Findings of the toxic chemical compound in a Prince George’s County creek prompted the warning. MDE is awaiting results after sampling in other areas, including Baltimore.

“Aggressive action is necessary,” the watchdog group says. “These plants are discharging millions of gallons of pollution directly into local waters – in some cases over 400% the permit limits.”

DPW attributes the release of sewage into the Chesapeake Bay to the Covid pandemic and 2019 ransomware attack and says it is working to do better.