Water Quality Criteria Development and Transparency Act

This bill requires the EPA Administrator to develop new or revised water quality criteria through formal rulemaking (not guidance) and mandates judicial review for these criteria. It directly affects the EPA's process for setting national water quality standards that states use to regulate pollution in rivers, lakes, and coastal waters. Key changes include amending the Clean Water Act to specify that criteria must be issued "by rule" and adding judicial review authority for EPA's criteria decisions under section 304(a)(10). The bill does not change the criteria themselves, only the procedural steps for their development and legal challenge.