Best Radon Testing in Montgomery County, PA
Compare 25 local radon testing providers in Montgomery County. Verified listings with real contact info.
25 services listed
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A1 House Prep
340 Freed Rd, Harleysville, PA 19438
5 ★
105 reviews
Musselman Home Inspection
517 Park Ave, Harleysville, PA 19438
Monday: 8:00 AM – 9:00 PM | Tuesday: 8:00 AM – 9:00 PM | Wednesday: 8:00 AM – 9:00 PM | Thursday: 8:00 AM – 9:00 PM | Friday: 8:00 AM – 9:00 PM | Saturday: 9:00 AM – 8:00 PM | Sunday: 1:00 – 6:00 PM
5 ★
400 reviews
Inspect All Home Inspections
421 Derstine Ave, Lansdale, PA 19446
Monday: 7:00 AM – 7:00 PM | Tuesday: 7:00 AM – 7:00 PM | Wednesday: 7:00 AM – 7:00 PM | Thursday: 7:00 AM – 7:00 PM | Friday: 7:00 AM – 7:00 PM | Saturday: 7:00 AM – 7:00 PM | Sunday: 7:00 AM – 7:00 PM
5 ★
384 reviews
Airotox Radon Remediation Services
14 E Main St Suite 200, Lansdale, PA 19446
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 4:00 PM | Saturday: Closed | Sunday: Closed
5 ★
181 reviews
SPY Inspection Services
14 E Main St #100, Lansdale, PA 19446
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 4:00 PM | Saturday: Closed | Sunday: Closed
4.5 ★
40 reviews
Radon-Rid, LLC
693 Egypt Rd, Phoenixville, PA 19460
Monday: 8:00 AM – 3:00 PM | Tuesday: 8:00 AM – 3:00 PM | Wednesday: 8:00 AM – 3:00 PM | Thursday: 8:00 AM – 3:00 PM | Friday: Closed | Saturday: Closed | Sunday: Closed
4.7 ★
55 reviews
Radon Technology & Enviromental
828 Oak St, Royersford, PA 19468
Monday: 9:00 AM – 5:00 PM | Tuesday: 9:00 AM – 5:00 PM | Wednesday: 9:00 AM – 5:00 PM | Thursday: 9:00 AM – 5:00 PM | Friday: 9:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
4.9 ★
234 reviews
Alpha Radon Reduction LLC
2625 Bristol Rd, Warrington, PA 18976
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: 8:00 AM – 12:00 PM | Sunday: Closed
3.9 ★
7 reviews
Pillar To Post Home Inspectors - Team Gertsen
915 Samantha Cir, Chester Springs, PA 19425
Monday: 8:00 AM – 8:00 PM | Tuesday: 8:00 AM – 8:00 PM | Wednesday: 8:00 AM – 8:00 PM | Thursday: 8:00 AM – 8:00 PM | Friday: 8:00 AM – 8:00 PM | Saturday: 8:00 AM – 8:00 PM | Sunday: 8:00 AM – 8:00 PM
5 ★
272 reviews
Supreme Radon
305 Cameron Dr, Douglassville, PA 19518
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
5 ★
48 reviews
RVS Radon Mitigation, LLC
294 E Cheltenham Ave, Philadelphia, PA 19120
Monday: 8:00 AM – 6:00 PM | Tuesday: 8:00 AM – 6:00 PM | Wednesday: 8:00 AM – 6:00 PM | Thursday: 8:00 AM – 6:00 PM | Friday: 8:00 AM – 6:00 PM | Saturday: Closed | Sunday: Closed
5 ★
106 reviews
Pro-Spect Inspection Services PA
1240 West Chester Pike STE 207, West Chester, PA 19382
Monday: 8:00 AM – 9:00 PM | Tuesday: 8:00 AM – 9:00 PM | Wednesday: 8:00 AM – 9:00 PM | Thursday: 8:00 AM – 9:00 PM | Friday: 8:00 AM – 9:00 PM | Saturday: 9:00 AM – 4:00 PM | Sunday: 1:00 – 6:00 PM
5 ★
1283 reviews
Valley Home Inspectors LLC
224 Walker Rd, Macungie, PA 18062
Monday: 8:00 AM – 7:00 PM | Tuesday: 8:00 AM – 7:00 PM | Wednesday: 8:00 AM – 7:00 PM | Thursday: 8:00 AM – 7:00 PM | Friday: 8:00 AM – 7:00 PM | Saturday: 9:00 AM – 12:00 PM | Sunday: Closed
5 ★
140 reviews
Liberty Inspection Group
1215 W Baltimore Pike STE 3, Media, PA 19063
Monday: 8:00 AM – 7:00 PM | Tuesday: 8:00 AM – 7:00 PM | Wednesday: 8:00 AM – 7:00 PM | Thursday: 8:00 AM – 7:00 PM | Friday: 8:00 AM – 7:00 PM | Saturday: 10:00 AM – 6:00 PM | Sunday: 10:00 AM – 6:00 PM
4.9 ★
1778 reviews
CDA Inspection Services
173 Green St, Emmaus, PA 18049
Monday: 8:00 AM – 7:00 PM | Tuesday: 8:00 AM – 7:00 PM | Wednesday: 8:00 AM – 7:00 PM | Thursday: 8:00 AM – 7:00 PM | Friday: 8:00 AM – 7:00 PM | Saturday: 8:00 AM – 7:00 PM | Sunday: 8:00 AM – 7:00 PM
5 ★
518 reviews
Safe Shelter Environmental
7 S Wayne St, West Chester, PA 19382
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
4.8 ★
557 reviews
Anvil Radon
417 N 8th St Suite 300, Philadelphia, PA 19123
Monday: Open 24 hours | Tuesday: Open 24 hours | Wednesday: Open 24 hours | Thursday: Open 24 hours | Friday: Open 24 hours | Saturday: Open 24 hours | Sunday: Open 24 hours
5 ★
130 reviews
SIS Environmental Inspection and Testing
1172 Skelp Level Rd, Downingtown, PA 19335
Monday: 9:00 AM – 5:00 PM | Tuesday: 9:00 AM – 5:00 PM | Wednesday: 9:00 AM – 5:00 PM | Thursday: 9:00 AM – 5:00 PM | Friday: 9:00 AM – 5:00 PM | Saturday: 9:00 AM – 12:00 AM | Sunday: Closed
5 ★
3 reviews
A Radon Testing Systems
PO Box 243, Newtown, PA 18940
Monday: 9:00 AM – 10:00 PM | Tuesday: 9:00 AM – 10:00 PM | Wednesday: 9:00 AM – 10:00 PM | Thursday: 9:00 AM – 10:00 PM | Friday: 9:00 AM – 10:00 PM | Saturday: 9:00 AM – 10:00 PM | Sunday: 9:00 AM – 10:00 PM
5 ★
2 reviews
Integra Environmental
6801 Tilghman St, Allentown, PA 18106
Monday: 8:00 AM – 4:00 PM | Tuesday: 8:00 AM – 4:00 PM | Wednesday: 8:00 AM – 4:00 PM | Thursday: 8:00 AM – 4:00 PM | Friday: 8:00 AM – 4:00 PM | Saturday: Closed | Sunday: Closed
5 ★
410 reviews
SWAT Radon Mitigation
8020 Mine St, Fogelsville, PA 18051
Monday: 8:00 AM – 5:30 PM | Tuesday: 8:00 AM – 5:30 PM | Wednesday: 8:00 AM – 5:30 PM | Thursday: 8:00 AM – 5:30 PM | Friday: 8:00 AM – 5:30 PM | Saturday: Closed | Sunday: Closed
4.8 ★
51 reviews
Hera Environmental Laboratories
1879 Old Cuthbert Rd STE 1, Cherry Hill Township, NJ 08034
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
4.7 ★
58 reviews
Aerotek Environmental
3111 NJ-38 #291, Mt Laurel Township, NJ 08054
Monday: Open 24 hours | Tuesday: Open 24 hours | Wednesday: Open 24 hours | Thursday: Open 24 hours | Friday: Open 24 hours | Saturday: Open 24 hours | Sunday: Open 24 hours
4.9 ★
333 reviews
Fran the Radon Man, LLC
9 Arena St, Mantua Township, NJ 08051
Monday: 8:00 AM – 4:30 PM | Tuesday: 8:00 AM – 4:30 PM | Wednesday: 8:00 AM – 4:30 PM | Thursday: 8:00 AM – 4:30 PM | Friday: 8:00 AM – 4:30 PM | Saturday: Closed | Sunday: Closed
4.6 ★
32 reviews
Safe Air Systems Radon Mitigation LLC
15 Minneakoning Rd STE 101, Flemington, NJ 08822
Monday: 8:30 AM – 4:30 PM | Tuesday: 8:30 AM – 4:30 PM | Wednesday: 8:30 AM – 4:30 PM | Thursday: 8:30 AM – 4:30 PM | Friday: 8:30 AM – 4:30 PM | Saturday: Closed | Sunday: Closed
5 ★
291 reviews
Frequently Asked Questions
How much does radon testing cost in Pennsylvania?
Professional radon testing in Pennsylvania typically costs $150 to $300. Short-term tests (48 hours) are standard for real estate transactions. Long-term tests (90+ days) provide a more accurate annual average. The PA DEP also offers free DIY radon test kits to Pennsylvania residents through their website.
Why is radon testing so important in Pennsylvania?
Pennsylvania has some of the highest indoor radon levels in the United States. The PA DEP estimates that about 40% of homes exceed the EPA's recommended action level of 4 pCi/L. Every county in the state has homes with elevated radon. The PA DEP and EPA strongly recommend testing every home, regardless of location.
Are radon testers required to be certified in Pennsylvania?
Yes, Pennsylvania requires radon testers to be certified by the PA DEP under the Radon Certification Act. Certified testers must complete approved training, pass an exam, and follow PA DEP testing protocols. For real estate transactions, only a PA DEP-certified tester's results are accepted by lenders.
What happens if my home has high radon levels?
If radon levels exceed 4 pCi/L, the EPA recommends installing a radon mitigation system. The most common approach is sub-slab depressurization, which uses a fan and pipe to vent radon from beneath the foundation to the outside. Mitigation in Pennsylvania typically costs $800 to $1,500 and reduces radon levels by up to 99%.
When should I test for radon in Pennsylvania?
Test when buying or selling a home, after major renovations that alter the foundation, if you've never tested, or if your last test was more than 2 years ago. Testing is best done during the heating season (October through March) when windows are typically closed and radon levels tend to be highest.