Responding to Indoor Mold Concerns: A Resource for Environmental Public Health Professionals
Table 1. Rapid-Response Guidance for Responding to Indoor Mold Concerns
1. CONDUCT OR SUPPORT INDOOR MOLD ASSESSMENTS
2. CONSULT ON REMEDIATION AND MOLD CLEANUP ACTIONS
3. COMMUNICATE FINDINGS, GUIDANCE, AND HEALTH RISK INFORMATION
Determine need, responsibility, or authority to conduct or support an indoor assessment, while taking into consideration facility or building type and occupancy, including special populations. Identify applicable regulatory requirements or laws addressing mold and sanitation, depending on facility type. Conduct or support indoor assessments to understand water and moisture sources (e.g., flooding, leaks) and if mold growth has occurred. Observe mold growth, moisture presence, water sources, and humidity.
Recommend fixing roof or plumbing leaks, and other structural deficiencies leading to water intrusion or moisture and maintaining indoor humidity between 30% and 50%. Suggest cleaning hard surfaces using a detergent and water. Recommend considering use of mold-killing chemical products, including a solution of no more than 1 cup of household laundry bleach in 1 gallon of water. Encourage drying water-damaged materials within 24–48 hr. Consider discarding items that remain wet beyond this period, especially porous materials (e.g., carpets, upholstery, fabrics), and if the water or moisture source might contain fecal contamination, hazardous chemicals, or other contaminants. Recommend wearing personal protective equipment (PPE), including long gloves and eye protection. Use an N95 respirator to avoid breathing in mold or mold spores during cleanup (requires fit-testing in occupational settings). Suggest contacting a remediation contractor if mold- contaminated areas are >10 ft².
Report assessment findings and provide guidance and answer questions about remediation, cleanup, and potential exposure risks and health effects.
Establish key messages while considering language, cultural, and literacy needs and disseminate communications using a variety of media and channels, including digital platforms and social media. Coordinate communication efforts during emergency response operations.
Escalate requests for assistance in complex situations such as disasters with widespread community impacts or special populations with increased health risks.
Make referrals to government agencies that could provide resources for remediation and cleanup.
Consider conducting a verification survey to ensure indoor mold and moisture issues have been successfully resolved following remediation and cleanup.
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