PART 1Introduction

Interpretation2

1

In these Regulations—

  • “the 2021 Act” means the Environment Act 2021;

  • “the 2010 Regulations” means the Air Quality Standards Regulations 20102;

  • “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 PM2.53if 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”).