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Best Radon Testing in Northampton County, PA

Compare 15 local radon testing providers in Northampton County. Verified listings with real contact info.

15 verified providers · Updated 2026-03-29

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1

Solid Rock Home Inspection

5.0 ★ (77 reviews)

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2

Pillar To Post Home Inspectors The Greg Newman Team

4.9 ★ (380 reviews)

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3

Al Morris Home Inspections, LLC

5.0 ★ (235 reviews)

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1

Solid Rock Home Inspection

5.0 (77 reviews)
772 Golden Eagle Dr, Nazareth, PA 18064
Mon–Fri 8am–9pm · Sat 9am–6pm · Sun Closed
2

Pillar To Post Home Inspectors The Greg Newman Team

4.9 (380 reviews)
4364 Vista Dr, Nazareth, PA 18064
Mon–Sun 7am–7pm
3

Al Morris Home Inspections, LLC

5.0 (235 reviews)
35 Clarendon Dr, Easton, PA 18040
Mon–Sun 8am–8pm
4

Lehigh Radon Solutions

5.0 (14 reviews)
1611 N 18th St, Allentown, PA 18104
Mon–Fri 8am–5pm · Sat 8am–2pm · Sun Closed
5

ARM Environmental Llc

4.3 (22 reviews)
PO Box 733, Tannersville, PA 18372
6

CDA Inspection Services

5.0 (518 reviews)
173 Green St, Emmaus, PA 18049
Mon–Sun 8am–7pm
7

Integra Environmental

5.0 (410 reviews)
6801 Tilghman St, Allentown, PA 18106
Mon–Fri 8am–4pm · Sat–Sun Closed
8

SWAT Radon Mitigation

4.8 (51 reviews)
8020 Mine St, Fogelsville, PA 18051
Mon–Fri 8am–5:30pm · Sat–Sun Closed
9

Allied Inspection Services Inc.

4.9 (427 reviews)
142 W Main St Suite 4, Macungie, PA 18062
Mon–Fri 8am–6pm · Sat 12–3pm · Sun Closed
10

Advanced Radon Services

5.0 (119 reviews)
10 Shannon Rd, Hardwick Township, NJ 07825
Mon–Fri 9am–5pm · Sat 10am–4pm · Sun Closed
11

Valley Home Inspectors LLC

5.0 (140 reviews)
224 Walker Rd, Macungie, PA 18062
Mon–Fri 8am–7pm · Sat 9am–12pm · Sun Closed
12

Safe Air Systems Radon Mitigation LLC

5.0 (291 reviews)
15 Minneakoning Rd STE 101, Flemington, NJ 08822
Mon–Fri 8:30am–4:30pm · Sat–Sun Closed
13

RAdata, LLC

4.9 (2,597 reviews)
27 Ironia Rd #2, Flanders, NJ 07836
Mon–Fri 8am–5pm · Sat 9am–5pm · Sun Closed
14

Airotox Radon Remediation Services

5.0 (181 reviews)
14 E Main St Suite 200, Lansdale, PA 19446
Mon–Thu 8am–5pm · Fri 8am–4pm · Sat–Sun Closed
15

Jersey Radon & Water

5.0 (462 reviews)
100 Somerset Corporate Blvd, Bridgewater, NJ 08807
Mon–Fri 8am–10pm · 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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