Once you receive your ERMI results, the most important number is your ERMI score.
Scores typically range from -10 to +50.
Here’s a simple way to understand them:
ERMI Score Guide
ERMI 0 or Below
Generally considered below or near average mold levels.
ERMI 1–5
Mildly elevated mold levels. May suggest minor moisture issues.
ERMI 6–10
Moderately elevated mold levels. Further investigation recommended.
ERMI Above 10
Significantly elevated mold levels. Professional evaluation usually recommended.
Important Things to Remember
- ERMI scores do not diagnose health problems
- Higher scores suggest more mold presence
- Lower scores suggest less mold
- Results should be considered with home history and inspection
ERMI testing is best used as part of a bigger picture, not the only decision‑making tool.
