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 |