Radon in Franklin Lakes, NJ — Risk, Testing & Top Monitors

Franklin Lakes is located in Bergen County, New Jersey — classified by the EPA as Radon Zone 1, the highest-risk designation. Franklin Lakes is one of Bergen County’s most expensive towns, known for large lakefront and wooded estate properties. Testing is the only way to know your home’s actual radon level.

RadonSafetyGuide.com helps Franklin Lakes homeowners understand their radon risk and choose the right testing or monitoring solution — from EPA-compliant test kits to continuous digital monitors.

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Why Franklin Lakes Homes Have Elevated Radon Levels

Franklin Lakes sits in northwestern Bergen County, near the Ramapo Mountains — an extension of the same uranium-rich Highlands bedrock (the Reading Prong) that runs through Morris, Somerset, and Hunterdon counties. Bergen County is classified EPA Radon Zone 1, and homes in the county’s northwestern, hillier communities tend to test higher than those closer to the Hudson River.

How Radon Enters Franklin Lakes Homes

Radon is colorless, odorless, and undetectable without a test. Common entry points in Franklin Lakes area homes include foundation cracks, uncovered sump pits, floor-wall joints, utility penetrations, and crawl spaces. The EPA recommends testing every home regardless of age or construction type.

Best Radon Test Kits & Monitors for Franklin Lakes Homes

Short-term test kits (48–96 hours) are ideal for a quick snapshot or real estate transaction. They cost $15–30 and are analyzed by an accredited lab. See our complete test kit reviews.

Continuous radon monitors track levels 24/7 and are the best long-term solution for Franklin Lakes homeowners. Our top picks:

Radon Mitigation in Franklin Lakes

If your test result is 4 pCi/L or above, the EPA recommends mitigation. The most effective method for Franklin Lakes’s older, well-established homes is sub-slab depressurization — a certified technician drills through the concrete slab, inserts a PVC pipe, and exhausts radon above the roofline. Most installations take one day and cost $900–$1,800 in the Bergen County area — slightly above the national average, reflecting the region’s older, larger housing stock. See our full radon mitigation cost guide for detailed pricing.

After mitigation, always verify results with a follow-up test. A continuous monitor like the Airthings Corentium Home or SunRADON Lüft gives real-time confirmation that levels have dropped below the EPA action level. Learn more in our complete radon mitigation guide.

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