Learn the Issues

Bristol Bay 404(c) Timeline

Timeline of EPA actions with regard to potential mining activities within the Bristol Bay watershed.

Public involvement for the 2014 Bristol Bay 404c process

Public involvement activities associated with EPA's 2014 Proposed Determination to protect Bristol Bay watershed.

This section provides information on: current laws, regulations and guidance, policy and technical guidance, project-level conformity, general information, contacts and training, adequacy review of SIP submissions

2001 Limited Maintenance Plan for moderate PM10 and Attachment A

These documents provide guidance on maintenance plan submissions for certain moderate particulate matter (PM10) seeking redesignation to attainment.

Clarification of Transportation Conformity Requirements for FHWA/FTA Projects Requiring Environmental Impact Statements

This document clarifies how full compliance with the Clean Air Act transportation conformity requirements is to be achieved for FHWA and FTA projects requiring environmental impact statements (EIS).

Improving Air Quality Through Land Use Activities Announcement

This document provides guidance on where to find more information regarding improving air quality through land use activities.

EPA-DOT Memorandum of Understanding (MOU)

National Memorandum of Understanding Between the U.S. Department of Transportation and the U.S. Environmental Protection Agency (EPA Publication #EPA-420-F-00-020 and EPA-DOT Memorandum of Understanding (MOU) on Transportation Conformity.

Travel Efficiency Assessment Method: Three Case Studies

This slide presentation summarizes three case studies EPA conducted in partnership with Boston, Kansas City, and Tucson, to assess the potential benefits of employing travel efficiency strategies in these areas.

PM Hot-spot Modeling: Lessons Learned in the Field

This TRB Sunday Workshop slide presentation presents PM HOt-spot Modeling: Lessons Learned in the Field.

Overview of the PM Hot-spot Requirements and Guidance for Transportation Conformity

This slide presentation is an Overview of the PM Hot-spot Requirements and Guidance for Transportation Conformity.

1995 Limited Maintenance Plan for nonclassifiable CO Nonattainment Areas

These documents provide guidance on maintenance plan submissions for certain moderate particulate matter (PM10) seeking redesignation to attainment.

Guidance on Applicable Methodologies to Account for the Benefits of Infill in SIPs and Conformity Determinations

This document provides guidance regarding the use of the methodologies from ""Comparing Methodologies"" in preparing state implementation plans (SIP's) and transportation conformity determinations.