Ariz. Rev. Stat. § 49-251
A. A facility owner or operator may apply for, and the director may issue, a temporary emergency waiver of compliance with the requirement to obtain a permit or with any applicable permit requirement, surface or aquifer water quality standard or discharge limitation if the waiver will not endanger human health or welfare, and if the director finds any of the following:
2. That there has been a breakdown of equipment or upset of operations resulting in a discharge to waters of the state in excess of one or more water quality standards or discharge limitations, and both of the following apply:
C. As a condition to the issuance of a temporary emergency waiver of compliance, the director may require the facility owner or operator to provide notice of the waiver to all downstream or downgradient users directly affected by both: