Chemical Mass Balance (CMB) Model
The Chemical Mass Balance (CMB) Model EPA-CMBv8.2 is one of several receptor models that has been applied to air quality problems over the last two decades. Based on an effective-variance least squares method (EVLS), EPA has supported CMB as a regulatory planning tool through its approval of numerous State Implementation Plans (SIPs) which have a source apportionment component. CMB requires speciated profiles of potentially contributing sources and the corresponding ambient data from analyzed samples collected at a single receptor site. CMB is ideal for localized nonattainment problems and has proven to be a useful tool in applications where steady-state Gaussian plume models are inappropriate, as well as for confirming or adjusting emissions inventories. Guidance in their use may be found in Section 5.2.2 of the " Guideline on Air Quality Models".
|Chemical Mass Balance Model EPA-CMB8.2|
| Windows-based EPA-CMB8.2 represents the latest advancement in the CMB series and replaces CMB7. EPA-CMB8.2 has been subjected to peer review and is available for regulatory applications.
Response to Peer Review
Model Change Bulletin
Presentation with Demo (A&WMA's 98th Annual Conference, 23 June 2005; Minneapolis, MN)
Evaluation Data Sets
Test Data Set
Other Data Sets Formated for CMB Input
Portland Aerosol Characterization Study (PACS):
San Joaquin Valley Fine (SJVF):
Coastal Oxidant Assessment for Southeast Texas (COAST):
North American Research Strategy for Tropospheric Ozone (NARSTO):
Northern Front Range Air Quality Study (NFRAQS):
NFRAQS Executive Summary