(a) If the commissioner of state health services or one or more health authorities determine that the introduction of an environmental or toxic agent into the environment has occurred, the commissioner or authorities may impose an area quarantine in the manner and subject to the procedures provided for an area quarantine imposed under Section 81.085. The commissioner of state health services or a health authority may, with respect to an area quarantine imposed under this chapter, exercise any power for a response to the introduction of an environmental or toxic agent into the environment under this section that is authorized by Section 81.085 for a response to an outbreak of a communicable disease. The area quarantine must be accomplished by the least restrictive means necessary to protect public health considering the availability of resources.
(b) A quarantine imposed by a health authority under this section expires at the earlier of:
(1) the 24th hour after the time the quarantine is imposed; or
(2) the time that appropriate action to terminate the quarantine or impose superseding requirements is taken under Chapter 418, Government Code, or is taken by the commissioner of state health services under this section.