Rowers on the Potomac River. (Astrid Riecken/For The Washington Post)

What a relief to read good news in the March 28 Metro article “Potomac is healthier than in decades.”

In recent years, the District has made a concerted effort to improve the health of the Potomac River, implementing storm-water management projects and upgrading the Blue Plains water treatment plant. We are beginning to see a cleaner Potomac, rebounding waterfowl and fish populations, and a reduction of runoff into the Chesapeake Bay.

The article highlighted this success story, but it failed to fully capture the fragility of this progress. We are nearing a tipping point, but the health of the Potomac is complex, unpredictable and capable of backsliding. At this critical juncture, we can’t risk complacency. Only with continued local, state, federal and nonprofit collaboration will this momentum toward a healthier Potomac carry us forward.

I remain cautiously optimistic about the recovery of the Potomac. I hope that our commitment to the Potomac will extend to the Anacostia, where lower-income residents and communities of color continue to work to protect and improve the waterway they depend on. All the tributaries in the watershed are worthy of restoration, and the people who live by them deserve clean water.

Rachel Merriman-Goldring, Arlington