Putting pennies in water is a popular DIY hack, often claimed to purify water or deter pests. However, scientific evidence supporting these claims is largely absent. While pennies can react with water, especially if they are old or contain certain metals, they don’t effectively purify it for drinking.
Unpacking the Penny and Water Myth: Does It Actually Work?
You’ve likely seen or heard about the idea of dropping pennies into water. Whether it’s to "purify" it, make it taste better, or even keep insects away, this old wives’ tale has persisted. But what’s the truth behind this quirky practice? Let’s dive into the science, or lack thereof, to understand what really happens when pennies meet water, and why you might want to reconsider this method for any practical use.
What Happens When You Put Pennies in Water?
When you place a penny in water, a few things can occur, depending on the age and composition of the penny and the water itself. Modern pennies are primarily made of zinc with a thin copper coating. Older pennies, minted before 1982, have a higher copper content.
- Oxidation and Tarnishing: Copper, being a reactive metal, can oxidize when exposed to water and air. This process, known as tarnishing, is what causes the penny to change color, often developing a greenish or dark patina.
- Leaching of Metals: In some cases, small amounts of copper or zinc can leach into the water. This is more likely to happen with older, worn pennies or if the water is acidic.
However, this leaching is not a purification process. In fact, introducing metals into your drinking water without proper filtration can be detrimental.
Does Putting Pennies in Water Purify It?
No, putting pennies in water does not purify it. The idea that pennies can kill bacteria or remove impurities is a myth. Water purification involves removing harmful microorganisms, chemicals, and sediment.
Pennies do not possess any properties that can achieve this. The slight chemical reactions that might occur do not sterilize water or make it safer to drink. Relying on pennies for water purification is ineffective and potentially risky.
Can Pennies Deter Pests or Insects?
Another common belief is that placing pennies in water can repel insects, particularly flies or mosquitoes. This is often linked to the idea that the shiny surface or the copper might deter them.
However, there is no scientific evidence to support this claim. Insects are not known to be repelled by pennies in water. This practice is likely another persistent myth with no basis in reality.
Are There Any Risks to Putting Pennies in Water?
While the immediate effect might seem harmless, there are potential risks associated with putting pennies in drinking water.
- Metal Contamination: As mentioned, small amounts of copper or zinc can leach into the water. While trace amounts of these metals are generally not harmful, excessive exposure can be. Copper toxicity can lead to gastrointestinal issues, and high zinc levels can also cause adverse health effects.
- Bacteria Growth: Stagnant water, even with a penny in it, can become a breeding ground for bacteria. The penny itself can harbor microorganisms.
What About the "Copper Water" Trend?
In recent years, there’s been a resurgence of interest in drinking water that has had copper items submerged in it, often for purported health benefits. This is sometimes referred to as "copper-infused water."
While copper is an essential trace mineral for human health, drinking water with pennies is not a safe or reliable way to increase your copper intake. Specialized copper vessels are sometimes used in traditional practices, but even these require careful consideration and are not a substitute for a balanced diet or medical advice.
Safer and More Effective Water Purification Methods
If you’re concerned about the quality of your drinking water, there are many proven and effective methods available:
- Water Filters: Pitcher filters, faucet filters, and under-sink systems can significantly reduce impurities and improve taste.
- Boiling: Boiling water for at least one minute is a reliable way to kill most harmful bacteria and viruses.
- Water Purifiers: Advanced purifiers use methods like UV light or reverse osmosis to remove a wide range of contaminants.
People Also Ask
### Does putting a penny in a glass of water make it safe to drink?
No, putting a penny in a glass of water does not make it safe to drink. This practice is a myth and does not purify water by killing bacteria or removing harmful contaminants. In fact, it could potentially introduce unwanted metals into the water.
### Why do people put pennies in water bottles?
Some people believe putting pennies in water bottles can purify the water, improve its taste, or even deter pests. These beliefs are not supported by scientific evidence and are considered folk remedies or myths.
### What happens to pennies left in water for a long time?
When pennies are left in water for a long time, they tend to tarnish and corrode. This is due to oxidation of the copper and zinc components, especially if the water is not pure or contains certain minerals. This process can also lead to a greenish residue forming.
### Can you drink water that has had a penny in it?
It is generally not recommended to drink water that has had a penny in it. While small amounts of copper and zinc might leach into the water, it’s an unreliable and potentially unsafe way to consume these minerals, and the water is not purified.
### Is copper water good for you?
While copper is an essential nutrient, drinking water with pennies is not a safe or recommended method to get your copper intake. For health benefits related to copper, it’s best to rely on a balanced diet or consult with a healthcare professional about appropriate supplements.
Conclusion: Stick to Proven Methods for Water Safety
In summary, the notion of putting pennies in water for purification or pest deterrence is a myth. The scientific reality is that pennies can corrode and leach metals, but they do not offer any genuine purification benefits. For safe and clean drinking water, always opt for established purification methods like filters or boiling.
If you’re interested in exploring other DIY hacks or learning more about water quality, consider researching home water testing kits or natural water purification techniques.