Boston rivers are cleaner. But sewage, climate change threaten progress. —WBUR

“School’s out, and grades are in for Boston’s three major rivers,” writes WBUR Environmental Reporting Fellow Vivian La.

This month, we released our annual Charles River Water Quality Report Card, showing grades from A to C+ across different stretches of the Charles River. The article featured a quote from River Science Extern Marilena Lima, “ Significant improvements in water quality have followed fixes to sewage infrastructure, said Marielena Lima, river science program manager for the Charles River Watershed Association. ‘But we have fixed all of the small things that we could fix. And so at this point, it really requires more resources and more willpower from the public to really push these changes that need to happen,’ she said.”