Province of Terni
Natural hazards and seismic zone municipality by municipality, for home buyers.
According to ISPRA’s mosaic, 6.3% of the territory of the province of Terni has high or very high landslide hazard (P3 and P4), with 2.4% of the residents. 3.8% of the territory of the province of Terni is in the flood area of the medium-probability scenario (P2), with 6.9% of the residents. Among Italy’s 107 provinces it ranks 57th for landslide hazard P3-P4 and 75th for flood area (P2).
Municipalities by seismic zone: 4 in zone 1, 12 in zone 2, 17 in zone 3.
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Municipalities by share of territory in landslide class P3/P4
| Allerona | 20.2% |
|---|---|
| Penna in Teverina | 18.2% |
| Giove | 15.4% |
| Castel Viscardo | 13.3% |
| San Gemini | 10.3% |
| Montecastrilli | 9.9% |
| Narni | 9.9% |
| Otricoli | 9.2% |
| Baschi | 8.4% |
| Ferentillo | 7.9% |
Municipalities by share of territory in flood scenario P2
| Attigliano | 32.1% |
|---|---|
| Monteleone d’Orvieto | 18.3% |
| Fabro | 15.4% |
| Castel Viscardo | 9.7% |
| Montefranco | 9.4% |
| Narni | 8.6% |
| Alviano | 8.2% |
| Guardea | 7.2% |
| Terni | 6.8% |
| Penna in Teverina | 6.8% |
All 33 municipalities
| Municipality | Seismic zone | Landslide P3-P4 | Flood P2 |
|---|---|---|---|
| Acquasparta | 2 | 6.6% | 0.8% |
| Allerona | 3 | 20.2% | 0.5% |
| Alviano | 3 | 4.3% | 8.2% |
| Amelia | 2 | 6.5% | 0.1% |
| Arrone | 1 | 5.8% | 4% |
| Attigliano | 3 | 0.5% | 32.1% |
| Avigliano Umbro | 2 | 3.5% | 0% |
| Baschi | 2 | 8.4% | 1.9% |
| Calvi dell’Umbria | 2 | 3.8% | 0% |
| Castel Giorgio | 3 | 1.5% | 0% |
| Castel Viscardo | 3 | 13.3% | 9.7% |
| Fabro | 3 | 4.5% | 15.4% |
| Ferentillo | 1 | 7.9% | 3.2% |
| Ficulle | 3 | 3.9% | 4.6% |
| Giove | 3 | 15.4% | 6.2% |
| Guardea | 3 | 2.3% | 7.2% |
| Lugnano in Teverina | 3 | 5.5% | 0.3% |
| Montecastrilli | 2 | 9.9% | 0.1% |
| Montecchio | 3 | 1.2% | 1% |
| Montefranco | 1 | 4.6% | 9.4% |
| Montegabbione | 3 | 4% | 0.3% |
| Monteleone d’Orvieto | 3 | 3.7% | 18.3% |
| Narni | 2 | 9.9% | 8.6% |
| Orvieto | 3 | 5% | 4.7% |
| Otricoli | 2 | 9.2% | 2.7% |
| Parrano | 3 | 4.7% | 2.9% |
| Penna in Teverina | 3 | 18.2% | 6.8% |
| Polino | 1 | 4.2% | 0% |
| Porano | 3 | 1.9% | 0% |
| San Gemini | 2 | 10.3% | 0.2% |
| San Venanzo | 2 | 4.4% | 0.2% |
| Stroncone | 2 | 5.2% | 0.9% |
| Terni | 2 | 3.5% | 6.8% |
Landslides and floods in the province
| ISPRA indicator | TR | Umbria |
|---|---|---|
| Landslide, very high hazard (P4) | 0.2% | 0.1% |
| Landslide, high hazard (P3) | 6.1% | 5.8% |
| Landslide, areas of attention | 0% | 0% |
| Residents in landslide areas P3-P4 | 2.4% | 2.1% |
| Buildings in landslide areas P3-P4 | 4.5% | 3% |
| Flood, high probability (P3) | 2.9% | 3% |
| Flood, medium probability (P2) | 3.8% | 4.3% |
| Flood, low probability (P1) | 4.2% | 6% |
| Residents in P2 flood areas | 6.9% | 7.2% |
| Buildings in P2 flood areas | 5.7% | 6.5% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on