Buying a home in Ponzano Romano
1,161 residents at the 2021 census, 529 buildings and 19.5 km² of territory, Lazio.
Ponzano Romano is in seismic zone 2 (the region uses the sub-zones 2B): in this zone strong earthquakes are possible. According to ISPRA’s mosaic, 1.4% of the territory of Ponzano Romano has high or very high landslide hazard (P3 and P4), with 4.7% of the residents. 30.5% of the territory of Ponzano Romano is in the flood area of the medium-probability scenario (P2), with 9.3% of the residents.
Find your address in Ponzano Romano
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Ponzano Romano compared
| ISPRA indicator | Ponzano Romano | RM | Lazio |
|---|---|---|---|
| Landslide, very high hazard (P4) | 0% | 2.1% | 4.3% |
| Landslide, high hazard (P3) | 1.4% | 0.6% | 1.2% |
| Landslide, areas of attention | 0% | 6.5% | 8.3% |
| Residents in landslide areas P3-P4 | 4.7% | 0.6% | 1.5% |
| Buildings in landslide areas P3-P4 | 1.1% | 1.2% | 3.2% |
| Flood, high probability (P3) | 29.3% | 3.4% | 2.6% |
| Flood, medium probability (P2) | 30.5% | 4.7% | 3.5% |
| Flood, low probability (P1) | 31.2% | 7% | 5.7% |
| Residents in P2 flood areas | 9.3% | 3.6% | 3.2% |
| Buildings in P2 flood areas | 11.3% | 4.5% | 3.4% |
Questions
Which seismic zone is Ponzano Romano in?
Ponzano Romano is in seismic zone 2 (the region uses the sub-zones 2B): in this zone strong earthquakes are possible.
How much of Ponzano Romano is in landslide class P3/P4?
According to ISPRA’s mosaic, 1.4% of the territory of Ponzano Romano has high or very high landslide hazard (P3 and P4), with 4.7% of the residents. By share of territory with landslide hazard P3-P4, Ponzano Romano ranks 60th of 121 municipalities in the Metropolitan City of Roma.
How much of Ponzano Romano is in flood scenario P2?
30.5% of the territory of Ponzano Romano is in the flood area of the medium-probability scenario (P2), with 9.3% of the residents. By share of territory in the P2 flood area, Ponzano Romano ranks 2nd 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 |
|---|---|---|---|
| Sant’Oreste | 2B | 2.2% | 5.1% |
| Stimigliano | 2B | 3% | 28.4% |
| Filacciano | 2B | 0.7% | 41.4% |
| Nazzano | 2B | 3.8% | 18.7% |
| Forano | 2B | 2.9% | 23.4% |
| Collevecchio | 2B | 4.2% | 4.8% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on