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D.C. Launches E. Coli Testing After Potomac Interceptor Collapse

3/1/2026

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Summary

Story summary

Washington, D.C., will begin E. coli testing in the Potomac and Anacostia rivers on March 2 after the Potomac Interceptor collapse.
Muriel Bowser, the Mayor of Washington, D.C., announced the measure to protect public safety as emergency repairs conclude.
Testing will occur at six monitoring stations, with results posted online within 48 hours.
Health officials anticipate lifting the advisory on March 2 if normal levels persist for 21 days.

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Story summary

Washington, D.C., will begin E. coli testing in the Potomac and Anacostia rivers on March 2 after the Potomac Interceptor collapse.
Muriel Bowser, the Mayor of Washington, D.C., announced the measure to protect public safety as emergency repairs conclude.
Testing will occur at six monitoring stations, with results posted online within 48 hours.
Health officials anticipate lifting the advisory on March 2 if normal levels persist for 21 days.