This content has been archived on 04 Sep 2014, reason:
(New version data-and-maps/figures/carbon-monoxide-8-hour-mean-limit-value-for-the-protection-of-human-health-5 was published)
In the air quality directive (2008/EC/50), the EU has set a limit value for carbon monoxide (CO) for the protection of human health: the CO maximum daily 8-hour mean values may not exceed 10 milligrams per cubic metre (mg/m3).
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