You might never noticed it before. Now it’s like your sink is showing off.
Cold weather is a big culprit. Cold water holds more dissolved air than warm water.
Also, if your city had a water main break or did some repairs? That stirs up trapped air. Your glass is just the aftermath of a plumbing burp.
A Quick Aside About Your Home’s Pipes
Sometimes your own house is the culprit. Did you just install a new water heater? Or mess with the main shut-off valve?
Why My Tap Water Is Cloudy | Gas Furnace
That can push extra air into the lines. It’s like shaking up a bottle you just opened.
Let the system run for a few minutes. The bubbles will get bored and leave.