Ten additional standards were purchased and analyzed after data analysis took place in an effort to improve annotation confidence for interesting results. We found that 9 of 10 compounds were correctly identified (amitriptyline, citalopram, diphenhydramine, triclocarban, didecyldimethylammonium, acetaminophen, benzotriazole, sertraline, and oxybenzone). Results for these compounds are reported as "confirmed", but trend analysis is based on peak area due to lack of quantitative standards run alongside the samples. The misidentified compound is not included in our results. Detailed quality control and methodological results are available in sections S.2.1, S.2.3, and S.2.4.