The Potomac River, known as "the nation's river," has been named the most endangered river in the country by the national nonprofit American Rivers. The ranking was based on future risks to water availability, water infrastructure needs, and pollution. This comes after a massive sewage spill and the ongoing construction of data centers across the watershed. The groups are urging state and federal governments to invest in wastewater projects and restore grants through the Clean Water Act that have been halted in recent years. They also highlighted the need for a watershed-wide analysis of the impacts of water discharge from data centers.