Basements With a Sump Pit
The pit gets an airtight lid and often becomes the suction point, drawing radon out of the drain tile that rings the footing.
Radon solutions for York, PA basements
Basement Radon Mitigation for York Homes
Sump Pit Radon Sealing · Finished Basement Radon System · Stone Foundation Radon Mitigation
Your basement is where radon shows up first and builds up most, so that is where a mitigation system does its work. Our certified crew caps the sump pit with an airtight lid, then pulls suction from under the slab or straight through the perimeter drain tile. Reachable cracks and joints get sealed, and the gas goes out above the roofline. The level drops in the basement and in every room above it, and a follow-up test puts that on paper. Our own PA DEP-certified crew handles the whole job.
Free estimatePA DEP-certified mitigation firmPost-mitigation test
4.0
pCi/L EPA action level
fix homes at or above this level1 Day
Typical installation
for most York homes
PA DEP certified radon mitigation
Who you are calling
Basement Systems Built for York Foundations
Basements hold the highest radon readings in most York homes, and the reasons are structural. The slab lies flat on soil and gravel. The joint where floor meets wall is almost never airtight. A sump pit opens straight onto the drain tile ringing the house. Block and stone walls pass soil gas right through them. A basement system takes each of those weak spots and turns them into one controlled route out of the building.
How you use the space shapes the design. In an unfinished basement, the suction point and pipe go wherever the run is cleanest. In a finished one, we look for a utility room, a closet or an exterior wall that hides the system. The suction point and manometer still have to sit somewhere you can reach them.
- Airtight sump covers Clear, bolted, gasketed lids that seal the pit and still let a plumber service the pump.
- Drain tile suction Where perimeter tile exists, pulling through the sump can reach the entire foundation at once.
- Finished basement planning Pipe routed through closets, utility rooms or the exterior so drywall stays where it is.
- Crack and joint sealing Reachable slab cracks, the floor-wall joint and pipe penetrations closed with radon-rated sealant.
PA DEP data
Basement Radon in York County
- Median basement result
- 4.9 pCi/L
- Basement tests at or above 4.0
- 56.4%
- Median first-floor result
- 2.1 pCi/L
- Median sub-slab system cost, 2024 to 2026
- $1,175
York County basements test well above first floors: 56.4% of 82,215 basement tests reached 4.0 pCi/L, against 33.4% of 10,703 first-floor tests.
Source: Pennsylvania DEP, data.pa.gov. Retrieved October 21, 2026.
When to call
Signs Your Basement Needs Radon Mitigation
Radon cannot be seen or smelled, so the clues are in your test results, your system and your foundation. Note your latest radon number and when the test was taken.
(717) 275-0074 - 01
A High Basement Test Result
A reading at or above 4.0 picocuries per liter (pCi/L), or 148 becquerels per cubic meter (Bq/m³), in the basement or lowest level is the plainest signal there is. The Environmental Protection Agency (EPA) suggests weighing a system between 2.0 and 4.0 pCi/L as well.
- 02
An Open or Loose Sump Lid
An uncovered sump ties your basement air straight to the soil and the drain tile around the footing. Few paths in are easier than that one.
- 03
You Are About to Finish the Space
A new bedroom, office or family room means real hours spent in the highest-radon level of the house. Putting a system in before the walls go up is far simpler.
- 04
Cracked Block or Crumbling Stone
Open cracks, exposed block cores and failing mortar let soil gas enter through the walls, not only up through the floor.
The right method for the home
Basement Types We Mitigate in York
York basements were built across more than a century, in half a dozen styles. Each one asks for a slightly different approach from our crew.
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Poured Concrete Basements
With clean crushed stone underneath, a single sub-slab suction point can usually pull the whole basement down on one fan.
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Block Wall Basements
Hollow cores inside block walls carry radon upward. Sealing the top course or pulling suction on the wall gets added to slab suction.
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Stone and Rubble Foundations
Fieldstone walls in older city homes leak soil gas through the wall itself, so these jobs need extra sealing and a harder-pulling fan.
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Finished and Half-Finished Basements
Pipe travels through unfinished corners, closets or outside walls, with access panels left at the suction point and gauge.
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Basements With Crawl Space Additions
A sealed membrane with suction underneath ties the crawl space into the same system serving the basement.
What you get
What Our Basement Radon Service Includes
Every job includes all of the following. Nothing here is an extra added on once we are already at your home.
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Full Basement Assessment
Our certified crew inspects the slab, sump, drain tile, walls, floor-wall joint and every penetration, then runs a sub-slab communication test.
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Sealed Sump and Suction Point
The Department of Environmental Protection (DEP) requires a sealed sump cover with a radon-resistant drain where no other floor drain exists. The suction point lands where it reaches the largest share of your foundation.
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Radon Fan and Vent Pipe
A fan mounted outside the living space draws soil gas through sealed polyvinyl chloride (PVC) pipe and discharges it above the roofline.
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Follow-Up Test in the Basement
After 24 hours or more of runtime, a radon test down in the basement records how far the level fell. We include it in your written quote.
How the job runs
Our Basement Radon Mitigation Process
Every basement system follows a home-specific plan, from the first radon number to the verified result.
- 1 Step 1
Tell Us About the Basement
Send your ZIP code and radon result. Our PA DEP-certified team reviews it and calls you to set up a visit.
- 2 Step 2
Assessment and Design
We inspect the slab, sump, drain tile and walls, then settle suction points and a pipe route that suit the foundation and how you use the space.
- 3 Step 3
Seal and Install
The sump gets sealed, cracks and joints are closed, and the suction point, pipe and fan all go in.
- 4 Step 4
Verify Down There
A follow-up test in the basement confirms the new level, and we show you how to keep an eye on the system.
Free estimates · PA DEP-certified radon mitigation firm
High Radon in Your York Basement? Call Us
Tell us what you are working with: sump pit or none, block or stone, finished or open studs. Our certified crew reviews it and calls you with a free quote.
Upfront pricing
Basement Radon Mitigation Cost in York, PA
Typical ranges York homeowners are quoted for basement radon systems. We confirm your price in writing.
Most popular
Sealed Sump System
$875–$1,500 basement with sump and drain tile
- Airtight lid that still opens for service
- Suction pulled through the sump and drain tile
- Fan and vent discharging above the roofline
- Follow-up test: confirm it is in the quote
Finished Basement System
$1,500–$1,900 hidden interior routing
- Pipe run through closets or utility space
- Access left at the suction point and gauge
- Reachable cracks and joints sealed
- Follow-up test: confirm it is in the quote
Block or Stone Foundation
$1,900–$2,200 walls that leak soil gas
- Slab suction paired with wall sealing
- Block wall suction where readings call for it
- A fan sized for higher static pressure
- Follow-up test: confirm it is in the quote
Price follows the foundation itself: how it was built, how suction spreads under the slab, how much is finished, and where the pipe can run. We confirm it in writing before work starts.
Health and household safety
Healthier Lower-Level Living
Pull the radon level down in the basement and the floors above it come down with it.
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Safer Finished Basements
A bedroom, playroom or home office below grade is exactly where lowering radon changes daily exposure the most.
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The Sump Pump Still Works
Airtight covers are built with a removable lid and sealed pass-throughs, so the pump can be pulled, serviced and sealed back up.
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A Drier Basement, Sometimes
Slab suction can pull some soil moisture away from the basement as a side effect, though it is no substitute for real waterproofing.
Before, during, after
Getting the Basement Ready
Before the Visit
- Move stored items at least three feet clear of the sump, the planned suction point and the pipe route.
- Check that the sump pump runs, and mention any trouble it has given you lately.
- Point out finished areas, upcoming renovations and any wall you would rather our crew stayed off.
- Have your basement radon result and the date it was taken ready to share.
During the Visit
Most basement jobs finish inside a day. Our crew cores the slab, fits the sump cover, seals reachable cracks and joints, runs the pipe and hangs the fan. Coring kicks up dust for a few minutes, and a vacuum at the bit typically catches it.
After the Work
The system runs from the moment it is switched on. After at least 24 hours, a follow-up test in the basement records the new level. Keep the sump lid sealed and glance at the manometer once a month.
Keep radon levels low
Keeping Basement Radon Low
A basement system does its best work when the basement stays sealed and the parts stay reachable.
- 01
Keep the sump cover bolted down, and ask anyone servicing the pump to reseal it before leaving.
- 02
Seal new floor and wall cracks as they show up, especially after settling or plumbing work.
- 03
Plan access panels at the suction point and manometer before you close in any basement wall.
- 04
Retest the basement at least every two years, and after any renovation or foundation repair.
York, PA local insight
Basement Radon Systems for York, PA Homes
York basements come in every style the last hundred years produced. Row and twin homes downtown often sit on fieldstone or rubble walls, with dirt-floor sections that somebody poured concrete over decades later. Mid-century houses in West York, North York and Grantley usually have block walls and an older sump pit. Newer construction around East York and Valley View tends to have poured walls and perimeter drain tile. The sump basin there makes an excellent suction point the moment it is sealed.
Because radon climbs out of the soil, the basement is almost always where it enters and where it piles up. York County carries an EPA Zone 1 rating, the highest radon potential category on the EPA map of radon zones (opens in a new tab), and that alone earns local basements a test. It earns one twice over before you finish a lower level or turn it into a bedroom or an office.
Begin with solid radon testing down in the basement. If the number comes back high, basement mitigation uses the same active approach as a full radon system installation. The difference is how much attention goes to the sump, the drain tile and the way the walls were built. The EPA Consumer’s Guide to Radon Reduction (opens in a new tab) describes sub-slab suction as the most common way to fix a home. In Pennsylvania, that work has to be done by a mitigator certified under 25 Pa. Code § 240, and our crew holds that certification.
Is there already a pipe down there while the level creeps back up? A radon system repair visit usually turns up an unsealed sump lid or a leaking coupling. A worn-out fan is handled with radon fan replacement. To picture what the suction under your slab is doing, read how sub-slab radon mitigation works, or start at radon mitigation in York to book a free estimate.
Local radon standards
Why Choose Our Certified Crew for Your Basement
We combine accurate radon data, a system designed for your foundation, clean installation and a follow-up test that proves the result.
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PA DEP-Certified Crew
Pennsylvania requires DEP certification to mitigate radon for hire. We are a PA DEP-certified mitigation firm, and you can ask us for our certification number.
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Finished Rooms Stay Finished
Tell us the basement is finished and our crew arrives ready to plan a route that leaves drywall and ceilings alone.
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Proof You Can Hold
A follow-up test plus a working manometer show you the basement level came down and stayed down. We include both with every system.
Where we work
Where We Fix Basement Radon
We cover York and its bordering neighborhoods: West York, North York, East York, Valley View, Grantley. Call with your address to confirm the next available appointment.
- West York 17404
- North York 17404
- East York 17402
- Valley View 17402
- Grantley 17403
York ZIP codes served
- 17401
- 17402
- 17403
- 17404
Radon Mitigation York
805 E Prospect St, York, PA 17403
Mon to Fri: 8:00 AM to 6:00 PM · Saturday: 9:00 AM to 2:00 PM
Straight answers
Basement Radon Mitigation FAQs
Need help with a detail not covered here? Call (717) 275-0074.
(717) 275-0074 Yes. Radon comes up from the soil, so the lowest level of a house usually holds the highest concentration. That is why a radon test belongs in the lowest level you live in.
No, sealing on its own is not a radon reduction method the EPA accepts. Sealing supports active sub-slab suction by stopping the fan from pulling basement air, and it never replaces that suction.
Yes. We route pipe through utility rooms, closets, the garage or the exterior. Access stays open at the suction point and manometer, so your finished space stays intact.
Nothing changes for the pump. A proper airtight cover is removable and has sealed openings for the discharge line and the power cord, so it can still be serviced normally.
Yes, fixing the basement lowers radon on every floor. Radon entering at the foundation drifts up through the rest of the house, so stopping the gas at the slab cuts the reading upstairs as well.
Our own crew at Radon Mitigation York, a firm certified by the Pennsylvania Department of Environmental Protection (DEP). We quote, install and stand behind our own work. Ask us for our DEP certification number.
Free estimate · Written quote
Book Your Basement Radon Mitigation
Seal the sump, stop the gas at the slab, and vent it above the roof. Send us your ZIP and test result, and our PA DEP-certified crew will call with a free quote.
Sources
- Pennsylvania DEP, Radon Test Results, September 1986 to Current (data.pa.gov)
- Pennsylvania DEP, Radon Mitigation System Year, 1987 to Current (data.pa.gov)
- U.S. EPA, Consumer's Guide to Radon Reduction
- U.S. EPA, Radon publications (A Citizen's Guide to Radon, Home Buyer's and Seller's Guide)
- AARST, ANSI/AARST radon standards
- Pennsylvania Code, 25 Pa. Code Chapter 240, Radon Certification
Data retrieved October 21, 2026. Links, dates and methods for every source are on our sources and resources page.