Regulation 11(7)
SCHEDULE 3Alert and information thresholds
This schedule has no associated Explanatory Memorandum
PART 1Alert thresholds for nitrogen dioxide and sulphur dioxide
| Nitrogen dioxide | 400 μg/m³ measured over three consecutive hours at locations representative of air quality over at least 100 km² or an entire zone or agglomeration, whichever is the smaller |
| Sulphur dioxide | 500 μg/m³ measured over three consecutive hours at locations representative of air quality over at least 100 km² or an entire zone, whichever is the smaller |
PART 2Alert and information thresholds for ozone
| Parameter | Threshold | |
|---|---|---|
(1) For the purposes of regulation 11 (action plans), exceedance of the 1 hour average in respect of the alert threshold is to be measured or predicted for three consecutive hours. | ||
| Alert threshold | 1 hour average(1) | 240 μg/m³ |
| Information threshold | 1 hour average | 180 μg/m³ |