One PPM of chlorine is enough to kill most amoeba in about 10 mins.
If amoeba can survive in tap water where you are at, you probably shouldn't drink the water without filtering and boiling it first anyway.
Also, get some multi-chemical water test strips as well. While those don't tell the full story, they can be useful if deciding to have your water tested at a lab. (Test strips a decent enough at detecting chlorine, some metals, salts, etc. I don't know if they exist, but detection of disolved gasses, like natural gas, would be a huge plus if you live in an area that has a lot of oil drilling.)
Everyone should spend at least a few bucks to know what they will be drinking at home on a regular basis, IMHO.