II.4.3 Areas with deteriorated air quality

II.4.3.1 Areas with deteriorated air quality with regard to health protection

To delineate zones and agglomerations with deteriorated air quality in line with the Clean Air Act exceedences of limit values for annual average concentrations of PM₁₀, NO₂, lead, benzene,
benzo(a)pyrene, cadmium, arsenic and nickel were assessed for each station in accordance with the limit values and margins of tolerance set by the respective legislation. Exceedence frequencies of daily limit values for PM₁₀ and SO₂ were calculated, as also those of exceedence of hourly limit values of SO₂ and NO₂ and frequencies of exceedence of 8-hour limit values of CO and ground-level ozone.

The above mapping procedures were used for the preparation of the maps of spatial distribution of the respective air pollution characteristics presented in the previous subchapters. Areas with the values of air pollution characteristics higher than the respective limit Tab. II.4.26 brings the overview of areas in which the limit value for human health protection was exceeded in 2005, based on the results of mapping air pollution characteristics distribution. The exceedence percentage in the respective territory is also presented. Table II.4.25 summarises the areas of exceedences of limit values for human health protection increased by the margins of tolerance in 2005. The tables show the exceedence percentage of the respective limit values in the given territory for individual components and air pollution characteristics and summarize the areas in which at least one limit value of the given components was exceeded. The percentages of exceedences presented in the overview in Table II.4.26 correspond to the percentages of the territories of the given administrative unit in which at least one air pollution limit value of the set of limit values for the protection of health was exceeded. The map in Fig. II.4.61 depicts the delineation of areas with deteriorated air quality with regard to the limit values for the protection of health, excluding ozone, in 2005.

Table II.4.27 shows the 2005 exceedence of the target limit value for ozone for the protection of health in the areas of the Czech Republic and the share (%) of the respective territory. Ozone is presented separately, as it is evident that the measures aimed at the decrease of ozone concentrations exceeding the target limit value or the long-term air pollution targets, should be taken at the regional and national level.
The map in Fig II.4.62 presents the areas with deteriorated air quality with regard to health protection limit values incl. ozone.

II.4.3.2 Areas with deteriorated air quality with regard to the protection of ecosystems and vegetation

Based on the mapping of air pollution characteristics distribution for the year 2005 with regard to ecosystems and vegetation protection (Figs. II.4.51, II.4.52 and II.4.56) the distribution of air pollution limit values exceedences is shown for annual average concentrations of NO_x and annual and winter average SO₂ concentrations for the protection of ecosystems and vegetation.

The assessment of the respective limit values exceedences is carried out only for the territory defined for the protection of ecosystems and vegetation in accordance with the Government Order No. 350/2002 Coll., as amended. The final designation of areas with deteriorated air quality with regard to the limit values for SO₂ and NO_x for the protection of ecosystems/vegetation pursuant to the Clean Air Act No. 86/2002 Coll., as amended, for the year 2005 is shown in Fig. II.4.63.

Table II.4.28 shows the shares of exceedence of the limit values for the protection of ecosystems and vegetation in 2005 for individual limit values for NO_x, SO₂ and AOT40 for the territory defined by the legislation. It is evident that in 72 % of the territory defined for the protection of vegetation the target air pollution limit value for AOT40 is exceeded, due to exceeding ozone concentrations (Fig. II.4.59).

Tab. II.4.25 LV+MT exceedences in the zone/agglomerations and municipalities with extended competencies of the Czech Republic, % of area of the administrative unit, 2005

Tab. II.4.26 LV and TV exceedences in the zone/agglomerations and municipalities with extended competencies of the Czech Republic, % of area of the administrative unit, 2005

Tab. II.4.27 Target ozone limit value exceedences for the protection of health in the zone/agglomerations and municipalities with extended competencies of the Czech Republic, % of the area of the administrative unit, 2005

Tab. II.4.28 Shares of the territories for ecosystems and vegetation protection with the LV exceedence, % of the territory of the protected area, 2005

Fig. II.4.61 Areas with deteriorated air quality with regard to health protection limit values, ozone excluded, 2005

Fig. II.4.62 Areas with deteriorated air quality with regard to health protection limit values incl. ozone, 2005

Fig. II.4.63 Areas with deteriorated air quality with regard to SO₂ and NO_x limit values for the protection of ecosystems/vegetation, 2005

Fig. II.4.64 Areas with deteriorated air quality for ecosystems/vegetation, exceedence of limit value incl. AOT40, 2005