What is the carbon monoxide exposure limit for one hour according to U.S National Ambient Air Quality Standards?

The carbon monoxide exposure limit for one hour according to U.S. National Ambient Air Quality Standards is set at 35 parts per million (ppm). This standard is established to protect public health, especially for vulnerable populations, including individuals with pre-existing health conditions, children, and the elderly. The one-hour limit is designed to minimize exposure to elevated carbon monoxide levels, which can lead to serious health effects such as impaired oxygen delivery to the body's tissues and organs. Establishing this specific limit assists regulatory agencies and environmental health specialists in monitoring air quality and implementing measures to reduce carbon monoxide emissions in urban areas, particularly those with heavy traffic or industrial activity. This standard is based on scientific research and health studies that identify the harmful effects of elevated carbon monoxide levels over short periods of time.