Why is My Tap Water Cloudy?

Cloudy tap water can be a common concern for many homeowners. Whether you live in the United States or another part of the world, it's important to understand what causes this issue and how to address it effectively.

Common Causes of Cloudy Tap Water

Cloudiness in water can be attributed to various factors, most often involving dissolved air or contaminants. Let's explore these causes in detail:

1. Dissolved Air Outgassing

When water pressure is suddenly released, dissolved air can come out of solution, causing the water to appear cloudy. This is commonly experienced after water mains repairs. If you notice that the cloudiness settles from the bottom up within a few days, it is likely due to air being flushed through the system. This is harmless and poses no health risks.

2. Contaminants

Contaminants such as iron salts, peat, or other minerals can also cause water to appear cloudy and dark. In some cases, as with the case of the writer's wife's parents in North Yorkshire, the water may appear brown and may be due to dissolved iron salts or peat. However, as long as it is drinkable, it is usually safe to use.

Aerated Water and Foam

Aerated water from the tap can sometimes be confused with cloudy water, especially if the spout is designed to inject air into the water stream. This is not a cause for concern as aerated water helps reduce splashing and can make it appear more voluminous. However, if there is no foam and the water remains cloudy, it's likely due to another cause.

Identifying and Resolving the Problem

Identifying the source of cloudy water can help you determine the best course of action:

Resolving Air Bubbles

Very tiny air bubbles are often the cause of cloudy tap water. If you notice that a glass of murky water clears from the bottom up, it is probably due to air. This is harmless and can take several days to resolve on its own. Setting a glass of water aside for about ten minutes can help you observe this phenomenon.

Resolving Sediment Contamination

If the cloudy water clears by the next morning and there is a layer of sediment at the bottom, it is likely due to sediment buildup. Installing a sediment filter can help eliminate this issue. If the water is clear in the morning and no sediment is present, it may be due to dissolved gases. In this case, installing a carbon filter can help.

Addressing Cavitation

Cavitation in plumbing systems can also cause cloudy water. This is often due to partially closed valves or leaks. Ensuring that your plumbing system is properly maintained can help prevent this issue.

Conclusion

Cloudy tap water can be caused by a variety of factors, including dissolved air, contaminants, and air bubbles. Understanding the cause can help you choose the appropriate solution, whether it involves installing filters or addressing underlying plumbing issues. If you are unsure of the cause, contact your local water company or a professional for assistance.