According to the latest
National Assessment of Adult Literacy, State and County Estimates of Low Literacy report, 23% of Californians of 16 years and older lacked basic prose literacy skills in 2003.
And according to the 1992 National Adult Literacy Survey report's
California summary (PDF):
Twenty-four to 26 percent of the respondents in California demonstrated skills in the lowest level of prose, document, and quantitative proficiencies (Level 1). Though all adults in this level displayed limited skills, their characteristics are diverse. Many adults in this level were successful in performing simple, routine tasks involving brief and uncomplicated texts and documents . . . Others did not perform these types of tasks successfully, however, and some had such limited skills that they were unable to respond to much of the survey.
. . .
Twenty-one percent of the California respondents said they do not read any magazines in English on a regular basis . . . Seventeen percent of the adults in the state reported that they had not read any books in English in the past six months. . .