# The Environmental Targets (Fine Particulate Matter) (England) Regulations 2022, Paragraph 1: Initial calculations


The following are to be calculated by 15th July 2023—
(a) the Population Exposure Indicator for the baseline period (“PEIbase”);
(b) the Population Exposure Indicator for each of the years 2019, 2020, 2021 and 2022;
(c) the Reference Indicator for each of the years 2019, 2020, 2021 and 2022;
(d) Δ for each of the years 2019, 2020, 2021 and 2022, where “Δ”, for a year, means the amount by which the Population Exposure Indicator for that year is greater or less than the Reference Indicator for that year.

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Source: https://www.legislation.gov.uk/ukdsi/2022/9780348242959/schedule/1/paragraph/1 (the official version)
Page: https://openlegislation.uk/draft-environmental-targets-fine-particulate-matter-england-regulations-2022/schedule-1/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.