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Province of Alessandria

Natural hazards and seismic zone municipality by municipality, for home buyers.

According to ISPRA’s mosaic, 6.6% of the territory of the province of Alessandria has high or very high landslide hazard (P3 and P4), with 1.1% of the residents. 11.9% of the territory of the province of Alessandria is in the flood area of the medium-probability scenario (P2), with 3.2% of the residents. Among Italy’s 107 provinces it ranks 52nd for landslide hazard P3-P4 and 33rd for flood area (P2).

Municipalities by seismic zone: 127 in zone 3, 60 in zone 4.

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Municipalities by share of territory in landslide class P3/P4

Vignale Monferrato45.9%
Cabella Ligure43%
Montacuto40.8%
Cantalupo Ligure35.6%
Fabbrica Curone35.2%
Cerreto Grue30.6%
Mongiardino Ligure29.5%
San Giorgio Monferrato27.2%
Rocchetta Ligure27.1%
Avolasca26.1%

Municipalities by share of territory in flood scenario P2

Bozzole93%
Valmacca68.8%
Isola Sant’Antonio66.9%
Bassignana59.2%
Frassineto Po55.7%
Rivarone54.4%
Pietra Marazzi53.5%
Montecastello50.7%
Solero48.2%
Coniolo40.5%

All 187 municipalities

MunicipalitySeismic zoneLandslide P3-P4Flood P2
Acqui Terme34.2%7.4%
Albera Ligure323.8%3.1%
Alessandria30.3%17.8%
Alfiano Natta48.7%1.1%
Alice Bel Colle314.7%0.5%
Alluvioni Piovera30%12.3%
Altavilla Monferrato40.4%1.8%
Alzano Scrivia30%28.5%
Arquata Scrivia31.6%7.6%
Avolasca326.1%3.2%
Balzola40%17.6%
Basaluzzo30%21.6%
Bassignana40.2%59.2%
Belforte Monferrato31.8%4.1%
Bergamasco40.8%16.9%
Berzano di Tortona36.2%0%
Bistagno37%7.6%
Borghetto di Borbera33.6%7.9%
Borgo San Martino40%16.8%
Borgoratto Alessandrino30%3.3%
Bosco Marengo30%2.4%
Bosio311.3%1.3%
Bozzole40%93%
Brignano-Frascata315.4%5.7%
Cabella Ligure343%2.4%
Camagna Monferrato413.3%9.3%
Camino415.2%16.9%
Cantalupo Ligure335.6%2.9%
Capriata d’Orba30%26.3%
Carbonara Scrivia30%12.9%
Carentino40%2.5%
Carezzano312.9%2.6%
Carpeneto30.5%5.4%
Carrega Ligure319.6%1%
Carrosio38%6.7%
Cartosio31.9%5.6%
Casal Cermelli30%25.2%
Casale Monferrato49.3%22.9%
Casaleggio Boiro315.8%1.8%
Casalnoceto31.8%6.2%
Casasco321.4%3.1%
Cassano Spinola37.8%21.4%
Cassine37.6%22.7%
Cassinelle32.5%0.5%
Castellania Coppi38.3%0.2%
Castellar Guidobono31.4%6.8%
Castellazzo Bormida30%33.5%
Castelletto d’Erro316.9%0%
Castelletto d’Orba30.5%6%
Castelletto Merli44.1%4.1%
Castelletto Monferrato41.1%4.1%
Castelnuovo Bormida30%28.8%
Castelnuovo Scrivia30%27.2%
Castelspina30%3.9%
Cavatore313.5%0.1%
Cella Monte41.1%6.9%
Cereseto46.8%17.8%
Cerreto Grue330.6%2.8%
Cerrina Monferrato411.2%6.7%
Coniolo411.9%40.5%
Conzano40.4%7.3%
Costa Vescovato37.6%5.3%
Cremolino35.8%6.5%
Denice36.3%12%
Dernice319.2%0.5%
Fabbrica Curone335.2%1.7%
Felizzano40%28.9%
Fraconalto38.1%0.4%
Francavilla Bisio30.7%32.8%
Frascaro30.1%5.8%
Frassinello Monferrato41.3%10%
Frassineto Po40%55.7%
Fresonara30%9.2%
Frugarolo30%9.2%
Fubine Monferrato40.4%15.7%
Gabiano48.9%14.9%
Gamalero31.6%10.3%
Garbagna37%2.9%
Gavi32.9%5.9%
Giarole40%26.6%
Gremiasco35%6.7%
Grognardo37.7%2.4%
Grondona311.1%4.1%
Guazzora30%17.3%
Isola Sant’Antonio30%66.9%
Lerma311.7%6.1%
Lu e Cuccaro Monferrato41.5%3.5%
Malvicino37.2%1.1%
Masio40.9%34.1%
Melazzo315.4%14.5%
Merana34.2%4.7%
Mirabello Monferrato40%4.5%
Molare33.3%4.5%
Molino dei Torti30%29.2%
Mombello Monferrato48.8%5.8%
Momperone310.3%7.2%
Moncestino411.5%30.2%
Mongiardino Ligure329.5%1.3%
Monleale312%2.8%
Montacuto340.8%0.2%
Montaldeo31.9%0%
Montaldo Bormida33.2%0.2%
Montecastello36%50.7%
Montechiaro d’Acqui33.8%0.6%
Montegioco36.5%7.7%
Montemarzino39%2.4%
Morano sul Po40%20.8%
Morbello33.1%0.4%
Mornese31.7%0.2%
Morsasco38.9%0.9%
Murisengo410.3%6.2%
Novi Ligure30.9%3.5%
Occimiano40.2%23.3%
Odalengo Grande44.7%5.3%
Odalengo Piccolo413.7%0%
Olivola43.9%6.4%
Orsara Bormida33.2%0.6%
Ottiglio43.2%5.2%
Ovada39.8%7.7%
Oviglio40%29.4%
Ozzano Monferrato424.9%6.7%
Paderna31.5%0%
Pareto32.4%1.5%
Parodi Ligure31.9%7.4%
Pasturana30.1%0%
Pecetto di Valenza41.9%1.8%
Pietra Marazzi38.7%53.5%
Pomaro Monferrato40%29.3%
Pontecurone30%27.2%
Pontestura411%29.9%
Ponti317.1%7%
Ponzano Monferrato47.7%0.1%
Ponzone32.8%0.8%
Pozzol Groppo325.2%0.3%
Pozzolo Formigaro30%4.2%
Prasco31.9%4.4%
Predosa30%13.7%
Quargnento40.5%0%
Quattordio40%2%
Ricaldone35.1%0.6%
Rivalta Bormida33%20.7%
Rivarone31.9%54.4%
Rocca Grimalda32.8%2%
Roccaforte Ligure323.2%1.5%
Rocchetta Ligure327.1%12.4%
Rosignano Monferrato43.2%1.9%
Sala Monferrato43.1%0%
Sale30%3.8%
San Cristoforo310.6%15.1%
San Giorgio Monferrato427.2%0.9%
San Salvatore Monferrato41.6%5.3%
San Sebastiano Curone36.9%8.4%
Sant’Agata Fossili313.5%0%
Sardigliano35.5%7.8%
Sarezzano310.4%6.9%
Serralunga di Crea42.4%18%
Serravalle Scrivia30%7%
Sezzadio30.1%18.3%
Silvano d’Orba34.2%23.1%
Solero40%48.2%
Solonghello41.8%1.8%
Spigno Monferrato32.9%7.4%
Spineto Scrivia33.6%2.4%
Stazzano310.2%7.9%
Strevi30.7%24.5%
Tagliolo Monferrato315.3%0.3%
Tassarolo311.4%0.4%
Terruggia41%0.4%
Terzo38.3%13.9%
Ticineto40%19.7%
Tortona30.6%13.3%
Treville46.7%0%
Trisobbio32.7%1.4%
Valenza40.5%20.3%
Valmacca40%68.8%
Vignale Monferrato445.9%6.5%
Vignole Borbera31.1%14.8%
Viguzzolo35.7%20.4%
Villadeati414.7%0.7%
Villalvernia30%31.8%
Villamiroglio41.8%0.2%
Villanova Monferrato40%4.9%
Villaromagnano33.9%5.2%
Visone30.6%18.3%
Volpedo33.8%4.6%
Volpeglino32.1%6.2%
Voltaggio35%0.8%

Landslides and floods in the province

ISPRA indicatorALPiemonte
Landslide, very high hazard (P4)2.7%3.1%
Landslide, high hazard (P3)3.9%3.7%
Landslide, areas of attention0%0%
Residents in landslide areas P3-P41.1%1.8%
Buildings in landslide areas P3-P43.8%4.4%
Flood, high probability (P3)9.2%5.1%
Flood, medium probability (P2)11.9%8.3%
Flood, low probability (P1)19.5%13%
Residents in P2 flood areas3.2%4.9%
Buildings in P2 flood areas4%5.8%

Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).

Updated on