Radon Testing · South Dakota
Radon Testing
Services in
South Dakota
Professional radon testing using EPA-approved methodology. Know your home's radon level with written results delivered within 24 hours of device retrieval.
- Short-term and long-term test options available
- Written report within 24 hours of device retrieval
- EPA-approved testing methodology
- Results explained in plain language — not just numbers
We'll respond within 1 business hour.
Estimate Request Received!
We'll be in touch within 1 business hour with next steps.
Call (605) 205-4384Understanding Radon Testing
What Is Radon Testing?
Radon testing measures the concentration of radon gas in your home — the only way to know whether your indoor levels require attention. Radon is colorless and odorless; it cannot be detected by sight, smell, or any physical symptom until long-term exposure has accumulated. A test is the only diagnostic tool available.
Two primary methods exist: short-term charcoal canister tests (48–96 hours) give a snapshot of radon levels during the test period and are best for real estate transactions or initial screening. Long-term alpha track tests (90+ days) measure radon across a full seasonal cycle, providing a more accurate annual average that accounts for seasonal radon variation driven by South Dakota's cold winters and soil pressure changes.
South Dakota's geology — Pierre Shale bedrock and glacial till deposits — concentrates uranium decay products in the soil beneath eastern SD homes. Combined with months of sealed, tightly insulated living conditions in winter, radon can accumulate to levels well above the EPA action level of 4.0 pCi/L. The only way to know your level is to measure it.
Most of South Dakota — EPA's highest radon potential designation
EPA action level — testing is the only way to know if your home exceeds it
Estimated share of South Dakota homes with radon above the EPA action level
Who Should Test
- Homeowners who have never tested their home
- Home buyers as part of the inspection process
- Home sellers who want to test before listing
- Homes where last test was more than two years ago
- Homes after major foundation or HVAC changes
What's Included
- EPA-approved short-term or long-term test device
- Professional placement in the lowest livable area
- Closed-building conditions guidance
- Certified laboratory analysis
- Written report with plain-language explanation and next steps
How It Works
The Testing Process
From scheduling to written results — here's what to expect at every step.
-
Test Placement
Device placed in the lowest livable area — basement or first floor — per EPA protocol. Short-term tests require closed-building conditions during the test period.
-
Test Period
Short-term: 48–96 hours in closed conditions. Long-term: 90+ days for a seasonal annual average. The device runs unattended — no disruption to your routine.
-
Lab Analysis
Test device retrieved and sent to a certified laboratory. Rush processing available for real estate timelines and urgent scheduling needs.
-
Written Report
Results delivered within 24 hours of lab processing, with plain-language explanation, EPA context, and recommended next steps if action is needed.
Pricing Guide
Radon Testing Cost in South Dakota
Most tests fall within the ranges below. All estimates are free. Pricing varies by test type, turnaround requirements, and property type.
Short-term test
48–96 hour charcoal canister test. Professional placement in the lowest livable area, lab analysis, and written results report.
- Charcoal canister test
- Professional placement
- Lab analysis
- Written results report
With consultation
Standard test with professional placement, detailed written report, next-step recommendations, and real estate-ready formatting.
- All Standard inclusions
- Detailed written report
- Next-step consultation
- Transaction-ready format
- Rush options available
Alpha track, 90+ days
Alpha track detector for the most accurate annual average. Ideal for new homes, follow-up after a short-term result, or year-round occupancy concerns.
- Alpha track detector
- 90-day test period
- Lab analysis
- Written annual average report
Know Your Numbers
The Only Way to Know Is to Test.
Short-term results in 48–96 hours. Written report within 24 hours of retrieval. If your levels require action, we walk you through every next step.
Why Us
Why Choose Sioux Falls Radon Solutions?
What you get with every radon test — no guesswork, no fine print.
-
24-Hour Report Turnaround
Written results within 24 hours of device retrieval. No waiting days for lab processing — we build fast turnaround into every test so you have answers quickly.
-
Clear Written Reports
Every report is written in plain language. You'll know what the number means, how it compares to the EPA action level, and what your options are — not just a raw measurement.
-
Local South Dakota Focus
We understand SD's geology — Pierre Shale, glacial till, tight winter construction. Local context shapes how we interpret results and explain radon risk to homeowners.
-
Transparent Process
Before the device is placed, you know exactly where it goes, how long it stays, what the test measures, and when you'll have results. No surprises.
-
Real Estate Ready
Reports are formatted for buyer/seller disclosure, inspection contingencies, and real estate agent use. Fast turnaround designed to fit within standard inspection windows.
-
No Guesswork
If your test comes back high, we walk you through every mitigation option available. Testing is just the first step — we're with you through whatever comes next.
Service Areas
Radon Testing by City
We test homes and properties across eastern South Dakota. Select your city for local scheduling, pricing, and area-specific radon risk information.
Sioux Falls
EPA Zone 1 — Minnehaha & Lincoln County. Highest radon risk in South Dakota.
Brookings
EPA Zone 2 — Brookings County. Individual buildings frequently test above 4.0 pCi/L.
Mitchell
EPA Zone 1 — Davison County. James River valley geology elevates radon levels.
Watertown
EPA Zone 1 — Codington County. Zone 1 risk across Codington County.
Yankton
EPA Zone 1 — Yankton County. Missouri River bluffs area — consistent Zone 1 readings.
Common Questions
Radon Testing FAQs
-
Short-term charcoal canister tests are accurate when closed-building conditions are maintained throughout the test period — windows and exterior doors kept shut except for normal entry and exit. Under proper conditions, short-term tests meet EPA protocol standards for both initial screening and real estate transaction use.
-
Short-term tests (48–96 hours) use charcoal canisters and are best for time-sensitive situations like real estate transactions or initial screening. Long-term tests (90+ days) use alpha track detectors and measure radon across a full seasonal cycle, providing a more accurate annual average that accounts for radon variation driven by weather, soil pressure, and heating season. If time allows, a long-term test gives the most complete picture.
-
Someone needs to be available to allow access at placement and retrieval. The test itself runs unattended during the test period — you simply maintain closed-building conditions and avoid disturbing the device. Most homeowners find the process straightforward and minimally disruptive.
-
The EPA recommends mitigation when indoor radon levels are at or above 4.0 pCi/L. Your written report includes the result, what the number means in the context of EPA thresholds, and recommended next steps. We can discuss mitigation options directly — most sub-slab depressurization systems are installed in a single day.
-
The most important step is maintaining closed-building conditions throughout the test period: keep windows and exterior doors closed, avoid high-airflow activities like repeatedly opening the garage. Air conditioning is permitted as long as it recirculates indoor air. No other special preparation is needed — the device handles measurement on its own.
-
The EPA recommends retesting every two years, or after any major change that could affect radon entry — a new addition, foundation sealing, major HVAC changes, or if you've moved into a previously untested home. Homes with mitigation systems should also retest periodically to confirm the system is still performing effectively.
-
DIY charcoal kits use the same EPA-approved methodology as professional tests. The practical differences are: professional placement ensures the device is positioned correctly in the lowest livable area per protocol; a professional written report is formatted for real estate transactions, insurance, or disclosure; and you get an expert interpretation of results with specific next-step guidance included.
-
The written report includes: the measured radon level in pCi/L, the test type and duration, the date range of the test, the certified laboratory that analyzed the device, and recommended next steps based on the result. Reports are formatted clearly for homeowner records and can be shared with real estate agents or buyers as part of a disclosure package.