Boiling Removes Microplastics: How Hot Water Protects Your Health
[2025-11-30] | By Xiamen Smart Water Technology Co., Ltd. Allen Huang
Table of Contents
- What Are Microplastics?
- Why Microplastics in Tap Water Matter
- New Research: Boiling Removes Up to 80% of Microplastics
- How Boiling Water Traps Microplastics
- Hard Water vs. Soft Water: Does It Affect Removal Rates?
- Other Benefits of Boiling Water
- Does a Boiling Water Tap Help Reduce Microplastics Exposure?
- Key Parameters & Data Table
- FAQs
- Partner with China boiling water tap exper
Microplastics are tiny fragments of everyday plastics-such as polypropylene, polystyrene, and polyethylene-that have broken down into particles ranging from 0.001 mm to 5 mm. They can enter municipal water supplies through runoff, wastewater, aging pipes, and environmental pollution.
Scientists still do not fully know how microplastics affect human health. However, early studies suggest they may cause inflammation, carry chemical additives, or disrupt biological processes. Simply put: they're not something we want in our drinking water.
Recent global studies show microplastics are commonly found in household tap water, bottled water, and even groundwater. One study from China found an average concentration of 1 mg of microplastics per liter in tap water samples.
While the exact health risks are still under investigation, reducing exposure is widely recommended-especially for children, pregnant women, and people with weakened immune systems.
A research team led by Eddy Zeng at Jinan University discovered that boiling tap water for just 5 minutes can remove more than 80% of nano- and microplastic particles (NMPs).
After boiling and cooling the samples, researchers found that the concentration of microplastics dropped dramatically. Daily intake of microplastics from boiled water was 2–5 times lower than drinking water directly from the tap.
This shows boiling is one of the simplest and most effective household methods for reducing microplastic exposure.
Here's the interesting part:
- When water boils, calcium minerals naturally form tiny crystalline limescale structures.
- Microplastic particles get caught inside these structures and settle out of the water as the water cools.
In other words, boiling water "locks" the microplastics inside mineral crystals-removing them from the water you actually drink.
Yes. Removal efficiency depends on the hardness of the water:
- Hard water (high calcium) forms more crystalline structures → higher microplastic removal rate
- Soft water (low calcium) forms fewer crystals → lower removal rate, but still significant
This explains why some households see more limescale buildup-the same mechanism that helps trap microplastics.
Besides removing microplastics, boiling water also:
- Kills 99% of bacteria
- Eliminates common parasites
- Reduces certain heavy metals and volatile contaminants
- Improves taste by releasing dissolved gases
- Helps soften water for cooking and beverages
This is why many homes, offices, and commercial kitchens prefer using a Boiling Water Tap or instant hot water system for drinking and food preparation.
A Boiling Water Tap-like the under-sink instant boiling water systems manufactured by Xiamen Smart Water Technology Co., Ltd.-brings water directly to 100°C, achieving the same microplastic-reducing benefits found in the study.
Advantages include:
- Consistent, stable boiling temperature
- Faster microplastic reduction vs. stovetop boiling
- Cleaner heating chamber reduces contamination risk
- Integrated filtration options (carbon, PP, UF)
- Immediate access to 100°C water for drinking, tea, coffee, and cooking
For international brands looking for an ODM manufacturer, offering a boiling water system that reduces microplastics can be a powerful market differentiator.
| Parameter | Value / Finding | Notes |
|---|---|---|
| Average microplastics in tap water | 1 mg/L | Based on Jinan University study |
| Boiling time needed | 5 minutes | Reaches optimal removal |
| Microplastic reduction rate | > 80% | After boiling + cooling |
| Daily intake comparison | 2–5× lower when drinking boiled water | Versus unboiled tap water |
| Particle size range | 0.001–5 mm | Nano + microplastic particles |
| Removal mechanism | Crystallization of calcium forming limescale | Microplastics become trapped |
| Effect of water hardness | Higher hardness → higher removal | Soft water still effective |
| Recommended system | Boiling Water Tap / Instant Hot Water System | For continuous access to boiled water |
1. Does boiling always remove microplastics?
Yes-boiling removes more than 80% in most cases, especially in hard water regions.
2. Do Boiling Water Taps remove even more microplastics?
Boiling Water Taps maintain consistent temperatures and can pair with filtration systems, giving even better results than stovetop boiling.
3. Can boiling remove all microplastics?
Not 100%, but it significantly reduces exposure. Combining boiling with filtration gives the best results.
4. Is boiled water safe to drink daily?
Yes. It's safer than unboiled tap water because it reduces bacteria, parasites, and microplastics.
5. Why do boiling systems produce limescale?
Limescale forms from calcium crystallization-this is the same process that traps microplastics.
6. Do international brands offer microplastic-reducing boiling taps?
Many premium brands are exploring this feature. Xiamen Smart Water Technology offers ODM services to help brands integrate this functionality.
Looking to develop a premium Boiling Water Tap that helps reduce microplastics and improves drinking water safety?
Xiamen Smart Water Technology Co., Ltd. is the ODM manufacturer behind many of the world's leading under-sink boiling water system brands.
We offer:
- Complete under-sink boiling & chilled water systems
- Instant Boiling Water Taps
- Water filtration modules
- Custom R&D, design, and engineering
- Competitive factory pricing for distributors & brand owners
👉 Contact us today for ODM, distribution, or wholesale cooperation.
Let's build your next high-performance drinking water system together.