ResourcesGlossary: testing
Pre-mitigation test
Short answer
A pre-mitigation test is a radon test taken before a mitigation system is installed. It sets the starting level the system has to bring down.
What pre-mitigation test means
EPA recommends that the
The same term appears in public data. CDC's radon testing figures for counties and states are pre-mitigation results, and CDC notes that they include test results not designated as pre- or
How much a system has to take off
Each row works out the reduction that brings a pre-mitigation result down to 4
| Pre-mitigation result, pCi/L | Reduction to reach 4 | Reduction to reach 2 |
|---|---|---|
| 6 | 33.3% | 66.7% |
| 8 | 50% | 75% |
| 12 | 66.7% | 83.3% |
| 20 | 80% | 90% |
What it means for your home
Keep the report. It is what the contractor designs from, and it is the number the test after the work is compared with.
If your result came from a single
Where to go next
- Radon mitigation cost estimator. Turn the starting level and your foundation into a price range for the fix.
- Radon mitigation: how a home is fixed. From the high result to the system and the test after it.