Maybe you’re a data nerd, or maybe you’re just really suspicious of your local tap water. For the ultimate accuracy, you can send a sample to a lab. Some local county health departments or water treatment companies will do this for free or a small fee.
You just collect a small sample in a sterile bottle, mail it off, and wait for a detailed report. This test will even tell you exactly which minerals (like calcium and magnesium) are crashing your party. It’s the most reliable, but it’s also the most effort—like going to the doctor instead of WebMD.
