Open Access
Table 2
Maximum allowable concentrations for some indoor air contaminants.
| Contaminant | Maximum allowable concentration | Health effect when exposed beyond allowable concentration |
|---|---|---|
| Formaldehyde | 33 ppb (parts per billion) | Irritation of the eyes, nose and throat |
| Particulates (PM10) | 150 μg/m3 (24-hr) | Breathing/respiratory problems |
| Particulate (PM2.5) | 35 μg/m3 (24-hr) | Breathing/respiratory problems |
| Total Volatile Organic Compounds (TVOC) | 300 ppb (parts per billion) | Irritation of the eyes, nose and throat, nausea, difficulty in breathing |
| Carbon monoxide (CO) | 9 ppm (parts per million) (8-hr) | Headache, dizziness, weakness, nausea, vomiting |
| Carbon dioxide (CO2) | 1000 ppm (parts per million) | Headache, dizziness, restlessness, difficulty in breathing, tiredness |
| Ozone | 0.070 ppm (parts per million) (8-hr) | Increase in risk of respiratory diseases |
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