New Brunswick Cities Ranked by Indoor Radon Levels
Measured averages from Airthings devices across New Brunswick, Canada. Action level: 200 Bq/m³ — the threshold at which remediation is recommended.
Campbellton has the highest measured indoor radon in New Brunswick at 274.2 Bq/m³, based on Airthings measurements across 20 cities.
Updated October 19, 2026
Highest city
274.2Bq/m³
Campbellton
New Brunswick city average
148.1Bq/m³
across 20 cities
Above action level
4/ 20
cities
| # | Location | Avg level | vs action level |
|---|---|---|---|
| 1 | Campbellton | 274.2 Bq/m³ | 1.4× over |
| 2 | Tracadie-Sheila | 272.4 Bq/m³ | 1.4× over |
| 3 | Florenceville-Bristol | 238.0 Bq/m³ | 1.2× over |
| 4 | Miramichi | 227.3 Bq/m³ | 1.1× over |
| ✓ Below EPA action level (200 Bq/m³) | |||
| 5 | Bathurst | 197.3 Bq/m³ | 1.0× under |
| 6 | Edmundston | 196.6 Bq/m³ | 1.0× under |
| 7 | Nackawic | 186.8 Bq/m³ | 0.9× under |
| 8 | Bouctouche | 149.6 Bq/m³ | 0.7× under |
| 9 | Shediac | 131.7 Bq/m³ | 0.7× under |
| 10 | Richibucto | 119.5 Bq/m³ | 0.6× under |
| 11 | Saint John | 117.7 Bq/m³ | 0.6× under |
| 12 | Sussex | 111.1 Bq/m³ | 0.6× under |
| 13 | Saint Andrews | 109.6 Bq/m³ | 0.5× under |
| 14 | Fredericton | 104.4 Bq/m³ | 0.5× under |
| 15 | Salisbury | 96.2 Bq/m³ | 0.5× under |
| 16 | Hampton | 94.0 Bq/m³ | 0.5× under |
| 17 | Sackville | 93.2 Bq/m³ | 0.5× under |
| 18 | Dieppe | 87.3 Bq/m³ | 0.4× under |
| 19 | Moncton | 83.5 Bq/m³ | 0.4× under |
| 20 | Oromocto | 71.4 Bq/m³ | 0.4× under |