Overview
- Massachusetts DPH reported cyanobacteria counts and toxin levels below guideline thresholds at sampled locations covering the regatta course, including microcystin and anatoxin-a.
- The Boston Public Health Commission lifted advisories for Magazine Beach and Boston University’s DeWolfe Boathouse, and officials said the Head Of The Charles will proceed without water-quality restrictions.
- Some stretches downstream remain under a cyanobacteria advisory, with additional sampling scheduled next week to confirm continued improvement.
- Earlier sampling this month showed multiple sites above the 70,000 cells per milliliter threshold, including a 250,000 reading at MIT’s Richard J. Resch Boathouse.
- Health agencies and regatta organizers continue coordinated updates and advise avoiding contact with visibly affected water and preventing pets from ingesting scum.