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SCHEDULE 1

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Regulation 6

SCHEDULE 1 Air quality standards

PART 1 Limit values for Group A pollutants

Benzene

Averaging period Limit value Attainment date
Limit value for the protection of human health Calendar year 5 μg/m³ 1st January 2010

Carbon monoxide

For the purposes of this table, the maximum daily 8-hour mean concentration shall be selected by examining 8-hour running averages, calculated from hourly data and updated each hour. Each 8-hour average so calculated shall be assigned to the day on which it ends, i.e. the first calculation period for any one day shall be the period from 17:00 on the previous day to 01:00 on that day; the last calculation period for any one day shall be the period from 16:00 to 24:00 on that day.

Averaging period Limit value
Limit value for the protection of human health Maximum daily 8-hour mean 10 mg/m³

Lead

Averaging period Limit value
Annual limit value for the protection of human health Calendar year 0.5 μg/m³

Nitrogen dioxide (NO2) and oxides of nitrogen (NOx)

Averaging period Limit value Attainment date
Hourly limit value for the protection of human health 1 hour 200 μg/m³ NO2, not to be exceeded more than 18 times a calendar year 1st January 2010
Annual limit value for the protection of human health Calendar year 40 μg/m³ NO2 1st January 2010
Annual limit value for the protection of vegetation Calendar year 30 μg/m³ NOx

PM10

Averaging period Limit value
24-hour limit value for the protection of human health 24 hours 50 μg/m³ PM10, not to be exceeded more than 35 times a calendar year
Annual limit value for the protection of human health Calendar year 40 μg/m³ PM10

Sulphur dioxide

Averaging period Limit value
Hourly limit value for the protection of human health 1 hour 350 μg/m³, not to be exceeded more than 24 times a calendar year
Daily limit value for the protection of human health 24 hours 125 μg/m³, not to be exceeded more than 3 times a calendar year
Limit value for the protection of ecosystems Calendar year and winter (1st October to 31st March) 20 μg/m³

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