Buying a home in Colliano
3,455 residents at the 2021 census, 2,295 buildings and 55.2 km² of territory, Campania.
Colliano is in seismic zone 1: the most hazardous zone: the probability of a strong earthquake is high. According to ISPRA’s mosaic, 19.1% of the territory of Colliano has high or very high landslide hazard (P3 and P4), with 22% of the residents. 0.7% of the territory of Colliano is in the flood area of the medium-probability scenario (P2), with 0.7% of the residents.
Find your address in Colliano
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Colliano compared
| ISPRA indicator | Colliano | SA | Campania |
|---|---|---|---|
| Landslide, very high hazard (P4) | 8.2% | 5.8% | 9.5% |
| Landslide, high hazard (P3) | 10.9% | 16.8% | 10.1% |
| Landslide, areas of attention | 49.5% | 23.3% | 22% |
| Residents in landslide areas P3-P4 | 22% | 8.3% | 4.7% |
| Buildings in landslide areas P3-P4 | 14.5% | 13.2% | 9.2% |
| Flood, high probability (P3) | 0.4% | 2% | 2.5% |
| Flood, medium probability (P2) | 0.7% | 3.7% | 5.7% |
| Flood, low probability (P1) | 0.7% | 4% | 6.2% |
| Residents in P2 flood areas | 0.7% | 10% | 5.1% |
| Buildings in P2 flood areas | 0.8% | 6.5% | 5.9% |
Questions
Which seismic zone is Colliano in?
Colliano is in seismic zone 1: the most hazardous zone: the probability of a strong earthquake is high.
How much of Colliano is in landslide class P3/P4?
According to ISPRA’s mosaic, 19.1% of the territory of Colliano has high or very high landslide hazard (P3 and P4), with 22% of the residents. By share of territory with landslide hazard P3-P4, Colliano ranks 80th of 158 municipalities in the province of Salerno.
How much of Colliano is in flood scenario P2?
0.7% of the territory of Colliano is in the flood area of the medium-probability scenario (P2), with 0.7% of the residents. By share of territory in the P2 flood area, Colliano ranks 100th of 158 municipalities in the province of Salerno.
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 |
|---|---|---|---|
| Valva | 1 | 22.9% | 3.5% |
| Laviano | 1 | 17.7% | 0% |
| Palomonte | 2 | 34.9% | 0% |
| San Gregorio Magno | 1 | 13.8% | 0% |
| Buccino | 1 | 15.1% | 4% |
| Oliveto Citra | 2 | 53.9% | 2.2% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on