Annex I: Observed exceedances and annual statistics

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ANNEX I. Observed Exceedances and Annual Statistics

Observed exceedances of ozone threshold values and annual statistics in 1996 at individual monitoring stations reporting in the framework of the Council Directive 92/72/EEC on air pollution by ozone.

Information on ozone exceedances and concentrations for the individual stations reporting in the framework of the Ozone Directive over the period 1 January 1996 - 31 December 1996 is available in computer readable form only. Upon request a diskette containing the following tables is available:

Table I.1: Number of days on which exceedances of threshold values (180 µg/m3 and 200 µg/m3 for hourly values; 110 µg/m3 for 8-hourly values and 65 µg/m3 for daily values) were observed at reporting monitoring stations; period 1 January - 31 December 1996.

Table I.2: The longest period of consecutive days on which exceedances of threshold values were observed at reporting monitoring stations; period 1 January - 31 December 1996.

Table I.3: Average length (in days) of periods of consecutive days on which exceedances of threshold values were observed at reporting monitoring stations; period 1 January - 31 December 1996.

Table I.4: Annual statistics (percentiles and maximum values) of hourly and moving eight hourly ozone concentrations for reporting monitoring stations; all concentrations in µg/m3; period 1 January - 31 December 1996.

Table I.5: Annual statistics (averaged, 50-, 95- and 98- percentile values) of hourly NOx concentrations for reporting monitoring stations; all concentrations in µg/m3; period 1 January - 31 December 1996.

Table I.6: Annual statistics (averaged, 50-, 95- and 98- percentile values) of hourly NO2 concentrations for reporting monitoring stations; all concentrations in µg/m3; period 1 January - 31 December 1996.

Table I.7: Annual statistics (averaged, 50-, 95- and 98- percentile values) of daily VOC concentrations for reporting monitoring stations; all concentrations in µg/m3; period 1 January - 31 December 1996.

Notes to the Tables

Table I.1

Exceedances of the threshold value of 360 µg/m3 for hourly values has been observed in 1996 at 2 stations:

country station name & city date, time max conc (µg/m3)
Greece Liosia, Athens

Marousi

21 May 1996, 14.00

21 May 1996, 13.00

391

361

In Table I.1 it is also indicated when no exceedance of (one or more) threshold values was observed at the station. This information has not been submitted by the Member States and is inferred from the available data. In cases where the information was insufficient for an unambiguous answer a "?" is printed.

Explanations of headings of Table I.1:

column name explanation

1

codcou country code;

2

staname name of monitoring station;

3

incod code number of monitoring station;

4

ville city where station is located;

5

180 (1) number of days on which the 180 µg/m3 threshold values for 1h average concentrations has been exceeded;

6

200 (1) number of days on which the 200 µg/m3 threshold values for 1h average concentrations has been exceeded;

7

110 (8a) number of days on which the 110 µg/m3 threshold values for the non-overlapping 8 hourly values between 0.00-8.00, 8.00-16.00 and 16.00 and 24.00 has been exceeded;

8

110 (8b) number of days on which the 110 µg/m3 threshold values for the 8 hourly values between 12.00-20.00 has been exceeded;

9

65 (24) number of days on which the 65 µg/m3 threshold values for the 24 hourly values has been exceeded;

10

% 1h val percentage of valid 1h averaged values.

Table I.2:

Explanations of headings of Table I.2:

column name explanation

1

codcou country code;

2

staname name of monitoring station;

3

incod code number of monitoring station;

4

ville city where station is located;

5

180 (1) longest period (in days) during which the 180 µg/m3 threshold values for 1h average concentrations has been exceeded;

6

200 (1) longest period (in days) during which the 200 µg/m3 threshold values for 1h average concentrations has been exceeded;

7

110 (8a) longest period (in days) during which the 110 µg/m3 threshold values for the non-overlapping 8 hourly values between 0.00-8.00, 8.00-16.00 and 16.00 and 24.00 has been exceeded;

8

110 (8b) longest period (in days) during which the 110 µg/m3 threshold values for the 8 hourly values between 12.00-20.00 has been exceeded;

9

65 (24) longest period (in days) during which the 65 µg/m3 threshold values for the 24 hourly values has been exceeded;

10

% 1h val percentage of valid 1h average values.

Table I.3

Explanations of headings of Table I.3:

column name explanation

1

codcou country code;

2

staname name of monitoring station;

3

incod code number of monitoring station;

4

ville city where station is located;

5

180 (1) average length of period (in days) during which the 180 µg/m3 threshold values for 1h average concentrations has been exceeded;

6

200 (1) average length of period (in days) during which the 200 µg/m3 threshold values for 1h average concentrations has been exceeded;

7

110 (8a) average length of period during (in days) which the 110 µg/m3 threshold values for the non-overlapping 8 hourly values between 0.00-8.00, 8.00-16.00 and 16.00 and 24.00 has been exceeded;

8

110 (8b) average length of period (in days) during which the 110 µg/m3 threshold values for the 8 hourly values between 12.00-20.00 has been exceeded;

9

65 (24) average length of period (in days) during which the 65 µg/m3 threshold values for the 24 hourly values has been exceeded;

10

% 1h val percentage of valid 1h average values.

Table I.4

Explanations of headings of Table I.4:

column name explanation

1

codcou country code;

2

staname name of monitoring station;

3

incod code number of monitoring station;

4

ville city where station is located;

5

1h P50 50 percentile of hourly values (µg/m3);

6

1h P98 98 percentile of hourly values (µg/m3);

7

1h P99.9 99.9 percentile of hourly values (µg/m3) (additional information);

8

1h MAX maximum value of hourly value (µg/m3);

9

% 1h val percentage of valid 1h average values;

10

8h P50 50 percentile of eight hourly values (µg/m3, calculated as a moving average);

11

8h P98 98 percentile of eight hourly values (µg/m3);

12

8h P99.9 99.9 percentile of eight hourly values (µg/m3) (additional information);

13

8h MAX maximum value of eight hourly value (µg/m3);

14

% 8h val percentage of valid 8h average values (µg/m3).

Table I.5

Explanations of headings of Table I.5:

column name explanation

1

codcou country code;

2

staname name of monitoring station;

3

incod code number of monitoring station;

4

ville city where station is located;

5

AVER yearly averaged NOx concentration (µg/m3);

6

PARP50 50-percentile of hourly NOx concentration (µg/m3);

7

PARP90 90-percentile of hourly NOx concentration (µg/m3);

8

PARP95 95-percentile of hourly NOx concentration (µg/m3);

9

% val percentage of valid 1h average values.

Table I.6

Explanations of headings of Table I.6:

column name explanation

1

codcou country code;

2

staname name of monitoring station;

3

incod code number of monitoring station;

4

ville city where station is located;

5

AVER yearly averaged NO2 concentration (µg/m3);

6

PARP50 50-percentile of hourly NO2 concentration (µg/m3);

7

PARP90 90-percentile of hourly NO2 concentration (µg/m3);

8

PARP95 95-percentile of hourly NO2 concentration (µg/m3);

9

% val percentage of valid 1h average values.

Table I.7

Explanations of headings of Table I.7:

column name explanation

1

codcou country code;

2

staname name of monitoring station;

3

incod code number of monitoring station;

4

ville city where station is located;

5

AVER yearly averaged VOC concentration (µg/m3);

6

PARP50 50-percentile of hourly VOC concentration (µg/m3);

7

PARP90 90-percentile of hourly VOC concentration (µg/m3);

8

PARP95 95-percentile of hourly VOC concentration (µg/m3);

9

% val percentage of valid 24h average values.


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