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Best Radon Testing in London, OH

Compare 8 local radon testing providers in London. Verified listings with real contact info.

8 verified providers · Updated 2026-04-07

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1

Family Safe Radon Services LLC

5.0 ★ (2 reviews)

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2

Radon Pros

5.0 ★ (93 reviews)

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3

Radon Relief LLC

5.0 ★ (1 reviews)

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1

Family Safe Radon Services LLC

5.0 (2 reviews)
1082 Exeter Ct, London, OH 43140
2

Radon Pros

5.0 (93 reviews)
1873 Sulton Ct, Grove City, OH 43123
Mon–Fri 8am–5pm · Sat–Sun 10am–3pm
3

Radon Relief LLC

5.0 (1 reviews)
9590 Mission Dr, Plain City, OH 43064
Mon–Sat 8am–8pm · Sun Closed
4

Safe Check Radon Services, LLC

5.0 (23 reviews)
6724 Perimeter Loop Rd #110, Dublin, OH 43017
Mon–Sun 8am–8pm
5

EHI Inspection Services | Ernst Home Inspections & Radon Mitigation

4.9 (421 reviews)
2727 Stoney Creek St, Springfield, OH 45504
Mon–Fri 9am–5pm · Sat–Sun Closed
6

Trusted Remediation (Trusted Companies)

5.0 (18 reviews)
765 Parsons Ave, Columbus, OH 43206
Mon–Fri 9am–5pm · Sat–Sun 10am–5pm
7

Habitation Investigation Home Inspections

4.9 (1,883 reviews)
1015 E Broad St Ste 104, Columbus, OH 43205
Open 24 Hours
8

ProCheck Radon Systems, LLC

4.9 (38 reviews)
2235 S James Rd, Columbus, OH 43232
Mon–Fri 9am–5pm · Sat–Sun Closed

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.

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