# PM 2.5

# Air Quality Data Update 2007-2009 Design Values

The following is a brief summary of EPA's air quality update for PM 2.5 

# based on ambient monitoring data for the thr ee-year period, 2007-2009. During th is three-year period:

 Four of the original 39 areas designated nonattainment for the PM 2.5 

# NAAQS in April, 2005 (using 2001-2003 data) failed to meet the annual PM 2.5 

# NAAQS in 2007-2009. Twenty-nine of the original 39 nonattainment areas met the annual NAAQS in 2007- 2009. Six areas have insufficient data to allow a determination of compliance with respect to the annual PM 2.5 

# NAAQS in 2007-2009; in each of these six areas, one or more sites for which compliance cannot be determined for 2007-2009 clearly violated the NAAQS in a previous period (e .g., for 2006-2008). (Table 1a).

 Eighteen of the 31 areas or iginally designated nonatta inment for the 24-hour PM 2.5 

# NAAQS failed to meet the NAAQS with 2007- 2009 data. Nine of the original 31 nonattainment areas met the 24-hour PM 2.5 

# NAAQS in 2007-2009. The other four areas are shown to have incomplete data with respect to the 24-hour PM 2.5 

# NAAQS; in each of these four areas, one or more site s for which compliance cannot be determined for 2007-2009 clearly violated the NAAQS in a previous period (e.g., for 2006-2008). (Table 1b).

 No counties, outside of existing nonattainment areas, did not meet the PM 2.5 

# annual NAAQS in 2007-2009. (Table 2a).

 Five counties, outside of existing non attainment areas, did not meet the PM 2.5 

# 24-hour NAAQS for 2007-2009.

In 1997, EPA established the PM 2.5 

# NAAQS for the protectio n of public health. The annual standard was set at a leve l of 15.0 micrograms per cubic meter ( μ g/m 3 

# ) and the 24- hour standard was set at a level of 65 μ g/m 3 

# . In October 2006, the 24-hour PM 2.5 

# NAAQS was strengthened to 35 μ g/m 3



# . Air quality data from EPA’s Air Quality System (AQS) were used to calculate PM 2.5 

# design values. The specific calculations are explaine d in footnotes to the tables. Most of the data used for these calculations were obtained from AQS on January 29, 2011. Detailed 2007-2009 information (including design values for previ ous 3-year periods from 1999-2001) for all PM 2.5 

# FRM/FEM sites are available in the downloadable spreadsheet file.

For information concerning these data and/or calculations, contact: Mark Schmidt U.S. Environmental Protection Agency Air Quality Trends and Analysis Group (C304-01) Research Triangle Park, NC 27711 (919) 541-2416, (919) 541-3613 (FAX) Schmidt.mark@epa.gov

## Table 1a. Areas Previously Designated Nonattainment for the PM 2.5

## 1997 Annual NAAQS AQS Data Query: 01/29/2011; Last updated: 2/15/2011

Designated Area States EPA Regions Designation
Status 1 

### Classification 2007-2009 Annual Design Value

(μg/m 3 

### ) 2, 3 

### Met NAAQS? Clean Data Determination Date

Atlanta GA 4 nonattainment not applicable 13.5 4 see footnote 4
Baltimore MD 3 nonattainment not applicable 12.9 yes Birmingham AL 4 nonattainment not applicable 15.1 no Canton-Massillon O H 5 nonattainment not applicable incomplete incomplete Charleston W V 3 nonattainment not applicable 14.4 yes Chattanooga TN-GA-AL 4 nonattainment not applicable 12.7 4 see footnote 4 Chicago-Gary-Lake County IL-I N 5 nonattainment not applicable 13.5 yes 11/27/09 Cincinnati-Hamilton OH-KY-I N 4, 5 nonattainment not applicable 15.0 yes Cleveland-Akron-Lorain O H 5 nonattainment not applicable 14.4 yes Columbus O H 5 nonattainment not applicable 13.0 yes Dayton-Springfield O H 5 nonattainment not applicable 13.8 yes Detroit-Ann Arbor M I 5 nonattainment not applicable 14.1 yes Evansville I N 5 nonattainment not applicable 13.1 yes 11/27/09 Floyd County GA 4 nonattainment not applicable 13.3 yes Greensboro-Winston-Salem-High Point N C 4 nonattainment not applicable 13.0 yes 01/04/10 Harrisburg-Lebanon-Carlisle PA 3 nonattainment not applicable 13.2 yes 08/25/09 Hickory-Morganton-Lenoir N C 4 nonattainment not applicable 12.5 yes 01/05/10 Huntington-Ashland WV-KY-OH 3, 4, 5 nonattainment not applicable 14.3 4 see footnote 4 Indianapolis I N 5 nonattainment not applicable 14.3 yes Johnstown PA 3 nonattainment not applicable 13.4 yes 09/25/09
Knoxville TN 4 nonattainment not applicable 13.7 4 see footnote 4
Lancaster PA 3 nonattainment not applicable 13.8 yes 09/25/09 Libby MT 8 nonattainment not applicable 12.2 yes Liberty-Clairton PA 3 nonattainment not applicable 17.0 no Los Angeles-South Coast Air Basin CA 9 nonattainment not applicable 18.8 no Louisville KY-I N 4, 5 nonattainment not applicable 14.7 yes Macon GA 4 nonattainment not applicable 13.5 yes Martinsburg, WV-Hagerstown MD 3 nonattainment not applicable 14.0 yes 11/20/09 New York-N. New Jersey-Long Island N Y-NJ-C T 1, 2 nonattainment not applicable 13.9 yes 12/15/10 Parkersburg-Marietta WV-O H 3, 5 nonattainment not applicable 13.7 yes 11/20/09 Philadelphia-Wilmington PA-NJ-DE 2, 3 nonattainment not applicable 13.7 4 see footnote 4 Pittsburgh-Beaver Valley PA 3 nonattainment not applicable 14.3 yes Reading PA 3 nonattainment not applicable 12.6 yes 09/25/09 San Joaquin Valley CA 9 nonattainment not applicable 22.6 no St. Louis MO-I L 5, 7 nonattainment not applicable 14.1 yes Steubenville-Weirton OH-W V 3, 5 nonattainment not applicable 14.4 yes Washington DC DC-MD-V A 3 nonattainment not applicable 12.4 yes 01/12/09 Wheeling WV-O H 3, 5 nonattainment not applicable 13.4 yes 11/20/09 York PA 3 nonattainment not applicable 13.7 yes 09/25/09

Notes: 1. Area designation status as of January 25, 2011. 2. The level of the 1997 annual NAAQS for PM2.5 is 15.0 micrograms per cubic meter (μg/m3). The design value for the annual PM 2.5 NAAQS is the 3-year average annual mean concentration. 3. The design values shown here are computed for the latest design value period using Federal Reference Method or equivalent data reported by States, Tribes, and local agencies to EPA's Air Quality System (AQS) as of 1/29/2011. Concentrations flagged by States, Tribes, and local agencies as exceptional events (e.g., high winds, wildfires, volcanic eruptions, construction) and concurred by the associated EPA Regional Office are not included in thecalculation of these design values. 4. One or more sites in this area has violated the NAAQS prior to 2007-2009 and does not have a valid 2007-2009 design value(s) . Although a 2007-2009 arealevel design value is shown, the design value shown may not represent the worst 2007-2009 air quality in the area. Consequentl y, we have not used it to indicate "yes" or "no" in the Met NAAQS column.

## Table 1b. Areas Previously Designated Nonattainment for the PM 2.5 

## 2006 24-hour NAAQS AQS Data Query: 01/29/2011; Last updated: 2/15/2011

Designated Area States EPA Regions Designation Status 1 

## Classification 2007-2009 24- hour Design Value (μg/m 3 

## ) 2, 3 

## Met NAAQS? Allentown PA 3 Nonattainment not applicable 34 yes Birmingham AL 4 Nonattainment not applicable 34 yes Canton-Massillon OH 5 Nonattainment not applicable incomplete incomplete Charleston WV 3 Nonattainment not applicable 32 yes Chico CA 9 Nonattainment not applicable 59 no Cleveland-Akron-Lorain OH 5 Nonattainment not applicable 36 no Detroit-Ann Arbor MI 5 Nonattainment not applicable 35 yes Fairbanks AK 10 Nonattainment not applicable 57 no Harrisburg-Lebanon-Carlisle PA 3 Nonattainment not applicable 34 yes Imperial County CA 9 Nonattainment not applicable 21 4 

### see footnote 4 

### Johnstown PA 3 Nonattainment not applicable 32 yes Klamath Falls OR 10 Nonattainment not applicable 47 no Knoxville-Sevierville-La Follette TN 4 Nonattainment not applicable 29 yes Lancaster PA 3 Nonattainment not applicable 35 yes Liberty-Clairton PA 3 Nonattainment not applicable 50 no Logan UT-ID 8, 10 Nonattainment not applicable 40 no Los Angeles-South Coast Air Basin CA 9 Nonattainment not applicable 50 no Milwaukee-Racine WI 5 Nonattainment not applicable 37 no New York-N. New Jersey-Long Island NY-NJ-CT 1, 2 Nonattainment not applicable 33 4 

### see footnote 4 

### Nogales AZ 9 Nonattainment not applicable 31 yes Oakridge OR 10 Nonattainment not applicable 41 no Philadelphia-Wilmington PA-NJ-DE 2, 3 Nonattainment not applicable 32 4 

### see footnote 4 

### Pittsburgh-Beaver Valley PA 3 Nonattainment not applicable 37 no Provo UT 8 Nonattainment not applicable 50 no Sacramento CA 9 Nonattainment not applicable 49 no Salt Lake City UT 8 Nonattainment not applicable 48 no San Francisco Bay Area CA 9 Nonattainment not applicable 36 no San Joaquin Valley CA 9 Nonattainment not applicable 70 no Seattle-Tacoma WA 10 Nonattainment not applicable 46 no Steubenville-Weirton OH-WV 3, 5 Nonattainment not applicable 37 no Yuba City-Marysville CA 9 Nonattainment not applicable 42 no

Notes: 1. Area designation status as of January 25, 2011 . 2. The level of the 2006 24-hour NAAQS for PM2.5 is 35 micrograms per cubic meter (μg/m3). The design value for the 24-hour PM 2.5 NAAQS is the 3-year average 98th percentile concentration. 3. The design values shown here are computed for the latest design value period using Federal Reference Method or equivalent data reported by States, Tribes, and local agencies to EPA's Air Quality System (AQS) as of 1/29/2011 Concentrations flagged by States, Tribes, and local agencies as exceptional events (e.g., high winds, wildfires, volcanic eruptions, construction) and concurred by the associated EPA Regional Office are not included in the calculation of these design values. 4. One or more sites in this area has violated the NAAQS prior to 2007-2009 and does not have a valid 2007-2009 design value(s) . Although a 2007-2009 area-level design value is shown, the design value shown may not represent the worst 2007-2009 air quality in the are a. Consequently, we have not used it to indicate "yes" or "no" in the Met NAAQS column.

### Table 2a. Violating Sites in Areas not Previously Designated Nonattainment for the PM 2.5 

### 1997 Annual NAAQS AQS Data Query: 01/29/2011; Last updated: 2/15/2011

State County EPA Region 2007-2009 Annual Design Value (μg/m 3 

### ) 1, 2 

### Site ID POC CBSA

Notes: 1. The level of the 1997 annual NAAQS for PM2.5 is 15.0 micrograms per cubic meter (μg/m3). The design value for the annual PM 2.5 NAAQS is the 3-year average annual mean concentration. For 2007-2009, there were no violations of the PM2.5 annual standard outside of previously designed nonattainment areas

2. The design values shown here are computed for the latest design value period using Federal Reference Method or equivalent data reported by States, Tribes, and local agencies to EPA's Air Quality System (AQS) as of 1/29/2011. Concentrations flagged by States, Tribes , and local agencies as exceptional events (e.g., high winds, wildfires, volcanic eruptions, construction) and concurred by the associated EPA Regio nal Office are not included in the calculation of these design values.

### Table 2b. Violating Sites in Areas Not Previously Designated Nonattainment for the PM 2.5 

### 2006 24-hour NAAQS AQS Data Query: 01/29/2011; Last updated: 2/15/2011

State County EPA Region 2007-2009 24-hour Design Value

(μg/m 3 

### ) 1, 2 

### Site ID POC CBSA Arizona Pinal 9 40 040213013 NA Phoenix-Mesa-Scottsdale, AZ Iowa Muscatine 7 38 191390015 NA Muscatine, IA Nevada Washoe 9 39 320310016 NA Reno-Sparks, NV Oregon Lake 10 41 410370001 NA Washington Yakima 10 37 530770009 NA Yakima, WA

Notes:

2. The design values shown here are computed for the latest design value period using Federal Reference Method or equivalent data reported by States, Tribes, and local agencies to EPA's Air Quality System (AQS) as of 1/29/2011. Concentrations flagged by States, Tribes, and lo cal agencies as exceptional events (e.g., high winds, wildfires, volcanic eruptions, construction) and concurred by the associated EPA RegionalOffice are not included in the calculation of these design values. 1. The level of the 2006 24-hour NAAQS for PM2.5 is 35 micrograms per cubic meter (μg/m3). The design value for the 24-hour PM 2.5 NAAQS is th year average 98th percentile concentration.