First up: litmus paper. This is the budget-friendly option that makes you feel like a wizard. You get a little strip of paper, dip it in your water, and watch it change color.
If it turns red, your water is acidic. If it turns blue, it’s basic. If it turns into a rainbow, you’ve probably got some radioactive runoff, so maybe stop drinking it.
Pro tip: Don’t lick the paper afterwards. I know it’s tempting, but your tongue’s pH test is not FDA-approved. It tastes like cardboard and regret.