Commercial Testing · South Dakota
Commercial Radon
Testing in
South Dakota
Multi-point radon testing for offices, schools, daycares, apartment buildings, and commercial properties. Written reports for compliance, property management, and pre-purchase due diligence.
- Multi-point testing across large and multi-unit buildings
- Written reports suitable for compliance and management records
- Testing protocols for offices, schools, and multifamily buildings
- Serving all eastern South Dakota markets
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Call (605) 205-4384Understanding Commercial Testing
What Is Commercial Radon Testing?
Radon is a concern in commercial and institutional buildings — not just single-family homes. Any occupied ground-floor or below-grade space can accumulate radon regardless of whether the building is residential, commercial, or institutional. This includes offices, schools, daycares, retail spaces, multifamily buildings, and any structure with occupied space at or below grade level.
Commercial radon testing follows the same EPA-approved measurement methodology as residential testing, but requires multiple test points across the building footprint to characterize radon levels by location. Radon can vary significantly from room to room within the same building depending on slab penetrations, HVAC design, foundation type variations, and sub-slab soil conditions. A single measurement does not adequately characterize a large or complex building.
South Dakota's Zone 1 geology — Pierre Shale bedrock and glacial till deposits that underlie most of eastern SD — creates elevated radon potential throughout the region. Commercial properties in Sioux Falls, Brookings, Mitchell, Watertown, and Yankton are all within this elevated-risk zone, and any occupied below-grade or ground-floor space warrants testing regardless of building age or construction type.
Most of South Dakota — EPA's highest potential for elevated radon
EPA-recommended action level for occupied spaces of all building types
Commercial buildings require more than one test device for complete coverage
Who Needs Commercial Testing
- Building owners and property managers of commercial spaces
- School and daycare administrators concerned about occupant exposure
- Apartment and multifamily property owners
- Commercial real estate buyers doing pre-purchase due diligence
- Landlords with below-grade or ground-floor tenant spaces
What's Included
- Pre-test site assessment and test point placement plan
- Multi-point charcoal canister testing per EPA commercial protocol
- All devices retrieved and submitted to certified lab simultaneously
- Comprehensive written report with results mapped by location
- Recommended next steps for any areas above the EPA action level
How It Works
The Commercial Testing Process
From site assessment to mapped results — here's what to expect at every step.
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Site Assessment
We review the building footprint, occupied lower levels, HVAC layout, and foundation type to develop a test point placement plan scaled to your building's size and complexity.
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Multi-Point Testing
Test devices placed at all designated locations simultaneously for consistent measurement conditions. Testing period is typically 48–96 hours under standard closed-building conditions.
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Lab Analysis
All devices retrieved and submitted to a certified laboratory together. Results are cross-referenced by test location for accurate building-wide characterization.
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Comprehensive Report
Full written report includes results for each test point, location references, and recommended next steps for any areas at or above the EPA action level.
Pricing Guide
Commercial Radon Testing Cost in South Dakota
Most commercial tests fall within the ranges below. All estimates are free. Pricing depends on building size and number of test points required.
1–3 test points
Small offices, retail spaces, or light commercial buildings. Building assessment, 1–3 test devices, lab analysis, written report by location.
- Building assessment
- 1–3 test devices
- Lab analysis
- Written report by location
- Recommended next steps
4–8 test points
Multi-room offices, small apartment buildings, schools, or other mid-size commercial properties. Full placement plan and mapped results report.
- Building assessment & placement plan
- 4–8 test devices
- Lab analysis
- Report mapped by location
- Priority scheduling
9+ test points — quoted individually
Large apartment buildings, schools, warehouse/office combos, or any building requiring 9 or more test points. Custom scope and quote.
- Full building assessment
- 9+ test devices
- Coordinated lab submission
- Comprehensive mapped report
- Custom next-step plan
Protect Your Occupants
Commercial Properties Have Radon Risk Too.
Multi-point testing with written reports for compliance, property management, and due diligence records. Free estimates for all commercial building sizes.
Why Us
Why Choose Sioux Falls Radon Solutions?
What commercial clients get on every testing engagement — no shortcuts, no guesswork.
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Fast Turnaround
Most commercial tests are complete with written results within 5–7 business days of initial contact. Rush processing available for pre-purchase due diligence with tight timelines.
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Compliance-Ready Reports
Every commercial report is written in plain language, mapped by test location, and formatted for property management records, compliance documentation, or disclosure packages.
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Local South Dakota Focus
We know SD's Zone 1 geology and how radon behaves in eastern South Dakota's building stock — from downtown Sioux Falls offices to Brookings apartment buildings to Mitchell commercial spaces.
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Transparent Process
Before testing begins, you receive a test point placement plan with the number of devices, their locations, and the rationale. No surprises in scope or cost after the assessment.
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Real Estate Ready
Commercial testing reports formatted for pre-purchase due diligence, lender requirements, or buyer/seller disclosure in commercial real estate transactions.
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No Guesswork
If any area tests high, the report tells you exactly which zones are affected and what the next steps are. Zone-by-zone results mean targeted remediation — not building-wide assumptions.
Service Areas
Commercial Radon Testing by City
We test commercial buildings, schools, and multifamily properties across eastern South Dakota. Select your city for multi-point testing and compliance reports.
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
Commercial Radon Testing FAQs
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There is no state law in South Dakota mandating radon testing for commercial buildings. However, the EPA and OSHA both recommend testing for any occupied ground-floor or below-grade commercial space. Some lenders, insurers, and commercial real estate purchase agreements now include radon testing requirements. Schools and daycares face increased scrutiny given the vulnerability of their occupants.
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The core measurement methodology is the same — EPA-approved charcoal canister tests. The difference is scale and complexity. Commercial buildings require multiple test points across the footprint to characterize radon levels by location, since radon can vary significantly from room to room depending on slab penetrations, HVAC design, and sub-slab conditions. Commercial reports document results by location, not just a single number.
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The EPA recommends at least one test point per 2,000 square feet of lowest occupied floor area, with at least one point per room in buildings under 2,000 sq ft. Complex buildings with multiple foundation types, multiple floors, or separate mechanical zones may need more. We assess your building and provide a placement plan with the recommended number and location of test devices before any testing begins.
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Property owners and landlords are generally responsible for maintaining safe indoor environments in rented commercial and residential spaces. While South Dakota has no specific law assigning radon testing liability, building owners who rent occupied ground-floor or below-grade spaces have a practical interest in knowing and managing radon levels. Documentation of testing and results can also be valuable in property management records.
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The EPA action level for occupied spaces — residential or commercial — is 4.0 pCi/L. For schools and high-occupancy buildings with children, EPA guidance often recommends action consideration at lower levels. We document results relative to the 4.0 pCi/L threshold and note when results in the 2.0–4.0 pCi/L range warrant consideration given sensitive occupant populations.
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Yes. Schools and daycares can be tested using EPA-approved charcoal canister methodology over a 48–96 hour period. Testing is best scheduled during periods when the building is normally occupied and HVAC runs on its standard schedule — results during closed periods may not reflect typical occupant exposure. We coordinate scheduling to minimize disruption to operations.
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The testing period is 48–96 hours. Adding scheduling lead time and lab analysis, most commercial tests are complete with written results within 5–7 business days of initial contact. Rush processing is available for pre-purchase due diligence with tight timelines. Large buildings with many test points may take slightly longer for coordinated lab submission and report mapping.
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If any test points come back at or above 4.0 pCi/L, the written report identifies those locations and recommends next steps. In commercial buildings, mitigation may involve multiple SSD system entry points, HVAC modifications, or pressurization changes depending on building type. Not all areas will necessarily require remediation — the zone-by-zone mapped report tells you exactly which areas are affected and allows for targeted action.