New report names Potomac River most endangered in the US

A new report from American Rivers has designated the Potomac River, often referred to as the "Nation's River," as the most endangered river in the United States for 2026. This alarming designation stems from a combination of factors, including a massive raw sewage spill earlier this year and the unchecked proliferation of data centers across the Potomac watershed, primarily in Northern Virginia and parts of Maryland. The report highlights the failure of the Potomac Interceptor sewer line, which discharged an estimated 200 to 300 million gallons of untreated wastewater into the river, causing bacteria levels to surge thousands of times above safe recreational limits. This incident has raised critical concerns about the region's aging infrastructure. Simultaneously, environmental groups, including the Potomac Riverkeeper Network, warn that approximately 1,200 data centers are proposed, under development, or in the permitting process, threatening to strain water resources due to their significant cooling and wastewater management demands. While data center proponents argue their importance to the regional economy, environmental advocates contend that the rapid pace of development is outstripping comprehensive oversight. They express particular concern about the cumulative impacts on waterways, stormwater runoff, and drinking water sources. Despite recent improvements in river health, the report emphasizes that without immediate and stronger safeguards, infrastructure failures and increased water demand from data centers could reverse conservation progress.