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KENDALL · SULFUR SMELL

Water Smells Like Rotten Eggs in Kendall

In a Kendall home on WASD water, a rotten-egg smell that shows up mostly on the hot side usually comes from the water heater, where the anode rod can react with the water and produce hydrogen sulfide. If the smell is on hot and cold, or your home or yard uses a private well, the cause is more likely sulfur in the groundwater. A quick hot-versus-cold check tells you a lot, and Jorge can test both sides free.

The 30-second check

  1. Run the cold kitchen tap for a minute and smell it.
  2. Run the hot tap and smell it.
  3. Check a tap you rarely use, like a guest bathroom.
What you noticeMost likely source
Hot only, especially after the heater sits unusedWater heater anode reaction
Hot and cold, on a private wellHydrogen sulfide in the groundwater
Only one sinkThat drain, not the water
Pool-like rather than eggyChloramine or chlorine from WASD

The water heater cause, common on Kendall city water

Most tank water heaters contain a sacrificial anode rod that protects the tank from corrosion. Under some conditions, bacteria in the warm tank interact with the anode and produce hydrogen sulfide. Homes that sit empty for weeks, like seasonal residents, notice it most. A plumber or the heater's manufacturer can advise on flushing the tank or changing the anode type. A whole-home filter on the incoming line is not the fix for a heater problem, and Jorge will tell you so.

The well cause: sulfur in Kendall groundwater

Private wells draw from the Biscayne Aquifer without the treatment WASD applies. Some wells carry hydrogen sulfide, which smells on every tap. The fix depends on how strong it is and what else is in the water, particularly iron. Common approaches include aeration or oxidizing filtration, chosen after a test. Read aeration vs. filtration for sulfur smells and well water treatment in Kendall.

Do not confuse it with chloramine

WASD disinfects Kendall's water with chloramine and periodically switches to free chlorine during maintenance, which can make the smell stronger for a couple of weeks. That is a pool-like or bleach smell, not rotten eggs. If chlorine-type odor is the problem, see the Kendall chloramine filter page.

Get it identified

Jorge checks hot and cold, asks about your heater and whether you have a well, and tests for the culprits. Then he tells you whether you need a plumber, a well treatment system or nothing at all. Call, text or WhatsApp (305) 793-5974.

Updated 2026-10-17 · Living Waters · Jorge Canela, Water Quality Specialist

Common questions

Why does only my hot water smell like eggs?

That pattern usually points to the water heater, where the anode rod can react and produce hydrogen sulfide. A plumber or the heater manufacturer can advise on flushing or changing the anode.

Is WASD water causing the rotten-egg smell?

Treated WASD water is disinfected with chloramine, which smells more like a pool. A rotten-egg smell usually starts in the water heater or in a private well.

How is sulfur removed from Kendall well water?

Options include aeration and oxidizing filtration. The right one depends on the sulfide level and other factors like iron, so it is chosen after a test.

Can a whole-home filter fix a smelly water heater?

No. The smell is created inside the heater after the water has passed through any filter on the main line.

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