When you move to Omaha, you quickly learn that basements are a normal part of local life. They provide storage, storm shelter space, playrooms, home offices, gyms, and sometimes an entire extra living area. They also make one home-safety question especially important: Has the house been tested for radon?
Radon is not a reason to avoid buying or renting a home in Omaha. It is a reason to test. The gas cannot be seen, smelled, or tasted, and a house can have an elevated level even when the home next door does not. Fortunately, testing is straightforward and elevated levels can usually be reduced with a properly designed mitigation system.
This guide explains why radon matters in Nebraska, what the numbers mean, how testing works, what to look for during an Omaha home purchase, and what to do if a result comes back high.
The Quick Answer: Should You Test an Omaha Home for Radon?
Yes. Nebraska has a high incidence of elevated indoor radon. The Nebraska Department of Health and Human Services reports that more than half of radon tests in the state have produced results above the Environmental Protection Agency action level of 4.0 picocuries per liter, usually written as 4.0 pCi/L.
That statewide statistic does not predict the result for a particular address. It does show why testing should be a routine part of buying, owning, or occupying a lower level in the Omaha metro.
If you are preparing to purchase a house, include radon in your inspection planning. Our guide to buying a home in Omaha covers the rest of the process, from financing and inspections to closing and moving in.
What Is Radon and How Does It Enter a Home?
Radon is a naturally occurring radioactive gas produced as uranium breaks down in soil and rock. Outdoors, it normally disperses into the air. Inside a building, it can enter through openings where the structure meets the ground and accumulate.
Common entry points can include:
- Cracks in concrete floors and foundation walls
- Construction joints
- Openings around pipes, drains, and utility penetrations
- Sump pits and covers that are not sealed
- Spaces around slab edges
- Crawl spaces and exposed soil
A house does not need to have a visible foundation problem to test high. A clean, dry, recently built home can have elevated radon, while an older house nearby may test lower. Home age, price, appearance, and neighborhood are not substitutes for a test.
Why Radon Deserves Attention in Nebraska
The Nebraska Department of Health and Human Services describes radon as a cancer-causing gas and identifies it as the leading cause of lung cancer among people who do not smoke. The EPA estimates that radon is responsible for about 21,000 lung cancer deaths in the United States each year.
The risk comes from long-term exposure, not from briefly entering a basement or touring a house. That distinction matters because a high result calls for a practical response, not panic. Confirm the measurement when appropriate, discuss the result with a qualified professional, and reduce the level.
Radon can be present in any type of home:
- New construction and older houses
- Homes with finished or unfinished basements
- Houses with or without sump pumps
- Split-entry, ranch, two-story, and multilevel homes
- Homes in established Omaha neighborhoods and newer suburban developments
This is also why county or neighborhood averages are not enough. Nebraska’s official radon data notes that elevated results have been found in every county that reported testing data. The only reliable way to understand a specific home is to test that home.
Understanding Radon Test Results
Radon in air is measured in picocuries per liter. The number is commonly abbreviated as pCi/L.
- 4.0 pCi/L or higher: The EPA recommends fixing the home to reduce the radon level.
- Between 2.0 and 4.0 pCi/L: The EPA recommends considering mitigation because no level of radon exposure is considered completely risk-free.
- Below 2.0 pCi/L: The result is below the range where the EPA specifically recommends considering a fix, but it is still sensible to save the report and retest in the future.
The 4.0 pCi/L figure is an action level, not a line between harmless and dangerous air. Think of the result as information that helps you decide what to do next.
Radon levels can also change. Weather, soil moisture, heating and cooling patterns, ventilation, foundation work, and changes to the way a basement is used can affect measurements. A single short-term result is useful, especially during a real estate transaction, but a long-term test provides a better picture of the home’s average level over time.
How Radon Testing Works
You can test with a do-it-yourself kit, hire a licensed radon measurement business, or use an electronic continuous radon monitor. The right option depends on your situation.
Short-Term Tests
Short-term devices are commonly used when a faster answer is needed. Depending on the device, a test may run for a few days or longer. These tests are often used during a home inspection because a purchase contract has limited deadlines.
For a short-term test to be meaningful, the home must follow the device instructions and required testing conditions. EPA guidance calls for closed-house conditions during the test, especially when the test lasts less than one week. Heating and cooling systems should operate normally, but windows should not be left open to artificially dilute the indoor air.
Long-Term Tests
Long-term tests remain in place for more than 90 days. Because radon changes from day to day and season to season, a long-term test is more likely to reflect the home’s annual average.
A homeowner might use a long-term test after moving in, after receiving a borderline short-term result, or simply to better understand conditions through changing Omaha weather.
Where the Test Should Go
The device is generally placed on the lowest level that is regularly used or could be used as living space. In many Omaha houses, that means a finished basement family room, bedroom, office, playroom, or workout area. If the basement is not used, the first floor may be the appropriate location, depending on the test instructions and professional guidance.
A device should be positioned away from drafts, exterior walls, excessive heat, high humidity, and areas where it can be disturbed. Kitchens and bathrooms are usually not suitable testing locations. Always follow the instructions supplied with the device or the testing professional’s protocol.
Try not to schedule a very short test during unusually severe weather or unusually high winds. If a major Omaha storm occurs during the testing period, ask the measurement professional or laboratory whether the conditions could affect the validity of the result.
Testing During an Omaha Home Purchase
If you are buying a house, discuss radon with your real estate agent and home inspector before the inspection is scheduled. That helps prevent a last-minute scramble while your inspection period is already running.
Ask these questions:
- Has the home been tested before?
- When was the test completed, where was the device placed, and what was the result?
- Were major renovations, foundation repairs, HVAC changes, or basement finishing completed after the test?
- Does the home already have a passive or active radon system?
- If a system exists, is the fan operating and is there a post-mitigation test report?
- Who will arrange the current test, and when will the results be available?
An old report can be useful history, but it may not describe current conditions. The EPA recommends testing homes during a purchase and asking whether radon-resistant features were included in new construction.
If the result is elevated, the next step depends on your contract, timing, and professional advice. Buyers and sellers may discuss mitigation, a credit, an escrow arrangement, an additional test, or another solution. A high result does not automatically mean the transaction must end. It means the issue should be addressed clearly before closing.
Radon is only one part of evaluating a lower level. Omaha buyers should also understand moisture management, foundation drainage, sump pumps, backup systems, and finished-basement history. See our Omaha basements and sump pumps guide for those details.
What a Radon Mitigation System Does
The most common residential solution is an active soil depressurization system. It uses a pipe and continuously operating fan to draw radon-containing soil gas from beneath the house and vent it safely outdoors before it enters the living space.
A typical system may include:
- One or more suction points through the basement slab or connected to an appropriate sump area
- PVC piping routed from beneath the slab to an exterior discharge point
- An inline fan located in an approved unoccupied area or outside the living space
- A system monitor that shows whether suction is being maintained
- Sealing around selected cracks, sump lids, and penetrations as part of the overall design
- A post-mitigation test to confirm that the system lowered the radon level
Sealing cracks alone is generally not a complete mitigation strategy. It may support a system, but the main goal is to control the pressure beneath the slab and redirect the soil gas.
System design varies with the foundation, slab, crawl spaces, additions, sump configuration, and layout of the house. For that reason, compare written proposals instead of shopping only by the lowest price. Ask what is included, how the pipe will be routed, where the fan and discharge will be located, whether electrical work is included, what warranties apply, and who performs the confirmation test.
How to Check an Existing Radon System
Many Omaha homes already have a mitigation system. That is generally a positive sign because the issue was identified and addressed. However, the presence of a white PVC pipe does not prove the system is active or effective.
During a home tour or inspection, look for:
- A fan that appears to be running
- A readable system monitor, often a small U-shaped pressure gauge
- A sealed sump cover where the sump is part of the system
- Intact piping and fittings
- A label identifying the system or installer
- A recent radon test showing the current level
The pressure gauge does not measure radon. It indicates whether the fan is creating pressure in the system. Only a radon test tells you the indoor radon concentration.
Fans do not last forever, and changes to the house can affect system performance. Retest after major foundation work, basement remodeling, additions, or significant changes to heating and ventilation. The EPA also recommends retesting when your living pattern changes and you begin using a lower level more frequently.
What About Newly Built Omaha Homes?
New construction is not automatically radon-free. Nebraska has standards for radon-resistant new construction in applicable residential projects, but features and requirements can vary with the project and circumstances. Ask the builder exactly what was installed.
Common radon-resistant features can include a gas-permeable layer beneath the slab, plastic sheeting, sealed openings, and a vent pipe that creates a passive route from below the foundation to above the roof. Some systems are built so a fan can be added if testing shows that active mitigation is needed.
Even when a passive system is present, the home should still be tested after construction and occupancy. A pipe labeled for radon is not the same thing as a confirmed low result.
If you are comparing a new subdivision with an established neighborhood, our new construction versus historic homes guide explains other differences involving maintenance, inspections, location, and ongoing costs.
Radon Questions for Omaha Renters
Renters should not assume radon is only a homeowner concern. It matters most in units that are below grade, at ground level, or close to the ground. A basement apartment, garden-level unit, townhome, or rental house deserves particular attention.
Before signing a lease, ask:
- Has the unit or building been tested for radon?
- Can management provide the date, location, and result of the test?
- Is there a mitigation system, and how is it monitored and maintained?
- Who should be contacted if the system alarm or pressure indicator changes?
- Will the owner approve a test if no recent result is available?
Get permission before placing a device in a shared or managed space, and do not alter a building system yourself. If you are comparing rentals, add radon to the broader list of questions in our guide to renting an apartment in Omaha.
Common Radon Misconceptions
“The House Is New, So It Cannot Have Radon”
New homes can test high. Modern construction may reduce uncontrolled air leakage, but it does not eliminate the natural source in the soil. Test the finished home.
“My Neighbor Tested Low, So My House Is Fine”
Radon levels can vary between neighboring homes because foundations, soil pathways, drainage, ventilation, and construction details differ.
“We Do Not Use the Basement, So Radon Does Not Matter”
Radon enters at the lowest part of the structure but can move into upper floors. The amount usually decreases with height, yet an unused basement does not make testing unnecessary.
“A Sump Pump Removes Radon”
A standard sump pump manages water, not radon. A sump pit may be incorporated into a professionally designed mitigation system, but that requires an appropriate sealed cover, piping, fan, and testing. Learn more about local drainage equipment in our basement and sump pump overview.
“Opening the Windows Fixes the Problem”
Opening windows can temporarily change a reading, but it is not a dependable year-round solution. Omaha homes need to remain comfortable through hot summers, freezing winters, smoke events, and storms. A mitigation system is designed to reduce radon continuously without relying on open windows.
A Practical Radon Checklist for New Omaha Residents
- Ask for prior records. Request past radon results, mitigation paperwork, warranties, and post-installation tests.
- Test the actual home. Do not rely on a neighborhood average or the appearance of the foundation.
- Use the correct location. Test the lowest level that is regularly occupied or suitable for occupancy.
- Protect the testing conditions. Follow the device instructions and closed-house requirements.
- Respond to the number. At 4.0 pCi/L or higher, the EPA recommends mitigation. Consider reducing levels between 2.0 and 4.0 pCi/L as well.
- Hire qualified help. Nebraska DHHS publishes lists of licensed radon measurement and mitigation businesses.
- Confirm the fix. Complete a post-mitigation test instead of assuming the new equipment solved the problem.
- Retest later. Retest after significant changes to the home or the way you use its lower level, and periodically even after a low result.
Official Radon Resources
The Nebraska Department of Health and Human Services Radon Program provides state data, test-kit information, radon-resistant construction resources, and current lists of licensed measurement and mitigation businesses.
The EPA’s Home Buyer’s and Seller’s Guide to Radon explains real estate testing, result interpretation, testing conditions, and follow-up steps. The EPA also provides a concise explanation of the 4.0 pCi/L action level.
Frequently Asked Questions About Radon in Omaha
Is radon common in Omaha?
Elevated radon is common enough across Nebraska that every Omaha-area home should be tested. Statewide data shows that more than half of reported tests have been above 4.0 pCi/L, but only an address-specific test can tell you the level in a particular home.
Can a home with high radon still be a good purchase?
Yes. Elevated radon can usually be reduced with a properly designed mitigation system. Buyers should understand the test result, proposed solution, contract terms, installation details, and need for post-mitigation testing before moving forward.
Does a finished basement increase radon?
Finishing a basement does not necessarily create radon. It does make the lower level more likely to be occupied for longer periods, which makes accurate testing and mitigation more important.
Should I test if the home already has a mitigation system?
Yes. Test results confirm whether the system is keeping the indoor level down. Check the system monitor and fan, but remember that the monitor shows system pressure rather than the radon concentration in the air.
When should I retest?
Retest after major foundation work, additions, changes to the mitigation system, or changes that make the basement a more frequently occupied living area. It is also wise to retest periodically even when the previous result was below 4.0 pCi/L.
Make Radon Testing a Normal Part of Moving to Omaha
Radon can sound alarming when you first encounter it during an Omaha home search. The useful way to look at it is much simpler: Nebraska has a known radon concern, testing gives you the information you need, and mitigation provides a practical way to reduce elevated levels.
Add radon testing to your inspection plan, keep copies of the results, and learn how any existing system works. That small amount of preparation can help you enjoy your basement, settle into your home, and focus on everything else that comes with building a life in Omaha.
