Now we’re talking. This is the big one. The one that makes you question your entire plumbing system. That sulfur, rotten egg stink is usually caused by hydrogen sulfide gas. Sounds fancy, smells like a swamp.
Where does it come from? Two places. First, it could be your water heater. If it’s old or hasn’t been used in a while, bacteria can grow inside and create that gas. Run the hot water for a bit. Still smell? Your heater might need a flush. That’s a job for a plumber, not you.
Why Does Florida's Tap Water Smell And Taste So Bad?
Second—and this is grosser—it could be from decaying organic matter in your drain. Yep, that gunk in your sink is partying and creating gas. Pour some vinegar and baking soda down the drain. It’s like a science fair volcano and a deodorizer all in one.
Is This One Dangerous?
In small amounts, hydrogen sulfide is more of a nuisance than a villain. But if the smell is very strong, or you have a well, get your water tested. High levels can be a problem. But for most city water folks, it’s just nasty, not deadly.