Affiliate disclosure: This page contains affiliate links. If you purchase through our links, we may earn a small commission at no extra cost to you. Learn more.
Lab-certified dust sampling that tests for 36 mold species and returns a standardized risk score.
Typical price range: $150 – $200
Why We Recommend It
ERMI (Environmental Relative Moldiness Index) is the gold-standard mold test used by industrial hygienists and physicians treating mold illness. It analyzes settled house dust rather than just air, giving a more accurate picture of long-term mold exposure in your home.
Key Benefits
- ✓Tests for 36 mold species including toxic Stachybotrys chartarum (black mold)
- ✓Returns a standardized ERMI score used by doctors and inspectors
- ✓Dust sampling captures long-term exposure history, not just current air quality
- ✓Pre-paid lab analysis included with results in 5 to 7 business days
- ✓Used by physicians to assess and diagnose mold-related illness (CIRS)
📊 An ERMI score above +2 indicates elevated mold risk and may warrant professional assessment.
Ready to buy? Check the current price on Amazon.
As an Amazon Associate, Mold Action Plan earns from qualifying purchases.
When to Use It vs. When to Skip It
✅ When to Use
When you suspect mold illness, after visible mold is remediated to confirm clearance, or when performing due diligence on a home purchase.
❌ Not the Right Tool For
ERMI identifies the presence of mold in dust but does not locate the source. Pair with a visual inspection or industrial hygienist assessment to find the origin.
View on Amazon ›
Affiliate link — we earn a small commission if you purchase, at no extra cost to you.