Radon Mitigation in Davenport, IA

Why radon is a serious problem in Davenport

Local measurements and geology — not national boilerplate.

Zone 1EPA radon zone — Scott County

7.6 pCi/LIowa average indoor level

71.6%of Iowa homes above the action level

4.0 pCi/LEPA action level

Iowa is the worst radon state in the United States, and it is not a close call. Every one of Iowa's 99 counties — Scott County included — is classified by the EPA as Radon Zone 1, the highest category, meaning the predicted average indoor screening level exceeds 4.0 pCi/L. The Iowa Radon Survey found 71.6% of Iowa homes above the EPA action level of 4.0 pCi/L, the largest share of any state, against a statewide average of roughly 7.6 pCi/L — nearly double the level at which the EPA says to act. The cause is geology, not construction: glacial till deposited over uranium-bearing bedrock releases radon that migrates up through soil and enters homes through foundation cracks, sump pits, and slab penetrations. A newer Davenport home is not automatically safer — a tighter building envelope exchanges less air, which can concentrate radon instead of diluting it.

Sources: EPA Map of Radon Zones; Iowa HHS Radiological Health (Iowa Radon Survey); EPA (action level)

Share of homes testing above the EPA action level of 4.0 pCi/L. Sources: EPA (national, ~1 in 15 homes); state radon surveys.

What a radon mitigation system actually does

The standard fix for a Davenport home is active sub-slab depressurization. A suction point is cut through the basement slab, a sealed PVC pipe is run from beneath the foundation up and out of the house, and an inline fan runs continuously to pull soil gas out from under the slab and vent it above the roofline — before it can enter the living space. Sump pits are sealed and vented into the same system, and open foundation cracks are sealed so the fan pulls from the soil rather than from the room.

Scott County sits on glacial till laid over uranium-bearing bedrock along the Mississippi — the same deposit that makes eastern Iowa one of the most radon-prone corridors in the country. A correctly designed system usually brings levels well below 4.0 pCi/L, and often under 2.0. It runs on roughly the electricity of a low-wattage light bulb and needs almost no maintenance beyond watching the manometer gauge on the pipe. Any reputable installer performs a post-mitigation test after the system has run — a system that has not been re-tested has not been proven to work.

1Vents above the roofline, away from windows and doors
2Continuous inline fan — runs 24/7, about the draw of a lightbulb
3Sealed suction point cut through the slab
4Gas-permeable aggregate — the suction field under the foundation

Active sub-slab depressurization: a fan pulls soil gas from beneath the slab and vents it above the roofline, before it can enter the Davenport home.

Active sub-slab depressurization — the EPA-recognized method for slab and basement homes
Sump pit sealing and crawlspace membrane systems where the foundation calls for it
Post-installation retest to confirm the level actually dropped
Systems vented above the roofline and installed to state credentialing standards

Explore the data

Every page cites its sources — start where your question is.

Testing71.6%of Iowa homes above 4.0 pCi/LView Repair5–10 yrstypical radon fan service lifeView New BuildsZone 1EPA radon zone — Scott CountyView Cost Guide$800 – $2,500Active sub-slab system, installedView County Data99 / 99Iowa counties classified EPA Zone 1View Contractors4credentialed companies based in the Davenport areaView

How it works

Tell us your situation

Call or send the form — test result in hand, or not yet tested.

Talk to a local pro

You're connected with a licensed IA contractor who works Scott County.

Get a written quote

Scope and price up front, including the post-work retest.

Verify it worked

A retest after the system runs proves the level actually came down.

Licensed contractors onlyState-credentialed pros, verifiable by certification number.

Cited public dataEPA and state health department sources on every page.

Retest includedNo system is done until a retest proves the number dropped.

Davenport Radon Mitigation — FAQ

How much does radon mitigation cost in Davenport?

Most single-family homes in the Davenport and Quad Cities area fall in the $800–$2,500 range for a standard active sub-slab system. Price moves with foundation type, how many suction points are needed, and how the pipe has to be routed. Homes with multiple foundation sections, or crawlspaces needing a sealed membrane, sit at the higher end. Get the quote in writing with the post-install retest included.

What radon level requires mitigation?

The EPA action level is 4.0 pCi/L — at or above that, the EPA recommends fixing the home. The EPA also suggests considering mitigation between 2.0 and 3.9 pCi/L, because no level of radon is considered risk-free.

How long does the installation take?

Most Davenport installations are finished in a single day — typically three to five hours for a standard basement system. The fan can run immediately, and levels usually drop within 24 hours. The confirmation test is normally run at least 24 hours after the system starts.

Does a radon system make my house harder to sell?

The opposite. Radon testing is routine in Quad Cities real estate transactions, so a documented mitigation system removes a negotiation point rather than creating one.

Get a free radon mitigation quote in Davenport

Serving Davenport and the surrounding Scott County area. No obligation — most quotes back same day.