BROOKSVILLE — The Hernando County Utilities Department issued a boil water notice for residents of the Brookridge community Monday after a well tested positive for E. coli bacteria. Routine testing showed the contamination late last week, and the county immediately took the well off line. No contamination was found in the distribution system, and there were no reports of any residents becoming ill. Brookridge residents were asked to boil water for at least a minute for drinking, making ice, brushing teeth, washing dishes and food preparation. E. coli can cause diarrhea, cramps, nausea, headaches or other symptoms and may pose a special health risk for infants, young children and people with compromised immune systems. The well will be inspected and tested further, and utilities officials anticipated resolving the problem within 72 hours.