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Have a nice summer!

Helsingin seudun ympäristöpalvelut (HSY)

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Air quality monitoring sites and annual nitrogen dioxide (NO2) averages in the Helsinki metropolitan area

Monitoring site data includes permanent monitoring sites, mobile monitoring sites and passive samplers, as well as the annual average concentrations (μg/m3) of nitrogen dioxide (NO2) measured at these sites in...

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Helsingin seudun ympäristöpalvelut (HSY)

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Air quality monitoring sites and annual nitrogen dioxide (NO2) averages in the Helsinki metropolitan area