	too few	4.8¹	too few
Highest daily average, µg/m³	15June 13	11December 20	12February 23
Highest hourly value, µg/m³	64August 8	33July 20	28June 25
Hours measured	67 %	85 %	70 %
Days without any reading from the station	101	24	24

The monitoring networks have not yet finally verified this year’s data. The EEA publishes verified values once a year.

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.

There is no allowed number for the warning and alert thresholds: every such hour or day is in red.

Compared with the new EU rules and the WHO recommendation

EU from 2030: daily 50 µg/m³, 18 days allowed. In 2023 there were 0 such days.
WHO 2021: daily 40 µg/m³, at most three to four days a year. In 2023 there were 0 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.

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: 314

1 outage, 7,538 hours in total in the last 12 months.

Timeline of outages from October 7, 2025 to today

From	To	Duration
Nov 27, 2025 20:00	still ongoing	314 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 Kosova Environmental Protection Agency ( KEPA). 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

All monitoring stations

How to cite this page

Name samoEKO as the source and link to this page. The readings come from official stations, so please credit them too.

Source: samoEKO, Air quality, AQMS Peje station, https://samoeko.com/en/luft/stanica/XK0005A, accessed 7 October 2026. Readings: official stations, via the European Environment Agency (EEA). The level is calculated by samoEKO.

Rules for reuse

samoEKO is a brand of samoLabs, Juelich.