 And she says testing for fecal bacteria continue to show results that are too low for public concern. Unrelated to the E. coli outbreak, the upper section of North Anna Branch of Lake Anna in Louisa County remains under a swimming advisory due to a harmful algae bloom. Mike Murillo, WTOP News. 10.06 on WTOP. More than 60 million people nationwide are hitting the road for the July 4th holiday. For our area, it's about 2 million people on the move.