Health Effects and Occupant Concerns
Health effects and occupant concerns
This domain tests how you discuss mold and health without diagnosing, and how you document occupant complaints objectively.
Mechanisms
Fungal exposure acts through three routes. Allergic: IgE-mediated rhinitis, conjunctivitis and asthma exacerbation, plus hypersensitivity pneumonitis after repeated high exposure. Irritant: microbial volatile organic compounds, glucans and fine particles cause eye, nose and throat irritation and headache. Infectious and toxic: opportunistic infection, notably Aspergillus fumigatus in immunocompromised people, and mycotoxins such as trichothecenes from Stachybotrys chartarum, which require ingestion or inhalation of spores or fragments.
No exposure standards
There is no OSHA permissible exposure limit, EPA threshold or residential numerical limit for indoor mold spores. WHO (2009), AIHA and EPA converge on one message: dampness and mold are associated with respiratory symptoms, and the remedy is moisture control and physical removal, not a target spore number.
Sensitive populations
Infants, older adults, people with asthma or chronic lung disease, and immunocompromised occupants carry higher risk. Their presence justifies faster remediation and clearer communication.
What an inspector may and may not say
You may describe visible growth, musty odor, moisture readings and likely pathways, and recommend professional remediation plus medical evaluation. You may not diagnose, state that mold is or is not causing symptoms, label a building "toxic," or guarantee a building is "safe." Avoid "toxic black mold" - it is a media term, not a technical one.
Worked example
A parent reports a coughing child and visible growth in a bedroom closet. Report the growth, the moisture source and the area affected; recommend remediation by a qualified contractor, relocation of sleeping areas until correction, and consultation with the child's physician. Never write that the mold is causing the child's asthma.
Traps
Claiming mycotoxins are always airborne; recommending bleach as a health fix; offering medical opinions; describing a structure as mold-free after remediation.