- Southern Central Coast
Survey years: 1959, 1968, 1977, 1985, 1996
- Ventura County and Santa Clara River Drainage Area
Survey years: 1961, 1969, 1980, 1988, 2000
(2000 survey for Ventura County only)
- Coastal Los Angeles County
Survey years: 1955, 1960, 1973, 1982
- Orange County
Survey years: 1957, 1964, 1970, 1981, 1990
- San Diego County
Survey years: 1958, 1967, 1976, 1986, 1998
- Upper Santa Ana River Drainage Area
Survey years: 1957, 1964, 1975, 1984, 1993
- South Lahontan
Survey years: 1958, 1961, 1972, 1979, 1987
(Data updated in 1958 and 1972; 1979 survey for Owens Valley only; 1987 survey included Coachella and Palo Verde Valleys)
- Colorado Desert
Survey years: 1958, 1972, 1978, 1989, 1997
(Data updated in 1958 and 1972; 1989 and 1997 surveys for Imperial County only)
Survey nearing completion:
- Land use survey of Riverside County
Survey underway:
- Land use survey of San Bernardino County
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