San Giovanni Suergiu: what to know before buying a home
A municipality in the province of Sulcis Iglesiente, Sardegna. Official data on earthquakes, population, services and transport.
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Search for an address in San Giovanni Suergiu
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 Vittorio Emanuele 1, San Giovanni Suergiu.
San Giovanni Suergiu, the Sulcis plain on the road to Sant'Antioco
Anyone driving from Carbonia to the island of Sant'Antioco goes through San Giovanni Suergiu. The municipality covers the coastal plain of the Sulcis, in south-west Sardinia, a landscape of fields, ponds and lagoons reaching the causeway to the island. The town hall is less than twenty metres above sea level and the climate is mild, climate zone B, with short winters.
Besides the village there are several hamlets scattered across the countryside and towards the coast, and homes vary accordingly: low houses with courtyards in the village, farmhouses and villas outside it. For work and larger services, the reference town is Carbonia, a few kilometres away, then Iglesias and Cagliari. Sports facilities stand out in the data, 10 in total, 1.78 per 1,000 residents against 0.83 in the province; places to eat out, on the other hand, are few.
Like much of the Sulcis, the town is losing people: 5,621 residents in 2023, down 6.6% on 2011 according to Istat, the national statistics office. It ranks 6 by population among the 24 municipalities in the province. The average age is 50.3 and over-65s are 31.6%, close to the provincial figures (50.6 years, 31.0%). Foreign residents are very few, 1.3%, and average incomes match those of the province.
Earthquakes are not a concern here: the whole province is in seismic zone 4 and the expected ground acceleration is about 0.050 g. In houses near the ponds and lagoons, damp matters more, both rising from the ground and carried by the sea wind.
In the low-lying areas near ponds and canals, flood hazard varies a lot from one plot to the next and is checked for the address. The Revenue Agency (Agenzia delle Entrate) publishes the cadastral maps, and the report traces the plot.
Key points
- Coastal plain of the Sulcis, between Carbonia and the Sant'Antioco causeway.
- Population down 6.6% since 2011, over-65s at 31.6%.
- Seismic zone 4, like the whole province.
- Mild climate; check for damp near the lagoons.
Overview
San Giovanni Suergiu is a municipality in the province of Sulcis Iglesiente, in Sardegna. At the end of 2023 it had 5,621 residents, ranked 6 of 24 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, San Giovanni Suergiu is in seismic zone 4, the lowest-risk zone, where strong earthquakes are very rare. All 24 municipalities in the province are in the same zone.
In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.050 g, a moderate value: the level with a 10% probability of being exceeded in 50 years, on rock.
In zone 4 the risk is low, but for an older building it is still worth asking about the state of the structure.
Population
Compared with the 2011 census, the resident population has fallen by 6.6%. The estimated average age is 50 years, in line with the province. 32% of residents are over 65 (the regional figure is 27%). Foreign residents make up 1.3% of the population. On average, a household has 2.3 members.
Income and climate
In tax year 2024, taxpayers in San Giovanni Suergiu declared an average taxable income of 19,047 euros, in line with the province (19,085 euros). The Italian average is 24,895 euros.
San Giovanni Suergiu is in climate zone B, with 766 heating degree days: heating may be switched on from 1 December to 31 March, for up to 8 hours a day. The same table puts the town hall at 17 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, San Giovanni Suergiu has 4 schools and 2 pharmacies. The Overture Maps data also lists 4 grocery shops and supermarkets, 3 healthcare facilities and 10 sports facilities.
There are 0.7 schools per 1,000 residents, fewer than the province average (1.1).
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 4.5% of the land in San Giovanni Suergiu, compared with 3.4% in the region. In 2024 built-up land grew by 2.5 hectares.
Radon and contaminated sites
San Giovanni Suergiu is not among the radon priority areas designated by the Regione Sardegna in 2022. Radon varies from building to building and can only be known by measuring it, especially on ground floors and in basements.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within San Giovanni Suergiu: 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 Giovanni Suergiu 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 47 inhabited census areas in San Giovanni Suergiu. Half of the residents live in areas scoring 69 or more.
Residents by band
- fair 14.6%
- good 70.8%
- very good 14.6%
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 Sardegna, national list compiled by ARPA Lombardia. Licence Atto pubblico (art. 5 L. 633/1941), 2022.
- 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 119017. The text on this page is generated automatically from the data.