Conservation Law Foundation’s affidavit of Bethany M. Haley, public-health researcher

Court docket no.: 1981-2 Date: July 17, 2026 Dr. Bethany M Haley is a researcher whose peer-reviewed work links CSO events to gastrointestinal illness in Massachusetts communities. This is the scientific backbone of CLF’s public-health argument.

“There are three commonly accepted possible exposure pathways to pathogens from CSO discharges. The most well-supported of these is incidental ingestion while recreating. Some studies have also found a link to AGI from drinking water drawn from CSO waters, and there is emerging research on the potential for aerosolized contaminated water to cause illness when inhaled.”