1
91
New Mexico
35
05
29
2905
5
3505
CENTRAL VALLEY
NM
0
2
92
06
2906
6
3506
CENTRAL HIGHLANDS
3
93
Idaho
16
01
10
1001
1601
PANHANDLE
ID
4
94
02
1002
1602
NORTH CENTRAL PRAIRIES
96
04
1004
1604
CENTRAL MOUNTAINS
97
1005
1605
7
SOUTHWESTERN VALLEYS
98
07
1007
1607
8
CENTRAL PLAINS
99
1006
1606
9
SOUTHWESTERN HIGHLANDS
101
1010
1610
11
EASTERN HIGHLANDS
102
08
1008
1608
12
NORTHEASTERN VALLEYS
103
Washington
53
45
4501
5301
13
WEST OLYMPIC COAST
WA
104
4504
5304
14
E OLYMPIC CASCADE FOOTHILLS
105
4502
5302
15
NE OLYMPIC SAN JUAN
106
03
4503
5303
PUGET SOUND LOWLANDS
107
4506
5306
17
EAST SLOPE CASCADES
108
4505
5305
18
CASCADE MOUNTAINS WEST
109
4508
5308
19
CENTRAL BASIN
78
172
Indiana
09
1209
1809
82
SOUTHEAST
IN
110
4507
5307
20
OKANOGAN BIG BEND
111
4509
5309
21
NORTHEASTERN
112
4510
5310
22
PALOUSE BLUE MOUNTAINS
113
Arizona
201
0401
23
NORTHWEST
AZ
114
202
0402
24
NORTHEAST
115
205
0405
25
SOUTHWEST
116
203
0403
26
NORTH CENTRAL
117
206
0406
27
SOUTH CENTRAL
118
204
0404
28
EAST CENTRAL
119
207
0407
120
Alabama
0101
30
NORTHERN VALLEY
AL
121
0103
31
UPPER PLAINS
122
0102
32
APPALACHIAN MOUNTAIN
123
0104
33
EASTERN VALLEY
124
0105
34
PIEDMONT PLATEAU
125
0106
PRAIRIE
126
0107
36
COASTAL PLAIN
127
0108
37
GULF
128
Arkansas
301
0501
38
AR
129
302
0502
39
130
303
0503
40
131
304
0504
41
WEST CENTRAL
132
305
0505
42
CENTRAL
133
306
0506
43
134
308
0508
44
135
309
0509
136
307
0507
46
137
Delaware
702
47
SOUTHERN
DE
138
701
48
NORTHERN
139
Florida
801
1201
49
FL
140
802
1202
50
NORTH
141
803
1203
51
142
Georgia
908
1308
52
GA
143
907
1307
144
909
1309
54
145
904
1304
55
146
905
1305
56
147
906
1306
57
148
901
1301
58
149
902
1302
59
151
804
1204
61
152
805
1205
62
EVERGLADES
60
153
806
1206
63
LOWER EAST COAST
154
807
1207
64
KEYS
155
Illinois
1101
1701
65
IL
156
1102
1702
66
158
1104
1704
68
159
1105
1705
69
EAST
160
1106
1706
70
WEST SOUTHWEST
67
161
1107
1707
71
EAST SOUTHEAST
162
1109
1709
72
163
1108
1708
73
164
1801
74
165
1802
75
166
1803
76
167
1804
77
168
1805
169
1806
79
170
1807
80
171
1208
1808
81
174
Iowa
1902
84
IA
175
1303
1903
85
176
1904
86
177
1905
87
83
178
1906
88
179
1907
89
180
1908
90
181
1909
182
Kansas
1401
2001
KS
184
1403
2003
185
1404
2004
95
186
1405
2005
187
1406
2006
188
1407
2007
189
1408
2008
190
1409
2009
100
191
Maryland
2408
ALLEGHENY PLATEAU
MD
192
2407
193
2406
NORTHERN CENTRAL
194
2405
NORTHEASTERN SHORE
195
2404
UPPER SOUTHERN
197
2402
CENTRAL EASTERN SHORE
198
2401
SOUTHEASTERN SHORE
199
Virginia
4401
5101
TIDEWATER
VA
200
4404
5104
4405
5105
CENTRAL MOUNTAIN
4402
5102
EASTERN PIEDMONT
4403
5103
WESTERN PIEDMONT
4406
5106
SOUTHWESTERN MOUNTAIN
Kentucky
1501
2101
WESTERN
KY
1502
2102
1503
2103
BLUE GRASS
208
1504
2104
EASTERN
209
Louisiana
2201
LA
210
2202
211
1603
2203
213
2205
214
2206
215
2207
217
1609
2209
218
Michigan
2601
WEST UPPER
MI
219
2002
2602
EAST UPPER
220
2603
221
2604
NORTHEAST LOWER
222
2605
WEST CENTRAL LOWER
223
2606
CENTRAL LOWER
224
2607
EAST CENTRAL LOWER
225
2608
SOUTHWEST LOWER
226
2609
SOUTH CENTRAL LOWER
227
2010
2610
SOUTHEAST LOWER
228
Minnesota
2701
MN
229
2702
230
2703
232
2105
2705
233
2106
2706
234
2107
2707
235
2108
2708
236
2109
2709
237
Mississippi
2801
UPPER DELTA
MS
238
2802
239
2803
240
2204
2804
150
LOWER DELTA
241
2805
242
2806
243
2807
244
2208
2808
245
2809
246
2210
2810
COASTAL
247
Missouri
2301
2901
157
NORTHWEST PRAIRIE
MO
250
2304
2904
WEST OZARKS
251
2305
EAST OZARKS
252
2306
BOOTHEEL
253
Montana
3001
MT
254
2403
3003
255
3006
256
3004
257
3002
SOUTHWESTERN
258
3005
259
3007
SOUTHEASTERN
260
North Dakota
3201
3801
ND
261
3202
3802
263
3204
3804
173
264
3205
3805
265
3206
3806
267
3208
3808
268
3209
3809
269
Nebraska
2501
3101
NE
270
2502
3102
271
2503
3103
272
2507
3107
273
2505
3105
183
274
2506
3106
275
2508
3108
276
2509
3109
277
Oklahoma
3401
4001
OK
278
3402
4002
1003
NORTH CENTRAL CANYONS
1009
UPPER SNAKE RIVER PLAINS
903
1103
1703
WEST
1901
1402
196
LOWER SOUTHERN
212
216
231
2704
248
2302
2902
NORTHEAST PRAIRIE
266
3207
3807
Pennsylvania
3610
4210
NORTHWEST PLATEAU
PA
Massachusettes
MA
Connecticut
603
0903
CT
249
2303
2903
WEST CENTRAL PLAINS
299
South Carolina
SC
279
3403
4003
280
3404
4004
281
3405
4005
282
3406
4006
283
3407
4007
284
3408
4008
285
3409
4009
286
North Carolina
3701
SOUTHERN MOUNTAINS
NC
287
3702
NORTHERN MOUNTAINS
288
3705
SOUTHERN PIEDMONT
289
3104
3704
CENTRAL PIEDMONT
290
3703
NORTHERN PIEDMONT
291
3708
NORTHERN COASTAL PLAIN
292
3707
CENTRAL COASTAL PLAIN
293
3706
SOUTHERN COASTAL PLAIN
295
296
MOUNTAIN
297
298
3803
300
3606
4206
UPPER SUSQUEHANNA
3601
4201
POCONO MOUNTAINS
3607
4207
3605
4205
MIDDLE SUSQUEHANNA
3609
4209
SOUTHWEST PLATEAU
3608
4208
SOUTH CENTRAL MOUNTAINS
3604
4204
LOWER SUSQUEHANNA
3603
4203
SOUTHEASTERN PIEDMONT
310
3602
4202
EAST CENTRAL MOUNTAINS
311
Ohio
3301
3901
OH
312
3302
3902
313
3307
3907
NORTHEAST HILLS
314
3310
3910
315
3309
3909
316
3308
3908
317
3304
3904
318
3305
3905
319
3306
3906
320
3303
3903
321
Wisconsin
4701
5501
WI
322
4702
5502
323
4703
5503
324
4704
5504
325
4705
5505
326
4706
5506
327
4707
5507
328
4708
5508
329
4709
5509
330
Tennessee
TN
331
MIDDLE
332
CUMBERLAND PLATEAU
333
334
Texas
4101
4801
HIGH PLAINS
TX
335
4102
4802
LOW ROLLING PLAINS
336
4103
4803
337
4104
4804
EAST TEXAS
338
4105
4805
TRANS PECOS
339
4106
4806
EDWARDS PLATEAU
340
4107
4807
341
4109
4809
342
4108
4808
UPPER COAST
343
4110
4810
LOWER VALLEY
Wyoming
5601
YELLOWSTONE DRAINAGE
WY
5602
SNAKE DRAINAGE
5604
BIG HORN
5605
POWDER, LITTLE MISSOURI, TONGU
5606
BELLE FOURCHE DRAINAGE
5607
CHEYENNE & NIOBRARA DRAINAGE
5603
GREEN AND BEAR DRAINAGE
5610
UPPER PLATTE
5608
LOWER PLATTE
5609
WIND RIVER
Utah
4901
UT
344
South Dakota
4601
SD
4602
4603
4604
BLACK HILLS
4606
4607
4609
4608
262
4605
Maine
ME
SOUTHERN INTERIOR
New Hampshire
NH
Vermont
4302
5002
VT
4301
5001
4303
5003
3203
294
601
0901
602
0902
Rhode Island
ALL
RI
New York
3008
ST. LAWRENCE VALLEY
NY
3009
GREAT LAKES
NORTHERN PLATEAU
CHAMPLAIN VALLEY
HUDSON VALLEY
MOHAWK VALLEY
WESTERN PLATEAU
EASTERN PLATEAU
New Jersey
NJ
3010
CENTRAL LAKES
West Virginia
5401
NORTHWESTERN
WV
5403
5402
5404
5405
5406
Colorado
504
0804
PLATTE DRAINAGE BASIN
CO
502
0802
COLORADO DRAINAGE BASIN
505
0805
RIO GRANDE DRAINAGE BASIN
501
0801
ARKANSAS DRAINAGE BASIN
503
0803
KANSAS DRAINAGE BASIN
California
407
0607
SOUTHEAST DESERT BASIN
CA
403
0603
NORTHEAST INTER. BASINS
402
0602
SACRAMENTO DRNG.
405
0605
SAN JOAQUIN DRNG.
401
0601
NORTH COAST DRAINAGE
404
0604
CENTRAL COAST DRNG.
406
0606
SOUTH COAST DRNG.
Nevada
NV
EXTREME SOUTHERN
4903
4905
4906
UINTA BASIN
4907
4904
4902
DIXIE
Oregon
3509
OR
3507
HIGH PLATEAU
3503
3504
NORTHERN CASCADES
3508
3501
COASTAL AREA
3502
WILLAMETTE VALLEY
NORTHEASTERN PLAINS
2907
SOUTHEASTERN PLAINS
NORTHWESTERN PLATEAU
2908
SOUTHERN DESERT
SOUTHWESTERN MOUNTAINS