§ Mr. Llew SmithTo ask the Secretary of State for the Environment what volumes of sewage wastes are treated annually by ultra-violet radiation.
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Air quality monitoring, carried out by the Department of the Environment, which provides information of relevance to health impacts: March 1993 Network Pollutants Number of Sites EC Directive and Basic Urban Smoke/sulphur dioxide 1268 EC Directive Nitrogen dioxide 17 EC Directive Lead 19 Enhanced Urban Network Nitrogen dioxide, sulphur dioxide carbon monoxide, ozone, particulates 18 Hydrocarbons 26 hydrocarbons (eg benzene) 13 TOMPS2 Air toxics (eg dioxins) 5 Rural Ozone 117 Rural Sulphur dioxide, nitrogen dioxide 3 Diffusion Tubes Nitrogen dioxide 11,000 Lead in Petrol Lead 16 Multi-Element Various metals 16 Other Urban Nitrogen dioxide (by chemiluminescence) 2 Sulphur dioxide (by UV fluorescence) 16 Carbon monoxide (by infra-red) 17 Ozone (by UV photometric) 2 1Some or all of the sites operated by Local Authorities on behalf of the Department of the Environment. 2Toxic Organic Micropollutants.
§ Mr. MacleanDetailed information is not held centrally. The issuing of consents to discharge ultra-violet irradiated sewage effluent is, in England and Wales, a matter for the National Rivers Authority.