Buying a home in Castiglione Olona
7,582 residents at the 2021 census, 2,022 buildings and 6.9 km² of territory, Lombardia.
Castiglione Olona is in seismic zone 4: the least hazardous zone: the probability of an earthquake is very low. According to ISPRA’s mosaic, 0% of the territory of Castiglione Olona has high or very high landslide hazard (P3 and P4), with 0% of the residents. 1.3% of the territory of Castiglione Olona is in the flood area of the medium-probability scenario (P2), with 0.3% of the residents.
Find your address in Castiglione Olona
The preview is free: the parcel, the seismic zone and the types of flags. The full dossier costs €29 including applicable VAT.
Castiglione Olona compared
| ISPRA indicator | Castiglione Olona | VA | Lombardia |
|---|---|---|---|
| Landslide, very high hazard (P4) | 0% | 1.5% | 3.7% |
| Landslide, high hazard (P3) | 0% | 0.6% | 2.9% |
| Landslide, areas of attention | 0% | 0% | 0% |
| Residents in landslide areas P3-P4 | 0% | 0.3% | 0.4% |
| Buildings in landslide areas P3-P4 | 0% | 0.4% | 1.1% |
| Flood, high probability (P3) | 1.3% | 10.8% | 7.9% |
| Flood, medium probability (P2) | 1.3% | 13.1% | 10.2% |
| Flood, low probability (P1) | 7.9% | 16% | 20.3% |
| Residents in P2 flood areas | 0.3% | 2.2% | 4.4% |
| Buildings in P2 flood areas | 0.5% | 2.3% | 4.7% |
Questions
Which seismic zone is Castiglione Olona in?
Castiglione Olona is in seismic zone 4: the least hazardous zone: the probability of an earthquake is very low.
How much of Castiglione Olona is in landslide class P3/P4?
According to ISPRA’s mosaic, 0% of the territory of Castiglione Olona has high or very high landslide hazard (P3 and P4), with 0% of the residents. In the province of Varese, 60 of 136 municipalities have no territory with landslide hazard P3-P4.
How much of Castiglione Olona is in flood scenario P2?
1.3% of the territory of Castiglione Olona is in the flood area of the medium-probability scenario (P2), with 0.3% of the residents. By share of territory in the P2 flood area, Castiglione Olona ranks 96th of 136 municipalities in the province of Varese.
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 |
|---|---|---|---|
| Gornate Olona | 4 | 0% | 6.1% |
| Lozza | 4 | 0% | 5.4% |
| Vedano Olona | 4 | 0% | 15.8% |
| Venegono Superiore | 4 | 0% | 2.9% |
| Morazzone | 4 | 0% | 0% |
| Venegono Inferiore | 4 | 0% | 5.3% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on