| 30 ppm | 0.003% | Threshold limit value (max. concentration which can be breathed in over a period of 8 hours) |
| 200 ppm | 0.02% | Light headache within 2 to 3 hours. |
| 400 ppm | 0.04% | Headache in forehead area within 1 to 2 hours, spreads to whole head area. |
| 800 ppm | 0.08% | Dizziness, nausea and tremors in limbs within 45 minutes. Unconscious within 2 hours. |
| 1600 ppm | 0.16% | Headache, nausea and dizziness within 20 minutes. Death within 2 hours. |
| 3200 ppm | 0.32% | Headache, nausea and dizziness within 5 to 10 minutes. Death within 30 minutes. |
| 6400 ppm | 0.64% | Headache and dizziness within 1 to 2 minutes. Death within 10 to 15 minutes. |
| 12800 ppm | 1.28% | Death within 1 to 3 minutes. |
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Make sure everyone has a Carbon Monoxide detector!
