If you’ve ever bought a home, sold one, or even casually browsed real estate listings, chances are you’ve heard about radon. It’s invisible. It’s odorless. And it can quietly build up inside your home without you ever noticing. That’s why radon testing in Maryland has become such an important conversation for homeowners who want peace of mind.

But here’s where things get confusing: short-term tests, long-term tests—what’s the difference? Which one do you actually need? And how accurate are they, really? Let’s break it all down in plain English so you can make a confident decision for your home and your family.

Local professionals, including Home Inspectors in Howard County, often get these questions from clients who aren’t sure where to start. So think of this guide as your crash course in Radon Testing 101.

What Is Radon and Why Should You Care?

Radon is a naturally occurring radioactive gas that forms when uranium breaks down in soil and rock. It seeps up from the ground and can enter homes through cracks in foundations, gaps around pipes, sump pits, and even tiny openings you’d never think twice about.

Outdoors, radon disperses harmlessly. Indoors? That’s a different story. When it gets trapped, levels can rise to the point where long-term exposure increases your risk of lung cancer.

Here’s the kicker: you won’t smell it, see it, or taste it. The only way to know your levels is to test.

That’s one reason radon testing in Maryland is especially relevant. Our region’s geology can contribute to elevated radon levels, and many homes—old and new alike—can be affected. Even two houses next door to each other can have dramatically different readings.

Why Radon Testing Matters in Maryland

You might be thinking, “My house is newer. I’m probably fine.” Not necessarily.

New construction can be just as susceptible as older homes. In fact, tighter, energy-efficient homes can sometimes trap radon more effectively. That’s why radon testing in Maryland is recommended regardless of your home’s age, size, or style.

Professionals like Home Inspectors in Howard County regularly recommend testing during real estate transactions. It’s become a standard part of many home inspections. Buyers want assurance. Sellers want transparency. Everyone wants to avoid surprises.

And honestly? Testing is simple and relatively inexpensive compared to the potential health risks.

Short-Term Radon Tests: Fast Answers When You Need Them

Short-term radon tests typically last between 2 and 7 days. They’re often used during real estate transactions when time is limited and decisions need to be made quickly.

The test device is placed in the lowest livable area of the home—usually a basement—and left undisturbed. Windows stay closed. Exterior doors are kept shut as much as possible. After the testing period, the device is sent to a lab for analysis.

Within a few days, you’ll get your results.

When Are Short-Term Tests Best?

Short-term tests are ideal when:

• You’re buying or selling a home

• You need quick results

• You want an initial snapshot of radon levels

In competitive markets, radon testing in Maryland often needs to happen quickly to keep a contract on track. A short-term test provides that rapid feedback.

Pros and Cons of Short-Term Testing

Pros:

• Fast results

• Convenient for real estate timelines

• Affordable

Cons:

• Results can fluctuate due to weather or short-term conditions

• Less reflective of year-round averages

Think of it like checking the weather on a single day. It tells you something—but not the whole story.

Long-Term Radon Tests: The Big Picture

What Is a Long-Term Test?

Long-term radon tests measure levels over 90 days to a year. Because radon levels can vary from season to season, these tests provide a more accurate annual average.

They’re not typically used in fast-moving home sales, but they’re incredibly valuable for homeowners who plan to stay put and want a deeper understanding of their home’s air quality.

When Should You Choose Long-Term Testing?

Long-term testing makes sense if:

• You’re not in a rush

• You want the most accurate average reading

• You’ve had borderline short-term results

If you tested during a home purchase and levels were low but close to the EPA action level, following up with a long-term test is a smart move. That’s another reason radon testing in Maryland isn’t a one-and-done conversation—it’s something you may revisit over time.

Pros and Cons of Long-Term Testing

Pros:

• More accurate yearly average

• Less influenced by short-term weather changes

• Ideal for long-term homeowners

Cons:

• Takes months to complete

• Not practical for tight real estate deadlines

On the flip side, if patience isn’t an issue, long-term testing gives you data you can really rely on.

Short-Term vs. Long-Term: Which One Should You Choose?

Here’s a simple way to look at it:

• Buying or selling? Go short-term.

• Staying long-term? Consider long-term testing.

• Got borderline results? Follow up with long-term.

Many homeowners start with a short-term test and then move to long-term monitoring if needed. In areas where radon testing in Maryland is common practice, that two-step approach isn’t unusual.

When in doubt, consult experienced Home Inspectors in Howard County. They can help you decide based on your timeline, property type, and goals.

What Happens If Radon Levels Are High?

Let’s say your results come back above 4.0 pCi/L—the EPA’s recommended action level. Now what?

First, don’t panic.

High radon levels are fixable. Mitigation systems are highly effective and can dramatically reduce indoor radon concentrations.

A typical mitigation system involves installing a vent pipe system and fan that pulls radon from beneath the home and vents it safely outside. Once installed, a follow-up test confirms the system is working.

Home Inspectors in Howard County often coordinate with licensed radon mitigation specialists to ensure proper installation and post-mitigation testing. It’s a straightforward process—and a worthwhile investment in your home’s safety.

Common Myths About Radon Testing

Let’s clear up a few misconceptions.

Myth #1: If my neighbor’s house is fine, mine is too.
Not true. Radon levels vary from house to house. That’s why radon testing in Maryland is recommended for every individual property.

Myth #2: I only need to test once.
Also false. Renovations, foundation changes, or even natural settling can alter radon levels over time.

Myth #3: New homes don’t have radon.
Again, incorrect. New builds can absolutely have elevated radon levels.

Testing isn’t about fear—it’s about data. And data gives you control.

Radon Testing During Real Estate Transactions

If you’re in the middle of buying a home, radon testing in Maryland is often written directly into the contract. Buyers may request it as part of their inspection contingency.

Here’s how it usually works:

1. The test is scheduled shortly after the home inspection.

2. Closed-house conditions are maintained.

3. Results are shared with both parties.

4. If levels are high, negotiations may include mitigation installation.

Experienced Home Inspectors in Howard County understand the timing pressures of real estate deals. They coordinate testing efficiently to keep transactions moving smoothly.

For sellers, pre-listing radon testing can even be a strategic move. Knowing your numbers ahead of time eliminates last-minute surprises.

Practical Tips for Accurate Radon Testing

Whether you choose short-term or long-term testing, accuracy matters. Here’s how to get reliable results:

• Keep windows closed during short-term tests.

• Avoid placing the test in kitchens, bathrooms, or laundry rooms.

• Don’t disturb the device once it’s set.

• Test during cooler months for conservative readings.

If you’re unsure about placement or protocol, radon testing in Maryland is best handled by trained professionals who understand local conditions and standards.

Working with knowledgeable Home Inspectors in Howard County ensures that testing follows EPA guidelines and produces dependable results.

How Often Should You Test?

The EPA recommends testing every two years, or sooner if:

• You’ve installed a mitigation system

• You’ve done major renovations

• You’ve never tested before

Even if previous results were low, periodic radon testing in Maryland is a smart preventative step. Think of it like changing your smoke detector batteries—you hope nothing’s wrong, but you check anyway.

Final Thoughts: Knowledge Is Peace of Mind

Radon may be invisible, but your response to it doesn’t have to be uncertain.

Short-term tests give you quick answers. Long-term tests give you deeper insight. Both have their place, and both serve a valuable purpose depending on your situation.

At the end of the day, radon testing in Maryland isn’t just another box to check during a home purchase. It’s about protecting your health and making informed decisions. Whether you’re settling into your forever home or preparing to sell, understanding your radon levels empowers you.

And if you’re unsure where to start, trusted Home Inspectors in Howard County can guide you through the process—from initial testing to mitigation recommendations if needed.

Because when it comes to the air you breathe every day, guessing just isn’t good enough.