How often should you clean your water tank?


Maintaining a clean water tank is crucial for ensuring the health and safety of your household. Discovering how often you should clean your water tank can seem like a daunting task, but fear not, as we have all the information you need to know. In these informational articles about water tank cleaning in New Zealand, you will find expert advice and guidelines to help you determine the best cleaning frequency for your water tank. Say goodbye to any concerns about water quality and embrace a hygienic home environment by staying informed about water tank maintenance.

Factors to Consider

When it comes to cleaning your water tank, there are several factors you need to consider in order to determine the frequency and method of cleaning. These factors include tank size, water usage, water source, tank material, and climate. By considering these factors, you can ensure that your water tank remains clean and provides you with high-quality water.

Tank Size

The size of your water tank plays a significant role in determining how often it needs to be cleaned. Smaller tanks, typically with a capacity of up to 5,000 liters, require more frequent cleaning compared to larger tanks. This is because smaller tanks have less water volume, which means that contaminants can accumulate more quickly. On the other hand, larger tanks have a greater water capacity, allowing for the dilution of impurities, thus reducing the need for cleaning as frequently.

How often should you clean your water tank?

Water Usage

Another important factor to consider is the amount of water you use from your water tank. The frequency of cleaning will vary depending on whether your water usage is low, moderate, or high. If you have low water usage, it means that your tank takes longer to empty and refill, reducing the likelihood of contaminants building up. Alternatively, if your water usage is high, your tank will need more frequent cleaning due to the higher turnover of water and increased risk of contamination.

Water Source

The source of your water supply also determines how often you should clean your water tank. If you rely on mains water supply, the water is generally treated and filtered before it reaches your tank, reducing the need for frequent cleaning. However, if you rely on rainwater harvesting or well water, the water may contain more impurities and contaminants, requiring more regular cleaning to maintain water quality.

How often should you clean your water tank?

Tank Material

Different tank materials have varying levels of resistance to contamination and accumulation of impurities. The material of your water tank can impact how often it should be cleaned. Concrete tanks, for example, are more prone to the growth of algae and the buildup of sediments, requiring more frequent cleaning. Metal tanks, on the other hand, are less susceptible to algae growth but may require periodic maintenance due to rust or corrosion. Plastic tanks are generally easier to clean and maintain, while fiberglass tanks offer good resistance to corrosion and require less frequent cleaning.


The climate in which you live can also influence the frequency of water tank cleaning. In hot and dry climates, water tends to evaporate quickly, leaving behind concentrated impurities, making it necessary to clean your tank more often. On the other hand, in cold climates, water may freeze and cause damage to the tank, requiring periodic cleaning and maintenance. In humid climates, the high moisture levels can promote the growth of algae and mold, necessitating more frequent cleaning.

How often should you clean your water tank?

Signs That Your Tank Needs Cleaning

It’s important to be aware of the warning signs that indicate your water tank needs cleaning. By recognizing these signs, you can take prompt action to maintain the cleanliness and quality of your water supply. Some common signs that your tank needs cleaning include:

Visible Sediments

If you notice visible sediments or particles floating in your water, it is a clear indication that your tank needs cleaning. Sediments can accumulate over time and lead to contamination, affecting the quality of your water.

Unpleasant Odor

An unpleasant odor coming from your water can suggest the presence of bacteria or algae growth in your tank. This odor may be noticeable even after treating the water, indicating the need for cleaning.

Algae Growth

Algae can thrive in moist environments, such as water tanks, especially if they are exposed to sunlight. If you notice green or brownish growth on the walls or in the water, it’s a sign that your tank needs cleaning to prevent further algae buildup.

Water Discoloration

Discolored water, such as a yellow or brown tint, is a clear indication of contamination. This can occur due to the presence of rust, sediment, or other impurities, and should prompt immediate action to clean your tank.

Decreased Water Pressure

If you experience a significant decrease in water pressure, it may be a result of clogged pipes or a dirty water tank. Cleaning your tank can help restore the proper flow of water.

Benefits of Regular Cleaning

Regular cleaning of your water tank offers several benefits that contribute to the overall quality and longevity of your tank and water supply.

Improved Water Quality

Cleaning your tank ensures that your water remains clean, fresh, and free from contaminants. This is especially crucial if you use the water for drinking or cooking purposes, as it promotes good health and hygiene.

Prevention of Contamination

By regularly cleaning your water tank, you can prevent the buildup of sediments, bacteria, algae, and other impurities that can contaminate your water. Removing these contaminants lowers the risk of waterborne illnesses and ensures the safety of your water supply.

Extended Lifespan of the Tank

Regular cleaning and maintenance can help extend the lifespan of your water tank. By preventing the accumulation of corrosive substances or algae growth, you can avoid structural damage, leaks, and other issues that could shorten the lifespan of your tank.

Reduced Maintenance Costs

Routine cleaning and maintenance can help you avoid costly repairs or replacements caused by neglect or damage. By investing in regular cleaning, you can save money in the long run by preventing major issues that could require more extensive repairs.

Professional Cleaning Services

While you can perform basic cleaning of your water tank on your own, there are certain situations where hiring professional cleaning services may be necessary.

When to Hire

Consider hiring professional cleaning services if you notice excessive sediment buildup, persistent algae growth, or if your tank requires repairs or maintenance beyond your capabilities. Additionally, if you have a large tank or limited time and resources, professional cleaners can ensure a thorough and efficient cleaning process.

Process and Costs

Professional cleaning services have the expertise, equipment, and knowledge to clean your water tank effectively. They will typically drain the tank, remove any sediment or contaminants, sanitize the tank, and ensure proper refilling. The cost of professional cleaning services varies depending on factors such as tank size, location, and the extent of cleaning required. It’s best to contact local cleaning companies for quotes and to discuss specific requirements.

In conclusion, cleaning your water tank is an essential aspect of maintaining a clean and reliable water supply. By considering factors such as tank size, water usage, water source, tank material, and climate, you can determine the optimal cleaning frequency and method for your specific situation. Recognizing the signs that indicate your tank needs cleaning and understanding the benefits of regular cleaning will help ensure the longevity and quality of your water tank. Whether you choose to perform the cleaning yourself or hire professional services, regular maintenance is key to a healthy and sustainable water supply.

How often should you clean your water tank?