https://www.bostonglobe.com/metro/2019/05/25/seven-beaches-greater-boston-aced-water-quality-tests-last-year/h8LT43a4Q4V902Y266rqmO/story.html

SWAMPSCOTT — Water quality grades are in for urban beaches in Greater Boston and, for the most part, the ocean is clear.

More than half of the 15 beaches where the nonprofit group Save the Harbor/Save the Bay conducted testing last year posted perfect water quality scores, meaning all samples examined for bacteria were deemed safe for swimming under state public health standards.

At the bottom of the rankings were King’s Beach on the Lynn-Swampscott line and Tenean Beach in Dorchester, where bacteria levels were considered unsafe during about a quarter of last year’s swimming season.

The water quality findings for beaches from Hull to parts of the North Shore were made public Sunday in an annual report from Save the Harbor/Save the Bay.