There are many UK companies operating processes which do not fall within Schedule A or B. The Clean Air Act 1993 contains provisions for a lower level of control of some smaller combustion plants. An example is the operation of a furnace- generally there is requirements for these to gain approval for grit and dust abatement measures and the height of the furnace chimney.

Other controls to air emissions which can be applied to a range of industrial, commercial and domestic premises, and vehicles are covered by Part III of the Environmental protection Act 1990 and the Clean Air Act 1993.

Part II of EPA 1990 provides for controls over statutory nuisance and gives the powers to local authorities (or individuals) to take action against any statutory nuisances, which include smoke emissions, dust, steam, odour or other offensive matter (effluvia) arising from industrial, trade or business premises.

The Clean Air Act 1993 prohibits dark smoke emissions from industrial and domestic chimneys and open bonfires. Industrial furnaces not provided for by Part I of EPA 1990 must only be installed if they can be operated continuously without emitting smoke. Under the Act, local authorities are entitled to collect information concerning air emissions from certain premises and can require operators to furnish such information.

Air quality standards for the UK, coupled with all EU member states, are now governed by EU Directives which prescribe limit values for concentrations of smoke or suspended particulates, sulphur dioxide, lead and nitrogen dioxide in ambient air throughout the EU. These Directives have been implemented in the UK by the Air Quality Standards Regulations 1989. They have now been re-emphasised by significant new initiatives under the Environment Act 1995.

Part IV of EA 1995 gives a framework for a system of air quality management that calls for local authorities form 1st April 1997 to assess air quality in their areas and prepare improvement plans where air quality standards are not met. Some local authorities have integrated their air quality monitoring facilities into the national network, which gives measurements of air pollution throughout the country.