Improving Water Quality Certifications and American Energy Infrastructure Act

This bill amends Section 401 of the Clean Water Act to clarify and streamline water quality certifications for energy infrastructure projects. It requires states and the EPA to publish certification requirements within 30 days of enactment, set strict 90-day deadlines for requesting missing information, and base decisions solely on specific Clean Water Act sections (301, 302, 303, 306, 307). The changes replace vague terms like "water quality requirements" with precise references to these sections and mandate written explanations for certification decisions. It directly affects states, interstate agencies, and the EPA as they process certification requests for projects like pipelines or power plants.