New Jersey Indoor Air Quality Guide
New Jersey is the densest state — shared walls multiply indoor air quality exposures
Zone 1 — Highest potential (predicted average > 4 pCi/L)
Radon Levels in New Jersey
Average Radon Level
5.0 pCi/L
EPA Zone
Zone 1
New Jersey is heavily Zone 1. The Reading Prong geological formation creates very high radon in Hunterdon, Somerset, and Warren counties. Statewide testing rates are high.
⚠️ Testing strongly recommended
New Jersey is Zone 1 — the highest risk category. Test every home. If levels are 4 pCi/L or above, install a mitigation system immediately.
Top Indoor Air Hazards in New Jersey
Radon Gas
CRITICALRadon is the #2 cause of lung cancer after smoking. It seeps from soil into basements and crawl spaces. You cannot see, smell, or taste it. The only way to know is to test.
Lead Paint Dust
CRITICALLead paint was banned in 1978 but remains in millions of homes. Sanding, scraping, or peeling paint releases lead dust that causes irreversible brain damage in children. There is no safe level of lead exposure.
Mold Exposure
HIGH RISKMold releases spores that trigger allergies, asthma attacks, and respiratory infections. Black mold (Stachybotrys chartarum) produces mycotoxins linked to neurological symptoms.
New Jersey Climate & Air Quality Factors
Densest state in the US means tight housing and shared walls. High industrial legacy creates localized air quality issues. Old housing in Newark and Jersey City has extensive lead paint. Coastal humidity adds mold risk.
Recommended Products for New Jersey Homes
First Alert Radon Gas Test Kit
EPA-listed short-term radon test. Lab fees included. Results in days.
Airthings Corentium Home Radon Detector
Continuous digital radon monitoring. No lab fees. Real-time readings.
RadonAway RP140 Radon Mitigation Fan
Professional-grade radon mitigation fan. 4-inch. The core component of any radon reduction system. Cuts radon levels by up to 99%.
3M LeadCheck Instant Lead Test Kit
Instant results. EPA-recognized. Test paint, dust, and soil.
Disclaimer
State-level radon data from EPA Zone Map. Individual home levels vary significantly. This guide is for educational purposes and not a substitute for professional environmental testing. Test your home regardless of zone designation.
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