Buying a home in Bionaz
218 residents at the 2021 census, 397 buildings and 142.1 km² of territory, Valle d’Aosta/Vallée d’Aoste.
Bionaz is in seismic zone 3: in this zone strong earthquakes are less likely than in zones 1 and 2. According to ISPRA’s mosaic, 95.1% of the territory of Bionaz has high or very high landslide hazard (P3 and P4), with 22.9% of the residents. 4.7% of the territory of Bionaz is in the flood area of the medium-probability scenario (P2), with 7.3% of the residents.
Find your address in Bionaz
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Bionaz compared
| ISPRA indicator | Bionaz | AO | Valle d'Aosta/Vallée d'Aoste |
|---|---|---|---|
| Landslide, very high hazard (P4) | 83.2% | 48.9% | 48.9% |
| Landslide, high hazard (P3) | 11.9% | 34.8% | 34.8% |
| Landslide, areas of attention | 0% | 0% | 0% |
| Residents in landslide areas P3-P4 | 22.9% | 10.9% | 10.9% |
| Buildings in landslide areas P3-P4 | 39% | 22.6% | 22.6% |
| Flood, high probability (P3) | 4.4% | 5% | 5% |
| Flood, medium probability (P2) | 4.7% | 7.3% | 7.3% |
| Flood, low probability (P1) | 5.2% | 9.2% | 9.2% |
| Residents in P2 flood areas | 7.3% | 9.1% | 9.1% |
| Buildings in P2 flood areas | 7.1% | 11.1% | 11.1% |
Questions
Which seismic zone is Bionaz in?
Bionaz is in seismic zone 3: in this zone strong earthquakes are less likely than in zones 1 and 2.
How much of Bionaz is in landslide class P3/P4?
According to ISPRA’s mosaic, 95.1% of the territory of Bionaz has high or very high landslide hazard (P3 and P4), with 22.9% of the residents. By share of territory with landslide hazard P3-P4, Bionaz ranks 6th of 74 municipalities in the province of Valle d’Aosta.
How much of Bionaz is in flood scenario P2?
4.7% of the territory of Bionaz is in the flood area of the medium-probability scenario (P2), with 7.3% of the residents. By share of territory in the P2 flood area, Bionaz ranks 56th of 74 municipalities in the province of Valle d’Aosta.
Guides: seismic zone · landslides and floods · what to check before an offer. OMI prices: GEOPOI (how to read them).
Nearby municipalities
| Municipality | Seismic zone | Landslide P3-P4 | Flood P2 |
|---|---|---|---|
| Oyace | 3 | 96.3% | 1.7% |
| Torgnon | 3 | 71.6% | 5% |
| Nus | 3 | 89.1% | 4.6% |
| Valtournenche | 3 | 73.8% | 4.6% |
| Valpelline | 3 | 84.2% | 4.8% |
| Ollomont | 3 | 88.6% | 10.6% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on