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.
Tracadie-Sheila has the highest measured indoor radon in New Brunswick at 281.8 Bq/m³, based on Airthings measurements across 19 cities.
Updated August 16, 2026
Highest city
281.8Bq/m³
Tracadie-Sheila
New Brunswick city average
148.4Bq/m³
across 19 cities
Above action level
4/ 19
cities
| # | Location | Avg level | Monitors | vs action level |
|---|---|---|---|---|
| 1 | Tracadie-Sheila | 281.8 Bq/m³ | 35 | 1.4× over |
| 2 | Campbellton | 274.2 Bq/m³ | 27 | 1.4× over |
| 3 | Miramichi | 226.2 Bq/m³ | 31 | 1.1× over |
| 4 | Florenceville-Bristol | 223.6 Bq/m³ | 8 | 1.1× over |
| ✓ Below EPA action level (200 Bq/m³) | ||||
| 5 | Edmundston | 196.6 Bq/m³ | 44 | 1.0× under |
| 6 | Bathurst | 195.9 Bq/m³ | 43 | 1.0× under |
| 7 | Nackawic | 186.8 Bq/m³ | 10 | 0.9× under |
| 8 | Bouctouche | 149.6 Bq/m³ | 15 | 0.7× under |
| 9 | Shediac | 122.3 Bq/m³ | 58 | 0.6× under |
| 10 | Saint John | 116.8 Bq/m³ | 122 | 0.6× under |
| 11 | Saint Andrews | 113.1 Bq/m³ | 16 | 0.6× under |
| 12 | Sussex | 111.1 Bq/m³ | 17 | 0.6× under |
| 13 | Fredericton | 103.1 Bq/m³ | 199 | 0.5× under |
| 14 | Salisbury | 94.3 Bq/m³ | 36 | 0.5× under |
| 15 | Hampton | 94.1 Bq/m³ | 66 | 0.5× under |
| 16 | Sackville | 93.2 Bq/m³ | 13 | 0.5× under |
| 17 | Moncton | 83.0 Bq/m³ | 234 | 0.4× under |
| 18 | Dieppe | 82.5 Bq/m³ | 64 | 0.4× under |
| 19 | Oromocto | 72.1 Bq/m³ | 42 | 0.4× under |