Abstract: A system and method for detection and assessment of hazardous plumes includes at least one sensing station, the sensing station including at least one sensor for sampling a media and determining hazardous plume data. The hazardous plume data includes at least one hazardous plume component and quantitative data regarding the hazardous plume component, such concentration. A computing structure receives the hazardous plume data and determines a dispersion model including a future migration path of the plume. The dispersion model can also provide quantitative data regarding the hazardous plume component, such as the concentration associated with the projected plume as a function of time as well as the source location of the plume.