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   Counties page > As in Conterminous US > As in east-central US

Arsenic in Counties of the East-Central US

La Salle Co.: As= 8.46 +/- 2.13 ppm Louisa Co.: As= 7.49 +/- 1.33 ppm Mercer Co.: As= 8.32 +/- 3.56 ppm Jasper Co.: As= 18.87 +/- 13.72 ppm Stark Co.: As= 15.48 +/- 3.47 ppm Newton Co.: As= 14.95 +/- 6.39 ppm Knox Co.: As= 12.54 +/- 5.44 ppm Marshall Co.: As= 9.78 +/- 1.90 ppm Livingston Co.: As= 9.84 +/- 2.03 ppm Des Moines Co.: As= 7.46 +/- 1.02 ppm Henderson Co.: As= 10.36 +/- 2.88 ppm Warren Co.: As= 6.71 +/- 2.10 ppm Wabash Co.: As= 6.25 +/- 1.37 ppm Iroquois Co.: As= 8.22 +/- 1.34 ppm Huntington Co.: As= 7.40 +/- 0.89 ppm Miami Co.: As= 8.76 +/- 1.20 ppm Ford Co.: As= 8.23 +/- 1.72 ppm Peoria Co.: As= 10.69 +/- 3.59 ppm Woodford Co.: As= 9.76 +/- 1.84 ppm Adams Co.: As= 10.68 +/- 0.94 ppm Wells Co.: As= 8.81 +/- 1.25 ppm White Co.: As= 5.59 +/- 1.35 ppm Cass Co.: As= 8.24 +/- 1.71 ppm Hardin Co.: As= 14.94 +/- 4.13 ppm Lee Co.: As= 8.28 +/- 1.30 ppm McLean Co.: As= 9.37 +/- 1.07 ppm Tazewell Co.: As= 8.16 +/- 1.42 ppm Carroll Co.: As= 6.47 +/- 0.93 ppm Benton Co.: As= 8.57 +/- 1.52 ppm Mercer Co.: As= 11.50 +/- 1.23 ppm Fulton Co.: As= 7.72 +/- 2.44 ppm Morrow Co.: As= 18.94 +/- 3.64 ppm Marion Co.: As= 16.22 +/- 4.70 ppm Auglaize Co.: As= 12.99 +/- 1.52 ppm Westmoreland Co.: As= 10.18 +/- 2.25 ppm Tuscarawas Co.: As= 9.26 +/- 1.77 ppm Grant Co.: As= 7.07 +/- 1.27 ppm Hancock Co.: As= 8.07 +/- 2.63 ppm McDonough Co.: As= 10.75 +/- 1.89 ppm Jefferson Co.: As= 10.86 +/- 1.03 ppm Knox Co.: As= 13.73 +/- 3.51 ppm Jay Co.: As= 10.44 +/- 1.45 ppm Blackford Co.: As= 9.53 +/- 1.53 ppm Howard Co.: As= 8.11 +/- 1.03 ppm Tippecanoe Co.: As= 9.92 +/- 5.35 ppm Logan Co.: As= 12.07 +/- 2.60 ppm Union Co.: As= 13.31 +/- 3.94 ppm Vermilion Co.: As= 9.56 +/- 3.02 ppm Shelby Co.: As= 14.72 +/- 1.49 ppm Washington Co.: As= 10.17 +/- 1.52 ppm Warren Co.: As= 10.94 +/- 1.68 ppm Coshocton Co.: As= 7.59 +/- 1.20 ppm Delaware Co.: As= 17.39 +/- 1.93 ppm Mason Co.: As= 5.39 +/- 1.84 ppm Harrison Co.: As= 10.51 +/- 1.92 ppm Clinton Co.: As= 5.41 +/- 0.64 ppm Tipton Co.: As= 6.65 +/- 0.56 ppm Champaign Co.: As= 7.10 +/- 1.76 ppm Brooke Co.: As= 8.50 +/- 1.04 ppm Madison Co.: As= 8.51 +/- 2.01 ppm Delaware Co.: As= 7.73 +/- 0.79 ppm Fountain Co.: As= 10.13 +/- 3.61 ppm Darke Co.: As= 11.56 +/- 2.53 ppm Bedford Co.: As= 7.09 +/- 1.67 ppm Logan Co.: As= 7.24 +/- 1.16 ppm Randolph Co.: As= 9.47 +/- 3.41 ppm Franklin Co.: As= 6.18 +/- 1.62 ppm Somerset Co.: As= 7.87 +/- 1.94 ppm Schuyler Co.: As= 4.68 +/- 1.22 ppm De Witt Co.: As= 8.36 +/- 0.76 ppm Piatt Co.: As= 8.17 +/- 1.51 ppm Licking Co.: As= 13.26 +/- 3.28 ppm Champaign Co.: As= 12.38 +/- 1.69 ppm York Co.: As= 6.22 +/- 2.07 ppm Guernsey Co.: As= 8.03 +/- 1.26 ppm Hamilton Co.: As= 5.83 +/- 0.80 ppm Montgomery Co.: As= 7.32 +/- 4.05 ppm Adams Co.: As= 7.71 +/- 3.13 ppm Miami Co.: As= 12.32 +/- 3.13 ppm Ohio Co.: As= 13.79 +/- 2.78 ppm Boone Co.: As= 5.27 +/- 0.67 ppm Belmont Co.: As= 14.82 +/- 4.66 ppm Muskingum Co.: As= 7.85 +/- 1.42 ppm Fulton Co.: As= 7.88 +/- 2.18 ppm Menard Co.: As= 8.63 +/- 2.19 ppm Vermillion Co.: As= 7.72 +/- 3.20 ppm Fayette Co.: As= 6.74 +/- 1.72 ppm Franklin Co.: As= 17.79 +/- 3.96 ppm Cass Co.: As= 4.69 +/- 1.00 ppm Madison Co.: As= 14.90 +/- 3.03 ppm Brown Co.: As= 4.44 +/- 0.86 ppm Henry Co.: As= 7.36 +/- 3.34 ppm Adams Co.: As= 4.95 +/- 1.24 ppm Macon Co.: As= 7.09 +/- 1.01 ppm Clark Co.: As= 11.04 +/- 2.05 ppm Marshall Co.: As= 13.40 +/- 1.71 ppm Greene Co.: As= 9.96 +/- 2.15 ppm Wayne Co.: As= 7.29 +/- 1.07 ppm Sangamon Co.: As= 8.79 +/- 2.19 ppm Noble Co.: As= 11.63 +/- 1.03 ppm Parke Co.: As= 5.10 +/- 1.35 ppm Hancock Co.: As= 18.07 +/- 8.49 ppm Fairfield Co.: As= 12.98 +/- 1.91 ppm Perry Co.: As= 10.40 +/- 3.16 ppm Marion Co.: As= 7.05 +/- 1.92 ppm Hendricks Co.: As= 5.14 +/- 0.76 ppm Montgomery Co.: As= 11.19 +/- 1.66 ppm Preble Co.: As= 9.74 +/- 2.18 ppm Edgar Co.: As= 6.02 +/- 1.80 ppm Douglas Co.: As= 5.73 +/- 0.88 ppm Morgan Co.: As= 9.81 +/- 4.61 ppm Monroe Co.: As= 12.97 +/- 1.84 ppm Putnam Co.: As= 6.58 +/- 1.27 ppm Greene Co.: As= 9.45 +/- 2.37 ppm Pike Co.: As= 6.77 +/- 2.00 ppm New Castle Co.: As= 7.39 +/- 6.15 ppm Christian Co.: As= 7.93 +/- 1.69 ppm Pickaway Co.: As= 13.88 +/- 1.97 ppm Moultrie Co.: As= 6.86 +/- 0.63 ppm Scott Co.: As= 6.53 +/- 1.17 ppm Fayette Co.: As= 5.42 +/- 0.59 ppm Rush Co.: As= 8.20 +/- 3.25 ppm Salem Co.: As= 6.40 +/- 1.72 ppm Morgan Co.: As= 12.42 +/- 1.51 ppm Atlantic Co.: As= 3.06 +/- 1.08 ppm Union Co.: As= 6.98 +/- 0.50 ppm Allegany Co.: As= 10.81 +/- 2.50 ppm Washington Co.: As= 5.63 +/- 3.05 ppm Garrett Co.: As= 8.81 +/- 3.08 ppm Cecil Co.: As= 5.24 +/- 2.00 ppm Wetzel Co.: As= 13.41 +/- 1.03 ppm Harford Co.: As= 3.87 +/- 1.16 ppm Monongalia Co.: As= 11.24 +/- 1.44 ppm Preston Co.: As= 11.27 +/- 6.94 ppm Baltimore Co.: As= 2.35 +/- 1.18 ppm Carroll Co.: As= 5.16 +/- 2.01 ppm Frederick Co.: As= 5.34 +/- 1.81 ppm Fayette Co.: As= 11.90 +/- 3.14 ppm Shelby Co.: As= 9.87 +/- 1.47 ppm Morgan Co.: As= 13.01 +/- 2.21 ppm Ralls Co.: As= 9.94 +/- 1.14 ppm Coles Co.: As= 5.84 +/- 1.05 ppm Hocking Co.: As= 11.32 +/- 2.47 ppm Shelby Co.: As= 6.38 +/- 3.33 ppm Mineral Co.: As= 11.51 +/- 2.04 ppm Washington Co.: As= 12.08 +/- 0.86 ppm Marion Co.: As= 12.77 +/- 1.37 ppm Johnson Co.: As= 7.87 +/- 2.46 ppm Morgan Co.: As= 5.99 +/- 1.38 ppm Berkeley Co.: As= 7.37 +/- 1.91 ppm Vigo Co.: As= 10.74 +/- 5.27 ppm Clay Co.: As= 8.46 +/- 4.00 ppm Tyler Co.: As= 13.14 +/- 1.16 ppm Pike Co.: As= 10.69 +/- 1.89 ppm Butler Co.: As= 8.45 +/- 1.23 ppm Warren Co.: As= 7.65 +/- 1.56 ppm Clinton Co.: As= 9.59 +/- 0.86 ppm Cumberland Co.: As= 7.95 +/- 3.14 ppm Athens Co.: As= 13.35 +/- 3.88 ppm Hampshire Co.: As= 10.53 +/- 2.41 ppm Franklin Co.: As= 8.28 +/- 1.30 ppm Montgomery Co.: As= 7.39 +/- 4.15 ppm Macoupin Co.: As= 9.20 +/- 4.98 ppm Greene Co.: As= 9.86 +/- 2.24 ppm Ross Co.: As= 12.72 +/- 1.83 ppm Jefferson Co.: As= 4.54 +/- 1.07 ppm Clark Co.: As= 6.91 +/- 2.11 ppm Pleasants Co.: As= 13.10 +/- 0.35 ppm Owen Co.: As= 7.29 +/- 1.52 ppm Harrison Co.: As= 17.25 +/- 5.53 ppm Frederick Co.: As= 8.56 +/- 2.39 ppm Decatur Co.: As= 10.38 +/- 1.31 ppm Taylor Co.: As= 14.48 +/- 2.60 ppm Doddridge Co.: As= 11.07 +/- 1.21 ppm Wood Co.: As= 11.01 +/- 0.78 ppm Kent Co.: As= 6.12 +/- 2.76 ppm Calhoun Co.: As= 12.13 +/- 4.02 ppm Vinton Co.: As= 8.77 +/- 2.06 ppm Ritchie Co.: As= 12.62 +/- 2.72 ppm Kent Co.: As= 4.75 +/- 1.69 ppm Cumberland Co.: As= 7.88 +/- 2.17 ppm Highland Co.: As= 8.31 +/- 2.36 ppm Baltimore City Co.: As= 1.92 +/- 0.33 ppm Howard Co.: As= 1.99 +/- 0.40 ppm Monroe Co.: As= 9.26 +/- 1.35 ppm Montgomery Co.: As= 3.16 +/- 1.33 ppm Bartholomew Co.: As= 12.06 +/- 2.34 ppm Brown Co.: As= 14.40 +/- 1.94 ppm Grant Co.: As= 6.77 +/- 1.51 ppm Cape May Co.: As= 5.44 +/- 2.16 ppm Loudoun Co.: As= 3.49 +/- 1.38 ppm Hamilton Co.: As= 9.25 +/- 2.66 ppm Ripley Co.: As= 7.65 +/- 2.32 ppm Dearborn Co.: As= 13.28 +/- 6.63 ppm Barbour Co.: As= 17.90 +/- 6.78 ppm Tucker Co.: As= 6.88 +/- 1.84 ppm Clermont Co.: As= 8.06 +/- 1.23 ppm Clarke Co.: As= 7.24 +/- 2.01 ppm Jersey Co.: As= 9.70 +/- 1.99 ppm Queen Annes Co.: As= 3.34 +/- 0.71 ppm Sullivan Co.: As= 9.36 +/- 2.67 ppm Brown Co.: As= 9.15 +/- 2.51 ppm Hardy Co.: As= 8.93 +/- 1.50 ppm Anne Arundel Co.: As= 4.58 +/- 1.74 ppm Lincoln Co.: As= 14.03 +/- 5.50 ppm Fayette Co.: As= 7.90 +/- 5.06 ppm Effingham Co.: As= 4.03 +/- 0.76 ppm Jackson Co.: As= 6.46 +/- 1.40 ppm Meigs Co.: As= 11.35 +/- 1.69 ppm Pike Co.: As= 16.91 +/- 8.96 ppm Jennings Co.: As= 8.49 +/- 2.39 ppm Wirt Co.: As= 9.95 +/- 0.60 ppm Crawford Co.: As= 7.67 +/- 1.93 ppm Jasper Co.: As= 9.48 +/- 2.43 ppm Greene Co.: As= 8.73 +/- 2.73 ppm Lewis Co.: As= 11.83 +/- 1.74 ppm Montgomery Co.: As= 7.41 +/- 4.36 ppm Boone Co.: As= 20.60 +/- 5.54 ppm Caroline Co.: As= 2.71 +/- 1.06 ppm Prince Georges Co.: As= 3.87 +/- 1.44 ppm Campbell Co.: As= 9.12 +/- 1.00 ppm Randolph Co.: As= 6.04 +/- 3.25 ppm Upshur Co.: As= 11.74 +/- 4.86 ppm Gilmer Co.: As= 9.77 +/- 1.43 ppm Shenandoah Co.: As= 8.05 +/- 1.50 ppm Kenton Co.: As= 11.88 +/- 2.32 ppm Jackson Co.: As= 10.28 +/- 0.93 ppm Jackson Co.: As= 13.72 +/- 4.99 ppm Fairfax Co.: As= 3.09 +/- 0.73 ppm Adams Co.: As= 13.65 +/- 4.98 ppm Calhoun Co.: As= 9.14 +/- 0.83 ppm Warren Co.: As= 6.65 +/- 1.44 ppm Gallia Co.: As= 8.11 +/- 1.80 ppm Ohio Co.: As= 25.71 +/- 2.96 ppm Mason Co.: As= 10.25 +/- 1.09 ppm Bond Co.: As= 9.24 +/- 2.49 ppm Scioto Co.: As= 11.31 +/- 2.30 ppm Fauquier Co.: As= 3.37 +/- 0.99 ppm Madison Co.: As= 8.28 +/- 2.47 ppm Sussex Co.: As= 4.84 +/- 4.96 ppm Warren Co.: As= 6.13 +/- 2.17 ppm Lawrence Co.: As= 12.85 +/- 4.75 ppm St. Charles Co.: As= 11.02 +/- 3.45 ppm Pendleton Co.: As= 8.77 +/- 1.84 ppm Talbot Co.: As= 3.32 +/- 0.54 ppm Prince William Co.: As= 2.49 +/- 0.88 ppm Roane Co.: As= 10.16 +/- 1.83 ppm Switzerland Co.: As= 14.17 +/- 5.40 ppm Clay Co.: As= 5.41 +/- 2.64 ppm Jefferson Co.: As= 14.56 +/- 8.36 ppm Knox Co.: As= 10.00 +/- 3.75 ppm Braxton Co.: As= 9.14 +/- 3.32 ppm Martin Co.: As= 11.63 +/- 6.43 ppm Daviess Co.: As= 10.44 +/- 7.48 ppm St. Louis Co.: As= 10.56 +/- 3.31 ppm Pendleton Co.: As= 9.64 +/- 1.94 ppm Rappahannock Co.: As= 2.20 +/- 0.59 ppm Gallatin Co.: As= 11.45 +/- 1.76 ppm Lawrence Co.: As= 11.81 +/- 3.10 ppm Richland Co.: As= 8.83 +/- 2.71 ppm Rockingham Co.: As= 7.73 +/- 1.67 ppm Lawrence Co.: As= 7.86 +/- 1.37 ppm Scott Co.: As= 46.79 +/- 16.29 ppm Page Co.: As= 6.12 +/- 1.73 ppm Bracken Co.: As= 7.06 +/- 0.86 ppm Marion Co.: As= 9.96 +/- 4.55 ppm Grant Co.: As= 12.59 +/- 2.25 ppm Washington Co.: As= 18.85 +/- 10.47 ppm St. Louis City Co.: As= 12.84 +/- 0.67 ppm Calvert Co.: As= 5.06 +/- 2.45 ppm Mason Co.: As= 19.18 +/- 11.22 ppm Carroll Co.: As= 10.71 +/- 0.69 ppm Greenup Co.: As= 11.04 +/- 3.32 ppm Clinton Co.: As= 14.73 +/- 3.38 ppm Pocahontas Co.: As= 8.42 +/- 1.76 ppm Webster Co.: As= 5.70 +/- 1.19 ppm Trimble Co.: As= 12.00 +/- 1.64 ppm Lewis Co.: As= 24.95 +/- 12.84 ppm Owen Co.: As= 12.09 +/- 3.65 ppm Franklin Co.: As= 6.53 +/- 1.70 ppm Charles Co.: As= 2.73 +/- 0.91 ppm Dorchester Co.: As= 4.36 +/- 1.86 ppm Culpeper Co.: As= 3.48 +/- 1.23 ppm Orange Co.: As= 14.86 +/- 5.61 ppm Putnam Co.: As= 10.34 +/- 1.43 ppm Clay Co.: As= 5.13 +/- 1.30 ppm St. Clair Co.: As= 12.41 +/- 4.37 ppm Madison Co.: As= 2.41 +/- 1.01 ppm Kanawha Co.: As= 7.07 +/- 1.90 ppm Robertson Co.: As= 8.04 +/- 1.10 ppm Wayne Co.: As= 9.72 +/- 1.77 ppm Clark Co.: As= 38.80 +/- 22.78 ppm Cabell Co.: As= 7.93 +/- 0.97 ppm Henry Co.: As= 13.38 +/- 3.84 ppm Stafford Co.: As= 2.02 +/- 0.47 ppm Highland Co.: As= 8.70 +/- 2.40 ppm Harrison Co.: As= 18.09 +/- 11.48 ppm Edwards Co.: As= 11.23 +/- 1.45 ppm Wabash Co.: As= 15.39 +/- 2.83 ppm Wicomico Co.: As= 2.77 +/- 0.88 ppm Nicholas Co.: As= 4.50 +/- 0.82 ppm Pike Co.: As= 28.71 +/- 10.29 ppm Gibson Co.: As= 43.81 +/- 20.50 ppm Dubois Co.: As= 31.16 +/- 12.51 ppm Fleming Co.: As= 27.06 +/- 8.06 ppm Oldham Co.: As= 37.52 +/- 15.33 ppm Monroe Co.: As= 10.79 +/- 5.32 ppm Washington Co.: As= 10.30 +/- 2.42 ppm St. Marys Co.: As= 4.01 +/- 1.79 ppm Boyd Co.: As= 9.85 +/- 1.00 ppm Carter Co.: As= 8.72 +/- 2.09 ppm Jefferson Co.: As= 6.29 +/- 2.09 ppm Scott Co.: As= 37.98 +/- 15.20 ppm Augusta Co.: As= 6.72 +/- 2.86 ppm Jefferson Co.: As= 14.39 +/- 5.08 ppm Greene Co.: As= 2.36 +/- 0.52 ppm Nicholas Co.: As= 12.14 +/- 2.40 ppm Worcester Co.: As= 2.58 +/- 0.64 ppm Crawford Co.: As= 16.26 +/- 5.54 ppm Harrison Co.: As= 9.49 +/- 1.00 ppm Wayne Co.: As= 5.98 +/- 2.69 ppm Floyd Co.: As= 13.21 +/- 3.72 ppm King George Co.: As= 2.44 +/- 0.32 ppm Rowan Co.: As= 14.87 +/- 5.98 ppm Orange Co.: As= 3.67 +/- 1.46 ppm Jefferson Co.: As= 30.22 +/- 18.55 ppm Spotsylvania Co.: As= 1.37 +/- 0.47 ppm Lincoln Co.: As= 7.44 +/- 1.45 ppm Franklin Co.: As= 20.94 +/- 4.38 ppm Bourbon Co.: As= 22.11 +/- 8.26 ppm Shelby Co.: As= 22.91 +/- 10.08 ppm Bath Co.: As= 24.26 +/- 10.38 ppm Somerset Co.: As= 3.05 +/- 0.76 ppm Westmoreland Co.: As= 4.83 +/- 1.53 ppm Albemarle Co.: As= 3.35 +/- 0.95 ppm Lawrence Co.: As= 4.79 +/- 2.05 ppm Greenbrier Co.: As= 9.71 +/- 4.36 ppm Elliott Co.: As= 6.24 +/- 0.82 ppm Perry Co.: As= 12.51 +/- 5.58 ppm Bath Co.: As= 8.37 +/- 3.28 ppm Fayette Co.: As= 5.49 +/- 2.36 ppm White Co.: As= 6.34 +/- 1.30 ppm Hamilton Co.: As= 6.65 +/- 0.70 ppm Caroline Co.: As= 2.72 +/- 0.97 ppm Warrick Co.: As= 20.99 +/- 11.83 ppm Boone Co.: As= 5.48 +/- 1.73 ppm Posey Co.: As= 14.56 +/- 10.00 ppm Randolph Co.: As= 5.40 +/- 0.83 ppm Perry Co.: As= 7.41 +/- 2.94 ppm Crawford Co.: As= 5.38 +/- 2.53 ppm Fayette Co.: As= 23.48 +/- 8.91 ppm Washington Co.: As= 8.72 +/- 3.70 ppm Spencer Co.: As= 11.60 +/- 6.60 ppm Meade Co.: As= 9.55 +/- 2.67 ppm Montgomery Co.: As= 19.99 +/- 5.52 ppm Vanderburgh Co.: As= 34.45 +/- 17.99 ppm Essex Co.: As= 4.35 +/- 1.61 ppm Louisa Co.: As= 1.78 +/- 1.11 ppm Spencer Co.: As= 18.22 +/- 6.71 ppm Anderson Co.: As= 22.18 +/- 10.52 ppm Ste. Genevieve Co.: As= 6.15 +/- 1.42 ppm Franklin Co.: As= 10.93 +/- 4.32 ppm Richmond Co.: As= 5.86 +/- 0.66 ppm Bullitt Co.: As= 12.35 +/- 4.07 ppm Morgan Co.: As= 4.63 +/- 1.04 ppm Clark Co.: As= 27.44 +/- 9.09 ppm Rockbridge Co.: As= 5.18 +/- 1.72 ppm St. Francois Co.: As= 7.68 +/- 2.18 ppm Menifee Co.: As= 9.15 +/- 3.34 ppm Nelson Co.: As= 2.46 +/- 0.38 ppm Breckinridge Co.: As= 6.87 +/- 1.40 ppm Northumberland Co.: As= 4.01 +/- 0.62 ppm Accomack Co.: As= 5.50 +/- 1.38 ppm Logan Co.: As= 6.22 +/- 1.75 ppm Hanover Co.: As= 1.97 +/- 0.97 ppm Hardin Co.: As= 5.69 +/- 2.22 ppm Fluvanna Co.: As= 2.45 +/- 1.00 ppm Jessamine Co.: As= 9.51 +/- 3.20 ppm Johnson Co.: As= 3.00 +/- 0.74 ppm Hancock Co.: As= 7.33 +/- 1.38 ppm Nelson Co.: As= 11.36 +/- 1.95 ppm Raleigh Co.: As= 12.19 +/- 6.69 ppm Henderson Co.: As= 9.33 +/- 2.75 ppm Mingo Co.: As= 5.71 +/- 2.06 ppm King and Queen Co.: As= 4.09 +/- 1.58 ppm Mercer Co.: As= 8.95 +/- 2.71 ppm Martin Co.: As= 1.89 +/- 0.55 ppm Alleghany Co.: As= 13.53 +/- 2.63 ppm Jackson Co.: As= 6.73 +/- 3.15 ppm Powell Co.: As= 22.02 +/- 18.95 ppm Daviess Co.: As= 6.52 +/- 1.15 ppm Madison Co.: As= 11.61 +/- 5.97 ppm Washington Co.: As= 7.39 +/- 1.41 ppm Gallatin Co.: As= 6.25 +/- 1.22 ppm King William Co.: As= 4.22 +/- 1.70 ppm Saline Co.: As= 5.73 +/- 0.44 ppm Perry Co.: As= 7.26 +/- 2.34 ppm Goochland Co.: As= 1.18 +/- 0.19 ppm Union Co.: As= 9.60 +/- 1.81 ppm Magoffin Co.: As= 3.71 +/- 0.58 ppm Summers Co.: As= 5.43 +/- 1.53 ppm Williamson Co.: As= 4.17 +/- 0.73 ppm Wolfe Co.: As= 5.15 +/- 1.86 ppm Estill Co.: As= 15.73 +/- 9.09 ppm Lancaster Co.: As= 3.68 +/- 0.53 ppm Amherst Co.: As= 2.56 +/- 0.47 ppm Botetourt Co.: As= 5.14 +/- 2.82 ppm Buckingham Co.: As= 1.99 +/- 0.58 ppm Wyoming Co.: As= 5.91 +/- 1.78 ppm Dent Co.: As= 4.41 +/- 1.48 ppm Middlesex Co.: As= 4.76 +/- 1.09 ppm Floyd Co.: As= 3.47 +/- 1.56 ppm Cumberland Co.: As= 0.97 +/- 0.32 ppm Pike Co.: As= 4.26 +/- 2.07 ppm Iron Co.: As= 6.87 +/- 1.25 ppm Ohio Co.: As= 6.20 +/- 1.53 ppm Larue Co.: As= 6.96 +/- 1.92 ppm Monroe Co.: As= 8.87 +/- 1.85 ppm Marion Co.: As= 9.95 +/- 1.96 ppm Lee Co.: As= 6.68 +/- 2.10 ppm Boyle Co.: As= 8.94 +/- 1.63 ppm Henrico Co.: As= 1.76 +/- 0.34 ppm Breathitt Co.: As= 3.26 +/- 0.90 ppm Powhatan Co.: As= 1.25 +/- 0.31 ppm McLean Co.: As= 7.30 +/- 0.82 ppm Craig Co.: As= 8.54 +/- 1.30 ppm Webster Co.: As= 9.15 +/- 1.24 ppm Madison Co.: As= 7.35 +/- 2.01 ppm Lincoln Co.: As= 7.91 +/- 1.40 ppm New Kent Co.: As= 2.49 +/- 0.66 ppm Grayson Co.: As= 5.39 +/- 1.33 ppm Bedford Co.: As= 1.52 +/- 0.52 ppm Cape Girardeau Co.: As= 6.43 +/- 0.55 ppm Reynolds Co.: As= 5.34 +/- 1.01 ppm Gloucester Co.: As= 4.24 +/- 1.14 ppm Johnson Co.: As= 6.20 +/- 1.02 ppm Union Co.: As= 5.66 +/- 0.93 ppm Pope Co.: As= 5.83 +/- 0.84 ppm Hardin Co.: As= 5.27 +/- 1.18 ppm Bollinger Co.: As= 7.63 +/- 1.55 ppm Mercer Co.: As= 7.68 +/- 1.69 ppm Jackson Co.: As= 4.77 +/- 1.28 ppm Hopkins Co.: As= 7.21 +/- 1.94 ppm Chesterfield Co.: As= 2.51 +/- 1.08 ppm Northampton Co.: As= 8.23 +/- 1.43 ppm Appomattox Co.: As= 1.71 +/- 0.40 ppm Casey Co.: As= 10.98 +/- 4.38 ppm McDowell Co.: As= 6.31 +/- 0.58 ppm Crittenden Co.: As= 6.89 +/- 1.42 ppm Mathews Co.: As= 5.13 +/- 0.62 ppm Owsley Co.: As= 7.44 +/- 1.99 ppm Rockcastle Co.: As= 5.41 +/- 2.69 ppm Buchanan Co.: As= 6.54 +/- 1.23 ppm Knott Co.: As= 3.05 +/- 0.95 ppm Amelia Co.: As= 1.10 +/- 0.49 ppm Charles City Co.: As= 1.97 +/- 0.35 ppm Taylor Co.: As= 8.57 +/- 1.39 ppm Giles Co.: As= 7.93 +/- 2.15 ppm Green Co.: As= 7.25 +/- 2.18 ppm James City Co.: As= 2.00 +/- 0.48 ppm Hart Co.: As= 4.24 +/- 1.18 ppm Perry Co.: As= 4.05 +/- 1.15 ppm Campbell Co.: As= 1.39 +/- 0.26 ppm Livingston Co.: As= 6.41 +/- 1.30 ppm Shannon Co.: As= 7.52 +/- 1.93 ppm Roanoke Co.: As= 7.52 +/- 3.51 ppm Muhlenberg Co.: As= 6.69 +/- 2.07 ppm Prince Edward Co.: As= 0.93 +/- 0.21 ppm Butler Co.: As= 4.89 +/- 0.86 ppm York Co.: As= 2.41 +/- 0.27 ppm Caldwell Co.: As= 6.72 +/- 0.65 ppm Montgomery Co.: As= 6.81 +/- 3.23 ppm Clay Co.: As= 5.70 +/- 1.78 ppm Pulaski Co.: As= 4.67 +/- 1.17 ppm Edmonson Co.: As= 4.63 +/- 0.81 ppm Tazewell Co.: As= 4.52 +/- 1.18 ppm Massac Co.: As= 7.52 +/- 1.56 ppm Laurel Co.: As= 5.26 +/- 1.52 ppm Alexander Co.: As= 7.29 +/- 1.37 ppm Pulaski Co.: As= 9.45 +/- 1.57 ppm Prince George Co.: As= 1.94 +/- 0.51 ppm Leslie Co.: As= 4.14 +/- 0.83 ppm Wayne Co.: As= 6.23 +/- 1.03 ppm Adair Co.: As= 6.00 +/- 1.25 ppm Dickenson Co.: As= 5.58 +/- 1.24 ppm Bland Co.: As= 9.12 +/- 3.43 ppm Nottoway Co.: As= 1.16 +/- 0.26 ppm Letcher Co.: As= 4.72 +/- 0.86 ppm Dinwiddie Co.: As= 2.21 +/- 0.72 ppm Scott Co.: As= 6.45 +/- 1.10 ppm Charlotte Co.: As= 1.18 +/- 0.24 ppm Surry Co.: As= 2.41 +/- 0.35 ppm Pulaski Co.: As= 3.96 +/- 1.67 ppm Franklin Co.: As= 1.77 +/- 1.17 ppm Ballard Co.: As= 13.01 +/- 3.23 ppm McCracken Co.: As= 12.24 +/- 3.52 ppm Wise Co.: As= 5.86 +/- 1.84 ppm Warren Co.: As= 6.35 +/- 1.87 ppm Russell Co.: As= 5.68 +/- 1.09 ppm Metcalfe Co.: As= 5.08 +/- 0.97 ppm Lyon Co.: As= 6.34 +/- 0.46 ppm Barren Co.: As= 6.85 +/- 1.11 ppm Christian Co.: As= 7.07 +/- 2.08 ppm Isle of Wight Co.: As= 2.29 +/- 0.29 ppm Russell Co.: As= 5.03 +/- 1.00 ppm Pittsylvania Co.: As= 1.21 +/- 0.60 ppm Stoddard Co.: As= 6.91 +/- 1.66 ppm Floyd Co.: As= 2.03 +/- 1.12 ppm Hampton : As= 2.72 +/- 0.25 ppm Lunenburg Co.: As= 1.24 +/- 0.24 ppm Sussex Co.: As= 1.96 +/- 0.52 ppm Carter Co.: As= 7.47 +/- 2.50 ppm Todd Co.: As= 6.33 +/- 2.17 ppm Logan Co.: As= 4.12 +/- 1.83 ppm Wythe Co.: As= 7.15 +/- 2.65 ppm Mississippi Co.: As= 9.08 +/- 1.27 ppm Marshall Co.: As= 6.52 +/- 1.06 ppm Halifax Co.: As= 1.76 +/- 0.56 ppm Knox Co.: As= 4.99 +/- 0.84 ppm Norfolk : As= 4.64 +/- 0.31 ppm Virginia Beach : As= 3.91 +/- 0.59 ppm Brunswick Co.: As= 1.39 +/- 0.41 ppm Harlan Co.: As= 5.15 +/- 1.66 ppm Smyth Co.: As= 3.59 +/- 0.80 ppm Trigg Co.: As= 6.14 +/- 1.35 ppm Wayne Co.: As= 3.97 +/- 1.61 ppm Southampton Co.: As= 2.50 +/- 0.67 ppm Whitley Co.: As= 4.42 +/- 1.12 ppm McCreary Co.: As= 3.02 +/- 0.72 ppm Bell Co.: As= 5.04 +/- 1.64 ppm Carlisle Co.: As= 9.05 +/- 1.66 ppm Graves Co.: As= 6.96 +/- 1.35 ppm Suffolk : As= 2.83 +/- 0.72 ppm Cumberland Co.: As= 6.18 +/- 1.24 ppm Allen Co.: As= 7.53 +/- 1.96 ppm Carroll Co.: As= 1.66 +/- 1.01 ppm Washington Co.: As= 4.63 +/- 1.79 ppm Butler Co.: As= 8.84 +/- 4.21 ppm Greensville Co.: As= 2.16 +/- 0.91 ppm Lee Co.: As= 7.57 +/- 2.24 ppm Mecklenburg Co.: As= 1.47 +/- 0.60 ppm Scott Co.: As= 7.25 +/- 2.08 ppm Oregon Co.: As= 7.44 +/- 1.45 ppm Clinton Co.: As= 4.03 +/- 1.45 ppm Simpson Co.: As= 7.45 +/- 1.22 ppm Patrick Co.: As= 1.25 +/- 0.29 ppm New Madrid Co.: As= 8.58 +/- 1.42 ppm Chesapeake : As= 4.63 +/- 0.98 ppm Henry Co.: As= 1.25 +/- 0.35 ppm Monroe Co.: As= 7.53 +/- 1.89 ppm Ripley Co.: As= 9.59 +/- 3.82 ppm Grayson Co.: As= 2.11 +/- 0.95 ppm Hickman Co.: As= 8.58 +/- 2.43 ppm Calloway Co.: As= 5.77 +/- 1.18 ppm Stewart Co.: As= 7.24 +/- 1.14 ppm Robertson Co.: As= 13.68 +/- 6.88 ppm Sumner Co.: As= 12.31 +/- 6.52 ppm Fulton Co.: As= 8.24 +/- 0.98 ppm Montgomery Co.: As= 9.82 +/- 3.50 ppm Macon Co.: As= 11.79 +/- 2.55 ppm Dunklin Co.: As= 15.11 +/- 5.84 ppm Pickett Co.: As= 3.84 +/- 1.08 ppm Clay Co.: As= 10.14 +/- 2.90 ppm Sullivan Co.: As= 3.94 +/- 0.82 ppm Johnson Co.: As= 3.31 +/- 0.73 ppm Scott Co.: As= 4.23 +/- 1.72 ppm Claiborne Co.: As= 6.37 +/- 1.77 ppm Hancock Co.: As= 7.03 +/- 1.89 ppm Hawkins Co.: As= 5.11 +/- 0.99 ppm Campbell Co.: As= 7.43 +/- 1.18 ppm Ashe Co.: As= 1.55 +/- 0.90 ppm Fentress Co.: As= 2.40 +/- 0.71 ppm Alleghany Co.: As= 1.57 +/- 0.65 ppm Surry Co.: As= 1.29 +/- 0.34 ppm Gates Co.: As= 3.81 +/- 1.01 ppm Camden Co.: As= 4.49 +/- 1.42 ppm Currituck Co.: As= 4.64 +/- 1.01 ppm Stokes Co.: As= 1.42 +/- 0.38 ppm Northampton Co.: As= 1.88 +/- 1.07 ppm Hertford Co.: As= 2.38 +/- 0.82 ppm Warren Co.: As= 2.24 +/- 1.14 ppm Vance Co.: As= 2.01 +/- 0.62 ppm Rockingham Co.: As= 2.04 +/- 0.42 ppm Granville Co.: As= 3.47 +/- 1.50 ppm Person Co.: As= 2.31 +/- 0.90 ppm Caswell Co.: As= 2.08 +/- 0.69 ppm Overton Co.: As= 4.33 +/- 1.34 ppm Jackson Co.: As= 12.17 +/- 4.34 ppm Halifax Co.: As= 2.31 +/- 0.76 ppm Carter Co.: As= 1.79 +/- 0.56 ppm Obion Co.: As= 7.98 +/- 2.63 ppm Lake Co.: As= 8.48 +/- 0.87 ppm Weakley Co.: As= 5.31 +/- 0.80 ppm Henry Co.: As= 4.81 +/- 0.96 ppm Randolph Co.: As= 7.10 +/- 2.25 ppm Clay Co.: As= 8.54 +/- 3.91 ppm Sharp Co.: As= 7.51 +/- 2.35 ppm Trousdale Co.: As= 14.78 +/- 5.37 ppm Cheatham Co.: As= 9.37 +/- 2.93 ppm Washington Co.: As= 3.30 +/- 0.78 ppm Wilkes Co.: As= 1.02 +/- 0.42 ppm Union Co.: As= 5.08 +/- 1.49 ppm Pemiscot Co.: As= 13.14 +/- 2.22 ppm Smith Co.: As= 6.98 +/- 2.33 ppm Grainger Co.: As= 4.51 +/- 1.09 ppm Greene Co.: As= 3.71 +/- 0.56 ppm Davidson Co.: As= 8.17 +/- 2.63 ppm Watauga Co.: As= 2.13 +/- 0.65 ppm Perquimans Co.: As= 3.99 +/- 1.27 ppm Morgan Co.: As= 4.17 +/- 2.95 ppm Houston Co.: As= 6.18 +/- 0.71 ppm Benton Co.: As= 6.10 +/- 1.05 ppm Wilson Co.: As= 6.92 +/- 2.58 ppm Chowan Co.: As= 3.24 +/- 0.59 ppm Hamblen Co.: As= 6.83 +/- 1.14 ppm Dickson Co.: As= 8.76 +/- 3.48 ppm Putnam Co.: As= 3.82 +/- 0.68 ppm Anderson Co.: As= 7.12 +/- 1.24 ppm Yadkin Co.: As= 1.68 +/- 0.85 ppm Avery Co.: As= 1.61 +/- 0.54 ppm Greene Co.: As= 8.26 +/- 3.54 ppm Franklin Co.: As= 3.08 +/- 0.84 ppm Forsyth Co.: As= 2.83 +/- 1.40 ppm Unicoi Co.: As= 2.74 +/- 0.58 ppm Lawrence Co.: As= 4.71 +/- 1.06 ppm Guilford Co.: As= 1.73 +/- 1.13 ppm Alamance Co.: As= 2.62 +/- 0.91 ppm Bertie Co.: As= 1.75 +/- 0.72 ppm Dare Co.: As= 2.16 +/- 0.72 ppm Humphreys Co.: As= 5.45 +/- 1.53 ppm Orange Co.: As= 3.54 +/- 0.74 ppm Durham Co.: As= 2.56 +/- 0.58 ppm Gibson Co.: As= 6.74 +/- 1.20 ppm Dyer Co.: As= 8.10 +/- 1.77 ppm Nash Co.: As= 3.21 +/- 1.63 ppm Jefferson Co.: As= 4.80 +/- 0.88 ppm Knox Co.: As= 6.26 +/- 2.45 ppm Cocke Co.: As= 3.00 +/- 1.06 ppm Cumberland Co.: As= 2.67 +/- 0.72 ppm Mitchell Co.: As= 1.50 +/- 0.53 ppm Edgecombe Co.: As= 3.88 +/- 2.41 ppm Carroll Co.: As= 5.61 +/- 1.86 ppm De Kalb Co.: As= 6.94 +/- 1.12 ppm Caldwell Co.: As= 2.64 +/- 1.62 ppm Rutherford Co.: As= 10.40 +/- 3.60 ppm Tyrrell Co.: As= 1.77 +/- 0.51 ppm Yancey Co.: As= 1.26 +/- 0.38 ppm White Co.: As= 4.06 +/- 1.30 ppm Wake Co.: As= 2.23 +/- 0.97 ppm Martin Co.: As= 2.93 +/- 1.40 ppm Madison Co.: As= 1.78 +/- 1.17 ppm Davie Co.: As= 1.30 +/- 0.43 ppm Iredell Co.: As= 1.88 +/- 0.69 ppm Williamson Co.: As= 15.39 +/- 5.76 ppm Roane Co.: As= 5.65 +/- 2.33 ppm Alexander Co.: As= 1.81 +/- 0.28 ppm Sevier Co.: As= 3.46 +/- 1.45 ppm Washington Co.: As= 1.81 +/- 0.42 ppm Davidson Co.: As= 3.94 +/- 2.88 ppm Mississippi Co.: As= 10.03 +/- 2.17 ppm Crockett Co.: As= 10.83 +/- 2.57 ppm Burke Co.: As= 2.49 +/- 0.95 ppm Craighead Co.: As= 6.98 +/- 2.32 ppm Hickman Co.: As= 8.30 +/- 4.31 ppm Cannon Co.: As= 11.04 +/- 2.83 ppm McDowell Co.: As= 1.38 +/- 0.71 ppm Lauderdale Co.: As= 7.43 +/- 1.94 ppm Independence Co.: As= 6.92 +/- 4.40 ppm Randolph Co.: As= 3.66 +/- 1.39 ppm Loudon Co.: As= 9.57 +/- 3.08 ppm Jackson Co.: As= 4.47 +/- 1.11 ppm Blount Co.: As= 7.41 +/- 2.59 ppm Chatham Co.: As= 5.79 +/- 2.40 ppm Wilson Co.: As= 2.96 +/- 1.74 ppm Rowan Co.: As= 2.73 +/- 2.29 ppm Warren Co.: As= 4.28 +/- 1.65 ppm Maury Co.: As= 11.24 +/- 6.68 ppm Decatur Co.: As= 7.00 +/- 2.55 ppm Perry Co.: As= 8.90 +/- 4.68 ppm Pitt Co.: As= 3.55 +/- 1.89 ppm Catawba Co.: As= 4.47 +/- 3.36 ppm Rhea Co.: As= 3.89 +/- 0.67 ppm Henderson Co.: As= 4.10 +/- 2.64 ppm Buncombe Co.: As= 0.76 +/- 0.19 ppm Haywood Co.: As= 9.01 +/- 4.92 ppm Van Buren Co.: As= 3.47 +/- 0.90 ppm Johnston Co.: As= 3.12 +/- 1.23 ppm Madison Co.: As= 2.42 +/- 1.47 ppm Haywood Co.: As= 1.07 +/- 0.41 ppm Bledsoe Co.: As= 3.39 +/- 1.01 ppm Meigs Co.: As= 5.44 +/- 1.61 ppm Beaufort Co.: As= 3.10 +/- 1.13 ppm Marshall Co.: As= 9.66 +/- 4.31 ppm Poinsett Co.: As= 8.33 +/- 2.83 ppm Coffee Co.: As= 6.30 +/- 3.18 ppm Hyde Co.: As= 1.87 +/- 0.58 ppm Bedford Co.: As= 9.06 +/- 1.85 ppm Swain Co.: As= 1.35 +/- 1.07 ppm Monroe Co.: As= 6.89 +/- 2.29 ppm Lewis Co.: As= 6.54 +/- 1.23 ppm Tipton Co.: As= 8.83 +/- 1.88 ppm Greene Co.: As= 2.09 +/- 0.49 ppm McMinn Co.: As= 7.41 +/- 1.69 ppm Lee Co.: As= 4.94 +/- 1.56 ppm Rutherford Co.: As= 1.45 +/- 0.80 ppm Wayne Co.: As= 2.97 +/- 1.20 ppm Chester Co.: As= 4.20 +/- 2.45 ppm Cleveland Co.: As= 2.69 +/- 0.94 ppm Harnett Co.: As= 3.31 +/- 0.86 ppm Lincoln Co.: As= 4.38 +/- 3.78 ppm Sequatchie Co.: As= 4.40 +/- 0.83 ppm White Co.: As= 6.84 +/- 2.22 ppm Grundy Co.: As= 3.79 +/- 0.92 ppm Jackson Co.: As= 1.21 +/- 0.73 ppm Mecklenburg Co.: As= 2.20 +/- 1.01 ppm Moore Co.: As= 5.49 +/- 2.64 ppm Montgomery Co.: As= 7.36 +/- 2.34 ppm Cabarrus Co.: As= 4.60 +/- 3.20 ppm Stanly Co.: As= 8.74 +/- 2.19 ppm Henderson Co.: As= 0.57 +/- 0.24 ppm Wayne Co.: As= 4.54 +/- 0.96 ppm Graham Co.: As= 2.36 +/- 1.45 ppm Hamilton Co.: As= 5.37 +/- 1.56 ppm Lawrence Co.: As= 9.06 +/- 3.12 ppm Giles Co.: As= 18.25 +/- 9.99 ppm Cross Co.: As= 7.07 +/- 1.53 ppm Woodruff Co.: As= 10.60 +/- 6.15 ppm Crittenden Co.: As= 9.39 +/- 1.53 ppm Hardeman Co.: As= 2.60 +/- 1.33 ppm Lenoir Co.: As= 2.54 +/- 0.99 ppm Hardin Co.: As= 5.36 +/- 2.58 ppm Transylvania Co.: As= 1.43 +/- 0.51 ppm Gaston Co.: As= 1.61 +/- 0.45 ppm Craven Co.: As= 2.30 +/- 1.11 ppm Moore Co.: As= 7.48 +/- 0.39 ppm Shelby Co.: As= 9.81 +/- 1.52 ppm Polk Co.: As= 0.83 +/- 0.36 ppm Fayette Co.: As= 3.22 +/- 1.94 ppm McNairy Co.: As= 5.42 +/- 2.44 ppm Lincoln Co.: As= 8.31 +/- 1.57 ppm Franklin Co.: As= 6.17 +/- 1.29 ppm Pamlico Co.: As= 3.87 +/- 1.42 ppm Bradley Co.: As= 8.05 +/- 1.82 ppm Macon Co.: As= 1.32 +/- 0.50 ppm Marion Co.: As= 4.55 +/- 0.86 ppm Sampson Co.: As= 2.38 +/- 1.12 ppm Cherokee Co.: As= 1.97 +/- 1.87 ppm Polk Co.: As= 4.45 +/- 2.02 ppm Cumberland Co.: As= 2.55 +/- 1.22 ppm Jones Co.: As= 1.69 +/- 0.72 ppm Carteret Co.: As= 4.32 +/- 2.61 ppm Greenville Co.: As= 1.83 +/- 0.84 ppm Hoke Co.: As= 3.35 +/- 0.79 ppm Anson Co.: As= 9.95 +/- 4.54 ppm Union Co.: As= 10.65 +/- 5.94 ppm Spartanburg Co.: As= 1.86 +/- 0.68 ppm Duplin Co.: As= 2.79 +/- 1.05 ppm Cherokee Co.: As= 2.97 +/- 1.66 ppm Richmond Co.: As= 5.39 +/- 1.66 ppm York Co.: As= 1.28 +/- 0.72 ppm Clay Co.: As= 1.03 +/- 0.19 ppm St. Francis Co.: As= 7.92 +/- 1.49 ppm Prairie Co.: As= 5.16 +/- 0.53 ppm Pickens Co.: As= 1.41 +/- 0.57 ppm Lancaster Co.: As= 3.38 +/- 1.33 ppm Oconee Co.: As= 1.17 +/- 0.48 ppm Scotland Co.: As= 4.10 +/- 1.76 ppm Lauderdale Co.: As= 6.06 +/- 1.79 ppm Rabun Co.: As= 1.39 +/- 0.65 ppm Limestone Co.: As= 7.28 +/- 2.01 ppm Alcorn Co.: As= 4.68 +/- 0.96 ppm Tippah Co.: As= 7.52 +/- 3.21 ppm De Soto Co.: As= 8.75 +/- 3.32 ppm Tishomingo Co.: As= 3.07 +/- 1.03 ppm Marshall Co.: As= 4.05 +/- 2.17 ppm Benton Co.: As= 3.22 +/- 1.16 ppm Towns Co.: As= 0.78 +/- 0.18 ppm Madison Co.: As= 6.28 +/- 1.19 ppm Jackson Co.: As= 4.55 +/- 1.35 ppm Fannin Co.: As= 2.07 +/- 1.26 ppm Murray Co.: As= 3.77 +/- 1.61 ppm Whitfield Co.: As= 7.42 +/- 3.26 ppm Catoosa Co.: As= 7.06 +/- 1.78 ppm Union Co.: As= 1.07 +/- 0.49 ppm Walker Co.: As= 4.86 +/- 0.79 ppm Dade Co.: As= 4.49 +/- 0.51 ppm Onslow Co.: As= 1.32 +/- 0.86 ppm Robeson Co.: As= 2.55 +/- 1.07 ppm Union Co.: As= 1.04 +/- 0.26 ppm Colbert Co.: As= 5.83 +/- 1.96 ppm De Kalb Co.: As= 4.02 +/- 1.82 ppm Bladen Co.: As= 1.57 +/- 0.70 ppm Gilmer Co.: As= 1.23 +/- 0.44 ppm Habersham Co.: As= 1.78 +/- 0.51 ppm Chester Co.: As= 0.74 +/- 0.34 ppm Anderson Co.: As= 1.73 +/- 0.53 ppm Chesterfield Co.: As= 5.22 +/- 2.91 ppm Marlboro Co.: As= 5.15 +/- 1.58 ppm White Co.: As= 1.72 +/- 0.43 ppm Laurens Co.: As= 0.97 +/- 0.41 ppm Lumpkin Co.: As= 1.13 +/- 0.33 ppm Pender Co.: As= 2.10 +/- 0.84 ppm Stephens Co.: As= 1.19 +/- 0.24 ppm Gordon Co.: As= 5.22 +/- 1.65 ppm Dillon Co.: As= 3.99 +/- 0.95 ppm Dawson Co.: As= 0.67 +/- 0.15 ppm Kershaw Co.: As= 3.56 +/- 0.97 ppm Fairfield Co.: As= 1.68 +/- 0.93 ppm Franklin Co.: As= 1.53 +/- 0.32 ppm Darlington Co.: As= 3.77 +/- 1.05 ppm Newberry Co.: As= 1.28 +/- 0.49 ppm Hall Co.: As= 1.30 +/- 0.39 ppm Hart Co.: As= 2.74 +/- 1.15 ppm Banks Co.: As= 1.37 +/- 0.20 ppm Abbeville Co.: As= 1.36 +/- 0.30 ppm Columbus Co.: As= 2.10 +/- 1.16 ppm Greenwood Co.: As= 2.42 +/- 1.66 ppm New Hanover Co.: As= 3.67 +/- 1.49 ppm Brunswick Co.: As= 2.11 +/- 0.93 ppm Lee Co.: As= 3.94 +/- 1.50 ppm Florence Co.: As= 3.20 +/- 0.85 ppm Marion Co.: As= 3.97 +/- 1.58 ppm Horry Co.: As= 3.68 +/- 1.28 ppm Richland Co.: As= 3.70 +/- 1.39 ppm Garrard Co.: As= 10.32 +/- 4.44 ppm Woodford Co.: As= 23.91 +/- 6.83 ppm Pasquotank Co.: As= 3.53 +/- 0.91 ppm Washington Co.: As= 3.20 +/- 0.43 ppm

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