The ADMS-3 (Atmospheric Dispersion Modelling System) is an advanced atmospheric pollution dispersion model for calculating concentrations of atmospheric pollutants emitted both continuously from point, line, volume and area sources, or discretely from point sources. It was developed by Cambridge Environmental Research Consultants (CERC) of the UK in collaboration with with the UK Meteorological Office, National Power plc (now INNOGY Holdings plc) and the University of Surrey. The first version of ADMS was released in 1993. The current version, ADMS 5 Service Pack 1, was released in April 2013 with a number of additional features.