The county spent $500,000 to replace aging pipes earlier this month after a main conduit ruptured in the aftermath of Hurricane Irene and poured about 100 million gallons of raw sewage into the river over the course of a week.
The county's health department continues to monitor water quality daily in the area of the river affected by the overflows. The agency makes results of those tests available on its website. Signs are posted along the river warning residents to avoid the water, which, officials said, remains unsafe to swim or wade in — or even to touch. Anne Arundel County's health department has also issued a warning covering the downstream stretch of the Patapsco River.