6 15030101 Havasu-Mohave Lake
 6 15030102 Piute Wash
 6 15030104 Imperial Reservoir
 6 15030107 Lower Colorado
 6 16040203 Smoke Creek Desert
 6 16040204 Massacre Lake
 6 16050101 Lake Tahoe
 6 16050102 Truckee
 6 16050201 Upper Carson
 6 16050301 East Walker
 6 16050302 West Walker
 6 16060010 Fish Lake-Soda Spring Valleys
 6 16060015 Ivanpah-Pahrump Valleys
 6 17100309 Applegate
 6 17100311 Illinois
 6 17100312 Chetco
 6 17120007 Warner Lakes
 6 18010101 Smith
 6 18010102 Mad-Redwood
 6 18010103 Upper Eel
 6 18010104 Middle Fork Eel
 6 18010105 Lower Eel
 6 18010106 South Fork Eel
 6 18010107 Mattole
 6 18010108 Big-Navarro-Garcia
 6 18010109 Gualala-Salmon
 6 18010110 Russian
 6 18010111 Bodega Bay
 6 18010204 Lost
 6 18010205 Butte
 6 18010206 Upper Klamath
 6 18010207 Shasta
 6 18010208 Scott
 6 18010209 Lower Klamath
 6 18010210 Salmon
 6 18010211 Trinity
 6 18010212 South Fork Trinity
 6 18020001 Goose Lake
 6 18020002 Upper Pit
 6 18020003 Lower Pit
 6 18020004 McCloud
 6 18020005 Sacramento Headwaters
 6 18020101 Sacramento-Lower Cow-Lower Clear
 6 18020102 Lower Cottonwood
 6 18020103 Sacramento-Lower Thomes
 6 18020104 Sacramento-Stone Corral
 6 18020105 Lower Butte
 6 18020106 Lower Feather
 6 18020107 Lower Yuba
 6 18020108 Lower Bear
 6 18020109 Lower Sacramento
 6 18020110 Lower Cache
 6 18020111 Lower American
 6 18020112 Sacramento-Upper Clear
 6 18020113 Cottonwood Headwaters
 6 18020114 Upper Elder-Upper Thomes
 6 18020115 Upper Stony
 6 18020116 Upper Cache
 6 18020117 Upper Putah
 6 18020118 Upper Cow-Battle
 6 18020119 Mill-Big Chico
 6 18020120 Upper Butte
 6 18020121 North Fork Feather
 6 18020122 East Branch North Fork Feather
 6 18020123 Middle Fork Feather
 6 18020124 Honcut Headwaters
 6 18020125 Upper Yuba
 6 18020126 Upper Bear
 6 18020127 Upper Coon-Upper Auburn
 6 18020128 North Fork American
 6 18020129 South Fork American
 6 18030001 Upper Kern
 6 18030002 South Fork Kern
 6 18030003 Middle Kern-Upper Tehachapi-Grapevine
 6 18030004 Upper Poso
 6 18030005 Upper Deer-Upper White
 6 18030006 Upper Tule
 6 18030007 Upper Kaweah
 6 18030008 Mill
 6 18030009 Upper Dry
 6 18030010 Upper King
 6 18030011 Upper Los Gatos-Avenal
 6 18030012 Tulare-Buena Vista Lakes
 6 18040001 Middle San Joaquin-Lower Chowchilla
 6 18040002 Middle San Joaquin-Lower Merced-Lower Stanis
 6 18040003 San Joaquin Delta
 6 18040004 Lower Calaveras-Mormon Slough
 6 18040005 Lower Cosumnes-Lower Mokelumne
 6 18040006 Upper San Joaquin
 6 18040007 Upper Chowchilla-Upper Fresno
 6 18040008 Upper Merced
 6 18040009 Upper Tuolumne
 6 18040010 Upper Stanislaus
 6 18040011 Upper Calaveras
 6 18040012 Upper Mokelumne
 6 18040013 Upper Cosumnes
 6 18040014 Panoche-San Luis Reservoir
 6 18050001 Suisun Bay
 6 18050002 San Pablo Bay
 6 18050003 Coyote
 6 18050004 San Francisco Bay
 6 18050005 Tomales-Drake Bays
 6 18050006 San Francisco Coastal South
 6 18060001 San Lorenzo-Soquel
 6 18060002 Pajaro
 6 18060003 Carrizo Plain
 6 18060004 Estrella
 6 18060005 Salinas
 6 18060006 Central Coastal
 6 18060007 Cuyama
 6 18060008 Santa Maria
 6 18060009 San Antonio
 6 18060010 Santa Ynez
 6 18060011 Alisal-Elkhorn Sloughs
 6 18060012 Carmel
 6 18060013 Santa Barbara Coastal
 6 18060014 Santa Barbara Channel Islands
 6 18070101 Ventura
 6 18070102 Santa Clara
 6 18070103 Calleguas
 6 18070104 Santa Monica Bay
 6 18070105 Los Angeles
 6 18070106 San Gabriel
 6 18070107 San Pedro Channel Islands
 6 18070201 Seal Beach
 6 18070202 San Jacinto
 6 18070203 Santa Ana
 6 18070204 Newport Bay
 6 18070301 Aliso-San Onofre
 6 18070302 Santa Margarita
 6 18070303 San Luis Rey-Escondido
 6 18070304 San Diego
 6 18070305 Cottonwood-Tijuana
 6 18080001 Surprise Valley
 6 18080002 Madeline Plains
 6 18080003 Honey-Eagle Lakes
 6 18090101 Mono Lake
 6 18090102 Crowley Lake
 6 18090103 Owens Lake
 6 18090201 Eureka-Saline Valleys
 6 18090202 Upper Amargosa
 6 18090203 Death Valley-Lower Amargosa
 6 18090204 Panamint Valley
 6 18090205 Indian Wells-Searles Valleys
 6 18090206 Antelope-Fremont Valleys
 6 18090207 Coyote-Cuddeback Lakes
 6 18090208 Mojave
 6 18100100 Southern Mojave
 6 18100200 Salton Sea