**Reno's Runoff: AC Mines Fueling Lung Mold?**

By Franklin Everett Shaw

January 6, 2026

The air in Reno, Nevada, whispers tales of silver booms and bust cycles, but beneath the surface of its vibrant casinos and outdoor adventures lies a hidden threat: the legacy of historical mining. While the Comstock Lode made millionaires, it also left behind a trail of environmental concerns, including the potential for heavy metal contamination and, surprisingly, mold growth fueled by altered soil composition and water runoff. For residents, especially those with pre-existing respiratory conditions, this can translate to a heightened risk of Aspergillus lung infections, a serious and often overlooked health concern.

The connection between old AC mine runoff and Aspergillus isn’t immediately obvious, but it’s a plausible scenario. Mining activities often disrupt the natural soil structure, bringing heavy metals and other minerals to the surface. This altered soil chemistry can create favorable conditions for certain types of mold, including Aspergillus, to thrive. When rainwater washes through these contaminated areas, it can carry mold spores into residential areas, particularly those located near waterways that were historically used for mining operations.

So, what can a concerned Reno homeowner do to protect themselves and their families? Let’s break it down into actionable steps.

First, assess your risk. Do you live near the Truckee River, Steamboat Creek, or other waterways that may have been affected by historical mining activities? Are you downwind from areas known to have old mine tailings? Do you have a history of respiratory problems, such as asthma or COPD? Answering yes to any of these questions increases your potential risk.

Next, test your home’s air quality. Don’t rely on visual inspections alone. Aspergillus spores are microscopic and can be present even if you don’t see visible mold growth. Several options are available for air quality testing:

• DIY Mold Test Kits: These are readily available at hardware stores like Lowe’s or Home Depot in Reno. They typically involve placing a petri dish with a growth medium in a specific location for a set period, then sending it to a lab for analysis. While affordable (around $30-$50), they may not be as accurate as professional testing.
• Professional Mold Inspection: A certified mold inspector will conduct a thorough assessment of your home, including air sampling and surface testing. This is the most accurate option, but also the most expensive (typically $300-$500). Look for inspectors certified by organizations like the Indoor Air Quality Association (IAQA) or the American Council for Accredited Certification (ACAC). Local Reno companies like “Mold Solutions of Reno” or “Environmental Services Group” can provide these services.
• ERMI Testing (Environmental Relative Moldiness Index): This test uses DNA analysis to identify and quantify the types of mold present in a dust sample. It’s a more comprehensive approach than traditional mold testing and can provide valuable information about the overall mold burden in your home. You can purchase ERMI test kits online and send the sample to a certified lab.

When interpreting your test results, pay attention to the specific types of mold identified and their concentrations. While some Aspergillus species are harmless, others can cause serious infections, especially in individuals with weakened immune systems or pre-existing lung conditions. Consult with a medical professional if you have concerns about your health.

If your air quality test reveals elevated levels of Aspergillus or other molds, it’s time to take action to mitigate mold exposure. This may involve:

• Addressing Moisture Problems: Mold thrives in damp environments. Identify and fix any leaks, plumbing issues, or areas of high humidity in your home. Ensure proper ventilation in bathrooms and kitchens. Consider using a dehumidifier, especially in basements or crawl spaces.
• Professional Mold Remediation: For significant mold infestations, it’s best to hire a certified mold remediation company. They have the expertise and equipment to safely remove mold and prevent its recurrence. Be wary of companies that offer extremely low prices, as they may not be using proper techniques or following industry standards.
• Air Purification: Consider using a HEPA (High-Efficiency Particulate Air) filter air purifier to remove mold spores and other allergens from the air. Choose a purifier that is appropriately sized for the room you’re using it in.
• Improving Ventilation: Increase airflow in your home by opening windows (when outdoor air quality is good) and using fans. This can help to reduce humidity and prevent mold growth.
• Landscaping Considerations: If you live near a waterway or area with potential mine runoff, consider landscaping your property to divert water away from your home’s foundation. This can help to prevent moisture from seeping into your basement or crawl space.

It’s also crucial to seek medical advice if you experience symptoms of Aspergillus lung infection, such as coughing, wheezing, shortness of breath, fever, and chest pain. Early diagnosis and treatment are essential to prevent serious complications.

In Reno, several medical resources specialize in respiratory conditions and fungal infections:

• Renown Regional Medical Center: This hospital has pulmonologists and infectious disease specialists who can diagnose and treat Aspergillus infections.
• Saint Mary’s Regional Medical Center: Similar to Renown, Saint Mary’s offers comprehensive respiratory care services.
• Northern Nevada Medical Group: This group practice has physicians specializing in pulmonary medicine and allergy/immunology.

When consulting with a doctor, be sure to mention your concerns about potential mold exposure from mine runoff. This information can help them to make an accurate diagnosis and recommend the appropriate treatment plan.

One common mistake developers face when dealing with mold issues is underestimating the extent of the problem. Mold can grow in hidden areas, such as behind walls or under flooring, making it difficult to detect. Another pitfall is attempting to remediate mold without addressing the underlying moisture source. If the moisture problem isn’t fixed, the mold will simply return.

To overcome these challenges, it’s essential to conduct a thorough investigation to identify all sources of mold and moisture. This may involve hiring a professional mold inspector or contractor. It’s also important to follow proper remediation protocols to ensure that the mold is completely removed and that the area is properly disinfected.

Finally, remember that preventing mold growth is always better than treating it. By taking proactive steps to control moisture, improve ventilation, and maintain your home, you can significantly reduce your risk of Aspergillus exposure and protect your health. Don’t let the hidden legacy of Reno’s mining past compromise your well-being. Take control of your indoor environment and breathe easier.