These little guys live in your well. They’re called sulfur-reducing bacteria. They don’t need oxygen to survive. They breathe using sulfur instead.
When they “breathe,” they burp. Their burp is hydrogen sulfide gas. That gas is exactly what makes rotten eggs stink. Your water is basically their bathroom.
Fun fact: This gas is also found in volcanoes. You might have a mini-volcano in your basement. Don’t worry, it’s usually harmless.
But Wait, It Gets Weirder
The smell isn’t always there. It might come and go. Why? Because the bacteria sleep. They wake up when you turn on the faucet and disturb their home.
Hot water makes the smell worse. Heat releases the gas faster. That’s why your morning shower smells like a swamp monster's bath. You’re basically steaming the gas right out of the water.
Ever notice the smell is stronger from the hot tap? You’re not imagining it. The water heater is a sulfur bacteria spa. It’s cozy and warm, perfect for their stinky parties.
