A rash of beach closures south of Boston in the past two months can be attributed to dry summer weather followed by heavy rains, but, overall, beaches on the South Shore and along the south coast are cleaner than they’ve ever been, officials say. When high levels of contaminants are detected, it is probably due to heavy rainfall overwhelming older drainage and sewer systems and dumping that water directly into the ocean.
Unlimited access to BostonGlobe.com for only 99 cents for the first 4 weeks.Sign up
Are you a home delivery subscriber?
Get FREE access as part of your print subscriptionStart Here
Contact us for help