| Commune | Sample size | Minimum (µg/L) | Maximum (µg/L) | % of contamination above 10 µg/L | Arsenic concentration (µg/L) | ||||
| <0.5 | 0.5 - 10 | 10 - 50 | 50 - 100 | ≥100 | |||||
| Guibaré | 111 | <0.5* | 34.3 | 10.8% | 52 | 47 | 12 | 00 | 00 |
| Sabcé | 89 | <0.5 | 631 | 16.8% | 32 | 42 | 9 | 01 | 05 |
| Kongoussi | 151 | <0.5 | 368 | 11.2% | 80 | 54 | 13 | 02 | 02 |
| Bourzanga | 77 | <0.5 | 0.64 | 0.0% | 76 | 01 | 00 | 00 | 00 |
| Nasséré | 38 | <0.5 | 24.2 | 10.5% | 24 | 10 | 04 | 00 | 00 |
| Rollo | 45 | <0.5 | 48.5 | 8.3% | 35 | 06 | 04 | 00 | 00 |
| Rouko | 53 | <0.5 | 228 | 22.6% | 20 | 21 | 07 | 01 | 04 |
| Tikaré | 76 | <0.5 | 25.7 | 14.4% | 35 | 30 | 11 | 00 | 00 |
| Zimtenga | 67 | <0.5 | 46.7 | 7.4% | 32 | 30 | 05 | 00 | 00 |
| Bam Province | 707 | <0.5 | 631 | 11.3% | 386 | 241 | 65 | 04 | 11 |