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 exceedances 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. Exceedance frequencies of daily
limit values for PM10 and SO2 were calculated, as also those of exceedance of
hourly limit values of SO2 and NO2 and frequencies of exceedance 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 values (areas marked in red or
violet) delineate the areas with deteriorated air quality. Table
II.4.2.26
brings the overview of the areas in the Czech Republic, in which the level of
the limit values, and especially of the target values for human health
protection were exceeded in 2006, based on the results of mapping air pollution
characteristics distribution. The exceedance percentage in the respective
territory is also presented. Table II.4.2.25 summarises the areas of exceedances
of limit values+the margins of tolerance for human health protection in 2006.
The tables show the exceedance percentage of the respective limit values/target
values in the given territory for individual components and air pollution
characteristics, and summarize the areas in which at least one limit value/target
value of the given components was exceeded. The percentages of exceedances
presented in the overview in Table II.4.2.26 correspond to the percentages of
the territories of the given administrative unit in which at least one limit
value of the set of limit values for the protection of human health was exceeded.
The map in Fig. II.4.2.55 depicts the delineation of the areas with deteriorated
air quality with regard to limit values, and the map in Fig.
II.4.2.56 with
regard to the target values for the protection of human health in 2006.
Table II.4.2.27 shows the 2006 exceedance of the target 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
value or the long-term objectives, should be taken at the regional and national
level.
The map in Fig II.4.2.56 presents the areas with deteriorated air quality with
regard to target values for health protection (excluding ground-level ozone) and
in Fig. II.4.2.57 including ground-level ozone.
Tab. II.4.2.25 LV+MT exceedances in the
zones/agglomerations and municipalities with extended competencies of the Czech
Republic, % of area of the administrative unit, 2006
Tab. II.4.2.26 Limit value (LV) and target value
(TV) exceedances in the zones/agglomerations and municipalities with extended
competencies of the Czech Republic (excluding the ground-level ozone), % of area
of the administrative unit, 2006
Tab. II.4.2.27 Exceedances of the ozone target
limit value for the protection of health in the zones/agglomerations and
municipalities with extended competencies of the Czech Republic, % of the area
of the administrative unit, 2006
Fig. II.4.2.55 Areas with deteriorated air quality with regard to health
protection limit values, 2006
Fig. II.4.2.56 Areas with deteriorated air quality with regard to health
protection target values, ground-level ozone excluded, 2006
Fig. II.4.2.57 Areas with deteriorated air quality with regard to health
protection target values, incl. ground-level ozone, 2006
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
2006 with regard to ecosystems and vegetation protection (Figs.
II.4.2.45,
II.4.2.46 and
II.4.2.50) the distribution for annual and winter average
concentrations of SO2 and annual average NOx concentrations for the protection
of ecosystems and vegetation is depicted.
In 2006 none of the localities with monitoring stations, classified as rural,
recorded the exceedances of the limit values for SO2 and NOx for the protection
of ecosystems/vegetation. Fig. II.4.2.53 shows the field of the values of the
AOT40 exposure index for the years 2002–2006.
Table II.4.2.28 is presented for information. It shows the exceedances of the
NOx limit value and the AOT40 target value for the protection of ecosystems and
vegetation within the national parks and protected areas (% of the territory) in
2006. The values were calculated on the basis of the respective maps of air
pollution characteristics.
Tab. II.4.2.28 Exceedances of limit value (NOx)
and target value (AOT40) for the protection of ecosystems and vegetation within
NP and CHKO, % of the territory of NP+CHKO, 2006
