High results are common enough here that testing should be routine, like checking a smoke alarm.
Start with a test
You can test your own home or hire a certified testing business. Short-term tests take two to four days. Long-term tests run 90 to 365 days and smooth out the seasonal swings. Close windows and doors 12 hours ahead of a short-term test, and set the device on the lowest level people live in. Full details on the testing page.
Selling or buying in Richmond
Rhode Island's seller disclosure includes a radon item and a notice that testing before purchase is advisable. In a town with Richmond's numbers, buyers tend to ask. Sellers who test ahead of listing avoid a surprise during the inspection period, and sellers with an existing system should have any post-installation test results ready. See radon and home sales.
Private wells
Many Richmond homes draw water from a private well, and well water can carry radon into the house. There's no state or federal standard for radon in private well water. If your air test is high, ask about testing the water. See radon in well water.
Fixing a high level
Mitigation in Rhode Island is done by licensed radon mitigation contractors. Test again after installation to confirm it worked. If you already have a system, check that the fan is running and retest every few years.