Dan Stein of FAIR has an editorial in the Mercury News:

...The most recent effort to assess the cost of immigration in California was made by the National Academy of Sciences in 1997, which estimated that costs associated with immigration added approximately $1,300 a year to the tax liability of the typical California household. At the time these estimates were made, the state had fewer immigrants, and the economy was reaching the zenith of the high-tech boom.

Most recently, Los Angeles County, which is experiencing a full-blown health care crisis, estimated that caring for uninsured illegal aliens now costs $350 million a year. The state health budget is projected to encounter $3 billion in unreimbursed health care costs for illegal immigrants over the next five years...