Carbon monoxide

Health effects

Carbon monoxide is taken up by blood much more readily than oxygen so the presence of relatively small quantities of it in inhaled air can affect essential body processes. 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
• coal.

Major sources of carbon monoxide are:

Current standards

The current eight-hour standard limit for carbon monoxide is 9 parts per million (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.

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