Many people want to feel safe and secure by monitoring events and changes surrounding them that affect their quality of life. This concern prompted the development of the environment monitoring system. Among the many research groups, sensors and sensor network are their choice of tool for environment monitoring system. Data management is the most challenging issue when we are using sensor networks. To compose sensor network environment need various kind of sensors which does not have standard way to describe sensors and sensor data. In this paper, we will discuss the data management system for the distributed real-time emissions air pollutants monitoring system (DREAM). In this system, we will discuss sensor data modeling and usage of those data.