In the St. Louis region, many residents are exposed in ways that don’t look dramatic—no obvious “spill,” no immediate warning. Instead, cases often involve:
- Indoor air problems tied to HVAC changes, filtration upgrades, or ventilation failures
- Dust and debris during remodels, roof work, landscaping, or remediation
- Chemical odors associated with cleaning products, pest control, coatings, or maintenance work
- Recurring symptoms that flare after specific locations—an employer site, a rental unit, or a frequently used room
The fastest way to move forward is to build a tight timeline. Not a guess—an evidence-based record showing what you noticed, when you noticed it, and what environmental or work activities were happening around the same dates.


