Ohio State University Extension Bulletin

Nonpoint Source Assessment: User's Guide to Ohio's Surface Waters

Bulletin 873-98

Appendix D: Hydrologic Group by County/Counties by Hydrologic Group

CountyHydrologic Groups
Adams46,47,48
Allen34,67,68,70
Ashland16,17,18,85,86
Ashtabula2,3,91,92,93
Athens24,26,27,28,29,30
Auglaize34,55,56,64,68,70
Belmont6,7,14,21
Brown47,48,49,53
Butler54,59,60,61,62
Carroll4,5,11,12,14
Champaign39,55,56,58
Clark39,41,42,50,56,58
Clermont49,52,53,54
Clinton42,51,52,53
Columbiana1,2,4,5,11
Coshocton13,15,17,18,19,20,21
Crawford16,34,36,80,81,84
Cuyahoga86,87,89,90
Darke56,57,59,61,63
Defiance65,71,72,73
Delaware35,36,37,38
Erie83,84,85
Fairfield22,25,38,40,41,44
Fayette41,42,43
Franklin37,38,39,40,41
Fulton72,73,75
Gallia29,30,31,32
Geauga1,88,89,90,91,92
Greene42,50,51,58
Guernsey9,14,21
Hamilton49,54,60,62
Hancock66,67,68,74,77,82
Hardin34,55,66,67,68,79
Harrison5,6,12,14
Henry71,72,73,74,75
Highland42,43,45,48,49,53
Hocking25,26,30,44
Holmes13,17,19,20
Huron81,83,84,85,86
Jackson30,31,32,33,44
Jefferson5,6
Knox16,17,18,20,22,38
Lake90,92,93
Lawrence31,32,33
Licking20,22,23,38,40
Logan34,35,39,55,58
Lorain85,86,87
Lucas74,75,76
Madison39,41,42,43,50
Mahoning1,2,3,4
Marion34,35,36,79,80
Medina10,17,19,86,87,89
Meigs26,27,28,29,30
Mercer56,63,64,69,70
Miami56,57,58
Monroe7,8,9,21
Montgomery50,56,57,58,59,60
Morgan23,24,26,27
Morrow16,18,22,36,38
Muskingum20,21,22,23,24
Noble8,9,21,24
Ottawa76,78,82
Paulding65,69,70,71
Perry22,23,24,25,26,40
Pickaway37,38,39,40,41,43,44
Pike33,43,44,45,46,48
Portage1,10,88,89,90,91
Preble59,60,61
Putnam67,68,69,70,71,73,74
Richland16,18,36,80,84,85
Ross41,42,43,44,45,48
Sandusky76,78,81,82,83
Scioto33,46,47
Seneca66,77,79,81,82,83,84
Shelby55,56,57,64,70
Stark1,10,11,13,15,88
Summit10,11,87,88,89
Trumbull1,2,3,91
Tuscarawas10,11,12,13,14,15,21
Union34,35,37,39
Van Wert64,69,70,71
Vinton30,44
Warren50,51,52,53,54,59,60
Washington8,9,24,27
Wayne10,13,17,19
Williams65,72
Wood74,75,76,77,78,82
Wyandot34,66,79,80,81
Hydrologic GroupCounty
1Columbiana, Geauga, Mahoning, Portage, Stark, Trumbull
2Ashtabula, Columbiana, Mahoning, Trumbull
3Ashtabula, Mahoning, Trumbull
4Carroll, Columbiana, Mahoning
5Carroll, Columbiana, Harrison, Jefferson
6Belmont, Harrison, Jefferson
7Belmont, Monroe
8Monroe, Noble, Washington
9Guernsey, Monroe, Noble, Washington
10Medina, Portage, Stark, Summit, Tuscarawas, Wayne
11Carroll, Columbiana, Stark, Summitt, Tuscarawas
12Carroll, Harrison, Tuscarawas
13Coshocton, Holmes, Stark, Tuscarawas, Wayne
14Belmont, Carroll, Guernsey, Harrison, Tuscarawas
15Coshocton, Holmes, Stark, Tuscarawas
16Ashland, Crawford, Knox, Morrow, Richland
17Ashland, Coshocton, Holmes, Knox, Medina, Wayne
18Ashland, Coshocton, Knox, Morrow, Richland
19Coshocton, Holmes, Medina, Wayne
20Coshocton, Holmes, Knox, Licking, Muskingum
21Belmont, Coshocton, Guernsey, Monroe, Muskingum, Noble, Tuscarawas
22Fairfield, Knox, Licking, Morrow, Muskingum, Perry
23Licking, Morgan, Muskingum, Perry
24Athens, Morgan, Muskingum, Noble, Perry, Washington
25Fairfield, Hocking, Perry
26Athens, Hocking, Meigs, Morgan, Perry
27Athens, Meigs, Morgan, Washington
28Athens, Meigs
29Athens, Gallia, Meigs
30Athens, Gallia, Hocking, Jackson, Meigs, Vinton
31Gallia, Jackson, Lawrence
32Gallia, Jackson, Lawrence
33Jackson, Lawrence, Pike, Scioto
34Allen, Auglaize, Crawford, Hardin, Logan, Marion, Union, Wyandot
35Delaware, Logan, Marion, Union
36Crawford, Delaware, Marion, Morrow, Richland
37Delaware, Franklin, Pickaway, Union
38Delaware, Fairfield, Franklin, Knox, Licking, Morrow, Pickaway
39Champaign, Clark, Franklin, Logan, Madison, Pickaway, Union
40Fairfield, Franklin, Licking, Perry, Pickaway
41Clark, Fairfield, Fayette, Franklin, Madison, Pickaway, Ross
42Clark, Clinton, Fayette, Greene, Highland, Madison, Ross
43Fayette, Highland, Madison, Pickaway, Pike, Ross
44Fairfield, Hocking, Jackson, Pickaway, Pike, Ross, Vinton
45Highland, Pike, Ross
46Adams, Pike, Scioto
47Adams, Brown, Scioto
48Adams, Brown, Highland, Pike, Ross
49Brown, Clermont, Hamilton, Highland
50Clark, Greene, Madison, Montgomery, Warren
51Clinton, Greene, Warren
52Clermont, Clinton, Warren
53Brown, Clermont, Clinton, Highland, Warren
54Butler, Clermont, Hamilton, Warren
55Auglaize, Champaign, Hardin, Logan, Shelby
56Auglaize, Champaign, Clark, Darke, Mercer, Miami, Montgomery, Shelby
57Darke, Miami, Montgomery, Shelby
58Champaign, Clark, Greene, Logan, Miami, Montgomery
59Butler, Darke, Montgomery, Preble, Warren
60Butler, Hamilton, Montgomery, Preble, Warren
61Butler, Darke, Preble
62Butler, Hamilton
63Darke, Mercer
64Auglaize, Mercer, Shelby, Van Wert
65Defiance, Paulding, Williams
66Hancock, Hardin, Seneca, Wyandot
67Allen, Hancock, Hardin, Putnam
68Allen, Auglaize, Hancock, Hardin, Putnam
69Mercer, Paulding, Putnam, Van Wert
70Allen, Auglaize, Mercer, Paulding, Putnam, Shelby, Van Wert
71Defiance, Henry, Paulding, Putnam, Van Wert
72Defiance, Fulton, Henry, Williams
73Defiance, Fulton, Henry, Putnam
74Hancock, Henry, Lucas, Putnam, Wood
75Fulton, Henry, Lucas, Wood
76Lucas, Ottawa, Sandusky, Wood
77Hancock, Seneca, Wood
78Ottawa, Sandusky, Wood
79Hardin, Marion, Seneca, Wyandot
80Crawford, Marion, Richland, Wyandot
81Crawford, Huron, Sandusky, Seneca, Wyandot
82Hancock, Ottawa, Sandusky, Seneca, Wood
83Erie, Huron, Sandusky, Seneca
84Crawford, Erie, Huron, Richland, Seneca
85Ashland, Erie, Huron, Lorain, Richland
86Ashland, Cuyahoga, Huron, Lorain, Medina
87Cuyahoga, Lorain, Medina, Summit
88Geauga, Portage, Stark, Summit
89Cuyahoga, Geauga, Medina, Portage, Summit
90Cuyahoga, Geauga, Lake, Portage
91Ashtabula, Geauga, Portage, Trumbull
92Ashtabula, Geauga, Lake
93Ashtabula, Lake

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