ORANGE, Mass. (WWLP) – Lake Mattawa, a 112-acre lake in Orange, has reopened to swimming after being closed due to high levels of E. coli bacteria in the water. 

According to the town’s website, on Wednesday the Board of Health urged residents to not swim in the lake after water quality testing showed high levels of E. coli bacteria. As of noon Thursday, the test results conclude that the bacteria levels have receded and the lake is now open for use.

Most people infected with E. coli have severe stomach cramps, diarrhea and vomiting. Symptoms usually start three to four days after swallowing the bacteria, and most recover without treatment after five to seven days.