ISKO
Information about air quality in the Czech Republic
SWRS - support table for announcement and cancellation of smog situations and regulations
Information on currently issued smog situations/regulations/alerts can be found here here
Updated: 2024-12-22 01:23 UTC
| ►PM10◄ | SO2 | NO2 | O3 |
| SWRS areas for PM₁₀ | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agglomeration of Prague | Central Bohemia region | South Bohemia region | ►Plzeň region◄ | Karlovy Vary region | Ústí nad Labem region | Liberec region | Hradec Králové region and Pardubice region | Vysočina region | South Moravia region without agglomeration of Brno | Agglomeration of Brno | Central Moravia region | Zlínský kraj | Moravia and Silezia zone | Agglomeration of Ostrava/Karviná/Frýdek-Místek without Třinec area Třinec area | Třinec region | |
| Situation | No situation | No situation | No situation | No situation | No situation | No situation | No situation | No situation | No situation | No situation | No situation | No situation | No situation | No situation | No situation | No situation |
| Warning | No problem | No problem | No problem | No problem | No problem | No problem | No problem | No problem | No problem | No problem | No problem | No problem | No problem | No problem | No problem | No problem |
PM₁₀(particles PM10) - Plzeň region
| Station | Announcement | Cancellation | h: | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Code | Name | Owner | Increasing trends - only informative** | conc. > 100 | conc. > 150 | Decreasing trends - only informative*** | conc. < 100 | conc. < 150 | |
| PPLVA | Plzen-Doubravka | CHMI | - | - | - | - | > 48 hrs | > 48 hrs | ► |
| PPLAA | Plzen-Slovany | MPl | - | - | - | - | > 48 hrs | > 48 hrs | ► |
| PPLLA | Plzen-Lochotin | MPl | - | - | - | - | > 48 hrs | > 48 hrs | ► |
| PPLEA | Plzen-stred | MPl | - | - | - | - | > 48 hrs | > 48 hrs | ► |
| Number of stations | 0/4 | 0/4 | 0/4 | 0/4 | 4/4 | 4/4 | |||
| 12h averages of PM10. The time is in UTC and corresponds to the end of the interval over which the concentration is averaged. | ||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | -1 | -2 | -3 | -4 | -5 | -6 | -7 | -8 | -9 | -10 | -11 | -12 | -13 | -14 | -15 | -16 | -17 | -18 | -19 | -20 | -21 | -22 | -23 | -24 | -25 | -26 | -27 | -28 | -29 | -30 | -31 | -32 | -33 | -34 | -35 | -36 | -37 | -38 | -39 | -40 | -41 | -42 | -43 | -44 | -45 | -46 | -47 | -48 | -49 | |
| 22.12. 01:00 | 22.12. 00:00 | 21.12. 23:00 | 21.12. 22:00 | 21.12. 21:00 | 21.12. 20:00 | 21.12. 19:00 | 21.12. 18:00 | 21.12. 17:00 | 21.12. 16:00 | 21.12. 15:00 | 21.12. 14:00 | 21.12. 13:00 | 21.12. 12:00 | 21.12. 11:00 | 21.12. 10:00 | 21.12. 09:00 | 21.12. 08:00 | 21.12. 07:00 | 21.12. 06:00 | 21.12. 05:00 | 21.12. 04:00 | 21.12. 03:00 | 21.12. 02:00 | 21.12. 01:00 | 21.12. 00:00 | 20.12. 23:00 | 20.12. 22:00 | 20.12. 21:00 | 20.12. 20:00 | 20.12. 19:00 | 20.12. 18:00 | 20.12. 17:00 | 20.12. 16:00 | 20.12. 15:00 | 20.12. 14:00 | 20.12. 13:00 | 20.12. 12:00 | 20.12. 11:00 | 20.12. 10:00 | 20.12. 09:00 | 20.12. 08:00 | 20.12. 07:00 | 20.12. 06:00 | 20.12. 05:00 | 20.12. 04:00 | 20.12. 03:00 | 20.12. 02:00 | 20.12. 01:00 | 20.12. 00:00 | |
3.3
|
3.4
|
3.9
|
4.4
|
4.8
|
5.3
|
6.4
|
6.7
|
7.4
|
7.6
|
7.8
|
7.9
|
8.2
|
8.9
|
8.7
|
8.5
|
9.1
|
9.9
|
9.5
|
9.7
|
10.0
|
9.6
|
9.4
|
9.3
|
9.0
|
8.1
|
8.1
|
8.0
|
7.4
|
6.0
|
5.7
|
5.1
|
4.1
|
4.2
|
4.3
|
4.6
|
5.3
|
5.6
|
6.1
|
6.7
|
8.0
|
8.4
|
8.7
|
9.0
|
9.2
|
9.0
|
8.8
|
8.5
|
8.1
|
8.5
|
◄ |
|
5.5
|
5.7
|
5.8
|
6.1
|
6.7
|
7.4
|
8.2
|
9.0
|
9.1
|
8.7
|
8.0
|
7.4
|
7.7
|
8.2
|
9.2
|
10.3
|
10.8
|
11.2
|
10.8
|
10.3
|
10.6
|
11.4
|
12.7
|
13.7
|
14.1
|
14.0
|
13.3
|
12.5
|
12.2
|
11.9
|
12.0
|
11.8
|
11.3
|
10.9
|
10.4
|
10.3
|
10.3
|
9.8
|
9.5
|
9.2
|
8.9
|
8.9
|
9.0
|
9.1
|
9.4
|
9.0
|
8.1
|
7.3
|
7.1
|
7.7
|
◄ |
|
4.2
|
4.5
|
4.9
|
5.3
|
5.7
|
6.0
|
6.2
|
6.4
|
6.6
|
6.7
|
6.7
|
6.8
|
6.8
|
6.9
|
6.9
|
6.9
|
6.8
|
6.7
|
6.7
|
6.9
|
7.0
|
7.2
|
7.3
|
7.4
|
7.3
|
7.0
|
6.7
|
6.5
|
6.1
|
5.8
|
5.4
|
5.0
|
4.5
|
4.1
|
3.8
|
3.3
|
3.0
|
2.7
|
2.5
|
2.3
|
2.1
|
1.9
|
2.4
|
3.1
|
3.7
|
4.3
|
4.5
|
4.8
|
5.1
|
5.4
|
◄ |
|
5.6
|
5.9
|
6.3
|
7.0
|
7.6
|
8.1
|
8.4
|
8.5
|
8.5
|
8.6
|
8.6
|
8.6
|
8.6
|
8.8
|
8.8
|
9.2
|
9.0
|
9.0
|
9.2
|
9.8
|
10.1
|
10.5
|
10.6
|
10.9
|
11.0
|
10.9
|
10.7
|
10.1
|
10.1
|
9.8
|
9.3
|
8.4
|
7.8
|
7.1
|
6.7
|
6.1
|
5.5
|
5.0
|
4.5
|
3.9
|
3.3
|
2.8
|
3.3
|
4.1
|
4.9
|
5.7
|
6.1
|
6.5
|
6.8
|
7.3
|
◄ |
- * Announcement of smog situation (regulation) is to be assessed if not issued yet. For more info see detailed legend (in Czech only).
- ** Number of consecutive hours with increasing trends of12h average of. Counted since12h average exceeded 75µg·m⁻³. For more info see detailed legend (in Czech only)
- *** Number of consecutive hours with decreasing trends of 12h average of PM₁₀. Counted only if 12h average exceeded value 75µg·m⁻³. before the first decreasing trend occurred. For more info see detailed legend (in Czech only).
Legend
| Color | Description |
|---|---|
| Exceedance of information threshold 100 µg·m⁻³ | |
| Exceedance od regulatory threshold 150 µg·m⁻³ | |
| No exceedance | |
| Missing data |
Notes
Smog situation for given region is announced in case when
- at least on half of the measurement stations representative for given region (or on all stations if there are just two of them) 12-hour average concentration of particulate matter PM10 exceeds information threshold value 100 µg.m⁻³
- and based on an evaluation of the forecast of meteorological conditions and pollution situation no decrease of the concentration below the information threshold value can be expected during the next 24 hours (i.e. concentrations exceeding the information threshold value are expected in next 24 hours on at least half of the stations (or on all stations if there are just two of them); these stations do not have to be the same as those on which information threshold value was exceeded at the time of announcement).
Regulation for given region is announced in case when
- at least on half of the measurement stations representative for given region (or on all stations if there are just two of them) 12-hour average concentration of particulate matter PM10 exceeds regulatory threshold value 150 µg.m⁻³
- and based on an evaluation of the forecast of meteorological conditions and pollution situation no decrease of the concentration below the regulatory threshold value can be expected during the next 24 hours (i.e. concentrations exceeding the regulatory threshold value are expected in next 24 hours on at least half of the stations (or on all stations if there are just two of them); these stations do not have to be the same as those on which regulatory threshold value was exceeded at the time of announcement).
Cancellation of regulation, smog situation
- Regulation / smog situation and is revoked if no measuring site representative for the given region reports the concentration of polluting substances above the corresponding threshold value and this state lasts continuously for at least 12 hours and no recurrent instance of exceeding the respective threshold value can be expected within the next 24 hours based on the meteorological forecast.
- 12-hour time interval is being reduced up to 3 hours in a case when meteorological conditions cannot be assessed as leading to the smog situation and recurrent instance of exceeding the respective threshold value can almost be excluded in the next 24 hours in accordance with the meteorological forecast.
