Cleaner River, Big Win: Alexandria Hits 90% Reduction in Sewage Overflows
AlexRenew Milestone Shows Early Environmental Gains as Major Infrastructure Project nears Completion
ALEXANDRIA, VA — AlexRenew has announced a major milestone in its ongoing RiverRenew program: the Hooffs Run Interceptor—one of the project’s primary components—has already reduced combined sewer overflows (CSOs) into Hooffs Run by 90 percent. The improvement comes ahead of the full completion of the RiverRenew system and represents a significant step toward cleaner, healthier waterways in Alexandria.
“When our newest pumping station is complete and the entire RiverRenew system is operational, we’ll ultimately see a 99% reduction in combined sewer overflows at Hooffs Run,” said Matt Robertson, AlexRenew’s Director of Communications. “It’s encouraging to see how this once-in-a-generation initiative is already helping to reshape the future of Alexandria’s waterways.”
Once complete, the full RiverRenew program will capture and convey approximately 120 million gallons of combined sewage each year, preventing harmful combined sewer overflows from entering the Potomac River and its tributaries. While the program’s remaining components—including the massive waterfront tunnel—are expected to come online in 2026, the early success at Hooffs Run demonstrates the transformative impact the project will have on both the community and the environment.
“We’ve witnessed tremendous support from our community as we enter the final stages of Alexandria’s largest-ever infrastructure project,” Robertson added. “Our new, massive underground pumping station is quickly taking shape at the heart of AlexRenew’s treatment plant, and we’ll be ready to accept and treat millions of gallons of combined sewer flows this year.”
AlexRenew has also made several community-focused improvements in the area surrounding Hooffs Run. In 2025, residents celebrated the restoration of African American Heritage Park, the installation of new wayfinding signage highlighting the stories and contributions of Black Alexandrians, and the planting of native trees and vegetation throughout the park.
Together, these investments reflect AlexRenew’s commitment not only to protecting public health and improving local waterways, but also to honoring Alexandria’s cultural heritage and strengthening community spaces.
