June 19, 2025 Bacteria Results

6/19/25 Bacteria Results are in.

In total, there were 28 failing sites: 19 on the South River, 7 on the West and Rhode rivers, and 2 on the Mainstem Bay. There was only 1 passing site: Columbia Beach.

This is a test for enterococcus, an indicator of E. coli. Samples are collected Thursday mornings and processed by Anne Arundel Community College. Please note that bacteria levels can increase after major rain events. Arundel Rivers follows EPA guidelines and the recommended threshold of 104cfu/100mL for recreational swimming. Please remember to follow the golden rules of swimming.

-Don’t swim after a major rain event

-Don’t swim with any open cuts or wounds

-Always check SwimGuide.org before swimming

-Learn more about our program at arundelrivers.org