THE ADMINISTRATOR OF THE ENVIRONMENTAL PROTECTION AGENCY

The Honorable James Allan Chairman of Coeur d'Alene P.O. Box 408 Plummer, Idaho 83851 Dear Chairman Allan: WA SHI N GTO N , D . C . 20460 

# tDE c . 1 8 2014

I would like to summarize the U.S. Environmental Protection Agency's recent action to address fine
particle pollution on your reservation. As required by the Clean Air Act, the EPA has determined which areas are meeting the national ambient-air-quality standards for fine-particle pollution and which areas must take steps to reduce emissions that contribute to violations of the standard. The EPA on December 14, 2012, strengthened the annual, health-based fine-particle standard from 15.0 micrograms per cubic meter**(~g/m )**  to 12.0**~g/m .**  Thousands of scientific studies have li nked exposure to these tiny particles- approximately I/30th the size of a human hair
- with serious health problems including premature death in people with heart and lung disease, nonfatal heart attacks and increased hospital admissions and doctor and emergency-room visits for respiratory and cardiovascular disease. I appreciate the information you and your staff have shared with the EPA throughout this process to assess fine-particle-pollution levels in communities across your reservation and the impact of emission sources that could be contributing to unhealthy air. After considering your recommendations , reviewing the most recent certified fine-particle air-quality data for your reservation and evaluating factors to assess contribution to nearby levels of fine-particle pollution, I have determined that no area within the Coeur d'Alene reservation violates the 2012 standard or contributes to a nearby violat ion of the standard. As a result, the EPA is designating all ofthe Coeur d'Alene reservation "unclassifiable/attainment. '' Because air
-quality monitoring for 2014 is nearly complete, the EPA, at a tribe ' s request, will evaluate the status of an area based on its annual fine
-particl e-monitoring data for 2012-14 . If you would like the EPA to re-evaluate any areas within your reservation, p lease submit complete, quality-assured and certified air-quality data for 2014 to the EPA by February 27,2015. I recognize that the EPA shares responsibility with the states and tribes for managing particle-pollution levels. Efforts by states and tribes to attain the 1997 and 2006 fme
-particle-pollution standards are already working to reduce unhealthy levels of fine
-particle pollution . In addition, current and upcoming federal standards and safeguards, including pollution-reduction rules for power plants, vehicles and fuels will ensure steady reductions of fine-particle pollution and will protect public health in communities across the nation.

This paper is pri n ted with vegetab l e -o il- based i nks and i s 100-percent postco n s um er recycled mate rial , chlorine -free-processed and recyclab le .Together we have made considerable p rogress in r educing fine-particle pollution. Nat ionwide monitored levels of fine-particle pollution have fallen 34 percent since 2000 when we first began such monitoring for particles of t hi s size. I am confide n t thi s progress w ill continue as we work towa rd our shared goa l of clean a i r .

For ad ditional information abo u t th ese designations , p l ease visit www.epa.gov/pmdesignations.