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Indiana Department of Environmental Management

Air Quality in Indiana > Redesignations and Maintenance Plans > Redesignations and Maintenance Plans: Lake and Porter Counties Lake and Porter Counties

2008 8-hour Ozone Standard
1997 8-hour Ozone Standard
Onroad Emissions MOBILE6.2 to MOVES

Annual Fine Particles (2011)
Annual Fine Particles (2008)
Onroad Emissions MOBILE6.2 to MOVES

Carbon Monoxide (2009)
Carbon Monoxide (1999)

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Public Notices Air Toxics Monitoring