What Is A Normal Carbon Monoxide Level In Blood?
What Is A Normal Carbon Monoxide Level In Blood? Results are given as a percentage or as a decimal. These are the normal ranges for CO levels in the blood: Adults (nonsmokers): less than 2.3%, or 0.023. Adult smokers: 2.1% to 4.2%, or 0.021 to 0.042. What is a dangerous level of carbon monoxide in