How to Remove Bad Smell in Water Tank Permanently?

Have you ever gone to inspect your apartment’s water storage tanks and thought, “Why does my water tank smell so bad?” A bad smell in water tank is typically characterised by musty, rotten egg odour. A foul odour in overhead tank does not develop overnight; it is an amalgamation of various factors that develops over time.

Key factors that cause bad smell in water tank:

Organic waste: Leaves, twigs, and a variety of other organic materials may fall into the water tanks, especially if they are not adequately covered. Dead animals in the nearby plots may enter the groundwater and cause a bad smell. The smell gets much worse as they deteriorate and decompose.

Bacteria and microorganisms: For optimal bacterial growth, damp, dark places like a water tank are ideal. Some of them are responsible for the odour of spoiled eggs because they release hydrogen sulphide gas. The bacteria multiplies in the ground water stored in tanks which cause bad smell.

Stagnant water: When water is left standing without flowing for an extended period of time, bacteria and algae can flourish.

Rust or corrosion: Metallic pipes can react with water and produce bad rusty smell.

Contaminates water supply: Water transported from the ground/ borewell water to overhead tanks may already contain impurities which amplify bad smell when left unchecked.

Sewage water: Sewage contamination is another factor for the existence of bad smell.

To prevent these issues of foul odour in overhead tank from becoming future headaches, it is necessary to tackle them at their roots. On top of being an eyesore, it can cause major health issues like gastrointestinal infections, skin irritation, and allergies. We start to wonder about the water’s purity for important uses when it has an unpleasant odour. Therefore, having access to clean and safe water is crucial.

How to know if there is a bad smell in water tank even without the actual foul smell?

As a strong foul smell in the overhead tanks is the most obvious sign, there are many other indications to look out for:

Alteration of smell: Instead of the typical musky scent, water now has an earthy and metallic smell.
Alteration in taste: This is a big indicator of a problem, even when the smell does not show up initially. Pay attention to changes in the taste of water.
Gurgling sounds: If there is constant gurgling sound in the sink or toilets, it means that the air is trapped and is creating air bubbles in the pipes.
Visible particles: Visible sediments, cloudy water, debris inside the tank scream for immediate cleaning, otherwise bacteria may buildup and contribute to bad smell.
Reduction in the speed of water: Slow running tap water indicates slimy buildup or clogs in the pipes, which worsens the foul smell.

When should your house be tested for bad smell in water tank?

Your home should immediately be tested when you initially notice bad smell, change of taste in water and yellowing or slimy water. Ideally, water should proactively be tested every 6-12 months.

The most crucial times to test are:

After any extreme weather, such as summer or monsoon. Heatwaves and moisture cause accelerated microbial growth.

After long periods of disuse, if it has not been cleaned or used for the past few months, like if you take a long period of vacation.

If the source of water changes, it is better to immediately test your water before, as the new supply may introduce contaminants in the tank.

If you notice pest infestation in the water supply.

When the water gives obvious physical signs of discoloured water, sediment buildup and slimy interior walls to name a few.

Before bad smell water treatment for water tank, what tests can be performed?

To begin treating water, we must first check for specific criteria; the two of the essential metrics for evaluating organic contamination are:

Biological Oxygen Demand (BOD): Biological Oxygen Demand measures the amount of oxygen required by the microorganisms to break down biodegradable organic matter present in water. High levels of BOD indicate excessive organic contamination, this aids bacterial growth leading to foul odour, slime buildup and thus poor water quality in the storage tanks.

Chemical Oxygen Demand (COD): Chemical Oxygen Demand is the total amount of oxygen needed to chemically oxidize organic and inorganic pollutants in water. COD levels that are too high are usually a sign of the presence of odour-causing chemicals, industrial pollutants, and decaying organic debris, all of which discolour and impart unpleasant smells to water.

With the right combination of treatment and preventive care, it is possible to maintain clean, safe, and odor-free water for everyday use.

What are the bad smell water solutions for home?

Once you have tested the water and confirmed there is an issue, the immediate action is to find a bad smell water solution for home. The initial step is to clean it properly. The process begins by draining all the existing water so that any contaminated or stagnant water is completely removed. Next, any dirt, sludge, and debris settled at the bottom of the tank should be removed manually or with the help of a vacuum. The tank is then disinfected using chlorine or any other approved disinfectant. This step eliminates the harmful bacteria that cause the bad smell.

It is equally important to clean and flush the connected pipes, as bacteria and residues can remain in the plumbing and cause the unpleasant smell to return. Once the tank and pipes have been disinfected, the entire system should be rinsed thoroughly to remove any remaining cleaning agents and sediments. Finally, after ensuring that the water source is clean, the tank can be refilled with fresh water, restoring clean and safe water for regular use.

When should you call a professional for borewell water smell removal and bad smell water treatment in water tanks?

A professional help becomes mandatory for borewell water smell removal when:

The unbearable smell returns soon after cleaning

A persistent sewage-like smell with bacterial contamination

Brown yellow or murky water is present which often shows iron content in water

Dead animals like rodents found in the water tank

The best course of action is to hire a professional because residential or commercial overhead tanks are typically too large to clean on your own

What are the bad smell water solutions for home from Water Sparks® and how to keep the bad smell at bay?

When the bad smell keeps lingering even after the initial cleaning, it’s time to bring in the big guns: the experts. Following a thorough assessment of the profile, Water Sparks® may recommend a whole house bad smell removal treatment regimen that includes a dual activated carbon filter and an ozonator to eliminate unpleasant odours.

Dual activated carbon filter: If you live in a home that uses borewell water, you may want to consider installing a dual activated carbon filter to eliminate any lingering smells. A dual activated carbon filter is the state-of-the-art water treatment system that uses two stages of activated carbon filter to remove unpleasant smell, organic compounds and other unwanted materials from water, especially in borewell water and stored water. In this system, the water passes through two separate carbon filters, which has better contact time and is efficient in removing contaminants.

How does the dual activated carbon filter work?

First carbon filter:

The activated carbon has a highly porous surface that traps and absorbs odour causing impurities from water. The first activated carbon filter removes chlorine, organic materials, some sulphur-contaning compounds which are responsible for the “rotten-egg” smell. The first step reduces the burden on the second step as this step traps the majority of the larger pollutants.

Second carbon filter:

The second activated carbon filter provides finer filtration by removing other odour causing elements, volatile organic compounds (VOCs) and finer particles which are missed in the first step.

In addition to enhancing the water’s general flavour, this two-step procedure guarantees more thorough odour removal.

Ozonator: As a strong oxidizing agent, ozone rapidly decomposes organic pollutants including hydrogen sulphide and iron compounds, which are responsible for offensive odors and discoloration. No chemical residue is left behind when water is ozonated, and it also increases clarity and freshness.

To eliminate persistent foul stench in borewell water, an ozonator can be integrated into the treatment system. Homes experiencing rotten egg smells, metallic taste, cloudy water, often benefit from this advanced treatment method.

The best way to keep a household water tank odour-free is to clean it at least once every six months and to use a cover to keep out debris like leaves and insects. Make sure to check the water quality and conduct periodic tests to detect any buildup of bacteria. Never keep water in storage for more than necessary; refill it often.

How is Water Sparks® your best bet in the bad smell water treatment for water tank?

With a combined 25 years of expertise in the water treatment industry, the experts at Water Sparks® have a deep understanding of the geological and chemical complexities of groundwater. Professional water testing and carefully selected solutions made to order are just a few of the services we offer. We have advanced technologies for disinfecting and odour management that follows BIS water quality standards. Furthermore, we offer dependable systems that are easy to maintain.

Water Sparks® had a customer complain of bad smell, iron water and hard water, once we provided customized solutions for them and they were very happy with the final outcome. Once Water Sparks® enters the picture, you may be relaxed about the quality of the water.

FAQs –How to Remove Bad Smell in Tank Water Permanently

What causes bad smell in water tank?

A bad smell in water tank is usually caused by organic waste, bacterial growth, stagnant water, rusted pipelines, or contamination from borewell or sewage sources. In most cases, hydrogen sulphide-producing bacteria create a “rotten egg” smell when water is stored for long periods without proper cleaning or disinfection.

How can I confirm the presence of bad smell in water tank without a strong odour?

Even if the smell is not strong, you can detect issues through taste changes, cloudy water, visible sediments, slow water flow, or gurgling sounds in pipes. These signs often indicate early-stage contamination that can later develop into a severe Foul odour in overhead tank situation.

What is the best bad smell water treatment for water tank at home?

The most effective bad smell water solutions for home include thorough tank cleaning, sludge removal, chlorine disinfection, and pipe flushing. For long-term control, advanced systems like dual activated carbon filters and ozonators help eliminate bacteria and odour-causing compounds permanently.

Can borewell water smell removal be done permanently?

Yes, borewell water smell removal can be effectively controlled with proper treatment systems. Since borewell water often contains iron, sulphur, and organic impurities, solutions like oxidation, filtration, and ozonation are required. Regular testing of water parameters as per BIS guidelines ensures safe and odour-free water supply.

When should I contact professionals for bad smell in water tank treatment?

You should call experts if the smell returns after cleaning, water turns brown or yellow, sewage-like odour persists, or contamination is severe. In such cases, professionals assess the issue based on IS standards, BIS water quality guidelines, and provide customized treatment systems for permanent odour removal and safe water storage.