6     1503 Lower Colorado
 6     1604 Black Rock Desert-Humboldt
 6     1605 Central Lahontan
 6     1606 Central Nevada Desert Basins
 6     1710 Oregon-Washington Coastal
 6     1712 Oregon Closed Basins
 6     1801 Klamath-Northern California Coastal
 6     1802 The Sacramento River Basin
 6     1803 Tulare-Buena Vista Lakes
 6     1804 The San Joaquin River Basin
 6     1805 San Francisco Bay
 6     1806 Central California Coastal
 6     1807 Southern California Coastal
 6     1808 North Lahontan
 6     1809 Northern Mojave-Mono Lake
 6     1810 Southern Mojave-Salton Sea