Radon Testing in Massachusetts 48-hour continuous-monitor radon testing in the Pioneer Valley. Add to any home inspection or schedule standalone.

Radon is a colorless, odorless radioactive gas that occurs naturally in the soil and seeps into homes through foundations, slab cracks, and sump pits. The EPA classifies radon as the leading cause of lung cancer among non-smokers, and Massachusetts has documented elevated radon levels across the Pioneer Valley.

For real-estate transactions in Western Mass, radon testing is one of the highest-value add-ons available. It’s inexpensive, takes 48 hours, and surfaces a hazard that’s otherwise completely invisible.

Why Radon Matters Specifically in the Pioneer Valley

The Pioneer Valley sits on a geology that produces above-average radon emissions — specifically the granite and pegmatite formations that define much of Franklin and Hampshire Counties. Massachusetts DPH data shows elevated zip codes throughout our service area, with particularly high concentrations in:

• Greenfield and the surrounding Franklin County hill towns
• Holyoke and the Holyoke Range / Mount Tom corridor
• Sunderland, Leverett, and the Mount Toby area
• The Pelham Hills and parts of east Amherst

Even within these zones, levels vary house-to-house — the only way to know your home is to test it.

How We Test

A professional continuous-monitoring device is placed on the lowest livable level of the home for a minimum of 48 hours, meeting EPA and state protocol for real-estate transactions.professional continuous-monitoring device

1. The monitor is set up at the start of the inspection (or in a separate visit).
2. Closed-house conditions are maintained for at least 12 hours before and during the test.
3. The monitor records hourly readings — picking up not just the average but the variability.
4. After at least 48 hours, the device is retrieved and results are typically emailed within 24 hours.

The continuous-monitor approach is the standard for real-estate transactions in Massachusetts because the hourly data makes test tampering (e.g., opening windows mid-test) easy to detect.

What the Results Mean

Schedule

Schedule online — radon testing is most often booked alongside a buyer home inspection, pre-listing inspection, or new construction inspection, but standalone visits are also available.