Professional radon testing inspector with equipment in Alpharetta GA home

Radon Testing in Alpharetta, GA

Alpharetta averages 4.9 pCi/L, above the EPA action level of 4.0

Professional radon testing for homes throughout Alpharetta, North Fulton County, and surrounding areas. 48-hour results with continuous radon monitors.

Get a Free Quote Call: (404) 882-7163

Why Radon Testing is Critical in Alpharetta

Alpharetta sits on the Piedmont granite formations that naturally produce uranium, which decays into radon gas. The EPA classifies North Fulton County as Zone 1, the highest risk category for radon exposure.

4.9

Avg pCi/L

Above EPA's 4.0 action level

Zone 1

EPA Classification

Highest radon risk category

1 in 5

Homes Affected

Estimated with elevated radon

Higher Than Average

Alpharetta's average radon level of 4.9 pCi/L is already above the EPA's action level of 4.0 pCi/L. That average means many individual homes test significantly higher, with readings of 6, 8, or even 10+ pCi/L. The only way to know your home's specific level is to test. Radon is colorless, odorless, and the second leading cause of lung cancer in the United States.

New to Alpharetta?

Thousands of families relocate to Alpharetta each year for the tech corridor, top-rated schools, and quality of life. If you're moving from another state, radon may not be on your radar. Here's what you need to know:

Radon exists everywhere

Even if your previous state had low radon, North Fulton County sits on granite bedrock that naturally produces radon gas. Your new Alpharetta home needs testing regardless of where you moved from.

New homes are not exempt

Alpharetta has thousands of homes built after 2000. New construction does not mean radon-free. The granite below your home doesn't care when the house was built.

Georgia has no radon disclosure law

Unlike some states, Georgia does not require sellers to disclose radon test results. If you're buying in Alpharetta, you need to request testing yourself.

Testing is fast and non-invasive

A professional test takes 48 hours with zero disruption to your routine. The monitors sit quietly in your home and require no special preparation.

Radon Testing Methods

Short-Term Testing

48-hour to 7-day tests ideal for real estate transactions and initial screening. Charcoal canisters or electret ion chambers measure average radon over the testing period.

Duration: 2-7 daysBest for: Initial screening

Long-Term Testing

90+ day tests provide the most accurate annual average reading. Alpha track detectors account for seasonal variation in North Fulton radon levels.

Duration: 90+ daysBest for: Annual average

Continuous Radon Monitors (CRM)

Electronic monitors record hourly radon readings and include tamper detection. This is our primary method for Alpharetta homes and the standard for real estate transactions.

Duration: 48+ hoursBest for: Real estate & accuracy

Testing Method Comparison

Feature	Short-Term Test	Long-Term Test	Continuous Monitor
Duration	2-7 days	90+ days	48+ hours
Best For	Initial screening	Annual average	Real estate & accuracy
Results Type	Period average	Yearly average	Hourly readings
Tamper Detection	No	No	Yes
Real Estate Accepted	Sometimes	No (too slow)	Yes (preferred)
Our Recommendation	General screening	Post-mitigation verification	Primary method

Our Alpharetta Testing Process

Schedule

Call or book online. We typically schedule within 1-3 business days for Alpharetta homes.

Placement

Technician places continuous monitors in the lowest livable level. Most Alpharetta homes are tested on the main floor or finished basement.

Testing

Monitors collect hourly data for a minimum of 48 hours under closed-home conditions. You can stay in your home during testing.

Results

Receive a detailed report with hourly readings, average radon level, and recommended next steps within 48 hours of pickup.

Testing by Foundation Type

Alpharetta homes have different foundation types depending on when and where they were built. Monitor placement varies by foundation:

Slab-on-Grade

Most common in post-2000 builds

Monitors are placed on the main floor, the lowest livable level. Common in Windward, Webb Bridge, and most newer Alpharetta subdivisions.

Crawl Space

Older homes and custom builds

Monitors go on the first floor above the crawl space. Found in older Crabapple homes, Downtown Alpharetta, and some Milton border properties.

Basement

Some luxury and custom homes

Monitors are placed in the basement if it's used as living space. Some larger estate homes near Milton have full or partial basements.

Alpharetta Areas We Serve

We provide professional radon testing throughout Alpharetta and surrounding North Fulton areas:

WindwardNewer slab construction, moderate risk

CrabappleMix of older and custom builds

Webb BridgeSubdivision homes, slab foundations

CogburnEstablished neighborhood area

North PointMixed residential and commercial

Haynes BridgeResidential corridor

Downtown AlpharettaOlder homes near city center

Milton BorderLarger lots, custom builds

Avalon AreaNewer townhomes and mixed-use

DevoreEstablished residential community

Kimball BridgeGrowing residential area

Old MiltonHistoric area, varied foundations

Alpharetta Radon Testing FAQs

How much does radon testing cost in Alpharetta?

Professional radon testing in Alpharetta typically costs $150 to $200 for a 48-hour continuous monitor test. This includes placement, pickup, and a detailed results report. Contact us for current pricing.

What is the average radon level in Alpharetta?

The average radon level in Alpharetta is approximately 4.9 pCi/L, which is above the EPA action level of 4.0 pCi/L. This means Alpharetta homes have a higher-than-average probability of elevated radon, and testing is strongly recommended.

Should I test my new construction home in Alpharetta?

Yes. The EPA recommends testing every home regardless of age. Alpharetta's granite bedrock produces radon whether your home was built this year or 30 years ago. Many buyers in Windward and other newer subdivisions assume new construction is safe, but testing consistently shows otherwise.

How long does radon testing take?

Short-term tests require a minimum of 48 hours under closed-home conditions. We use continuous radon monitors that record hourly readings, giving you both the average level and the pattern of radon fluctuation in your home. Results are typically delivered within 48 hours of monitor pickup.

When is the best time to test for radon in Alpharetta?

You can test any time of year, but winter testing in Alpharetta often shows higher readings because homes are sealed tighter and the temperature differential between indoors and outdoors increases soil gas draw. The EPA recommends retesting every 2 years regardless of season.

Do I need to leave my home during testing?

No. You can stay in your home during the entire testing period. The main requirement is maintaining closed-home conditions: keep windows and exterior doors closed except for normal entry and exit. Avoid operating fireplaces, whole-house fans, or window fans during the test.

Are DIY radon test kits accurate enough for Alpharetta homes?

DIY kits can provide a general indication but have limitations. They lack tamper detection, provide only a single average (no hourly data), and results can take weeks from mail-in labs. For real estate transactions, most buyers and lenders require professional testing. Given Alpharetta's elevated average, professional testing gives you the most reliable data to make decisions.

What happens if my Alpharetta home tests high?

If your test shows radon at or above 4.0 pCi/L, the EPA recommends mitigation. A radon mitigation system for a typical Alpharetta home costs $1,000 to $2,200 depending on foundation type and is installed in a single day. We can review your results and discuss your specific options.