Air Polluting Substances Submitted None Data Dictionary Vocabularies Eionet Data Dictionary Carbon monoxide Valid Data Dictionary Vocabularies Eionet Data Dictionary Air Polluting Substances Dioxins and furans Valid Data Dictionary Vocabularies Eionet Data Dictionary Air Polluting Substances Hydrogen chloride (HCl) Valid Data Dictionary Vocabularies Eionet Data Dictionary Air Polluting Substances Hydrogen fluoride (HF) Valid Data Dictionary Vocabularies Eionet Data Dictionary Air Polluting Substances NO2-for WIs with capacity > 6 tonnes/hr or new WIs: Nitrogen monoxide (NO) and nitrogen dioxide (NO2), expressed as NO2 Valid Data Dictionary Vocabularies Eionet Data Dictionary Air Polluting Substances NO2-for WIs with capacity ≤ 6 tonnes/hr: Nitrogen monoxide (NO) and nitrogen dioxide (NO2), expressed as NO2 Valid Data Dictionary Vocabularies Eionet Data Dictionary Air Polluting Substances NOx Valid Data Dictionary Vocabularies Eionet Data Dictionary Air Polluting Substances Sulphur dioxide (SO2) Valid Data Dictionary Vocabularies Eionet Data Dictionary Air Polluting Substances Total dust Valid Data Dictionary Vocabularies Eionet Data Dictionary Air Polluting Substances Gaseous and vaporous organic substances, expressed as total organic carbon (TOC) Valid Data Dictionary Vocabularies Eionet Data Dictionary Air Polluting Substances