Look, unless you’re raising koi fish or brewing kombucha, the chlorine in tap water is harmless. It’s literally there to keep you from getting sick. But if you want it gone for taste or plant sanity, 24 hours at room temperature in an open container is your golden rule. Boil it if you’re in a hurry.
Most of us overthink this. I once watched a YouTube video titled “Chlorine Evaporation Science,” and the guy just left a glass on his counter and timed it with a stopwatch. He looked so bored. But that’s the truth: chlorine evaporates faster than your enthusiasm for a Monday morning. So fill that pitcher, go pet your dog, and stop stressing.
Your water will be ready before you realize you forgot to water the plants again. And if not? Well, that’s what coffee filters are for.
