Buying a home in Onano
912 residents at the 2021 census, 439 buildings and 24.5 km² of territory, Lazio.
Onano is in seismic zone 2 (the region uses the sub-zones 2B): in this zone strong earthquakes are possible. According to ISPRA’s mosaic, 0.7% of the territory of Onano has high or very high landslide hazard (P3 and P4), with 0.8% of the residents. 0% of the territory of Onano is in the flood area of the medium-probability scenario (P2), with 0% of the residents.
Find your address in Onano
The preview is free: the parcel, the seismic zone and the types of flags. The full dossier costs €29 including applicable VAT.
Onano compared
| ISPRA indicator | Onano | VT | Lazio |
|---|---|---|---|
| Landslide, very high hazard (P4) | 0.2% | 0.9% | 4.3% |
| Landslide, high hazard (P3) | 0.5% | 2.7% | 1.2% |
| Landslide, areas of attention | 0% | 1.9% | 8.3% |
| Residents in landslide areas P3-P4 | 0.8% | 4.5% | 1.5% |
| Buildings in landslide areas P3-P4 | 1.6% | 4.1% | 3.2% |
| Flood, high probability (P3) | 0% | 2.4% | 2.6% |
| Flood, medium probability (P2) | 0% | 3% | 3.5% |
| Flood, low probability (P1) | 0% | 3.4% | 5.7% |
| Residents in P2 flood areas | 0% | 1% | 3.2% |
| Buildings in P2 flood areas | 0% | 1.7% | 3.4% |
Questions
Which seismic zone is Onano in?
Onano is in seismic zone 2 (the region uses the sub-zones 2B): in this zone strong earthquakes are possible.
How much of Onano is in landslide class P3/P4?
According to ISPRA’s mosaic, 0.7% of the territory of Onano has high or very high landslide hazard (P3 and P4), with 0.8% of the residents. By share of territory with landslide hazard P3-P4, Onano ranks 39th of 60 municipalities in the province of Viterbo.
How much of Onano is in flood scenario P2?
0% of the territory of Onano is in the flood area of the medium-probability scenario (P2), with 0% of the residents. In the province of Viterbo, 38 of 60 municipalities have no territory in the P2 flood area.
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 |
|---|---|---|---|
| Latera | 2B | 10.4% | 1% |
| Grotte di Castro | 2B | 1.2% | 0% |
| Sorano | 3 | 13.8% | 1.3% |
| Gradoli | 2B | 0.5% | 0% |
| San Lorenzo Nuovo | 2B | 1.6% | 0% |
| Valentano | 2B | 6.8% | 1.1% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on