# The Environmental Targets (Fine Particulate Matter) (England) Regulations 2022, Regulation 2: Interpretation


(1) In these Regulations—
“the 2021 Act” means the Environment Act 2021;
“the 2010 Regulations” means the Air Quality Standards Regulations 2010;
“ambient air” means outdoor air, excluding the air in workplaces where members of the public do not have regular access;
“AQSR monitoring station” means a monitoring station which is used to measure PM2.5 levels for the purposes of the 2010 Regulations;
“fixed measurement” means a measurement taken at a fixed location, either continuously or by sampling at regular intervals, to determine levels of PM2.5;
“minimum annual data capture requirement” has the meaning given in regulation 14(4);
“monitoring station” is to be interpreted in accordance with regulation 12(4);
“ratified” has the meaning given in regulation 14(5);
“year” means a calendar year;
“zone” means one of the zones or agglomerations into which England is divided for air quality monitoring purposes, as determined under regulation 4 of the 2010 Regulations.
(2) For the purposes of these Regulations—
(a) particulate matter is to be treated as meeting the definition of PM2.5if it passes through a size-selective inlet with a 50% efficiency cut-off at 2.5 micrometres aerodynamic diameter;
(b) a reference to the “level” of PM2.5means the mass concentration of PM2.5 measured in micrograms per cubic metre (“µg/m³”).

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Source: https://www.legislation.gov.uk/ukdsi/2022/9780348242959/regulation/2 (the official version)
Page: https://openlegislation.uk/draft-environmental-targets-fine-particulate-matter-england-regulations-2022/regulation-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.