Buying a home in Santa Marinella
18,531 residents at the 2021 census, 4,511 buildings and 49.2 km² of territory, Lazio.
Santa Marinella is in seismic zone 3 (the region uses the sub-zones 3B): in this zone strong earthquakes are less likely than in zones 1 and 2. According to ISPRA’s mosaic, 2.1% of the territory of Santa Marinella has high or very high landslide hazard (P3 and P4), with 3.8% of the residents. 3.8% of the territory of Santa Marinella is in the flood area of the medium-probability scenario (P2), with 13.4% of the residents.
Find your address in Santa Marinella
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Santa Marinella compared
| ISPRA indicator | Santa Marinella | RM | Lazio |
|---|---|---|---|
| Landslide, very high hazard (P4) | 1.1% | 2.1% | 4.3% |
| Landslide, high hazard (P3) | 1% | 0.6% | 1.2% |
| Landslide, areas of attention | 9.7% | 6.5% | 8.3% |
| Residents in landslide areas P3-P4 | 3.8% | 0.6% | 1.5% |
| Buildings in landslide areas P3-P4 | 3.8% | 1.2% | 3.2% |
| Flood, high probability (P3) | 1.7% | 3.4% | 2.6% |
| Flood, medium probability (P2) | 3.8% | 4.7% | 3.5% |
| Flood, low probability (P1) | 4.8% | 7% | 5.7% |
| Residents in P2 flood areas | 13.4% | 3.6% | 3.2% |
| Buildings in P2 flood areas | 12.7% | 4.5% | 3.4% |
Questions
Which seismic zone is Santa Marinella in?
Santa Marinella is in seismic zone 3 (the region uses the sub-zones 3B): in this zone strong earthquakes are less likely than in zones 1 and 2.
How much of Santa Marinella is in landslide class P3/P4?
According to ISPRA’s mosaic, 2.1% of the territory of Santa Marinella has high or very high landslide hazard (P3 and P4), with 3.8% of the residents. By share of territory with landslide hazard P3-P4, Santa Marinella ranks 53rd of 121 municipalities in the Metropolitan City of Roma.
How much of Santa Marinella is in flood scenario P2?
3.8% of the territory of Santa Marinella is in the flood area of the medium-probability scenario (P2), with 13.4% of the residents. By share of territory in the P2 flood area, Santa Marinella ranks 20th of 121 municipalities in the Metropolitan City of Roma.
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 |
|---|---|---|---|
| Tolfa | 3B | 2.8% | 1.1% |
| Allumiere | 3B | 3.1% | 0.1% |
| Civitavecchia | 3B | 0.9% | 1.1% |
| Cerveteri | 3B | 1.7% | 1.6% |
| Canale Monterano | 3B | 10.3% | 0% |
| Manziana | 3B | 1.9% | 0% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on