Technical Support Document for the
 

Interstate Air Quality Rule
 

Air Quality Modeling Analyses
 

Appendix H
 

PM2.5 Contributions to
 

Downwind Nonattainment Counties in 2010
 
The tables below show the contribution from the State-by-State zero-out modeling to annual 

average PM2.5 concentrations at nonattainment receptors in other States. In these tables "NA" 

indicates that the given nonattainment county is not downwind ofthat particular upwind source 

State. That is, the county is either located within the source State or within that portion of an 

adjacent State that shares a model grid cell with the source State. States denoted as "combined" 

indicate those States that were paired in zero-out runs. The combined State runs were performed 

for North Dakota with Vermont; Nebraska with Maine; and South Dakota with New Hampshire. 

The maximum downwind contribution from each ofthe three Plains States included in combined. 

runs(i.e., Nebraska, North Dakota, and South Dakota) was determined by indentifying the 

highest contribution to nonattainment counties in the Midwest. The maximum contribution from 

each ofthe three New England States included in combined runs (i.e., Maine, New Hampshire, 

andVermont) was determined by identifying the highest contribution to nonattainment counties 

in the Northeast. 

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Downwind 2010 Nonattainment Downwind PM2.5 Contributions (uglm3) from Upwind Source States based on 

Counties Zero-Out Modeling of 2010 S02+NOx Emissions. 

State Name County Name 2010 Base-1 AL AR CO CT DE FL GA IA IL IN KS KY LA MA MD/DC 

Case PM2.5 

(lJg/m3

) 

Alabama DeKalb County 15.24 NA 0.11 0.03 0.00 0.01 0.22 1.32 0.09 0.34 0.29 0.04 0.27 0.18 0.00 0.06 

Alabama Jefferson County 20.12 NA 0.12 0.03 0.00 0.01 0.26 0.82 0.10 0.33 0.25 0.05 0.25 0.25 0.00 0.05 

Alabama MontQomery County 15.72 NA 0.10 0.03 0.00 0.01 0.44 0.74 0.08 0.25 0.20 0.05 0.17 0.25 0.00 0.06 

Alabama Russell County 17.31 NA 0.10 0.03 0.00 0.01 0.52 1.52 0.09 0.28 0.23 0.05 0.19 0.22 0.00 0.07 

Alabama TaliadeQa County 16.46 NA 0.10 0.03 0.00 0.01 0.33 0.88 0.09 0.30 0.24 0.05 0.21 0.22 0.00 0.05 

Connecticut New Haven County 15.45 0.05 0.01 0.01 NA 0.06 0.03 0.08 0.04 0.15 0.13 0.01 0.08 0.03 0.21 0.15 

Delaware New Castle County 15.49 0.08 0.02 0.01 0.02 NA 0.03 0.11 0.05 0.19 0.18 0.02 0.11 0.04 0.04 0.57 

District of District of Columbia 15.35 0.12 0.03 0.01 0.01 0.10 0.04 0.15 0.06 0.24 0.23 0.02 0.16 0.05 0.02 NA 

Columbia 

Georaia Clarke County 17.05 0.75 0.10 0.03 0.00 0.02 0.27 NA 0.07 0.27 0.26 0.04 0.23 0.15 0.00 0.09 

GeorQia Clayton County 17.82 0.90 0.10 0.03 0.00 0.01 0.30 NA 0.07 0.26 0.23 0.04 0.20 0.16 0.00 0.07 

Georaia Cobb County 17.24 0.97 0.10 0.03 0.00 0.01 0.23 NA 0.08 0.28 0.26 0.04 0.24 0.16 0.00 0.06 

GeorQia DeKalb County 18.26 0.93 0.11 0.03 0.00 0.01 0.27 NA 0.08 0.27 0.25 0.04 0.22 0.17 0.00 0.08 

Georgia Floyd County 17.14 1.17 0.11 0.03 0.00 0.01 0.24 NA 0.09 0.33 0.30 0.05 0.25 0.18 0.00 0.07 

GeorQia Fulton County 19.79 0.99 0.11 0.03 0.00 0.01 0.28 NA 0.08 0.29 0.27 0.05 0.23 0.18 0.00 0.08 

Georgia Hall County 15.61 0.76 0.10 0.03 0.00 0.01 0.22 NA 0.07 0.26 0.25 0.04 0.23 0.15 0.00 0.08 

Georaia MuscoQee County 16.92 NA 0.10 0.03 0.00 0.01 0.51 NA 0.08 0.27 0.22 0.05 0.19 0.21 0.00 0.07 

GeorQia Paulding County 15.52 1.14 0.10 0.03 0.00 0.01 0.26 NA 0.08 0.29 0.26 0.04 0.22 0.17 0.00 0.06 

Georgia Richmond County 16.03 0.55 0.06 0.02 0.00 0.02 0.28 NA 0.06 0.22 0.21 0.03 0.18 0.12 0.00 0.09 

GeorQia Wilkinson County 16.89 0.65 0.07 0.02 0.00 0.02 0.37 NA 0.07 0.22 0.20 0.03 0.18 0.15 0.00 0.07 

Illinois Cook County 18.07 0.08 0.11 0.03 0.00 0.00 0.01 0.04 0.33 NA 0.79 0.11 0.22 0.08 0.00 0.00 

Illinois Madison County 16.48 0.11 0.27 0.04 0.00 0.00 0.02 0.07 0.43 NA 0.45 0.15 0.20 0.21 0.00 0.01 

Illinois St. Clair County 16.32 0.12 0.29 0.04 0.00 0.00 0.02 0.07 0.40 NA 0.50 0.15 0.22 0.22 0.00 0.01 

Illinois Will County 15.54 0.08 0.11 0.03 0.00 0.00 0.01 0.04 0.35 NA 0.76 0.09 0.18 0.09 0.00 0.00 

Indiana Clark County 15.79 0.43 0.12 0.03 0.00 0.00 0.06 0.34 0.19 0.84 NA 0.06 1.10 0.16 0.00 0.04 

Indiana Marion County 15.76 0.19 0.10 0.03 0.00 0.00 0.03 0.12 0.25 1.11 NA 0.07 0.43 0.13 0.00 0.02 

Kentucky Fayette County 15.05 0.42 0.10 0.03 0.00 0.00 0.07 0.38 0.17 0.71 0.80 0.05 NA 0.15 0.00 0.04 

Kentucky Jefferson County 15.71 0.42 0.12 0.03 0.00 0.00 0.06 0.35 0.19 0.85 NA 0.06 NA 0.16 0.00 0.04 

Maryland Baltimore city 16.53 0.10 0.03 0.02 0.01 0.10 0.04 0.14 0.06 0.24 0.23 0.02 0.16 0.05 0.02 NA 

Michigan Wayne County 18.76 0.10 0.06 0.02 0.00 0.00 0.03 0.08 0.16 0.70 0.57 0.05 0.24 0.06 0.00 0.01 

Missouri St. Louis city 15.26 0.12 0.27 0.04 0.00 0.00 0.02 0.07 0.38 1.50 0.45 0.14 0.21 0.21 0.00 0.01 

New York New York County 16.29 0.05 0.02 0.01 0.07 0.09 0.02 0.08 0.04 0.16 0.15 0.01 0.09 0.03 0.12 0.22 

North Carolina Davidson County 15.32 0.27 0.06 0.02 0.00 0.02 0.11 0.54 0.06 0.28 0.29 0.02 0.28 0.08 0.00 0.13 

North Carolina Mecklenburg County 15.07 0.33 0.06 0.02 0.00 0.02 0.14 0.74 0.06 0.25 0.26 0.02 0.24 0.09 0.00 0.12 

Ohio Butler County 15.87 0.24 0.08 0.02 0.00 0.00 0.04 0.19 0.16 0.75 0.91 0.05 0.60 0.11 0.00 0.03 
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Downwind 2010 Nonattainment Downwind PM2.5 Contributions (uglm3) from Upwind Source States based on 

Counties Zero-Out Modeling of 201 0 S02+NOx Emissions. 

State Name County Name 2010 Base-1 AL AR CO CT DE FL GA IA IL IN KS KY LA MA MD/DC 

Case PM2.5 

(~glm3)

Ohio Franklin County 16.45 0.20 0.06 0.02 0.00 0.00 0.04 0.17 0.14 0.59 0.67 0.04 0.50 0.09 0.00 0.04 

Ohio Hamilton County 17.57 0.32 0.09 0.03 0.00 0.00 0.05 0.26 0.18 0.83 1.06 0.06 0.77 0.13 0.00 0.04 

Ohio Jefferson County 17.69 0.15 0.04 0.01 0.00 0.01 0.04 0.15 0.10 0.39 0.39 0.03 0.29 0.07 0.00 0.07 

Ohio Lawrence County 15.19 0.26 0.06 0.02 0.00 0.00 0.05 0.28 0.12 0.49 0.54 0.03 NA 0.10 0.00 0.05 

Ohio Mahoning County 15.13 0.13 0.04 0.02 0.00 0.00 0.03 0.11 0.10 0.38 0.36 0.03 0.24 0.06 0.00 0.05 

Ohio Scioto County 18.02 0.30 0.08 0.02 0.00 0.D1 0.06 0.31 0.14 0.59 0.63 0.04 1.05 0.12 0.00 0.06 

Ohio Stark County 16.80 0.17 0.05 0.02 0.00 0.00 0.04 0.15 0.13 0.49 0.49 0.04 0.33 0.08 0.00 0.05 

Ohio Summit County 16.17 0.14 0.04 0.02 0.00 0.00 0.04 0.12 0.12 0.46 0.44 0.04 0.28 0.07 0.00 0.04 

Pennsylvania Allegheny County 18.86 0.17 0.05 0.02 0.00 0.02 0.04 0.19 0.11 0.43 0.43 0.03 0.35 0.08 0.00 0.20 

Pennsylvania Berks County 15.28 0.08 0.02 0.01 0.02 0.17 0.03 0.11 0.05 0.20 0.19 0.02 0.13 0.04 0.04 0.54 

Pennsylvania Lancaster County 15.27 0.09 0.03 0.02 0.02 0.09 0.03 0.13 0.06 0.23 0.22 0.02 0.15 0.05 0.04 0.68 

Pennsylvania York County 15.50 0.09 0.03 0.01 0.01 0.11 0.03 0.13 0.06 0.23 0.22 0.02 0.15 0.04 0.02 0.85 

Tennessee Davidson County 15.31 0.85 0.16 0.03 0.00 0.00 0.11 0.49 0.17 0.68 0.54 0.06 0.59 0.24 -0.00 0.03 

Tennessee Hamilton County 16.11 0.94 0.12 0.03 0.00 0.01 0.17 1.08 0.11 0.41 0.39 0.04 0.37 0.18 0.00 0.05 

Tennessee Knox County 18.16 0.77 0.13 0.03 0.00 0.01 0.18 0.98 0.13 0.51 0.51 0.05 0.54 0.18 0.00 0.07 

Tennessee Roane County 15.13 0.80 0.13 0.03 0.00 0.01 0.15 0.77 0.12 0.48 0.46 0.05 0.47 0.17 0.00 0.05 

Tennessee Sullivan County 15.06 0.43 0.09 0.02 0.00 0.01 0.11 0.57 0.10 0.41 0.43 0.04 0.48 0.11 0.00 0.06 

West Virginia Brooke County 16.28 0.13 0.04 0.01 0.00 0.01 0.03 0.14 0.09 0.36 0.36 0.03 0.27 0.06 0.00 0.07 

West Virginia Cabell County 15.98 0.28 0.07 0.02 0.00 0.01 0.06 0.31 0.13 0.51 0.54 0.03 0.67 0.10 0.00 0.07 

West Virginia Hancock County 16.37 0.13 0.04 0.01 0.00 0.01 0.03 0.13 0.09 0.36 0.36 0.03 0.27 0.06 0.00 0.07 

West Virginia Kanawha County 16.67 0.27 0.06 0.02 0.00 0.01 0.06 0.31 0.12 0.47 0.49 0.03 0.60 0.09 0.00 0.08 

West Virainia Wood County 15.85 0.23 0.06 0.02 0.00 0.01 0.05 0.25 0.13 0.49 0.53 0.03 0.52 0.09 0.00 0.08