We place the monitor
A continuous radon monitor goes in the lowest level of the house that is, or could be, lived in. It can go in on the day of your home inspection, so there's no separate trip to set it up.
Radon is a radioactive gas you can't see, smell or taste, and the EPA says it is the leading cause of lung cancer among people who don't smoke. We place a continuous monitor in the house, collect it two days later, and send you the results.
We looked at 133 of our own radon test reports from May to October 2026. 114 of them measured below 2.0 pCi/L. But 13 measured 2.0 to 3.9, the range where the EPA says to consider fixing it, and 6 were at or above the EPA action level of 4.0. The highest was 10.7 pCi/L in Lincolnton, more than twice the action level.
Five of the six high results were in Gaston and Lincoln counties, west of Charlotte; the sixth was in Indian Land, SC. That's a small number of tests, so it can't tell you which areas are safe. A low neighborhood doesn't mean a low house.
| Area | Tests | 2.0 to 3.9 | 4.0 or higher |
|---|---|---|---|
| Mecklenburg County | 54 | 4 | 0 |
| Cabarrus County | 17 | 4 | 0 |
| Gaston County | 15 | 1 | 2 |
| Union County | 12 | 1 | 0 |
| Iredell County | 9 | 1 | 0 |
| York County, SC | 7 | 1 | 0 |
| Lincoln County | 5 | 0 | 3 |
Our own reports, May to October 2026. Only counties with at least 5 tests are shown (14 tests, including one high result, are left out). Counties are based on town names. A county with no high results is not proof the county is low. Every house is different; these numbers show it is worth testing, not what any one house will read.
A continuous radon monitor goes in the lowest level of the house that is, or could be, lived in. It can go in on the day of your home inspection, so there's no separate trip to set it up.
The monitor takes readings every hour. The house stays closed up, with windows and outside doors shut except for normal coming and going, from 12 hours before the test until it ends. Our monitors are calibrated every year.
We collect the monitor and send you the report: the average level for the test plus the hour-by-hour readings. We send it to your agent too, if you'd like.
High radon is usually fixed with a mitigation system, a pipe and fan that vent the gas from under the house to above the roof. A certified radon mitigation professional installs it and the house is retested. Buyers can negotiate it with the seller, so it pays to test before your due diligence period ends.
It can be. We looked at 133 of our own radon test reports from May to October 2026. 19 of them (about 1 in 7) measured 2.0 pCi/L or higher, and 6 were at or above the EPA action level of 4.0. Five of those six were in Gaston and Lincoln counties, west of Charlotte. Radon levels depend on the soil, how the house is built, ventilation and weather, so two similar homes on the same street can test very differently. The only way to know about the house you are buying is to test that house.
The EPA recommends fixing a home at or above 4.0 picocuries per liter (pCi/L), and suggests considering it from 2.0 up to 4.0. There is no level of radon that is known to be completely safe.
The monitor runs for at least 48 hours. The house needs to stay closed up, with windows and outside doors shut except for normal coming and going, starting 12 hours before the test and all the way through it. You usually have results about two days after we place it.
Yes. New and older homes can both have high radon. A home’s age, price or condition can’t tell you its radon level; only a test can.
High radon is usually fixed with a mitigation system: a pipe and fan that pull the gas from under the house and vent it above the roof. It should be installed by a certified radon mitigation professional (NRPP or NRSB), and then the house is retested to confirm the level came down. Buyers can negotiate it with the seller; your agent can help with the timing in your contract.
Yes. We can place the monitor on the day of your inspection, so there’s no separate trip to set it up. We come back to collect it, and the radon report follows once the test is done.
We can place the radon monitor on the same visit. See what a full inspection covers.
What we see in Charlotte homes, and how we inspect them.
Placed and collected by us, with results in about two days.