Schedule 5 Information and alert thresholds
Alert thresholds for Sulphur dioxide and Nitrogen dioxide
1 To be measured over three consecutive hours at locations representative of air quality over at least 100 km 2 or an entire zone, whichever is smaller. | |
| Pollutant | Alert threshold 1 |
|---|---|
| Sulphur dioxide | 500 µg/m3 |
| Nitrogen dioxide | 400 µg/m3 |
Information and alert thresholds for ozone
| Purpose | Averaging period | threshold |
|---|---|---|
| Information | 1 hour | 180 µg/m3 |
| Alert | 1 hour | 240 µg/m3 |