Review of Air Quality Models for Particulate Matter API has published a review of existing source and receptor models available for analyzing particulate matt er (PM) concentrations. This report critically reviews existing air mo deling tools for PM, recommends models for State Implementation Plan applicat ions, and identifies areas where the models need improvement. If you woul d like API to provide you with a hard copy of this publication for a co st of please contact the Intellectual Property Department at API, 1200 Massachusetts Avenue NW, Suite 1100, Washington, DC 20001 - 5571; e - mail: apipubs@api.org; phone: 202 - 682 - 8156