UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Office of Air Quality Planning and Standards Research Triangle Park, NC 27711

February 3, 2011

MEMORANDUM

SUBJECT: Supplemental Analysis of PM 10 Air Quality from Locations Evaluated by Zanobetti and Schwartz (2009)

FROM: Scott Jenkins, OAR/OAQPS/HEID /s/

TO: PM NAAQS Review Docket EPA-OAR-2007-0492

Overview

The purpose of this memorandum is to update the analysis of PM 10 air quality concentrations in locations evaluated in the epidemiological study by Zanobetti and Schwartz (2009 ). The analysis of these air quality concentrations was original ly reported by Schmidt and Jenkins (2 010). In that original analysis, PM 10 concentrations were reported in each study lo cation for all available years from 1999 to 2005 (the overall timeframe of the study). However, in some locations, Zanobetti and Sc hwartz (2009) evaluated associations with mortality in onl y a subset of the years 1999 to 2005. To better match the years for which Zanobetti and Schwartz evaluated associations with health effects, Table 1 below reports PM 10 concentrations for each study location, based only on th e years evaluated in that specific location.

The methods and monitors used to generate the air qua lity concentrations in Table 1 have been described previously (Schmidt and Jenkins, 20 10) and will not be re peated here. In some locations, appropriate PM 10 air quality data were not available for all of the years during which Zanobetti and Schwartz evaluated associations with mortality (e.g., because data completeness requirements, as described in Schmidt and Jenkins (2010), were not met). In these locations, we used the available PM 10 data that both met completeness requirements and overlapped with the study period for that location.2 Table 1. PM 10 Air Quality Concentrations in Location s Evaluated by Zanobetti and Schwartz (2009)

Study Area Years of Study Average of 3-year design values (μg/m 3 ) Average of 98 th percentile values (μg/m 3 )

Akron, OH 1999-2004 63 50 Albuquerque, NM 2000-2005 151 113 Allentown, PA 2000-2005 63 45 Atlanta, GA 1999-2005 128 74 Bakersfield, CA 1999-2005 184 121 Baltimore, MD 2000-2005 92 68 Birmingham, AL 1999-2005 154 122 Charleston, SC 1999-2005 59 42 Chicago, IL 2000-2005 113 91 Cincinnati, OH 1999-2004 88 60 Cleveland, OH 1999-2004 116 90 Columbia, SC 2002-2005 144 85 Columbus, OH 1999-2004 100 73 Davenport, IA 2000-2005 146 108 Davie, FL 1999-2005 50 39 Denver, CO 2000-2005 97 68 Des Moines, IA 2000-2005 95 66 Detroit, MI 2000-2005 165 105 Easton, PA 2000-2005 121 94 El Paso, TX 2000-2002 217 155 Erie, PA 2004-2005 56 42 Gary, IN 1999-2002 147 93 Harrisburg, PA 2000-2005 68 51 Los Angeles, CA 2000-2005 109 89 Louisville, KY 2001-2005 71 56 Memphis, TN 2001-2005 80 55 New Haven, CT 2001-2005 89 79 New York, NY 2000-2005 57 Omaha, NE 2000-2005 138 84 Phoenix, AZ 1999-2001 202 187 Pittsburgh, PA 2000-2005 139 112 Provo, UT 1999-2005 108 77 Raleigh, NC 2000-2005 58 45 Sacramento, CA 2000-2005 103 66 Salt Lake City 1999-2005 283 983 Study Area Years of Study Average of 3-year design values (μg/m 3 ) Average of 98 th percentile values (μg/m 3 )

Scranton, PA 2000-2005 65 47 Seattle, WA 1999-2005 46 Spokane, WA 1999-2002 98 73 St. Louis, MO 1999-2005 165 138 Steubenville, OH 1999-2003 104 83 Tampa, FL 1999-2002 112 78 Taylors, SC 2000-2005 59 47 Toledo, OH 2001-2003 72 61 Washington, PA 1999-2005 77 56 Wilkes-Barre, PA 2000-2005 69 49 Wilmington, DE 2000-2005 68 51 Winston, NC 1999-2005 60 47 Average across cities 110 77

References

Schmidt, M.; Jenkins S.M. (2010). Analyses of PM 10 and PM 10-2.5 Data for the PM NAAQS Review. Memorandum to PM NAAQS revi ew docket EPA-HQ-OAR-2007-0492.

Zanobetti A; Schwartz J. (2009). The effect of fine and coarse partic ulate air pollution on mortality: A national analysis. Environ H ealth Perspect, 117: 898-903.