Fairfax has the metro’s highest radon readings. We handle them every week.

Fairfax (pop 2,229; ZIP 52228): southwest metro edge, mid-century homes with unfinished basements. Highest radon readings in the metro — typical 8–14 pCi/L.

Why Fairfax reads so high

Fairfax sits on the southwest edge of the Cedar Rapids metro, on a soil profile that’s the most radon-prone in Linn County. Two factors stack:

1. Soil & geology. Glacial till in this part of the county is particularly uranium-rich. Underlying bedrock is closer to the surface than in central Cedar Rapids, which reduces the soil column’s ability to dissipate radon laterally.
2. Housing era. Fairfax’s housing stock is heavily mid-century — 1950s to 1970s — built before any radon-resistant construction standards existed. Block-wall basements, unsealed slab-to-foundation joints, and uninsulated rim joists all create radon entry pathways.

The combined result: most initial short-term tests in Fairfax come back at 8–14 pCi/L, two to four times the EPA action level. The good news is that mitigation is just as effective here as anywhere else — a properly designed SSD system reliably drops a 12 pCi/L Fairfax home to under 1.5 pCi/L. We do this work every week.

What a Fairfax mitigation install looks like

System sizing

Higher initial radon means we need to pull more sub-slab vacuum than on an average home. We typically spec a larger fan (RadonAway RP260 or equivalent) and may install a slightly larger PVC riser (4″ vs. 3″) to handle the higher flow. A correctly sized fan is the difference between a system that drops a home from 12 to 0.8 and one that drops it from 12 to 4.2. Cheap mitigation outfits underspec the fan and end up at 4.2.

Block-wall sealing

Most Fairfax basements are block-wall. The hollow cores of concrete masonry units act as a chimney for radon — gas enters through the bottom course and exits through every crack in the upper wall. Standard slab-only mitigation in a Fairfax block-wall home will not bring it under 4 pCi/L. We either depressurize the block wall directly (drilling small holes near the top course and connecting them into the suction system) or seal the rim joist comprehensively with closed-cell foam plus polyurethane caulk. Both approaches work; the choice depends on basement layout.

Suction-point count

Larger Fairfax homes (2,000+ sq ft slabs) often need two suction points to achieve uniform sub-slab vacuum. We verify with pressure-field extension testing during install. If a single suction point can’t pull adequate vacuum across the slab, we add a second — included in our quoted price for these jobs, not an extra-charge surprise.

Pricing

Fairfax installs tend to scope larger than the metro average because of the bigger fan, block-wall sealing, and frequent two-suction-point requirement. We quote the full scope up front rather than surprise a homeowner with a change order.

Test results to expect

If you’re reading this page because you just got a test back at 11 pCi/L on your Fairfax home, here’s the context: that’s normal for Fairfax. It does not mean your home is uniquely defective. It means you bought a home in the Iowa town with the highest radon profile in Linn County. The number is high enough that re-testing isn’t worth the delay — the EPA explicitly says to move directly to mitigation at any reading above 4 pCi/L, and at 11 pCi/L you’re well past that threshold.

Post-mitigation results on a properly installed SSD system in Fairfax typically come in 0.7–1.5 pCi/L — the same range as a successful install anywhere else. The starting number is higher, but the fix is the same physics.

Real estate transactions in Fairfax

Fairfax has lower transaction volume than the central metro but every Fairfax listing should be assumed to have elevated radon. Pre-listing mitigation is increasingly common because the seller-side math is straightforward: pay for mitigation now and turn it into a feature in the listing, or face an inspection-period radon contingency that probably costs a similar amount anyway plus the negotiation friction that comes with it. Our real-estate transaction package handles either path.

Scheduling in Fairfax

Fairfax is 25 minutes from our base. Quotes same day, install lead time typically 5–7 business days, faster on real-estate deadlines.

Nearby service areas

Fairfax sits on the southwest edge of the metro. Walford is just to the southwest, Ely is east, and Cedar Rapids sits to the north.