Radon Mitigation in Reading, PA

Why radon is a serious problem in Reading

Local measurements and geology — not national boilerplate.

Zone 1EPA radon zone — Berks County

2,700 pCi/Lthe 1984 Watras home, Berks County

~40%of PA homes above the action level

4.0 pCi/LEPA action level

Berks County is not just another EPA Zone 1 county — it is where America discovered radon. In December 1984, Stanley Watras, an engineer working at the Limerick nuclear plant, began setting off radiation monitors on his way into work. Investigators traced the contamination to his home in Boyertown, right here in Berks County, which measured roughly 2,700 pCi/L — hundreds of times the EPA action level of 4.0 pCi/L. That single house launched radon policy in the United States. The cause was the Reading Prong: a Precambrian uranium-bearing gneiss-and-granite belt running through Berks, Lehigh, Northampton, Bucks, Montgomery, and Chester counties. That formation has not changed. PA DEP reports roughly 40% of Pennsylvania homes tested come back above the action level, and the share is markedly higher in Reading Prong counties like Berks.

Sources: EPA Map of Radon Zones (Pennsylvania); PA DEP Radon Division; USGS/PA geology of the Reading Prong; 1984 Watras case documentation

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 Reading 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.

Berks County sits directly on the Reading Prong — a Precambrian uranium-bearing gneiss-and-granite belt that is the single most notorious radon formation in the United States. 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 Reading 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.

TestingZone 1EPA radon zone — Berks CountyView Repair5–10 yrstypical radon fan service lifeView New BuildsZone 1EPA radon zone — Berks CountyView

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 PA contractor who works Berks 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.

Reading Radon Mitigation — FAQ

How much does radon mitigation cost in Reading?

Most single-family homes in the Reading and Berks County 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 Reading 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. Pennsylvania requires DEP certification for radon testing and mitigation contractors — confirm the certification number before any work begins.

Get a free radon mitigation quote in Reading

Serving Reading and the surrounding Berks County area. No obligation — most quotes back same day.