Study: Boiling Can Dramatically Reduce Microplastics in Water -

A new study finds that boiling water eliminates most microplastics from your water.
Scientists are starting to discover the dangers of microplastic exposure: oxidative stress, cytotoxicity, neurotoxicity, immune system disruption, and more.
Nano and microplastics can be as tiny as one-thousandth of a millimeter in diameter.

A recent study has shed light on the effectiveness of a simple yet powerful technique to reduce microplastic contamination in drinking water. The study suggests that boiling water could be a safe and straightforward method to remove up to 90% of microplastics, thereby significantly lowering the environmental exposure to these tiny plastic particles ¹.

Understanding Microplastics

Microplastics, often referred to as Nano and Microplastics (NMPs), are tiny fragments of plastic, with sizes as small as one-thousandth of a millimeter. These particles have been found in a variety of sources, including tap water, posing a growing concern about their potential health risks. While scientists are still exploring the specific health implications, there is evidence suggesting that microplastics can accumulate in the body, leading to oxidative stress, inflammation, insulin resistance, and even liver issues.

Boiling Water as a Solution

The study, published in Environmental Science & Technology Letters, found that boiling mineral-rich water for just five minutes could significantly reduce the presence of NMPs. This method involves boiling hard water, which is rich in minerals like calcium or magnesium. The boiling process creates a chalk-like residue, known as limescale or calcium carbonate (CaCO3), that can trap the plastics. After boiling, the water is allowed to cool and then filtered using a standard coffee filter or stainless steel filter to remove the trapped microplastics ¹.

The Impact of Water Hardness

The effectiveness of this method is influenced by the hardness of the water. Harder water, which contains higher levels of minerals, resulted in nearly 90% of NMPs being removed. In contrast, softer water samples with less mineral content only removed about 25% of the NMPs. This highlights the importance of water hardness in the effectiveness of boiling water as a microplastic removal technique.

Practical Steps to Reduce Microplastic Exposure

For those interested in reducing their microplastic exposure, boiling water in a glass or stainless steel pot is recommended. After boiling for approximately five minutes, the water should be allowed to cool and not stirred. This process allows the microplastics to bind to the calcium and fall to the bottom of the pot, where they can be filtered out. However, it’s important to note that boiling water alone is not a comprehensive solution to microplastic exposure. Avoiding single-use plastic packaging, not using plastic utensils and cooking products, and not using plastic containers in the dishwasher or microwave are also crucial steps in limiting microplastic exposure.

Conclusion

Boiling and filtering tap water through a simple process of boiling and then filtering with a standard coffee or stainless steel filter can dramatically reduce microplastic contamination. This method, while not a complete solution to microplastic exposure, offers a practical and accessible way to mitigate this environmental concern. By understanding the role of water hardness in the effectiveness of this technique and incorporating it into daily practices, individuals can take proactive steps towards reducing their exposure to microplastics.