Air at the Zajecar station
Zaječar, Serbia
Network: Agency for Environmental Protection · Station code: RS0044A
In 2025
1 hour
with nitrogen dioxide (NO₂) above the EU hourly limit of 200 µg/m³.
18 hours are allowed in the whole year.
Highest hourly value: December 18, 2025, NO₂ 214 µg/m³, 1.1 times the hourly limit.
Daily average for 348 of 365 days · Yardstick: EU limits (Directive 2008/50/EC)
No data is arriving from this station
No reading has arrived from this station in 2026 so far.
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 in the archive: January 1, 2026 at 00:00
Measured then: NO₂ 53.1 µg/m³, SO₂ 68.2 µg/m³
Nearest station measuring now: Bor-Gradski park, Bor, Serbia, about 24 km away.
That reading is from another place. Your air may be better or worse.
How the air is changing
There are not enough readings to compare with the week before.
- NO₂: too few readings to compare
- SO₂: too few readings to compare
There are not enough readings to compare with the month before.
- NO₂: too few readings to compare
- SO₂: too few readings to compare
Show
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 21 % of hours · verified
Days in 2025: NO₂, at least one hour above 200 µg/m³
1 day above the limit. 3 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 2025
| Month | Days with an hour above 200 | Hours above 200 | Highest day | No readings |
|---|---|---|---|---|
| January | 0 | 0 | 55 | 0 |
| February | 0 | 0 | 46 | 0 |
| March | 0 | 0 | 50 | 0 |
| April | 0 | 0 | 30 | 0 |
| May | 0 | 0 | 16 | 0 |
| June | 0 | 0 | 16 | 0 |
| July | 0 | 0 | 21 | 0 |
| August | 0 | 0 | 25 | 0 |
| September | 0 | 0 | 25 | 0 |
| October | 0 | 0 | 39 | 0 |
| November | 0 | 0 | 31 | 1 |
| December | 1 above the number allowed | 1 | 60 | 2 |
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.
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 |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | too few readings | 15.9 | year before: same days · 6 days without data from the station |
| September 2026 | too few readings | 16.2 | 30 days without data from the station |
| August 2026 | too few readings | 15.6 | 31 days without data from the station |
| July 2026 | too few readings | 11.2 | 31 days without data from the station |
| June 2026 | too few readings | 11.5 | 30 days without data from the station |
| May 2026 | too few readings | 11.7 | 31 days without data from the station |
| April 2026 | too few readings | 17.7 | 30 days without data from the station |
| March 2026 | too few readings | 27.9 | 31 days without data from the station |
| February 2026 | too few readings | 25.4 | 28 days without data from the station |
| January 2026 | too few readings | 35.3 | 31 days without data from the station |
| December 2025 | 23.5 | measured in 81 % of hours · verified · 2 days without data from the station | |
| November 2025 | 18.8 | measured in 93 % of hours · verified · 1 day without data from the station |
NO₂ by year
Yardstick: EU limits (Directive 2008/50/EC)
| Measure | 2025 | 2024 |
|---|---|---|
| Hours above 200 µg/m³ (allowed 18) | 1 | 0² |
| Hours above 400 µg/m³, three hours in a row (alert threshold) | 0 | 0 |
| Annual average, µg/m³ (EU limit 40) | 19.5 | too few |
| Highest daily average, µg/m³ | 60December 18 | 51February 6 |
| Highest hourly value, µg/m³ | 214December 18 | 133January 31 |
| Hours measured | 95 % | 67 % |
| Days without any reading from the station | 3 | 0 |
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
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 2025 there were 4 such days.
- WHO 2021: daily 25 µg/m³, at most three to four days a year. In 2025 there were 81 such days.
- EU from 2030: annual average 20 µg/m³. Average in 2025: 19 µg/m³.
- WHO 2021: annual average 10 µg/m³. Average in 2025: 19 µg/m³.
Sources: Directive (EU) 2024/2881, Annex I; WHO global air quality guidelines 2021, table 0.1. Checked against the texts on 7 October 2026.
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 22 % of hours · verified
Days in 2025: SO₂, daily average above 125 µg/m³
No measured day above the limit. 3 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 2025
| Month | Days above 125 | Hours above 350 | Highest day | No readings |
|---|---|---|---|---|
| January | 0 | 0 | 78 | 0 |
| February | 0 | 0 | 69 | 0 |
| March | 0 | 0 | 42 | 0 |
| April | 0 | 0 | 26 | 0 |
| May | 0 | 0 | 16 | 0 |
| June | 0 | 0 | 16 | 0 |
| July | 0 | 0 | 11 | 0 |
| August | 0 | 0 | 8 | 0 |
| September | 0 | 0 | 8 | 0 |
| October | 0 | 0 | 38 | 0 |
| November | 0 | 0 | 29 | 1 |
| December | 0 | 0 | 54 | 2 |
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.
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 |
Values as a table
| Month | µg/m³ | a year earlier | Note |
|---|---|---|---|
| October 2026 so far | too few readings | 8.5 | year before: same days · 6 days without data from the station |
| September 2026 | too few readings | 6 | 30 days without data from the station |
| August 2026 | too few readings | 6.5 | 31 days without data from the station |
| July 2026 | too few readings | 8 | 31 days without data from the station |
| June 2026 | too few readings | 7.4 | 30 days without data from the station |
| May 2026 | too few readings | 10.6 | 31 days without data from the station |
| April 2026 | too few readings | 12.5 | 30 days without data from the station |
| March 2026 | too few readings | 25 | 31 days without data from the station |
| February 2026 | too few readings | 24.3 | 28 days without data from the station |
| January 2026 | too few readings | 44.9 | 31 days without data from the station |
| December 2025 | 21 | 29.8 | measured in 86 % of hours · verified · 2 days without data from the station |
| November 2025 | 15.9 | 25.2 | measured in 93 % of hours · verified · 1 day 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) | 0 | 0 | 0 |
| Hours above 350 µg/m³ (allowed 24) | 0 | 0 | 0 |
| Hours above 500 µg/m³, three hours in a row (alert threshold) | 0 | 0 | 0 |
| Annual average, µg/m³ | 16.5 | 17.1 | 19 |
| Highest daily average, µg/m³ | 78January 21 | 78January 31 | 87February 11 |
| Highest hourly value, µg/m³ | 161January 20 | 268January 31 | 271February 11 |
| Hours measured | 97 % | 97 % | 99 % |
| Days without any reading from the station | 3 | 0 | 0 |
■ 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
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 2025 there were 13 such days.
- WHO 2021: daily 40 µg/m³, at most three to four days a year. In 2025 there were 25 such days.
- EU from 2030: annual average 20 µg/m³. Average in 2025: 17 µg/m³.
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: 285
3 outages, 6,850 hours in total in the last 12 months.
Timeline of outages from October 7, 2025 to today
| From | To | Duration |
|---|---|---|
| January 1, 2026 or earlier | still ongoing | at least 279 days |
| Dec 8, 2025 12:00 | Dec 10, 2025 13:00 | 2 days |
| Nov 29, 2025 06:00 | Dec 2, 2025 22:00 | 4 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 Agency for Environmental Protection. 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.