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Air Quality Monitoring report 2021

Produced by the Infrastructure, Housing and Environment
Authored by Ricardo Energy & Environment and published on 26 May 2022
Cost: £16,224.00

Summary

This report presents the results for 2021 of an ongoing programme of air quality monitoring in Jersey, carried out by Ricardo Energy & Environment on behalf of the Natural Environment Department of the Government of Jersey.

Annual mean concentrations of Nitrogen Dioxide (NO2) did not exceed the EC Directive limit value of 40 µg m-3 at any of the diffusion tube sites. The diurnal pattern in concentrations of oxides of nitrogen at Halkett Place was similar to that observed in previous years. There was a clear peak in the early morning between 7am and 8am, with another slight peak in the afternoon rush hour. The morning peak is thought to reflect early activity of market retailers arriving to set-up for the day using refrigerated vehicles and daily refuse collections.

Annual mean NO2 concentrations at historic kerbside, roadside and urban background sites (Weighbridge, Georgetown, Beaumont, The Parade, Broad Street, and Le Bas) from 2004 onwards have been shown to be decreasing.

Each of the hydrocarbon sites provided annual means below that required of the EC Directive limit value for benzene (5 µg m-3 as an annual mean, to be achieved by 20104). Since the introduction of catalytic converters in 1991 and the limiting of benzene concentrations in petrol to 1% in the year 2000, ambient measured concentrations have declined in the UK .

The COVID-19 pandemic affected the deployment and collection of NO2 and hydrocarbon diffusion tubes. Local restrictions meant that the November 2020 deployment was not collected until February 2021 and so the January 2021 exposure was missed.


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