The text on this page has been created from Hansard archive content, it may contain typographical errors.
Mr. Sedgemore
To ask the Secretary of State for the Environment at how many sites air pollution levels are monitored.
Mr. Trippier
[holding answer 24 November 1989]: Air pollution levels are monitored on behalf of the Department of the Environment, at 390 sites as follows:
| Pollutant | Sites |
| Ozone: | 17 |
| Carbon monoxide: | 6 |
| Nitrogen oxides: | 12 |
| Acid deposition: | 32 |
| Atmospheric hydrocarbons: | 2 |
| Trace gases: | 1 |
| Atmospheric chemistry: | 2 |
| Smoke/sulphur dioxide | |
| Directive sites: | 287 |
| Sulphur dioxide: | 7 |
| Lead: | 19 |
| Multi-element sites, including lead: | 5 |
| Total | 390 |