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InsightHorizon Digest

What would make well water stink

Author

John Parsons

Updated on March 27, 2026

What Causes the Sulphur Smell in Well Water? The main reason for the smell is sulfur bacteria or hydrogen sulfide. Sulfur bacteria are found in environments that lack oxygen, like deep wells. You’ll also find such issues in areas having plumbing systems and organic matter.

How do I get rid of a bad smell in my well water?

  1. Aerate water and/or inject air or oxygen.
  2. Chlorinate well water to eliminate both sulfur and bacteria.
  3. Use ozone gas in a closed tank or atmospheric tank.
  4. Inject hydrogen peroxide.

How do you get rid of sulfur smell in well water?

Chlorine bleach can effectively remove medium to high levels (over 6 mg/l) of hydrogen sulfide. The chlorine in the bleach chemically reacts with (oxi- dizes) the hydrogen sulfide eliminating the “rotten egg” odor. Chlorine bleach also reacts with iron or manganese, and disinfects water supplies.

Is smelly well water safe to drink?

In most US households, though, drinking sulfur water is safe because the concentration of sulfates and hydrogen sulfide is low. With that said, sulfur in water can cause problems with your plumbing, stain your fixtures, and lead to unpleasant odors and tastes.

What does it mean when your well water smells like rotten eggs?

If your water smells like rotten eggs, that likely indicates the presence of hydrogen sulfide gas. This could be due to a problem with your water heater or naturally occurring sulfur bacteria, especially in well water. These issues can produce hydrogen sulfide, which leaves an unpleasant scent wherever it goes.

How often should you chlorinate your well?

Homeowners with private wells should have their well water tested every 3 to 5 years for some contaminants, including bacteria. If these tests turn up positive for bacteria, chlorinating the well may be a way to resolve the problem.

Can I pour bleach down my well?

Mix 2 quarts bleach in 10 gallons of water; pour into well. Connect a garden hose to a nearby faucet and wash down the inside of the well. Open each faucet and let the water run until a strong chlorine odor is detected, then turn it off and go to the next one. … Pour it into the well without pumping.

Why does my water smell like sulfur all of a sudden?

If your water smells strongly of sulfur, or rotten eggs, it is likely attributed to the presence of “sulfur bacteria” or hydrogen sulfide. … Reactions caused by the magnesium rod and aluminum in your water heater produce hydrogen sulfide gas, yielding a stronger sulfur scent when you use the hot water.

Can you filter sulfur out of water?

Small amounts of sulfur can also be removed from drinking water with a reverse osmosis filter or a granulated activated carbon filter, but neither method is very effective on its own.

Can anode rod causing rotten egg smell?

The most common cause of smelly water is anaerobic bacteria that exist in some water and react with the magnesium and aluminum sacrificial anodes that come with most water heaters to produce hydrogen sulfide gas, making the classic rotten egg odor.

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How much bleach should I put in my well?

4) Work out how much bleach will be needed: For every 50 gallons of water in the well use one quart of laundry bleach – (4 quarts in a gallon). Do not use excessive amounts of bleach – more is not more effective. 5) For best results the bleach should be combined with water before adding it to the well.

Can you put hydrogen peroxide in your well?

Hydrogen peroxide well water treatment for bacteria may not be as popular as other options for the treatment of bacteria-infested well water, but it is just as effective as, say, chlorination or shock treatment and, according to experts, is in fact safer.

Can I pour hydrogen peroxide in my well?

From time to time, it may be desirable to use hydrogen peroxide to decontaminate the entire well because some of the odor-causing bacteria also produce sulfuric acid, which will corrode the pump in the long run. Some of the iron bacteria can also produce a musty, fishy or oily smell in the water.

How do I clean my well water at home?

Fill the bucket with clear water from the well. Add about 300g of HSCH and stir until dissolved. For every cubic metre (m3) of water in the well add 10 litres (half bucket) of the chlorine solution. Double the quantity of HSCH added if the solution is to be used for cleaning well linings or aprons.

How much does it cost to disinfect a well?

To disinfect your well and eliminate the bacteria, you should chlorinate the well. You can hire a company that services wells to do the chlorinating. The cost ranges from $80 – $200.

Can you put chlorine tablets in a well?

Pool chlorine tablets can be used in wells. Ground wells require maintenance just as other household components and one of the most important tasks is disinfecting it. Disinfecting a ground well involves adding chlorine which kills bacteria and microscopic organisms living in the water.

How long does it take to get chlorine out of well water?

It can take 30 minutes to 24 hours or more to flush all of the chlorine from the well. ►Once the chlorine is gone from the well, open up each fixture one at a time until the chlorine smell is no longer present. This will purge the remaining chlorine from the water system.

How do I get the sulfur smell out of my house?

Baking soda is well known for erasing odours. And the best thing is that it’s very easy to use and efficient too. If the smell is coming from your clothes then, soak them in baking soda before washing. You can also sprinkle baking soda in all the corners of your house to get rid of the sulphur scent.

How do you remove hydrogen sulfide from well water?

Aeration. Since hydrogen sulfide occurs as a gas in water, it can be physically removed by injecting air into the water and allowing the gas to escape. Aeration units may work by cascading, bubbling, or stripping the gas from the water. Aeration may be advantageous because it does not add chemicals to the water.

How do you get the iron smell out of well water?

Solution: Use chlorine bleach, hydrogen peroxide, or ozone gas feed ahead of the iron filter with sufficient contact time by using a retention tank. After filtering with manganese dioxide iron filter, follow with an activated carbon filter.

Can you shower in water that smells like rotten eggs?

A rotten egg odor is a sign that the sulfur levels in your water may be too high. … It’s understandable if you don’t want to drink or bathe in foul-smelling water, nor should you have to. Good, clean water is free of taste or odors and doesn’t pose any risks to your health.

What causes sulfur smell in house?

The two most common sources of a rotten egg smell are a natural gas leak, and escaping sewer gas. … That’s why utility companies inject a substance called mercaptan, which emits an odor that smells like sulfur or rotten eggs. If there’s a very strong smell, you could have a substantial natural gas leak.

Should I put Clorox in my well?

Disinfecting Your Water You can disinfect your well with household chlorine bleach such as Clorox, Purex or a generic brand. The chlorine in the bleach kills bacteria. Note that it may take more than one chlorination for your well to return a satisfactory test.

Why does my well water turn brown when I add bleach?

The brown is the iron in the water that has oxidized as a result of the chlorination. Normally, the iron in water is in ion form and does not display itself until it combines with oxygen and forms common rust which turns the water reddish-brown.

How do you flush chlorine out of a well?

Use ordinary liquid laundry bleach to shock chlorinate the water system. Determine how much bleach to use, then pour the bleach down the well and circulate it through the whole water distribution system. Wait 6-12 hours for the chlorine to work, then flush the chlorinated water from your well and pipes.

How do you oxygenate well water?

Aeration can be achieved through the infusion of air into the bottom of the lake, lagoon or pond or by surface agitation from a fountain or spray-like device to allow for oxygen exchange at the surface and the release of gasses such as carbon dioxide, methane or hydrogen sulfide.

How often should I sanitize my well?

When To Disinfect Your Well You should test your water for bacteria each year, usually in the spring, or if there is any change in the taste, color, or odor of your drinking water. Other well maintenance activities can also threaten your water supply. Disinfect your well when: o The well is new.

How do you remove iron bacteria from a well?

  1. Disinfectants are the most common chemicals used to treat for iron bacteria. The most common disinfectant is household laundry bleach, which contains chlorine. …
  2. Surfactants are detergent-like chemicals, such as phosphates. …
  3. Acids can dissolve iron deposits, destroy bacteria, and loosen bacterial slime.

Can bad well water make you sick?

Health Risks Symptoms include diarrhea, vomiting, cramps, nausea, headaches, fever, fatigue, and even death sometimes. Infants, children, elderly people, and people with weakened immune systems are more likely to get sick or die from disease-causing microorganisms in drinking water.