Environmental Health Air Quality Division   District of Columbia Municipal Regulations (DCMR) Chapter 1 - General* Chapter 2 - General and Non-attainment Area Permits* Chapter 3 - Operating Permits and Acid Rain Programs* Chapter 3 - Revisions* Chapter 4 - Ambient Monitoring and Emergency Procedures* Chapter 5 - Source Monitoring and Testing* Chapter 6 - Particulates* Chapter 7 - Volatile Organic Compounds* Chapter 8 - Asbestos, Sulfur and Nitrogen Oxides* Chapter 9 - Motor Vehicular Pollutants, Lead, Odors, and Nuisance Pollutants*   * This document is presented in Portable Document Format (PDF) and a PDF reader is required for viewing. Download a PDF reader or learn more about PDFs.    Click here to go back to fact sheets.