Newfoundland And Labrador Cities Ranked by Indoor Radon Levels
Measured averages from Airthings devices across Newfoundland And Labrador, Canada. Action level: 200 Bq/m³ — the threshold at which remediation is recommended.
Bay Roberts has the highest measured indoor radon in Newfoundland And Labrador at 205.9 Bq/m³, based on Airthings measurements across 12 cities.
Updated August 16, 2026
Highest city
205.9Bq/m³
Bay Roberts
Newfoundland And Labrador city average
125.7Bq/m³
across 12 cities
Above action level
2/ 12
cities
| # | Location | Avg level | Monitors | vs action level |
|---|---|---|---|---|
| 1 | Bay Roberts | 205.9 Bq/m³ | 10 | 1.0× over |
| 2 | Pasadena | 200.7 Bq/m³ | 6 | 1.0× over |
| ✓ Below EPA action level (200 Bq/m³) | ||||
| 3 | Deer Lake | 194.7 Bq/m³ | 6 | 1.0× under |
| 4 | Gambo | 184.4 Bq/m³ | 10 | 0.9× under |
| 5 | Conception Bay South | 158.6 Bq/m³ | 37 | 0.8× under |
| 6 | Wabana | 125.0 Bq/m³ | 7 | 0.6× under |
| 7 | Mount Pearl | 106.8 Bq/m³ | 63 | 0.5× under |
| 8 | Grand Falls-Windsor | 79.6 Bq/m³ | 8 | 0.4× under |
| 9 | St. John's | 79.5 Bq/m³ | 73 | 0.4× under |
| 10 | Corner Brook | 76.8 Bq/m³ | 15 | 0.4× under |
| 11 | Torbay | 62.5 Bq/m³ | 12 | 0.3× under |
| 12 | Clarenville-Shoal Harbour | 34.1 Bq/m³ | 7 | 0.2× under |