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The Air Quality Standards Regulations (Northern Ireland) 2010

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Regulation 19(1)

SCHEDULE 3Target values

This schedule has no associated Explanatory Memorandum

Arsenic, cadmium, nickel and benzo(a)pyrene

PollutantTarget value for the total content in the PM10 fraction averaged over a calendar yearDate by which target value should be met
Arsenic6 ng/m331st December 2012
Cadmium5 ng/m331st December 2012
Nickel20 ng/m331st December 2012
Benzo(a)pyrene1 ng/m331st December 2012

Ozone

ObjectiveAveraging periodTarget value
(1)

The maximum daily eight-hour mean concentration shall be selected by examining eight-hour running averages, calculated from hourly data and updated each hour. Each eight-hour average so calculated shall be assigned to the day on which it ends, that is, the first calculation period for any one day will be the period from 17.00 hours on the previous day to 01.00 hours on that day, the last calculation period for any one day will be the period from 16.00 hours to 24.00 hours on the day.

(2)

If the three or five year averages cannot be determined on the basis of a full and consecutive set of annual data, the minimum annual data required for checking compliance with the target values will be valid data for one year in relation to the target value for the protection of human health and valid data for three years in relation to the target value for the protection of vegetation.

Protection of human healthMaximum daily eight hour mean(1)120 µg/m3 not to be exceeded on more than 25 days per calendar year averaged over three years(2)
Protection of vegetationMay to JulyAOT 40 (calculated from 1h values) 18,000 µg/m3.h averaged over five years(2)

PM2.5

Averaging periodTarget value
Calendar year25 µg/m3

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