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The problem of salty tap water and how to solve it.

Last updated: 10 May 2026
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Salty tap water is another problem that homeowners and condo buyers may encounter. Due to increasingly severe drought conditions each year and high tides, tap water in Bangkok and surrounding areas may experience slow flow, weak pressure, and brackish or salty conditions at certain times. Let's look at the causes and solutions for salty tap water here.

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What causes salty tap water?

This year's salty tap water is due to very low water levels from insufficient rainfall and drought. While the Metropolitan Waterworks Authority (MWA) normally produces tap water, there are periods during high tide when seawater surges significantly, reaching the pumping stations.

This increases the likelihood of saltiness exceeding the permitted level, making the tap water unsuitable for drinking, but unaffected for other uses. The MWA strives to minimize pumping of raw water during periods of high tide.

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How should homeowners and condo buyers cope?

While a solution to salty tap water may not be achievable from the consumer's side, the best course of action is to avoid using the water altogether. Even though the salinity level may not be a major concern for most people outside of high-risk groups, it's still important to take precautions. Here are some simple ways to address this:

1. Use water filtered through a Reverse Osmosis (RO) system, a high-precision water filter that can reduce salinity.
2. Boiling tap water does not reduce salinity.
3. Reduce the amount of seasonings added, such as salt, fish sauce, soy sauce, and other condiments.
4. Avoid consuming foods high in sodium, such as snacks and potato chips.
5. If you experience itchy skin, eye irritation, or breakouts, consider switching to a different water source.

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This is a problem that homeowners and condo buyers should be aware of, as it may not be just a one-year issue. Prepare to deal with it; initially, you may need to invest in buying bottled water. While this increases your daily expenses, it's better than facing hospital bills in the future.

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Thanks to DD-Property for this helpful information.


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