The Utah Division of Air Quality (UDAQ) is progressing with the development of the Provo, Salt Lake, and Logan PM2.5 Serious Nonattainment State Implementation Plans (SIPs). It is currently determining through regional modeling, if the National Ambient Air Quality Standards (NAAQS) will be met by December 31, 2019. Recently, UDAQ has indicated its plans are to now present the draft PM2.5 Serious Nonattainment SIP documents during the December 2017 Utah Air Quality Board (AQB) meeting. Each major source should have the opportunity to review and comment on a Technical Support Document (TSD) which provides the source specific draft SIP conditions prior to the meeting.