Photochemical Assessment Monitoring Stations(PAMS)

Note: EPA no longer updates this information, but it may be useful as a reference or resource.

What is PAMS?
In accordance with the 1990 Clean Air Act Amendments, EPA has required more extensive monitoring of ozone and its precursors in areas with persistently high ozone levels (mostly large metropolitan areas). In these areas, the States have established ambient air monitoring sites called Photochemical Assessment Monitoring Stations (PAMS) which collect and report detailed data for volatile organic compounds, nitrogen oxides, ozone and meteorological parameters. Analyses of these data are helping the Environmental Protection Agency and the States to better understand the underlying causes of ozone pollution, to devise effective remedies and to measure environmental improvement.

	General Information: Background, Objectives, Siting, Contacts		Data Analysis Support: Analysis Objectives, Analysis Guidance, Tools, Data Files
	Networks and Sites: Affected Areas, Maps, Status Report, Monitoring Frequencies Table		Publications, Papers, Reports: PAMS-Related Documents


The new version of AMDAS (V3.0) is now available; see http://www.environ.org/amdas/. PAMSGRAMs (notices for State and Local air pollution control agencies which highlight issues meriting attention by the PAMS monitoring staff) can be accessed from the Ambient Monitoring and Technology Information Center (AMTIC).

Photochemical Assessment Monitoring Stations(PAMS)

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