In San Mateo, exposure allegations commonly come from day-to-day contact rather than large-scale industrial use. People may report scenarios such as:
- Landscaping and lawn treatment at homes, condos, and managed properties (including recurring seasonal spraying)
- Working around treated areas—groundskeeping, maintenance, warehouse or facility operations, and custodial roles where vegetation is managed
- Secondhand exposure from residue on work gloves, boots, clothing, or equipment brought indoors
- Community-adjacent exposure, where spraying occurs near walking paths, building perimeters, or areas maintained by contractors
Because these exposures can be spread out over time, the most persuasive cases are usually built around specific time windows, where and how contact occurred, and how that lines up with diagnosis and treatment.


