San Martino in Rio: what to know before buying a home
A municipality in the province of Reggio nell'Emilia, Emilia-Romagna. Official data on earthquakes, population, services and transport.
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Search for an address in San Martino in Rio
The report looks at the exact point: landslide and flood risk, seismic zone, price per square metre for the area, services and nearby stops.
For example: Via Roma 1, San Martino in Rio.
San Martino in Rio, a castle on the plain between Reggio and Carpi
Out on the plain between Reggio Emilia, Correggio and Carpi, San Martino in Rio can be spotted from a distance by its castle, the Rocca Estense, with its moat and tower. The castle houses, among other things, a museum of farming and rural life that tells the story of this area well. All around is Emilian farmland, with farms, rows of vines and small industrial zones on the edge of town.
People who buy here are usually looking for a house with a garden within a quarter of an hour of work: Reggio Emilia, Carpi and Correggio are close, and the area is full of engineering and food businesses. The centre is compact around the castle, while the housing developments of recent decades have spread out into the countryside. On flat land, the differences between one address and another are hard to see, but they exist, such as distance from canals and busy provincial roads.
The population is growing: 8,237 residents in 2023, up 6.0% on 2011. The estimated average age is 44.4 against 45.3 in the province, over-65s make up 21.1%, and households average 2.43 people. Foreign residents account for 9.0%. Average incomes match the high level of the province of Reggio Emilia.
On earthquakes, the zone alone can mislead. San Martino is in seismic zone 3 of the national classification, like 34 municipalities in the province, yet the expected ground acceleration in the built-up area is about 0.158 g, high for zone 3. For a 1970s detached house or a converted farm building, ask for the structural design and any seismic improvement work.
The Revenue Agency (Agenzia delle Entrate) cadastral maps are published, so the report identifies the plot. On a plain crossed by drainage canals, flood hazard varies from street to street and is read for the specific address.
Key points
- Este castle on the plain, a quarter of an hour from Reggio, Carpi and Correggio.
- Population up 6.0% since 2011.
- Seismic zone 3, but high expected acceleration: about 0.158 g.
- Drainage canals: flooding checked address by address.
Overview
San Martino in Rio is a municipality in the province of Reggio nell'Emilia, in Emilia-Romagna. At the end of 2023 it had 8,237 residents, ranked 21 of 42 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, San Martino in Rio is in seismic zone 3, a zone where strong earthquakes are possible but rare. Most municipalities in the province (34 of 42) are in the same zone.
In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.158 g, a medium-high value: the level with a 10% probability of being exceeded in 50 years, on rock.
Even in zone 3, seismic standards apply to new buildings: for an older building, ask about the design year and any structural work.
Population
Compared with the 2011 census, the resident population has grown by 6.0%. The estimated average age is 44 years, in line with the province. 21% of residents are over 65 (the regional figure is 25%). Foreign residents make up 9.0% of the population. On average, a household has 2.4 members.
Income and climate
In tax year 2024, taxpayers in San Martino in Rio declared an average taxable income of 27,018 euros, in line with the province (27,273 euros). The Italian average is 24,895 euros.
San Martino in Rio is in climate zone E, with 2,394 heating degree days: heating may be switched on from 15 October to 15 April, for up to 14 hours a day. The same table puts the town hall at 36 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, San Martino in Rio has 4 schools and 2 pharmacies. The Overture Maps data also lists 4 grocery shops and supermarkets, 5 healthcare facilities and 4 sports facilities.
There are 0.5 schools per 1,000 residents, fewer than the province average (0.8).
Public transport
We do not yet have open public transport timetables for this municipality: the report says so explicitly, without inventing distances.
How built-up it is
Buildings, roads, car parks and other sealed surfaces cover 16.6% of the land in San Martino in Rio, compared with 11.1% in the province and 9.0% in the region. In 2024 built-up land grew by 2.2 hectares.
Radon and contaminated sites
San Martino in Rio is not among the radon priority areas designated by the Regione Emilia-Romagna in 2026. Radon varies from building to building and can only be known by measuring it, especially on ground floors and in basements.
Official databases list no open contaminated sites in San Martino in Rio; one has been cleaned up or closed.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within San Martino in Rio: the report checks the address against the ISPRA maps.
House prices
The Revenue Agency's price ranges per square metre (OMI) apply to zones, not to whole municipalities: the report gives the range for the address's zone.
Land registry
The cadastral maps for San Martino in Rio are public: from the address the report finds the sheet and parcel number.
Liveability area by area
The Vicinalia liveability index runs from 0 to 100 and looks at the place, not the people who live there: services within walking distance, transport, green space, natural hazards, air, quiet, buildings and connection. Here it is worked out at the centre of each of the 46 inhabited census areas in San Martino in Rio. Half of the residents live in areas scoring 63 or more.
Residents by band
- modest 4.4%
- fair 55.6%
- good 40.0%
Vicinalia index by census area, licence CC BY-SA 4.0. Data: IdroGEO ISPRA (2026), Istat, INGV, EEA, AGCOM, Overture Maps and OpenStreetMap.
The colour is the value at the centre of the area. For an exact address, search for it above: the free check looks at that exact point. How the index is worked out
Data sources
- Seismic classification of municipalities, Dipartimento della Protezione Civile. Licence CC BY 4.0, updated to 2025-05.
- MPS04 seismic hazard model, INGV. Licence CC BY 4.0, 2004 model.
- Data by census section, Istat. Licence CC BY 4.0, residents at the end of 2023, compared with the 2011 census.
- Places, Overture Maps Foundation. Licence CDLA Permissive 2.0 and others depending on provider, release 2026-10-21.0.
- Income and main IRPEF variables by municipality, MEF, Dipartimento delle Finanze. Licence CC BY 3.0 IT, tax year 2024.
- Climate zones and heating degree days of municipalities (Presidential Decree 412/1993, Annex A), Normattiva. Licence CC BY 4.0, current text.
- Land take, territorial dynamics and ecosystem services, ISPRA e SNPA. Licence CC BY 4.0, 2024 data.
- Predictive radon map by municipality, ISPRA. Licence CC BY 4.0, version 2022-11.
- Radon priority areas (Legislative Decree 101/2020), Regione Emilia-Romagna, national list compiled by ARPA Lombardia. Licence Atto pubblico (art. 5 L. 633/1941), 2026.
- Contaminated sites, ISPRA, MOSAICO - Banca dati nazionale dei siti oggetto di procedimento di bonifica. Licence CC BY 4.0, updated to 12 November 2026.
- Liveability index by census area, Vicinalia, from the data in the report sections. Licence CC BY-SA 4.0, worked out on 30 September 2026.
- List of Italian municipalities, Istat. Licence CC BY 4.0, updated to 21 February 2026.
ISTAT code 035037. The text on this page is generated automatically from the data.