Popular Science tells the story of proposed legislation which would provide that (quoted from the bill)
No person shall use or apply sunscreen, sunblock, or cosmetic containing any oxybenzone while on a beach or in the ocean.
The article seems to imply a broader ban, saying
[...] Hawaii's ban, if successful, would be unusual for its scale—it would be state wide, across all of the islands, affecting even those who may never set foot in the ocean.
The bill, it says, is motivated by studies indicating that oxybenzone (also known as benzophenone-3), can harm coral.
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Sunscreen: Coral Reef Killer?
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Severe Bleaching Hits the Great Barrier Reef for Second Year in a Row
Rising Global Temperatures and El Niño are Contributing to Coral Reef Loss
Great Barrier Reef Experiencing Worst Bleaching on Record
(Score: 2) by VLM on Monday May 01 2017, @12:12PM
Looks like WRT health of the user and things nearby, sunscreen is analogous to filtered cigarettes.