New Mexico
35
05
3505
CENTRAL VALLEY
NM
06
3506
CENTRAL HIGHLANDS
Idaho
16
01
1601
PANHANDLE
ID
02
1602
NORTH CENTRAL PRAIRIES
04
1604
CENTRAL MOUNTAINS
1605
SOUTHWESTERN VALLEYS
07
1607
CENTRAL PLAINS
1606
SOUTHWESTERN HIGHLANDS
10
1610
EASTERN HIGHLANDS
08
1608
NORTHEASTERN VALLEYS
Washington
53
5301
WEST OLYMPIC COAST
WA
5304
E OLYMPIC CASCADE FOOTHILLS
5302
NE OLYMPIC SAN JUAN
03
5303
PUGET SOUND LOWLANDS
5306
EAST SLOPE CASCADES
5305
CASCADE MOUNTAINS WEST
5308
CENTRAL BASIN
5307
OKANOGAN BIG BEND
09
5309
NORTHEASTERN
5310
PALOUSE BLUE MOUNTAINS
Arizona
0401
NORTHWEST
AZ
0402
NORTHEAST
0405
SOUTHWEST
0403
NORTH CENTRAL
0406
SOUTH CENTRAL
0404
EAST CENTRAL
0407
SOUTHEAST
Alabama
0101
NORTHERN VALLEY
AL
0103
UPPER PLAINS
0102
APPALACHIAN MOUNTAIN
0104
EASTERN VALLEY
0105
PIEDMONT PLATEAU
0106
PRAIRIE
0107
COASTAL PLAIN
0108
GULF
Arkansas
0501
AR
0502
0503
0504
WEST CENTRAL
0505
CENTRAL
0506
0508
0509
0507
Delaware
1002
SOUTHERN
DE
1001
NORTHERN
Florida
12
1201
FL
1202
NORTH
1203
Georgia
13
1308
GA
1307
1309
1304
1305
1306
1301
1302
1204
1205
EVERGLADES
1206
LOWER EAST COAST
1207
KEYS
Illinois
17
1701
IL
1702
1704
1705
EAST
1706
WEST SOUTHWEST
1707
EAST SOUTHEAST
1709
1708
Indiana
18
1801
IN
1802
1803
1804
1805
1806
1807
1808
1809
Iowa
19
1902
IA
1903
1904
1905
1906
1907
1908
1909
Kansas
20
2001
KS
2003
2004
2005
2006
2007
2008
2009
Maryland
24
2408
ALLEGHENY PLATEAU
MD
2407
2406
NORTHERN CENTRAL
2405
NORTHEASTERN SHORE
2404
UPPER SOUTHERN
2402
CENTRAL EASTERN SHORE
2401
SOUTHEASTERN SHORE
Virginia
51
5101
TIDEWATER
VA
5104
5105
CENTRAL MOUNTAIN
5102
EASTERN PIEDMONT
5103
WESTERN PIEDMONT
5106
SOUTHWESTERN MOUNTAIN
Kentucky
21
2101
WESTERN
KY
2102
2103
BLUE GRASS
2104
EASTERN
Louisiana
22
2201
LA
2202
2203
2205
2206
2207
2209
Michigan
26
2601
WEST UPPER
MI
2602
EAST UPPER
2603
2604
NORTHEAST LOWER
2605
WEST CENTRAL LOWER
2606
CENTRAL LOWER
2607
EAST CENTRAL LOWER
2608
SOUTHWEST LOWER
2609
SOUTH CENTRAL LOWER
2610
SOUTHEAST LOWER
Minnesota
27
2701
MN
2702
2703
2705
2706
2707
2708
2709
Mississippi
28
2801
UPPER DELTA
MS
2802
2803
2804
LOWER DELTA
2805
2806
2807
2808
2809
2810
COASTAL
Missouri
29
2901
NORTHWEST PRAIRIE
MO
2904
WEST OZARKS
2905
EAST OZARKS
2906
BOOTHEEL
Montana
30
3001
MT
3003
3006
3004
3002
SOUTHWESTERN
3005
3007
SOUTHEASTERN
North Dakota
38
3801
ND
3802
3804
3805
3806
3808
3809
Nebraska
31
3101
NE
3102
3103
3107
3105
3106
3108
3109
Oklahoma
40
4001
OK
4002
1603
NORTH CENTRAL CANYONS
1609
UPPER SNAKE RIVER PLAINS
1303
1703
WEST
1901
2002
2403
LOWER SOUTHERN
2204
2208
2704
2902
NORTHEAST PRAIRIE
3807
Pennsylvania
42
4210
NORTHWEST PLATEAU
PA
Massachusettes
25
2502
MA
Connecticut
0903
CT
2903
WEST CENTRAL PLAINS
South Carolina
45
4506
SC
4003
4004
4005
4006
4007
4008
4009
North Carolina
37
3701
SOUTHERN MOUNTAINS
NC
3702
NORTHERN MOUNTAINS
3705
SOUTHERN PIEDMONT
3704
CENTRAL PIEDMONT
3703
NORTHERN PIEDMONT
3708
NORTHERN COASTAL PLAIN
3707
CENTRAL COASTAL PLAIN
3706
SOUTHERN COASTAL PLAIN
4505
4501
MOUNTAIN
4502
4503
4504
4206
UPPER SUSQUEHANNA
4201
POCONO MOUNTAINS
4207
4205
MIDDLE SUSQUEHANNA
4209
SOUTHWEST PLATEAU
4208
SOUTH CENTRAL MOUNTAINS
4204
LOWER SUSQUEHANNA
4203
SOUTHEASTERN PIEDMONT
4202
EAST CENTRAL MOUNTAINS
Ohio
39
3901
OH
3902
3907
NORTHEAST HILLS
3910
3909
3908
3904
3905
3906
3903
Wisconsin
55
5501
WI
5502
5503
5504
5505
5506
5507
5508
5509
Tennessee
47
4704
TN
4703
MIDDLE
4702
CUMBERLAND PLATEAU
4701
Texas
48
4801
HIGH PLAINS
TX
4802
LOW ROLLING PLAINS
4803
4804
EAST TEXAS
4805
TRANS PECOS
4806
EDWARDS PLATEAU
4807
4809
4808
UPPER COAST
4810
LOWER VALLEY
South Dakota
46
4601
SD
4602
4603
4604
BLACK HILLS
4606
4607
4609
4608
4605
Maine
23
2301
ME
2302
SOUTHERN INTERIOR
2303
New Hampshire
33
3301
NH
3302
Vermont
50
5002
VT
5001
5003
2501
3803
4507
2503
0901
0902
Rhode Island
44
4401
ALL
RI
New York
36
3608
ST. LAWRENCE VALLEY
NY
3609
GREAT LAKES
3603
NORTHERN PLATEAU
3607
CHAMPLAIN VALLEY
3605
HUDSON VALLEY
3606
MOHAWK VALLEY
3601
WESTERN PLATEAU
3602
EASTERN PLATEAU
3604
New Jersey
34
3401
NJ
3402
3403
3610
CENTRAL LAKES
West Virginia
54
5401
NORTHWESTERN
WV
5403
5402
5404
5405
5406
Colorado
0804
PLATTE DRAINAGE BASIN
CO
0802
COLORADO DRAINAGE BASIN
0805
RIO GRANDE DRAINAGE BASIN
0801
ARKANSAS DRAINAGE BASIN
0803
KANSAS DRAINAGE BASIN
California
0607
SOUTHEAST DESERT BASIN
CA
0603
NORTHEAST INTER. BASINS
0602
SACRAMENTO DRNG.
0605
SAN JOAQUIN DRNG.
0601
NORTH COAST DRAINAGE
0604
CENTRAL COAST DRNG.
0606
SOUTH COAST DRNG.
Nevada
32
3203
NV
3202
3201
3204
EXTREME SOUTHERN
Wyoming
56
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
49
4901
UT
4903
4905
4906
UINTA BASIN
4907
4904
4902
DIXIE
Oregon
41
4109
OR
4107
4105
HIGH PLATEAU
4103
4104
NORTHERN CASCADES
4106
4108
4101
COASTAL AREA
4102
WILLAMETTE VALLEY
3503
NORTHEASTERN PLAINS
3507
SOUTHEASTERN PLAINS
3501
NORTHWESTERN PLATEAU
3502
3508
SOUTHERN DESERT
3504
SOUTHWESTERN MOUNTAINS