The Department of Labor's Occupation Safety and Health Administration (OSHA) on Monday offered guidance to employers on bathroom access for transgender workers.

In its 4-page Guide to Restroom Access for Transgender Workers, the agency said that transgender employees should have access to the restroom that corresponds to their gender identity.

According to one estimate, 700,000 adults in the United States identify as transgender.

“Restricting employees to using only restrooms that are not consistent with their gender identity, or segregating them from other workers by requiring them to use gender-neutral or other specific restrooms, singles those employees out and may make them fear for their physical safety,” OSHA said. “Bathroom restrictions can result in employees avoiding using restrooms entirely while at work, which can lead to potentially serious physical injury or illness.”

“Regardless of the physical layout of a worksite, all employers need to find solutions that are safe and convenient and respect transgender employees.”

(Related: Labor secretary Thomas Perez: LGBT-inclusive workplaces are more productive.)