radon manometer reading 2

https://radonsysteminspectionhub.hexaforgey.com/posts/why-a-radon-system-inspection-matters-for-your-st.-louis-home

I glanced at the radon manometer reading and saw it was hovering just above 4 pCi/L, which is the EPA action level. That means I need to seal the basement cracks and install a mitigation system before it climbs higher. These digital manometers are much better than the old charcoal test kits—they give you a real-time average so you can actually see how seasonal changes affect the radon levels.