Your tap water isn’t haunted; it’s just aerated. When water is pressurized as it travels through municipal pipes, air gets mixed in. When you open the faucet, the pressure drops, and those tiny air bubbles form a temporary white cloud.
Think of it like shaking a bottle of soda and then cracking it open—except way less sticky. The bubbles are so small they scatter light, making the water look white or milky. They’re harmless, invisible to the naked eye individually, and vanish quickly.
How to Prove It to Yourself (Fun Science!)
Grab that glass of milky tap water and set it on the counter. Watch for a minute or two. See how the cloudiness clears from the bottom up? That’s the air bubbles rising and popping at the surface. It’s a tiny, fizzy ballet happening in your kitchen.
You can even speed up the show. Gently tap the side of the glass—the bubbles will race to the top faster. It’s like your water is doing a magic trick just for you. No chemicals, no sediment, just good old-fashioned physics at play.
