Occupant Response 

  • Always call 911 if you have symptoms of CO poisoning.
  • Always call 911 if the CO detector alarm is sounding.

**Symptoms of Carbon Monoxide Poisoning**

Headaches

Nausea

Dizziness

Shortness of Breath

Confusion

* Effects of Various Carbon Monoxide Levels *

Carbon Monoxide Level in PPM Resulting Condition/Effect on Humans
9 The maximum allowable concentration for short term exposure in a living area according to the American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE).
35 Permissible exposure level for an 8-hour period according to federal law.
200 Slight headache, fatigue, dizziness, nausea in 2 to 3 hours
400 Headache and nausea after 1 to 2 hours. Life threatens after 3 hours.
800 Headache, dizziness, convulsions, and nausea in 45 minutes. Collapse and possibly death in 2 hours.
1600 Headache, dizziness, and nausea in 20 minutes. Collapse and possibly death in 1 hour.
3200 Headache, nausea, and dizziness in 5 to 10 minutes. Unconsciousness and danger of death in 30 minutes.
6400 Headache, nausea and dizziness in 1 to 2 minutes. Unconsciousness and danger of death in 10 to 15 minutes.
12800 Immediate effect unconsciousness. Danger of death in 1 to 3 minutes.

Last Edited: January 12, 2022