Buying a home in Castell’Alfero
2,637 residents at the 2021 census, 1,054 buildings and 20.1 km² of territory, Piemonte.
Castell’Alfero is in seismic zone 4: the least hazardous zone: the probability of an earthquake is very low. According to ISPRA’s mosaic, 1% of the territory of Castell’Alfero has high or very high landslide hazard (P3 and P4), with 0.2% of the residents. 9.4% of the territory of Castell’Alfero is in the flood area of the medium-probability scenario (P2), with 2.9% of the residents.
Find your address in Castell’Alfero
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Castell’Alfero compared
| ISPRA indicator | Castell'Alfero | AT | Piemonte |
|---|---|---|---|
| Landslide, very high hazard (P4) | 0.1% | 2.3% | 3.1% |
| Landslide, high hazard (P3) | 0.9% | 4.2% | 3.7% |
| Landslide, areas of attention | 0% | 0% | 0% |
| Residents in landslide areas P3-P4 | 0.2% | 1.5% | 1.8% |
| Buildings in landslide areas P3-P4 | 0.1% | 2% | 4.4% |
| Flood, high probability (P3) | 8% | 6.2% | 5.1% |
| Flood, medium probability (P2) | 9.4% | 7.7% | 8.3% |
| Flood, low probability (P1) | 16.2% | 11% | 13% |
| Residents in P2 flood areas | 2.9% | 2.3% | 4.9% |
| Buildings in P2 flood areas | 3% | 2.6% | 5.8% |
Questions
Which seismic zone is Castell’Alfero in?
Castell’Alfero is in seismic zone 4: the least hazardous zone: the probability of an earthquake is very low.
How much of Castell’Alfero is in landslide class P3/P4?
According to ISPRA’s mosaic, 1% of the territory of Castell’Alfero has high or very high landslide hazard (P3 and P4), with 0.2% of the residents. By share of territory with landslide hazard P3-P4, Castell’Alfero ranks 103rd of 117 municipalities in the province of Asti, tied with 1 others.
How much of Castell’Alfero is in flood scenario P2?
9.4% of the territory of Castell’Alfero is in the flood area of the medium-probability scenario (P2), with 2.9% of the residents. By share of territory in the P2 flood area, Castell’Alfero ranks 29th of 117 municipalities in the province of Asti.
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 |
|---|---|---|---|
| Frinco | 4 | 2.2% | 8.6% |
| Corsione | 4 | 4.7% | 1.5% |
| Calliano Monferrato | 4 | 5.7% | 6.7% |
| Villa San Secondo | 4 | 7.5% | 7.9% |
| Tonco | 4 | 6.7% | 11.9% |
| Cossombrato | 4 | 2.8% | 3.2% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on