Indiana Code Title 13. Environment § 13-18-12-8

(1) determines that an upset has occurred in the publicly owned treatment works that is likely to pose a threat to human or animal life;  or

(2) has knowledge of an imminent threat from a chemical or other release to the collection system that is likely to cause an upset in the publicly owned treatment works that is likely to pose a threat to human or animal life;

(1) must notify all appropriate state and local government agencies;

(2) may provide technical assistance to the publicly owned treatment works as the department determines is necessary;  and

(3) must, if the department determines that there is or may be a threat to human health or animal life, notify the affected news media;