Has EPA compared the ambient concentrations estimates to actual monitored data?
In order to understand the overall performance and limitations of the modeled ambient concentration estimates, EPA compared these estimates to available monitoring data from 1996 as a “reality check.” EPA has done this for seven pollutants (benzene, perchloroethylene, formaldehyde, acetaldehyde, cadmium, chromium and lead). The comparisons generally show that the model estimates are lower than the monitored concentrations for these pollutants. Learn more about these comparisons.
