If you could get totally, 100% pure water—the kind that has never touched a rock, a pipe, or a fish—its pH would be exactly 7.0. This is the Goldilocks number: not too acidic, not too basic (which is a fancy word for “alkaline”).
Think of lemon juice, which can have a pH around 2. That’s like a tiny, angry sour bomb in your mouth. Pure water at 7 is the opposite of that drama. It’s the water you put on your nightstand when you just want to go to sleep, not do a taste-test show.
But here’s the hilarious truth: unless you’re in a high-tech lab, you’ll never drink water that’s exactly 7. Mother Nature loves to mess with the numbers.
Why Your Tap Water Isn’t Perfect
Your tap water has a pH that usually hangs out between 6.5 and 8.5. Why? Because it’s been on a journey—through limestone, sand, and old pipes that taste like a rusty penny.
Rainwater is actually slightly acidic (around pH 5.6) because it picks up carbon dioxide from the air. It’s not harmful; it’s just doing its job. It’s like rain saying, “I’m the cleanser around here.”
Your city’s water treatment plant then adjusts the pH to make sure your pipes don’t corrode and your coffee doesn’t taste like a chemistry experiment. They’re basically the janitors of your glass.
Quick Guide to pH in Drinking Water – Tap Score
