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      Did you know that two ingredients found in many popular sunscreen products — oxybenzone and octinoxate — are known to harm and kill corals?

      When you apply sunscreen with these chemicals and then swim or snorkel, sunscreen washes off your body and contaminates the reef ecosystem. Sunscreen pollution is especially problematic in popular snorkeling locations, where sunscreen is washing off dozens or possibly hundreds of people each and every day.

      Download our Be Sunscreen Smart PDF

      Why oxybenzone and octinoxate are bad for reefs

      Scientific testing shows that oxybenzone and octinoxate may stunt the growth of baby corals, reports Dr. Craig Downs, executive director of the Haereticus Environmental Laboratory in Clifford, Virginia.

      Oxybenzone can also cause coral bleaching. An oxybenzone concentration of around 400 ppt over several days is enough to induce coral bleaching in warm waters. Downs’ team tested ocean water off popular beaches on Maui and detected oxybenzone contamination of up to 4,000 parts per trillion (ppt).

      Oxybenzone is toxic to seven coral species, according to Dr. Downs’ team, who tested the impact of the sunscreen chemical on corals in the lab.

      Oxybenzone may be an endocrine disruptor among marine animals such as shrimps and clams.

      Outreach

      Maui Nui Marine Resource Council reaches out to Maui County visitors and residents at events (such as the Aloha Classic and West Maui Ridge 2 Reef Rendezvous) and via social media to educate everyone about sunscreen pollution.

      Working with local snorkel cruise operators

      Many snorkel cruise companies on Maui now provide their guests with sunscreens that are free of oxybenzone and octinoxate –thanks to members of our team who worked with others in the local community to source affordable alternative products in bulk.

      Testifying for legislation to protect reefs from these chemicals

      Maui Nui Marine Resource Council has testified repeatedly in support of a proposed Maui County ban on the sale of sunscreen products containing oxybenzone and octinoxate. Read our most recent testimony here.

      Great news! Hawaiʻi legislature passes ban on sunscreens with oxybenzone and octinoxate

      In May 2018, the Hawai‘i House and Senate passed a bill that bans the sale of certain sunscreens in order to preserve marine ecosystems. Senate Bill 2571 SD2 HD2 CD1, if signed into law by Governor David Ige, “bans the sale, offer of sale, or distribution in the State of any sunscreen that contains oxybenzone or octinoxate, or both, without a prescription issued by a licensed healthcare provider to preserve marine ecosystems.” The law would go in effect beginning January 1, 2021.

      What you can do:

      Please donʻt wait for new laws. Act now to help protect our oceans by choosing your sunscreen with care. Read our blog, “10 Ways to Become More Sunscreen Smart.”

      1. Avoid sunscreens and body care products that contain oxybenzone and octinoxate. Read the labels carefully.

      2. Skip spray-on products that disperse sunscreen everywhere around you (including on sand, where it washes into the ocean).

      3. Choose zinc oxide or titanium dioxide based sunscreens. Itʻs easier than ever to find these safer sunscreen options on Maui and throughout Hawaii. If you look carefully, youʻll find these products on the shelves of most retail and grocery stores.

      Here are some natural food stores and dive shops on Maui that carry sunscreens that are free of oxybenzone and octinoxate:

      Ask for zinc oxide or titanium dioxide based sunscreens that are free of oxybenzone and octinoxate wherever you shop for body care products. Encourage stores to carry these safer alternatives.

      4. Avoid all sunscreen products made with nano particles and other possible reef-harming ingredients, including avobenzone, octocrylene and homosalate.

      5. Minimize your need for sunscreen by covering up with a hat and rash guard. Swim tights or athletic tights (like you would wear to the gym) also provide effective sun protection.

      6. Choose snorkel cruise companies that require passengers to use sunscreens that are free of oxybenzone and octinoxate.

      7. Remember that even if you are miles away from the ocean, chemicals washed off your body in your shower or bath will eventually find their way to the sea. When you’re home, do a good turn for coral reefs everywhere by avoiding all body care products with oxybenzone and octinoxate.

      Reef in Brief
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