# Atmospheric Dispersion Steady State Concentration

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This equation models the general form of the Gaussian Atmospheric Dispersion equation as a function of downwind distance and stability class, meaning the dispersion in crosswind (y) and vertical (z) directions are Gaussian distributions.  The result is the steady-state concentration at a point (x,y,z) expressed in mug/m^3.
The effective stack height used is the physical stack's height (H) plus the plume rise (Delta h)