Sunscreen is our trusted shield against harmful ultraviolet rays. But did you know that some sunscreens can actually harm aquatic ecosystems, especially lakes and other bodies of water with slow water turnover?
What exactly is harmful?
The main culprit lies in the chemical filters found in many sunscreens. The most common offenders include oxybenzone, octinoxate, avobenzone, and nanoparticles of zinc oxide or titanium dioxide, which:
- Disrupt the natural water balance in lakes.
- Accumulate in aquatic life.
- Diminish water clarity.
What can you do?
Given how popular lakes are for recreation, especially in the heat, it’s essential to strike a balance between protecting your skin and preserving the environment.
- Opt for mineral sunscreens: Look for sunscreens with zinc oxide and titanium dioxide. These mineral filters form a physical barrier on your skin that reflects UV rays and are much safer for aquatic ecosystems. Unlike chemical filters, they don’t dissolve in water and are less likely to be absorbed by organisms. Just make sure they are “non-nano,” as nanoparticles can potentially enter cells.
- Protect your skin with clothing: This is one of the best ways to guard against the sun without relying on chemicals. Wear long-sleeved clothing, wide-brimmed hats, and sunglasses, particularly during peak sun hours (10:00 AM to 4:00 PM). There are also special swimwear and shirts designed with UV protection in mind.
- Avoid the sun’s peak hours: Plan your water activities for the morning or evening when the sun’s intensity is lower and less harmful.
- Wash off sunscreen before swimming: If you do use chemical sunscreens, make sure to wash them off with soap and water before entering the lake. This helps reduce the amount of chemicals entering the water.
- Spread the word: Share the importance of using eco-friendly sunscreens with friends and family to encourage better habits for the environment.
In conclusion, reducing the use of chemical sunscreens and switching to more environmentally friendly alternatives is a crucial step in preserving our lakes' purity and protecting the health of their ecosystems.
Earlier, we discussed the start of the summer swimming season at Lake of Youth and the diverse wildlife that inhabits this beautiful body of water.