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WESTCHESTER · SULFUR SMELL

Water Smells Like Rotten Eggs in Westchester

In a Westchester home on WASD water, a rotten-egg smell that appears only on the hot taps usually comes from the water heater, where the anode rod can react with the water and form hydrogen sulfide gas. If the smell is on cold taps too and your home uses a private well, the gas is likely in the groundwater. Sprinklers fed by an irrigation well can smell the same outdoors. A quick hot-and-cold check narrows it down.

A two-minute check

What you noticeLikely source
Hot taps only, strongest in the morning or after a tripWater heater and anode rod
Hot and cold, every tap, home on a wellHydrogen sulfide in the well water
Outdoors, when sprinklers runIrrigation well water
One sink or shower onlyOften the drain, not the water

The Florida Department of Health's well water fact sheet uses the same faucet logic.

Why heaters in older homes are suspects

Westchester grew mostly in the 1950s and 1960s, according to the county's history of the area, and many homes still rely on tank water heaters that are well into their service life. Tank heaters use a sacrificial anode rod, often magnesium. Under some conditions, bacteria in warm, still water react with it and produce hydrogen sulfide. WASD's chloramine residual does not prevent this inside the tank.

A licensed plumber can flush the tank or change the anode type. Check your heater's manual first, since changes can affect the warranty.

If you are on a private well

Hydrogen sulfide in a drinking well is treated with equipment chosen from the well's test: aeration, oxidizing filters or carbon, depending on the level. Iron often comes along with sulfur and changes the design. Compare approaches in aeration vs. filtration for sulfur smells, and see well water treatment in Westchester.

Sprinklers that smell

Some Westchester yards water from a shallow irrigation well. That water is untreated and can carry sulfur odor and iron. It does not affect your tap, but it can leave odors near the house and orange stains on walls and walks.

When the smell is the drain

If one sink or shower smells and the water from a glass does not, the smell is probably coming from the drain. A dry trap in a rarely used bathroom, or buildup in an older drain line, can release sewer-like odors that people mistake for the water. Run water in unused fixtures weekly and fill a glass at the tap, then step away from the sink to smell it. If the water itself is odor-free, a plumber is the right call, not a filter.

What Jorge tests

Hot and cold readings, chloramine, pH and iron, plus the heater's age and how each bathroom is used. If the heater is the cause, he will tell you and you may not need any filter. Call, text or WhatsApp (305) 793-5974.

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

Common questions

Is the smell coming from WASD's water?

If it is on hot taps only, it almost always forms in the water heater, not in the county supply.

Will a whole-home filter fix a water heater smell?

Usually not by itself, because the gas forms after the filter, inside the heater.

Why is it worse after vacation?

Water sitting in a warm tank gives the reaction time to build. Running the hot water clears it temporarily.

Can a sulfur well be treated?

Yes, with a system chosen from the well's test, often aeration or oxidation plus filtration.

Is the visit free?

Yes. The in-home test is free.

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