Did You Pass A Radon Test After Using a Short Term Radon Test Kit?

After sending your short term radon test kit in for analysis you will receive a results report. If you live in the USA your short term radon test kit results will be reported in units called picocuries per liter (pCi/l). If you live outside of the USA your short term radon test kit results will be reported in Becquerels per cubic meter (Bq/m-3).

Your next question of course is did my home pass the radon test. To answer this question we first have to know if this short term radon test kit result was a screening (your first) radon test or if it was a follow-up test.

Use these guidelines for a short term radon test kit screening test result to see if you pass radon test:
  • If any of your screening short term radon test kit results are between 2 pCi/l and about 10 pCi/l, then you did not pass radon test. You should retest all key living areas of your home for up to 1 year. Use our model AT-100 long term radon detector kits.
  • For short term radon test kit results are above 10 pCi/l, you should do a follow-up test in all key living areas with another short term radon test kit because you did not pass radon test. Because your screening short term radon test kit results are more than twice the EPA action level, we recommend the ST-300 short term radon test kit for your follow-up test.
  • If your short term radon test kit results are below 2 pCi/l (75 Bq/m-3) then you pass radon test. You should consider doing a year long test with a long term (AT-100) radon detector or retest with a short term radon test kit (ST-100) during a different season.

Use these guidelines to see if you pass follow-up radon test:
  • If you followed-up with a long term test and your result is 4 pCi/l (150 Bq/m-3) or more, US EPA says you should fix your house. You did not pass radon test.
  • If you followed up with a second short radon term test kit: The higher your short term radon test kit results, the more certain you can be that you should fix your home. You should probably fix your home if the average of your first and second test is 4 pCi/l (150 Bq/m-3) or higher. You did not pass radon test.

To get more help choosing the right radon test kits for your home use our Radon Testing Wizard . Or if you know which test you need you can go directly to the order page.


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