 
Note: CO exposure is
expressed in parts per million (ppm) over time.
Also see the CO Exposure chart for more information.
|
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What does parts per million mean?
CO EXPOSURE is
expressed in ppm... that is the number of molecules of CO
for every one million molecules of atmosphere.
Tolerances &
Levels of CO
| Invisible Exposure |
0 ppm to 9 ppm
(Not a health risk) |
0% to .0009% |
| |
10 ppm to 29 ppm
(Not an immediate health concern) |
.0010% to .0029% |
| |
30 ppm to 35 ppm
(Not an immediate health concern, minimal side
effects) |
.0030% to .0099% |
| Detector Alarms |
36 ppm to 99 ppm
(Will cause headaches & nausea, especially
to young children &elderly) |
.0100% (one, one hundredth %)
|
| Detector Alarms |
100 ppm
(Definite health concern) |
.0400% |
| Detector Alarms |
400 ppm
(Life threatening after 3 hours) |
(four, one hundredths %) |
|
