The environmental odor pollution emitted from different sources has undesirable impacts on communities' health and welfare in a way that caused increasing public worry and complains around the world. Pars Vegetable Oil Processing Plant (PVOPP) is located near populated residential areas in Tehran; hence, many people are exposed to the plant process annoying odor daily. In order to assess the odor annoying impacts on its nearby business centers a social survey has been applied. In the field area 200 questionnaires were intended to be filled out but 180 of them have been completed by the respondents (90%). Almost 98% of the respondents have perceived the odor from the outdoor source in their working places which is known as the industry by 78% of them. Among the respondents 42% of them have defined the odor as intolerable. Considering that industry has been recognized as the most important external parameter which affect the quality of working environments, the impact of this industrial unit on decreasing the quality level of working conditions is more obvious. The duration of presence in the working place and record of service are related to disorders in working activity and emotion and thus confirm the odor pollution impacts on the employees' efficiency.