Opening your dishwasher and noticing a strong rotten egg smell can be unpleasant, especially when you expect freshly washed dishes to come out clean and fresh. Sometimes the odor is noticeable only when you open the door. Other times, it seems to spread through the kitchen or becomes stronger after the dishwasher finishes a cycle.
A dishwasher that smells like rotten eggs usually has an underlying problem that needs attention. Food particles may be trapped in the filter, dirty water might be sitting in the bottom of the appliance, or wastewater could be flowing backward from the kitchen sink. In some cases, the smell comes from sulfur compounds in the household water supply rather than the dishwasher itself.
Fortunately, many dishwasher odors can be corrected through routine cleaning and maintenance. The key is identifying exactly where the smell originates instead of simply trying to cover it with a scented cleaner.
However, a rotten egg odor can also be a warning sign of a natural gas leak, so it is important to rule out that possibility before beginning any appliance troubleshooting.
Here is how to identify the likely cause of a rotten egg smell in your dishwasher, safely clean the appliance, and prevent unpleasant odors from returning.
⚠️ First, Make Sure the Rotten Egg Smell Isn’t a Gas Leak
Before assuming your dishwasher needs cleaning, consider whether the odor might be coming from somewhere else in the kitchen.
Natural gas is normally odorless, but gas utilities add an odorant that gives it a distinctive sulfur-like or rotten egg smell. This helps people recognize potential leaks.
If the smell is strong throughout the kitchen, occurs when the dishwasher is not open, or seems to come from a gas appliance or gas piping, do not assume the dishwasher is responsible.
If you suspect a natural gas leak, leave the building immediately. Do not operate electrical switches, appliances, phones, or anything that could create a spark while inside. Once you are a safe distance away, call 911 or your gas utility’s emergency number.
Do not attempt to locate the leak yourself, and do not return until emergency personnel or the gas utility say it is safe.
According to utility safety guidance, a rotten egg odor is an important warning sign that should be taken seriously.
The cleaning and troubleshooting steps below apply only after a suspected gas leak has been ruled out and the odor has been reasonably identified as coming from the dishwasher, dishes, water, or plumbing.
🍽️ Why Does My Dishwasher Smell Like Rotten Eggs?
The most common dishwasher-related causes of rotten egg odors are trapped food residue, dirty filters, stagnant water, and drainage problems.
Dishwashers use water, detergent, and circulating spray arms to remove food from dishes. Although most of the residue washes away, some particles can become trapped in the filter, around the drain, or beneath the door.
Over time, this material can begin to decompose and develop an unpleasant sulfur-like smell.
A dishwasher’s warm, damp environment can make the odor particularly noticeable when the door is opened.
Sometimes the smell is related to standing water. If dirty wastewater remains inside the appliance or returns through an incorrectly installed drain connection, it can carry unpleasant odors into the dishwasher.
Another possibility is hydrogen sulfide in the water supply. This gas can create a rotten egg smell when certain water conditions or reactions inside a water heater are present.
Whirlpool, Bosch, and GE Appliances identify food debris, filters, drainage problems, and moisture buildup as common sources of dishwasher odors.
The first step is to determine whether the smell is coming from the dishwasher interior, the kitchen sink, or the water itself.
🧽 1. Food Particles Are Trapped in the Dishwasher Filter
A dirty filter is one of the first things to investigate when your dishwasher smells like rotten eggs.
Many modern dishwashers have a removable filter near the bottom of the tub. This filter captures food particles and helps prevent debris from circulating back onto clean dishes.
Although the filter is important for cleaning performance, it can gradually collect bits of food, grease, seeds, paper fragments, and other material.
When food residue remains trapped for an extended period, it can develop an unpleasant smell as it breaks down.
Certain foods, including eggs, dairy products, fish, and meat, may be particularly noticeable when left in a warm, damp environment.
The odor may become stronger after the dishwasher has been closed for several hours or overnight.
If you notice the smell immediately when opening the dishwasher, inspect the filter before trying other solutions.
Bosch specifically identifies trapped food particles in the filter and spray arms as common reasons dishwashers develop unpleasant odors.
Cleaning the filter is often enough to improve the smell when trapped food is responsible.
For complete maintenance instructions, see How to Clean a Dishwasher: A Complete Step-by-Step Guide.
🥚 2. Egg Residue Is Stuck to Dishes or Inside the Machine
Sometimes the smell really does come from eggs.
Cooked eggs contain sulfur-containing compounds that contribute to their familiar smell. When egg residue remains on plates, pans, utensils, or inside the dishwasher, it can create an unpleasant odor.
This is particularly noticeable when dishes containing scrambled eggs, boiled eggs, omelets, or other egg-based foods have been sitting in the machine for several days.
If the food particles are not completely removed during washing, some residue may collect in the filter or on other interior surfaces.
Egg residue can also become difficult to remove after it dries onto cookware.
The dishwasher may struggle to loosen thick or firmly attached food without a suitable wash cycle.
To help prevent this problem, scrape substantial egg residue from plates and cookware before loading.
You generally do not need to wash every dish by hand before using the dishwasher, but removing large food scraps reduces the amount of material entering the filtration system.
If dried egg is firmly attached to a pan, soaking it according to the cookware’s care instructions may help before washing.
When the smell appears after a load containing egg dishes, check both the dishes and the filter for leftover food.
💧 3. Dirty Water Is Sitting in the Bottom of the Dishwasher
Standing dirty water can produce a strong unpleasant odor, particularly when mixed with grease and food particles.
Dishwashers are designed to pump wastewater out during designated parts of the wash cycle.
However, if the filter is blocked, the drain hose is clogged, or the pump cannot move water effectively, some wastewater may remain in the tub.
As the water sits, trapped organic residue can contribute to stale, sour, or rotten odors.
You may notice that the smell becomes stronger when the dishwasher has not been used for a day or two.
It is important to recognize that a little water in the recessed filter or sump area can be normal for certain dishwasher models.
The more concerning situation is a noticeable pool of dirty water covering the bottom of the tub.
If you see standing water containing food particles or an unusual amount of residue, the appliance may not be draining properly.
Begin by cleaning the filter and inspecting the accessible drain area.
If the water continues accumulating after washing, the drain hose, pump, or plumbing connection may need further attention.
🚰 4. Dirty Sink Water Is Flowing Back Into the Dishwasher
Sometimes a dishwasher smells like rotten eggs because dirty water from the kitchen sink is flowing backward into the appliance.
Most built-in dishwashers drain into the same plumbing system used by the kitchen sink.
Depending on the installation, the dishwasher may connect to a garbage disposal or a dedicated drain fitting beneath the sink.
If the drain hose is installed incorrectly or the sink drain is partially blocked, wastewater may travel backward through the hose.
GE Appliances identifies improperly installed drain hoses as a possible cause of dirty water accumulating inside dishwashers between uses.
Many installations require a properly configured high drain loop, an approved air gap, or both, depending on the dishwasher’s instructions and local plumbing requirements.
If your dishwasher smells strongly after you use the kitchen sink or garbage disposal, this possibility deserves attention.
Check whether dirty water appears in the dishwasher after the appliance has already completed its cycle.
If the water returns several hours later, backflow may be more likely than a simple filter clog.
A qualified plumber can check whether the drain hose is routed and connected correctly.
For general household drainage guidance, see Natural Drain Cleaners: Eco-Friendly Ways to Clear Clogs.
🗑️ 5. The Garbage Disposal or Kitchen Sink Drain Smells
The dishwasher may not be the original source of the odor at all.
If your dishwasher drains through a garbage disposal, food residue inside the disposal or connected drain can produce unpleasant smells.
Grease, small food particles, and other debris may collect around the disposal and plumbing connections.
Because the dishwasher shares part of the drainage system, the smell may appear to come from the appliance even when the problem is closer to the sink.
Pay attention to when the odor occurs.
If you notice the smell while running water into the kitchen sink, using the garbage disposal, or immediately after a dishwasher drain cycle, the sink plumbing may be involved.
Check whether the sink is draining normally.
Slow drainage, gurgling sounds, or wastewater backing up into the sink suggest a plumbing problem rather than ordinary dishwasher residue.
A clogged garbage disposal or sink drain may require cleaning or professional service.
Do not pour chemical drain cleaners into the dishwasher to address a sink plumbing problem.
The correct solution depends on where the obstruction or odor is originating.
🌧️ 6. Moisture and Buildup Are Collecting Around the Door
A dishwasher’s door gasket and surrounding edges can collect moisture, grease, and small amounts of food residue.
These areas do not always receive the same direct spray pressure as the dishes inside the machine.
As a result, grime may gradually accumulate around the rubber seal, lower door lip, and narrow crevices.
Over time, this moist residue can develop musty or unpleasant odors.
Although a musty smell is not exactly the same as a sulfur-like rotten egg smell, homeowners sometimes describe strong dishwasher odors in similar ways.
Whirlpool identifies buildup around the door gasket as a common source of dishwasher smells.
Open the dishwasher and carefully inspect the rubber seal and lower inside edge of the door.
Look for greasy film, trapped food particles, or dark residue.
Use a soft cloth with warm water and a small amount of mild dish soap, if permitted by the manufacturer, to clean accessible surfaces.
Wipe away soap residue and dry the area afterward.
Avoid harsh abrasive cleaners that could damage the rubber gasket.
If the seal is cracked, deteriorating, or repeatedly collecting water, it may need closer inspection.
🦠 7. Bacteria and Organic Residue Are Creating Odors
A dishwasher contains several conditions that can contribute to unpleasant odors when food residue is allowed to accumulate.
There is moisture, warmth, and sometimes a supply of organic material from dirty dishes.
Bacteria can act on this material and produce a variety of odor-causing compounds.
Some decomposing organic matter may create sulfur-like smells, while other residue develops a sour, stale, or musty odor.
However, a rotten egg smell does not prove that hydrogen sulfide is being produced inside the dishwasher. Similar odors can have different sources, including food and plumbing.
The most effective approach is to remove the organic residue.
Cleaning the filter, accessible drain area, door gasket, and spray arms addresses the places where debris is most likely to accumulate.
A dishwasher cleaner approved by the manufacturer can then help remove remaining grease and buildup.
Using an additional fragrance or scented product without removing the source may temporarily hide the odor, but it will not correct the underlying problem.
🚿 8. Sulfur Compounds in Your Water Supply Are Causing the Smell
If your dishwasher smells like rotten eggs despite being clean, the water itself may be responsible.
Hydrogen sulfide is a gas with a distinctive rotten egg odor. It can occur naturally in groundwater or develop under certain conditions inside plumbing systems.
According to the Minnesota Department of Health, hydrogen sulfide may be produced by sulfur bacteria in wells, plumbing, water-softening systems, or water heaters.
If the water entering your dishwasher contains hydrogen sulfide, the odor may become noticeable during washing.
This possibility is particularly relevant for households that use private well water, although water-related sulfur odors can occur in other situations.
A useful clue is whether the kitchen faucet or other household faucets have a similar smell.
If the odor appears only when the dishwasher runs, the appliance and drain system may be responsible.
If several faucets also produce a rotten egg odor, the household water system deserves attention.
Before investigating the water supply, make sure a natural gas leak has been ruled out. Do not use running water as a way to test the source when a gas leak is suspected.
For an established water-odor problem, a qualified water treatment professional can help determine whether testing or treatment is needed.
🔥 9. The Water Heater Is Producing a Rotten Egg Smell
A rotten egg smell that occurs mainly when hot water is used may be related to the household water heater.
Some conventional tank water heaters contain a magnesium anode rod designed to protect the tank from corrosion.
Under certain water conditions, reactions involving sulfate compounds and the anode rod can contribute to hydrogen sulfide formation.
Sulfur bacteria inside the water heater or plumbing may also contribute.
The result can be hot water that smells like rotten eggs even though the cold water seems normal.
Because many dishwashers are connected to the household hot-water supply, this odor may become noticeable during or after a dishwashing cycle.
The Minnesota Department of Health recommends comparing odors at hot and cold faucets to help identify where hydrogen sulfide may be originating.
If only the hot water has the sulfur smell, the water heater is an important possibility.
Do not attempt to remove the water heater’s anode rod or raise the temperature excessively as a do-it-yourself odor treatment. Incorrect maintenance can damage the heater or create scalding risks.
A plumber or water treatment professional can recommend a suitable solution based on the water heater and household water conditions.
🧼 How to Clean a Dishwasher That Smells Like Rotten Eggs
If a gas leak has been ruled out and the smell is clearly associated with food residue or ordinary dishwasher buildup, a thorough cleaning is usually the best place to begin.
Rather than trying to cover the odor, focus on removing trapped debris and cleaning the areas that collect food and grease.
Always consult your dishwasher owner’s manual before removing filters, spray arms, or other components.
What You’ll Need
- Soft microfiber cloths
- Warm water
- Mild dish soap
- Soft cleaning brush or toothbrush
- Clean towel
- Flashlight
- Manufacturer-approved dishwasher cleaner
- Protective gloves if sharp debris may be present
Step-by-Step Instructions
- Empty the dishwasher. Remove all dishes, utensils, cookware, and racks necessary to reach the bottom of the appliance.
- Check for standing water. Look for an unusual pool of dirty water. If the dishwasher is not draining properly, address that problem before running another cleaning cycle.
- Locate the filter. Look near the bottom of the tub for the filter assembly. Confirm whether your model has a user-removable filter.
- Clean the filter. If permitted by the manufacturer, remove the filter and rinse it under warm running water. Gently brush away trapped food and grease using a little mild dish soap.
- Inspect the drain area. Use a flashlight to look for visible food particles or other debris around accessible drainage openings. Remove loose material carefully without reaching blindly into the pump.
- Check the spray arms. Make sure the spray arms can rotate freely. Inspect their openings for visible debris and clean them according to the owner’s manual.
- Wipe the door gasket. Use a damp microfiber cloth to clean the rubber seal, door edges, and lower door lip.
- Clean interior surfaces. Wipe away visible grease or residue from the walls and bottom of the dishwasher using a soft cloth.
- Reassemble the components. Replace the filter and any removable parts, ensuring that everything is properly secured.
- Run an approved cleaning cycle. With the dishwasher empty and able to drain normally, use a dishwasher-cleaning product and cycle recommended by the manufacturer.
- Allow the interior to dry. Once the cycle is complete and the appliance has cooled, wipe away excess moisture and ventilate the interior if the manufacturer recommends it.
- Check for remaining odors. If the rotten egg smell has disappeared, accumulated food or residue was likely contributing. If it persists, investigate the water supply and drainage system.
A complete cleaning often makes a noticeable difference when food residue is causing the smell.
For more detailed guidance on individual components, follow How to Clean a Dishwasher: A Complete Step-by-Step Guide.
🍋 Will Vinegar Remove a Rotten Egg Smell From a Dishwasher?
White vinegar is frequently recommended for dishwasher odors, but it is not the right solution for every situation.
Some dishwasher manufacturers, including Whirlpool, provide instructions for occasional vinegar-cleaning cycles on certain models.
However, repeated exposure to acidic cleaners may not be suitable for every appliance.
Vinegar may help remove certain types of residue or mineral deposits, but it cannot repair a drainage problem, unclog a pump, or correct wastewater flowing backward into the dishwasher.
If the rotten egg smell is coming from sulfur compounds in the household water supply, vinegar will not eliminate the underlying source.
And if the odor suggests a possible gas leak, cleaning should not begin until the situation has been assessed and declared safe.
For ordinary dishwasher maintenance, a cleaning product approved by the appliance manufacturer is generally the more dependable starting point.
Never mix vinegar with chlorine bleach. The combination can release dangerous chlorine gas.
Also avoid using bleach as a general dishwasher cleaner unless your manufacturer specifically permits it. Chlorine bleach can damage stainless-steel components.
For a broader explanation of cleaning-product compatibility, see Natural Cleaning Guide: Simple Ingredients, Safer Habits & Practical DIY Cleaning.
🥄 Will Baking Soda Get Rid of the Egg Smell?
Baking soda is sometimes used to absorb or reduce household odors, and certain dishwasher manufacturers describe optional baking-soda cleaning procedures.
However, it is not a universal solution for a dishwasher that smells like rotten eggs.
If the smell comes from decomposing food particles, the residue needs to be removed.
If wastewater remains in the bottom of the machine, the drainage problem must be corrected.
If the odor originates in the household hot-water system, adding baking soda to the dishwasher will not solve the water-quality issue.
Do not pour large quantities of baking soda into the appliance or mix it with other cleaning chemicals without checking the manufacturer’s instructions.
A clean filter, clear drainage path, and approved maintenance cycle are more useful than repeatedly trying different deodorizing ingredients.
🥚 Why Does My Dishwasher Smell Like Eggs After a Wash Cycle?
If the smell becomes noticeable immediately after a completed wash cycle, the appliance may be heating water that contains odor-causing compounds or disturbing residue that has accumulated inside.
Warm water can make certain odors more noticeable, especially when they are released from trapped food particles or stagnant water.
A recently washed load containing egg dishes may also leave a smell if food residue remains in the filter.
Another possibility is that the hot-water supply already contains a sulfur-like odor.
If you notice the same smell at the hot-water faucet, the water heater or plumbing system may be contributing.
Begin by examining the filter and determining whether the dishwasher drained properly.
If the appliance is clean and the water supply smells normal, the problem may involve hidden residue or drainage components.
Persistent odors after every wash may require a technician to inspect the appliance.
🚪 Why Does My Dishwasher Smell Like Rotten Eggs When I Open the Door?
A smell that is strongest when the door first opens often indicates that odor has accumulated inside the closed dishwasher.
Food particles trapped in the filter, damp residue around the gasket, or standing dirty water can all contribute.
If the dishwasher has been sitting unused for several days, the odor may become especially noticeable.
Begin by inspecting the filter and lower tub.
If the filter is coated with greasy food residue, cleaning it may resolve the smell.
If the interior is relatively clean, inspect the drain area for standing water.
It is also worth checking whether the odor seems to be coming from the dishes themselves, particularly if dirty dishes have remained inside the appliance for an extended period.
Once the source has been removed, properly ventilating the dishwasher after use may help prevent moisture-related odors from returning.
🚰 Why Does My Dishwasher Smell Like Eggs but the Sink Doesn’t?
If the kitchen sink has no noticeable odor but the dishwasher smells strongly of rotten eggs, the source may be inside the appliance.
A dirty filter, trapped food, or residue around the lower door area are particularly likely places to investigate.
However, the absence of a smell from the sink does not completely rule out a drainage problem.
Food and grease may collect in the dishwasher drain hose or connection even when the sink itself appears to drain normally.
If the smell returns quickly after cleaning, inspect whether dirty water is accumulating between wash cycles.
Also consider whether the dishwasher’s hot-water supply smells different when running.
If the odor is limited to the dishwasher despite these checks, a hidden appliance or drain-hose issue may require professional inspection.
💦 Why Does My Dishwasher Smell Like Eggs and Leave Dirty Water?
When a rotten egg odor occurs alongside substantial standing dirty water, a drainage problem becomes especially important to investigate.
A clogged filter, blocked drain pump, or restricted drain hose can prevent wastewater from leaving the appliance.
Food residue in that water may develop unpleasant odors over time.
Start by checking whether the dishwasher finished its cycle.
If it did, inspect the filter and accessible drain area according to the manual.
Avoid repeatedly running complete wash cycles if the dishwasher continues retaining dirty water.
Additional water could accumulate or potentially leak if the drainage system is severely restricted.
If cleaning the filter does not improve drainage, a technician may need to inspect the pump or drain hose.
If the water returns after using the kitchen sink, a plumber may need to check the drain connection for backflow.
🥛 Why Do My Clean Dishes Smell Like Eggs?
Sometimes the dishwasher interior smells relatively normal, but glasses, plates, or utensils have an unpleasant egg-like smell after washing.
The cause may be food residue that was not completely removed.
A dirty filter or inadequate water circulation can allow small particles to remain on dishes.
Another possibility is that the wash or rinse water itself contains odor-causing compounds.
If the smell appears on nearly every dish, check whether the dishwasher is cleaning and rinsing effectively.
Inspect the filter, spray arms, and detergent dispenser.
If only particular items smell, consider whether food residue remains on those pieces.
Dishes that smell unpleasant or have visible food residue should be washed again after the cause has been corrected.
If the odor seems related to the water supply, have that issue evaluated rather than simply running repeated wash cycles.
🌿 How to Prevent Rotten Egg Smells in the Dishwasher
Preventing dishwasher odors usually begins with keeping food residue from accumulating.
Scrape substantial food scraps from dishes before loading them, particularly when washing items containing eggs, dairy, meat, or fish.
You do not need to wash every dish completely by hand, but large pieces of food should not enter the appliance.
Clean the removable dishwasher filter according to your manufacturer’s recommended schedule.
Check the lower door edges and rubber gasket periodically for trapped food or greasy buildup.
Avoid leaving heavily soiled dishes inside a closed dishwasher for several days. If your appliance offers a rinse-only cycle, it may be useful when a full wash cannot be run immediately.
Make sure the dishwasher drains normally after each completed cycle.
If the machine has a maintenance cycle, use it at the interval recommended by the manufacturer.
A few minutes of routine maintenance can help prevent unpleasant odors from becoming a recurring problem.
For a manageable approach to other kitchen cleaning tasks, see Home Cleaning by Room: A Practical Guide for Every Space in Your Home.
⏰ How Often Should You Clean Your Dishwasher to Prevent Odors?
The ideal cleaning schedule depends on the dishwasher’s filtration system and how frequently it is used.
For many machines with removable filters, inspecting the filter approximately once a month is a practical starting point.
If you run the dishwasher daily or regularly wash heavily soiled dishes, the filter may require more frequent attention.
Some appliances have self-cleaning filtration systems with different maintenance requirements.
Whirlpool recommends routine filter maintenance and periodic dishwasher cleaning to help prevent food-related odors.
Bosch also emphasizes cleaning the filter and spray arms and performing maintenance cycles as recommended for the appliance.
Door gaskets and lower door edges should be wiped whenever visible residue accumulates.
You generally do not need to perform an elaborate deep cleaning after every wash.
The goal is to prevent food particles, grease, and stagnant water from remaining in the appliance long enough to develop unpleasant smells.
🛠️ When Should You Call an Appliance Technician or Plumber?
Most food-related dishwasher smells can be corrected with cleaning and maintenance.
However, certain symptoms suggest that professional help may be necessary.
If a strong rotten egg smell persists after a thorough cleaning, investigate the water supply and drainage system rather than repeatedly adding cleaning products.
If the dishwasher leaves substantial dirty water in the tub, makes unusual grinding noises, or repeatedly displays drainage errors, an appliance technician may need to inspect the drain pump or related components.
If the smell is associated with slow sink drainage, sewage backup, or dirty water returning to the dishwasher between cycles, a qualified plumber may be more appropriate.
If the hot-water supply has a sulfur-like odor at multiple faucets, a water heater or water treatment professional can help identify the cause.
And if a natural gas leak is suspected at any point, leave the area and contact emergency services or the gas utility from a safe location rather than scheduling ordinary appliance maintenance.
The right professional depends on whether the problem originates in the dishwasher, plumbing, water supply, or gas system.
🏡 Getting Rid of Rotten Egg Smells for Good
A dishwasher that smells like rotten eggs can be unpleasant, but the cause is often something that can be identified with a little careful troubleshooting.
Trapped food particles, dirty filters, and standing wastewater are among the most common dishwasher-related explanations.
A clogged sink drain or improperly installed drain hose may also allow unpleasant odors to enter the appliance.
In other cases, the water supply or water heater may be producing a sulfur-like smell that becomes noticeable during dishwashing.
The most important first step is safety. Because natural gas is deliberately given a rotten egg odor, never dismiss a possible gas leak as an ordinary appliance problem.
Once that possibility has been ruled out, begin with the simplest maintenance checks. Clean the filter, inspect the drain, wipe the door gasket, and run a manufacturer-approved cleaning cycle.
If the smell continues, pay attention to when it occurs and whether it also affects the kitchen sink or hot water.
Regular cleaning, proper drainage, and prompt attention to unusual odors can help keep your dishwasher functioning properly and your kitchen smelling fresh.
A clean dishwasher should make everyday kitchen cleanup easier, without leaving behind unpleasant surprises every time you open the door.
🔗 Related Articles
- How to Clean a Dishwasher: A Complete Step-by-Step Guide
- Natural Drain Cleaners: Eco-Friendly Ways to Clear Clogs
- Home Cleaning by Room: A Practical Guide for Every Space in Your Home
- Cleaning Guide: How to Keep Your Home Clean, Fresh & Manageable
- Natural Cleaning Guide: Simple Ingredients, Safer Habits & Practical DIY Cleaning
📚 Sources & Further Reading
- Whirlpool — How to Get Rid of Dishwasher Smells
- Whirlpool — Removing Odors in Your Dishwasher
- Bosch — How to Clean a Smelly Dishwasher
- Bosch — Dishwasher Troubleshooting and Maintenance
- Minnesota Department of Health — Hydrogen Sulfide and Rotten Egg Odors in Well Water
- Penn State Extension — Hydrogen Sulfide (Rotten Egg Odor) in Water Wells
- Vermont Department of Health — Hydrogen Sulfide in Drinking Water
- Pacific Gas and Electric Company — Gas Safety and What to Do If You Smell Gas
