Prolonged exposure to carbon monoxide can cause tissue damage.
People suffering from cardiovascular disease are particularly at risk.
Sources Carbon monoxide is a widespread pollutant that comes from the combustion of carbon containing fuels such as petrol, gas, oil and coal. Major sources of carbon monoxide are motor vehicles, boilers, heating appliances, industrial equipment and incineration. The current eight hour standard limit for carbon monoxide is 9.0 ppm. Goal Maximum allowable exceedences should be one day a year for eight hour standard limit. Consequences Carbon monoxide levels have been consistently below standards in recent years and existing controls appear to be adequate.