Publicly Owned Treatment Works Biomonitoring Use Act - Amends the Federal Water Pollution Control Act to provide that if the Administrator of the Environmental Protection Agency determines that, in the control of toxicity it is necessary to include biological monitoring, testing, or assessment methods as a condition of a permit issued to a publicly owned treatment works, the failure of a single whole effluent toxicity test shall not result in a finding of violation. Makes it a violation of this Act if the treatment works fails to comply with a schedule or other permit condition to identify and control toxic discharges.