The Environmental Protection Agency released a report September 6 finding that holes in data on flooding, groundwater depletion, and wetland loss make it difficult to determine how vulnerable the country’s water quality and aquatic ecosystems are to the effects of climate change. The report, Aquatic Ecosystems, Water Quality, and Global Change: Challenges of Conducting Multi-Stressor Vulnerability Assessments, identifies 53 of 600 environmental indicators considered that could be used to give a comprehensive view of aquatic ecosystem vulnerability, but does not evaluate the actual impacts of climate change on the ecosystems.