Province of Valle d’Aosta
Natural hazards and seismic zone municipality by municipality, for home buyers.
According to ISPRA’s mosaic, 83.7% of the territory of the province of Valle d’Aosta has high or very high landslide hazard (P3 and P4), with 10.9% of the residents. 7.3% of the territory of the province of Valle d’Aosta is in the flood area of the medium-probability scenario (P2), with 9.1% of the residents. Among Italy’s 107 provinces it ranks 1st for landslide hazard P3-P4 and 49th for flood area (P2).
Municipalities by seismic zone: 74 in zone 3.
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Municipalities by share of territory in landslide class P3/P4
| Pontboset | 98.6% |
|---|---|
| Rhêmes-Saint-Georges | 97.4% |
| Oyace | 96.3% |
| Issime | 96% |
| Courmayeur | 95.7% |
| Bionaz | 95.1% |
| Rhêmes-Notre-Dame | 94.2% |
| La Thuile | 94.2% |
| Valsavarenche | 94% |
| La Magdeleine | 93.8% |
Municipalities by share of territory in flood scenario P2
| Verrès | 18.4% |
|---|---|
| Rhêmes-Saint-Georges | 16.7% |
| Pollein | 16% |
| Gressan | 15% |
| Courmayeur | 14.6% |
| Hône | 14.5% |
| Antey-Saint-André | 14% |
| Saint-Oyen | 13.8% |
| Pré-Saint-Didier | 12.8% |
| Brusson | 12.6% |
All 74 municipalities
| Municipality | Seismic zone | Landslide P3-P4 | Flood P2 |
|---|---|---|---|
| Allein | 3 | 49.5% | 3% |
| Antey-Saint-André | 3 | 63% | 14% |
| Aosta | 3 | 15.5% | 5.6% |
| Arnad | 3 | 89.3% | 11.7% |
| Arvier | 3 | 89.7% | 6.3% |
| Avise | 3 | 89.1% | 5.8% |
| Ayas | 3 | 83.3% | 5.5% |
| Aymavilles | 3 | 86.1% | 10.5% |
| Bard | 3 | 82% | 10.9% |
| Bionaz | 3 | 95.1% | 4.7% |
| Brissogne | 3 | 68.5% | 5.4% |
| Brusson | 3 | 84.3% | 12.6% |
| Challand-Saint-Anselme | 3 | 83.8% | 9% |
| Challand-Saint-Victor | 3 | 81.2% | 6.8% |
| Chambave | 3 | 86.7% | 10.6% |
| Chamois | 3 | 68.3% | 4.7% |
| Champdepraz | 3 | 91.9% | 6% |
| Champorcher | 3 | 91% | 5.4% |
| Charvensod | 3 | 68.7% | 4.9% |
| Châtillon | 3 | 81.8% | 4.8% |
| Cogne | 3 | 89.2% | 4.4% |
| Courmayeur | 3 | 95.7% | 14.6% |
| Donnas | 3 | 71.3% | 10.1% |
| Doues | 3 | 67.5% | 4.7% |
| Emarèse | 3 | 77.5% | 1.4% |
| Etroubles | 3 | 78.9% | 5% |
| Fénis | 3 | 89.5% | 8.5% |
| Fontainemore | 3 | 82.5% | 5.4% |
| Gaby | 3 | 93.2% | 6.2% |
| Gignod | 3 | 54% | 5.8% |
| Gressan | 3 | 45.4% | 15% |
| Gressoney-La-Trinité | 3 | 87.5% | 4.1% |
| Gressoney-Saint-Jean | 3 | 91.8% | 6.9% |
| Hône | 3 | 74.4% | 14.5% |
| Introd | 3 | 87.3% | 2.4% |
| Issime | 3 | 96% | 9.1% |
| Issogne | 3 | 87.9% | 9.7% |
| Jovençan | 3 | 49.9% | 6.6% |
| La Magdeleine | 3 | 93.8% | 6.2% |
| La Salle | 3 | 92.7% | 5.3% |
| La Thuile | 3 | 94.2% | 4.4% |
| Lillianes | 3 | 62.9% | 4.8% |
| Montjovet | 3 | 79.3% | 11.5% |
| Morgex | 3 | 66% | 6.3% |
| Nus | 3 | 89.1% | 4.6% |
| Ollomont | 3 | 88.6% | 10.6% |
| Oyace | 3 | 96.3% | 1.7% |
| Perloz | 3 | 81.9% | 5.4% |
| Pollein | 3 | 59.4% | 16% |
| Pont-Saint-Martin | 3 | 62.2% | 6.6% |
| Pontboset | 3 | 98.6% | 8% |
| Pontey | 3 | 70.4% | 9.7% |
| Pré-Saint-Didier | 3 | 81.3% | 12.8% |
| Quart | 3 | 63% | 8.8% |
| Rhêmes-Notre-Dame | 3 | 94.2% | 9.8% |
| Rhêmes-Saint-Georges | 3 | 97.4% | 16.7% |
| Roisan | 3 | 44.9% | 3.4% |
| Saint-Christophe | 3 | 43.8% | 3.2% |
| Saint-Denis | 3 | 38.4% | 2.3% |
| Saint-Marcel | 3 | 90.9% | 9.8% |
| Saint-Nicolas | 3 | 57% | 2.5% |
| Saint-Oyen | 3 | 89.6% | 13.8% |
| Saint-Pierre | 3 | 35.6% | 4.6% |
| Saint-Rhémy-en-Bosses | 3 | 87.8% | 8.2% |
| Saint-Vincent | 3 | 55.5% | 4% |
| Sarre | 3 | 72.4% | 3.1% |
| Torgnon | 3 | 71.6% | 5% |
| Valgrisenche | 3 | 85.9% | 8.8% |
| Valpelline | 3 | 84.2% | 4.8% |
| Valsavarenche | 3 | 94% | 7.4% |
| Valtournenche | 3 | 73.8% | 4.6% |
| Verrayes | 3 | 52.9% | 3% |
| Verrès | 3 | 50.8% | 18.4% |
| Villeneuve | 3 | 63% | 5.9% |
Landslides and floods in the province
| ISPRA indicator | AO | Valle d'Aosta/Vallée d'Aoste |
|---|---|---|
| Landslide, very high hazard (P4) | 48.9% | 48.9% |
| Landslide, high hazard (P3) | 34.8% | 34.8% |
| Landslide, areas of attention | 0% | 0% |
| Residents in landslide areas P3-P4 | 10.9% | 10.9% |
| Buildings in landslide areas P3-P4 | 22.6% | 22.6% |
| Flood, high probability (P3) | 5% | 5% |
| Flood, medium probability (P2) | 7.3% | 7.3% |
| Flood, low probability (P1) | 9.2% | 9.2% |
| Residents in P2 flood areas | 9.1% | 9.1% |
| Buildings in P2 flood areas | 11.1% | 11.1% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on