The results indicate that all of sampling sites of Colgate - Palmolive (Thailand) Ltd. Measured on 17 and 30 April 2014 met the standard requirement. However, the recommendation for the workers the employer may provide cold water (10 - 15°C) and moisture fans nearby working areas especially the area where tends to be warm in order to reduce heat condition and increase ventilation. This strategy also encourages employer to work better.