Radon zones in New Jersey
| Atlantic County | New Jersey | 3 |
| Bergen County | New Jersey | 2 |
| Burlington County | New Jersey | 2 |
| Camden County | New Jersey | 2 |
| Cape May County | New Jersey | 3 |
| Cumberland County | New Jersey | 2 |
| Essex County | New Jersey | 2 |
| Gloucester County | New Jersey | 2 |
| Hunterdon County | New Jersey | 1 |
| Mercer County | New Jersey | 1 |
| Monmouth County | New Jersey | 1 |
| Morris County | New Jersey | 1 |
| Ocean County | New Jersey | 3 |
| Salem County | New Jersey | 2 |
| Somerset County | New Jersey | 1 |
| Sussex County | New Jersey | 1 |
| Union County | New Jersey | 2 |
| Warren County | New Jersey | 1 |
Sources
- New Jersey: EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
- EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
- New Jersey: EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
- EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
- New Jersey: EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
- EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
- New Jersey: EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
- EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
- New Jersey: EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
- EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
- New Jersey: EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
- EPA Map of Radon Zones, US Environmental Protection Agency, checked 1 November 2026
"Secondary" marks a source used only because the official page could not be read.