Creates a radon task force to conduct a comprehensive study on preventing radon exposure, including an examination of the need for interagency coordination of public education and prevention programs and the need for training, education and possible licensing of radon services providers. Directs the task force to submit its recommendations and any proposed legislation necessary to implement its findings to the governor and the legislature. Subsequent legislation extended the deadline for submitting the report to November 1, 2022.

Prohibits, beginning in 2021, the installation of a mercury-containing floor in public and nonpublic elementary and secondary schools. Also prohibits schools from installing a floor over a mercury-containing floor prior to removal of the mercury-containing floor. Provides that the time-weighted average mercury vapor exposure for an employee or student of a public or nonpublic elementary or secondary school shall not exceed 750 ng/m3.

Requires private sector employers to establish an "airborne infectious disease exposure prevention plan" to be implemented for airborne infectious diseases that are "designated by the commissioner of health as a highly contagious communicable disease that presents a serious risk of harm to the public health." Directs the labor agency to develop a "model airborne infectious disease exposure prevention standard" with minimum requirements including procedures and methods for "compliance with applicable engineering controls such as proper air flow, exhaust ventilation, or other special design requirements.... The agency's model plans include a number of ventilation/filtration best practices as "advanced controls" that schools should consider during an outbreak "where the Minimum Controls alone will not provide sufficient protection for employees." (See https://dol.ny.gov/ny-hero-act.)