Boston’s mix of dense neighborhoods, older building stock, active construction, and year-round maintenance means chemical incidents can arise in a variety of settings, including:
- Construction and renovation sites: improper handling of solvents, adhesives, sealants, degreasers, and cleaning chemicals.
- Buildings with frequent maintenance: unsafe use of pesticides, disinfectants, mold-treatment products, or pool/spa chemicals in managed properties.
- Workplaces with industrial or specialty materials: manufacturing, warehousing, laboratories, and facilities where fume exposure can occur.
- Tourism and event-related venues: quick-turn cleaning, specialty coatings, and crowd-heavy spaces where ventilation and safety controls may be overlooked.
Because Boston is so compact, exposure can also affect bystanders—neighbors in adjacent rooms, coworkers nearby, or people sharing common ventilation routes.


