Byline Stories - NewsMarlborough Marlborough's MacDonald Beach closed due to E. coli By Community Advocate - July 19, 2012 48 FacebookTwitterEmail Click me to copy current URL Marlborough – City officials have announced that MacDonald Beach on Cullinane Drive has been closed today due to exceedingly high E. coli counts. Re-testing will take place later today with updated results expected to be received by Friday, July 20.