Can the brain eating amoeba live in tap water. i am in california?

Report your concerns to local water supplier, as problematic issues can often be tested by water company. Might also consider contacting a local medical school about parasitic infections where you live.

Highly unlikely as tap water is treated and constantly tested for microorganisms. You definitely have a degree of health related anxiety, definitely justifiable given current conditions and might need to discuss it with your doc.