PHOTO PROVIDED A woman walks with a small dog on a trail in this photo by the Susquehanna Greenway Partnership. There’s benefits to being outdoors and using mineral sunscreen.

Whether you’re kayaking down the Susquehanna River, hiking the Greenway trails or enjoying a summer swim, sun protection is essential. But did you know your choice of sunscreen doesn’t just affect your skin–it can also impact the health of the Susquehanna River itself?

Many popular sunscreens contain chemicals that pose risks not only to your body but also to the ecosystems that make this region so special. Here’s why switching to mineral-based sunscreen is a smart move for both personal health and river conservation.

Chemical sunscreens use ingredients like oxybenzone, avobenzone, and octinoxate that absorb UV rays. These compounds can seep into your skin–and into local waterways during swimming, paddling, or even showering.

Mineral sunscreens, by contrast, use zinc oxide or titanium dioxide, which sit on top of the skin and reflect UV rays. These ingredients are less likely to cause harm to aquatic life or your body.

1. Gentle on skin and kind to waterways

One of the most immediate benefits of mineral-based sunscreens is their gentleness on sensitive skin. If you’ve ever gotten sunscreen in your eyes while biking or paddling, you know how irritating some brands can be. Mineral sunscreens are non-irritating and hypoallergenic, making them ideal for outdoor adventurers with sensitive skin.

In fact, mineral sunscreens are often recommended by dermatologists for use on babies, children, and those with skin conditions like eczema, rosacea, or acne. Plus, because they don’t contain common irritants like parabens or synthetic fragrances, they’re less likely to cause breakouts or rashes during sweaty activities.

2. Immediate, reliable protection

Unlike chemical sunscreens, which require about 15-30 minutes to become effective, mineral sunscreens provide immediate protection upon application.

When you’re gearing up for a Greenway outing, you don’t always want to wait around for your sunscreen to start working. Mineral sunscreen works instantly, providing UV protection as soon as it’s applied–perfect for spontaneous dips in the river or quick trail breaks in the sun.

3. Safer ingredients: the paraben problem

Many popular sunscreen brands include preservatives like parabens, which are used to extend shelf life and prevent microbial growth. While this might sound like a good thing, research has raised concerns, linking parabens to hormone disruption and environmental contamination. These chemicals can also wash off during water activities and enter local ecosystems, where they disrupt fish and amphibian development.

Choosing paraben-free mineral sunscreens is a simple way to protect both your health and the biodiversity of the Susquehanna River basin.

4. Environmental

impact

The Susquehanna River is home to hundreds of species and feeds into the Chesapeake Bay, one of the most important estuaries in the U.S. Studies show that sunscreen chemicals, especially oxybenzone, contribute to water pollution and can harm aquatic life–even in freshwater rivers like the Susquehanna.

Mineral sunscreens labeled non-nano (meaning the particles are not small enough to be absorbed by aquatic life) and “reef-safe” are also river- and bay-safe, minimizing runoff pollution when you swim, paddle, or rinse off outdoors.

5. A little goes

a long way

One concern people often have about mineral sunscreen is the price tag–it’s true that these formulas tend to cost more than typical drugstore brands. However, you actually need less product to achieve full coverage.

Thanks to their thick, concentrated consistency, a pea-sized amount of mineral sunscreen is often enough to cover the entire face or a similarly sized area. This concentrated coverage is also perfect for on-the-go adventurers who want maximum protection with minimal bulk in their pack or dry bag.

Rather than slathering it on like lotion, the key is to dot small amounts over the area you want to protect; gently rub it in, spreading outward in small circular motions; and allow it to settle for a minute or two–it may appear white at first, but it blends as it absorbs.

It’s true that many mineral sunscreens can leave a white cast, especially on darker skin tones. However, more brands are now offering tinted mineral sunscreens that blend better with a variety of skin tones while still delivering full-spectrum protection.

6. Long-term skin

protection

Mineral sunscreen doesn’t break down in the sun as quickly as chemical alternatives. It offers consistent broad-spectrum protection against UVA and UVB rays–even during long paddles or high-sweat hikes.

Zinc oxide, in particular, is photostable, meaning it keeps working as long as it’s on your skin–ideal for full-day adventures along the Greenway.

While conventional sunscreens are widely used and effective in protecting against UV rays, mineral-based sunscreens provide a safer, more skin- and eco-friendly alternative. With concerns about parabens and chemical absorption into the bloodstream, many people are making the switch to products that prioritize health without compromising sun protection.

When shopping for sunscreen, consider looking for:

• Zinc oxide and/or titanium dioxide as active ingredients

• Paraben-free and fragrance-free formulations

• Non-nano, reef-safe or eco-certified labels

Whether you’re paddling the Susquehanna, fishing local streams, or just soaking up a summer afternoon on the water, the products you use travel with you–and sometimes, into the river.

Make the switch to mineral sunscreen and be part of keeping the Susquehanna beautiful and clean for generations to come.

The Susquehanna Greenway is a corridor of connected trails, parks, river access points, and communities, linking people to the natural and cultural treasures of the Susquehanna River. The mission of the Susquehanna Greenway Partnership is to work hand-in-hand with local, state, and national partners to complete the Susquehanna Greenway trail corridor and create resources that open the outdoors to everyone, ensuring all can experience the beauty and adventure of the Susquehanna River.