Maps & Charts

Explore CASTNET’s maps of ambient air concentrations, dry, wet, and total deposition.

Ambient Air Concentrations	Annual average ambient air concentrations of particles and gas measured at CASTNET sites.
Dry Deposition	Annual average dry deposition estimated with the TDep Measurement Model Fusion method using the measured air concentrations from CASTNET and modeled CMAQ deposition velocities and fluxes.
Wet Deposition	Annual average wet deposition estimated with the TDep Measurement Model Fusion method using the concentrations in precipitation and precipitation amounts measured by NADP/NTN and the modeled precipitation amounts estimated by the PRISM model.
Total Deposition	Annual average total deposition estimated with the TDep Measurement Model Fusion method that combine the dry deposition and wet deposition grids.