BANGKOK – In a decisive move to safeguard its fragile marine ecosystems, the Department of National Parks, Wildlife and Plant Conservation has announced a stringent new regulation for visitors to Thailand’s marine national parks. Effective immediately, tourists found using sunscreens containing chemicals known to damage coral reefs could face fines of up to 100,000 baht. The policy, announced on October 16, 2025, targets substances that pose a significant threat to the long-term health of the country’s underwater habitats.

Law bans toxic sunscreen destroying corals

Director-General Atthaphol Charoenchansa detailed the scientific rationale behind the ban, identifying Oxybenzone, Octinoxate, 4-Methylbenzylidene Camphor, and Butylparaben as the primary prohibited chemicals. He explained that these compounds, common in many commercial sunscreens, cause severe harm to corals by inhibiting larval development, disrupting reproductive cycles, and accelerating the bleaching process that can ultimately lead to coral death. Park authorities are strongly advising visitors to switch to environmentally friendly alternatives that are clearly labeled as “Reef Safe” or “Reef Friendly.”

100,000 baht / 3000 USD in fines for using sunscreen in Thailand! Wear a t-shirt instead!
Do not use sunscreen with these chemicals!
The ban covers Oxybenzone, Octinoxate, 4-Methylbenzylidene Camphor and Butylparaben, which damage coral and disrupt marine ecosystems. pic.twitter.com/DHysP9P9g1

— Personal Thailand (@PersonalThai) October 20, 2025

This enforcement is a key component of Thailand’s broader strategy to balance its vital tourism industry with urgent environmental conservation needs. Officials noted that the nation’s coral ecosystems are under immense and growing pressure from a combination of chemical pollutants, coastal development, and the ongoing effects of climate change. By regulating sunscreen use, the department aims to directly reduce one source of human-caused stress on these reefs, which are indispensable for marine biodiversity and the livelihoods of local communities.

Thailand’s Maya Bay reopens on October 1st

Park authorities have confirmed that penalties will be strictly applied to ensure widespread compliance. Visitors caught using banned sunscreens may be subject to on-the-spot fines, with repeat offenders facing further legal action. To support the new rule, educational campaigns and signage at popular tourist sites like Maya Bay and Similan Islands are being enhanced to clearly inform visitors of the reef-safe requirements. Tourism operators and tour guides are also being formally advised to inform their clients of these regulations in advance of their visits. Officials express hope that by fostering environmentally responsible behavior, Thailand can preserve its iconic coral reefs for future generations while continuing to welcome tourists to its shores.

-Thailand News (TN)