Service · Roseville, MNRadon Testing in Roseville MN — Ramsey County Zone 1
Ramsey County sits in EPA Radon Zone 1 — the highest risk tier in the United States. Roseville basements built on glacial till routinely test between 4.0 and 8.0 pCi/L, well above the 4.0 pCi/L EPA action level. We run 48-hour continuous radon monitor (CRM) tests with hour-by-hour data, not the cheap charcoal kits.
What does this service include?
- 48-hour continuous radon monitor (CRM) test
- Calibrated annually; tamper-proof closed-house data
- Results in 24 hours after pickup
- Mitigation referral to licensed MN radon contractors
- Bundles with any inspection at a discount
How much does radon testing cost in Roseville?
Radon Testing pricing depends on home size and bundling. See our cost page for current ranges, or call (651) 666-5602 for an instant quote.
When should I schedule?
Most Roseville buyers schedule within 24 hours of an accepted offer. We offer same-week scheduling and same-week digital reports. Call (651) 666-5602 or use our online quote form.
Why this matters in Roseville specifically
Roseville's housing stock is heavily weighted toward 1955–1975 ramblers and split-levels. Radon Testing on a 60-year-old Roseville home looks different than on a new-build — we calibrate for the era and the local building practices. In particular, the defects we look for on a Roseville inspection are not the defects an inspector calibrated for new-construction suburbs would find. The 1955–1975 housing wave brought a specific menagerie of materials and methods: Federal Pacific panels, aluminum branch wiring, galvanized supply, cast iron drain, vermiculite top-offs, and a generation of low-slope eaves that produce ice dams on schedule every February. Knowing what to look for, where to look, and what it means is the difference between a generic checklist and a useful inspection.
The radon testing process, step by step
- 1. Pre-test setup. We confirm the closed-house conditions: windows closed 12 hours before test, HVAC running normally, no fans pulling outside air.
- 2. Deploy the monitor. Place the continuous radon monitor (CRM) on the lowest livable level, 20 inches off the floor, 12 inches from any wall, away from drafts.
- 3. 48-hour run. The CRM samples hourly. We get a hour-by-hour radon level chart, not a single average.
- 4. Pickup and analysis. We retrieve the monitor, download the data, and write the report. Hour-by-hour chart + 48-hour average + closed-house verification.
- 5. Mitigation referral. If results are ≥ 4.0 pCi/L, we refer you to a licensed MN radon mitigation contractor. We don't do the mitigation ourselves — that's an inherent conflict of interest in testing.
Equipment we use
- Sun Nuclear 1028 or Femto-Tech CRM-510 continuous radon monitor
- Calibrated annually by an accredited lab
- Tamper-resistant; logs movement and power interruption
- Closed-house verification via integrated humidity and temperature sensors
What's in your report
- 48-hour average reading in pCi/L
- Hour-by-hour chart showing diurnal variation
- Closed-house verification flags (passed/failed)
- EPA action-level context (4.0 pCi/L)
- Mitigation referral if applicable
Recent sample findings (anonymized)
5.7 pCi/L average. Unsealed sump pit identified as primary entry point. Mitigation installed by referred contractor; post-mitigation re-test came back at 1.4.
3.2 pCi/L — below action level but above 2.7 "consider mitigation" recommendation. Buyer chose to mitigate proactively. Now reads 0.8.
8.9 pCi/L average. Newer construction with passive radon stub-out that was never activated. Active mitigation brought it to 1.2.
Frequently asked questions
What is the EPA action level?
4.0 pCi/L. EPA recommends mitigation at or above that level. Some health agencies recommend considering mitigation between 2.7 and 4.0.
Why does Ramsey County test so high?
Ramsey County sits on glacial till — permeable to soil gas. The whole Twin Cities metro is EPA Zone 1, and Roseville is right in the middle of it.
How accurate are 48-hour CRM tests?
Very. Hour-by-hour data lets us spot tampering, weather effects, and HVAC anomalies. Charcoal kits give you a single number with no diagnostic context.
Should I test before or after I buy?
Test as part of the inspection contingency. If results are high, you can negotiate the cost of mitigation into the deal.
What does mitigation cost in Roseville?
$1,500–$2,500 for active sub-slab depressurization on a typical Roseville basement. We refer to licensed MN contractors.
Roseville cities and neighborhoods we serve
Radon Testing is available across all ten cities in our coverage area: Falcon Heights, Lauderdale, Little Canada, Maplewood, Shoreview, Arden Hills, North Oaks, Vadnais Heights, New Brighton, and Mounds View. See our Ramsey County hub for the full coverage map.
Related defects we find
Related services
Ready to schedule?
Call (651) 666-5602 or use the free instant quote calculator. Most inspections scheduled within 48 hours. Same-week digital report. Free re-inspection on repaired items.
Ready for a Roseville Home Inspection?
Same-week reports. Thermal imaging included. Era-specific findings for 1955–1975 ramblers, lakefront walkouts, and new-construction townhomes.