In 2011, following years of outreach and training, Boston, Massachusetts, enacted regulations to improve health and safety in nail salons. These were amended in 2013 to require mechanical ventilation, including dedicated exhaust for each manicure and pedicure station. As of June 2019, 185 of 190 salons have satisfied the regulatory requirements. Regulations can help ensure that environmental health benefits are widespread and that small businesses' investment in occupational health does not result in a competitive disadvantage.