But imagine if its waters were compromised—a chemical spill, severe drought, or infrastructure failure could result in immediate, widespread disruption.

A new report by the Interstate Commission on the Potomac River Basin estimates that a major event affecting the river could cost the region nearly $15 billion within the first month alone.

Without the Potomac, businesses would close, hospitals would struggle, and millions would face an emergency with no immediate backup water supply. The first day alone could result in $146.9 million in losses, with compounding impacts as businesses shutter and people lose jobs. The federal government, too, would feel the hit, missing out on hundreds of millions in tax revenue.

Policymakers and residents must recognize the economic lifeline the Potomac provides. As Jack McDougle, President and CEO of the Greater Washington Board of Trade, emphasized: “Our region’s economic vitality and quality of life are directly tied to clean, reliable water resources.” With no major reservoir nearby, the need for federal investment in crucial infrastructure is urgent.

This is not just about prevention—it is about safeguarding the future of the D.C. region’s economy, health, and daily life. The report calls for partnerships to improve water supply resilience, highlighting the massive costs that would arise from inaction.

As Mae Stevens, CEO of the American Business Water Coalition, pointed out: “Compared to the cost of what could go wrong, this is an ounce of prevention to keep several pounds of harm from happening.”

INTERSTATE COMMISSION ON THE POTOMAC RIVER BASIN STRATEGIC PLAN