Following are Requests for Redesignation and Maintenance Plans Indiana has submitted to United States Environmental Protection Agency (U.S. EPA) for Lake County, Indiana, listed by applicable National Ambient Air Quality Standard (NAAQS).
Carbon Monoxide (CO)
1971 8-Hour CO Standard
A small portion of the City of East Chicago (an area bounded by Columbus Drive on the north, the Indiana Harbor Canal on the west, 148th St. if extended, on the south, and Euclid Avenue on the east) makes up the Lake County area designated by U.S. EPA under the 1971 8-hour CO standard.
- Documents - October 15, 2009 to December 21, 1999 [ZIP]
- Federal Register Notice Concerning U.S. EPA Approval and Promulgation of Carbon Monoxide (CO) Limited Maintenance Plan, Lake County, Indiana (October 15, 2009)
- Carbon Monoxide (CO) Limited Maintenance Plan Update for Lake County, Indiana (January 12, 2009)
- Federal Register Notice Concerning U.S. EPA Approval, Carbon Monoxide (CO) Request for Redesignation and Limited Maintenance Plan, Lake County, Indiana (January 19, 2000)
- Request for Redesignation and Limited Maintenance Plan for Carbon Monoxide (CO) Attainment in Lake County, Indiana, Submittal-Transmittal Letter and Request for Redesignation and Limited Maintenance Plan (December 21, 1999)
- Enclosures A-F
Sulfur Dioxide (SO2)
1971 SO2 Standard
- Documents - September 3, 2013 to August 11, 2005 [ZIP]
- Federal Register Notice Concerning U.S. EPA Approval, Lake County Sulfur Dioxide (SO2) Limited Maintenance Plan Update (September 3, 2013)
- Sulfur Dioxide (SO2) Maintenance Plan Update for Lake County, Indiana (March 28, 2013)
- Federal Register Notice Concerning U.S. EPA Approval, Lake County Sulfur Dioxide (SO2) Request for Redesignation and Maintenance Plan (September 26, 2005)
- Lake County Sulfur Dioxide (SO2) Request for Redesignation and Maintenance Plan Submittal-Transmittal Letter and Request for Redesignation and Maintenance Plan Including Appendices A-C (August 11, 2005)
- Appendices D (modeling files) and E (public participation documents) are not available online. Interested parties should contact IDEM.
View requests for redesignation and maintenance plans specific to Lake and Porter Counties.