Priolo Gargallo: what to know before buying a home
A municipality in the province of Siracusa, Sicilia. Official data on earthquakes, population, services and transport.
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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 Palestro 1, Priolo Gargallo.
Priolo Gargallo, between salt marshes and the petrochemical works
Priolo Gargallo lies on the east coast of Sicily between Syracuse and Augusta, some fifteen kilometres north of the provincial capital. Two very different landscapes share its territory. One is part of the large petrochemical complex that lines the coast up to Augusta and Melilli; the other is the Saline di Priolo nature reserve, a wetland where flamingos stop over in winter. On the Magnisi peninsula lies the archaeological site of Thapsos, a Bronze Age village.
If you are thinking of buying here, proximity to the plants is the first thing to weigh up. The industrial area around Priolo, Augusta and Melilli is one of Italy's national priority sites for environmental clean-up, and air quality has been a live issue for decades. At the same time, industry is the main employer in the area, and Syracuse is a short drive down the main road.
In 2023 the population was 11,233, down 7.7% on 2011 according to Istat, the national statistics office. Residents are slightly younger than the provincial average, with an average age of 44.4 against 45.4 and over-65s at 21.6%. Foreign residents are just 1.6%. Average declared incomes are close to those of the province of Syracuse, slightly higher.
Earthquake hazard here is at the top of the scale. Priolo is in seismic zone 1, the highest in the Civil Protection Department's classification, like 17 of the 21 municipalities in the province, and the expected ground acceleration in the built-up area reaches about 0.247 g. South-eastern Sicily has a long history of destructive earthquakes, starting with the one in 1693 that levelled the Val di Noto. If you are buying a flat, ask when the structural design was done, whether the building was engineered to seismic standards and whether a vulnerability assessment exists.
The climate is hot and dry. In low-lying areas near the salt pans and the gullies running to the sea, flood hazard needs checking at the individual address, which the report does with the official maps. The Revenue Agency (Agenzia delle Entrate) cadastral maps are available.
Key points
- Between Syracuse and Augusta, next to the petrochemical complex.
- Saline di Priolo nature reserve and the Thapsos archaeological site.
- Seismic zone 1, expected acceleration 0.247 g.
- Population down 7.7% since 2011.
Overview
Priolo Gargallo is a municipality in the province of Siracusa, in Sicilia. At the end of 2023 it had 11,233 residents, ranked 12 of 21 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, Priolo Gargallo is in seismic zone 1, the highest-risk zone, where very strong earthquakes are possible. Most municipalities in the province (17 of 21) are in the same zone.
In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.247 g, a medium-high value: the level with a 10% probability of being exceeded in 50 years, on rock.
For anyone buying in Priolo Gargallo, the building matters a great deal: ask for the design year, whether it met the 2008 seismic standards, and whether any seismic retrofit has been carried out.
Population
Compared with the 2011 census, the resident population has fallen by 7.7%. The estimated average age is 44 years, in line with the province. 22% of residents are over 65 (the regional figure is 23%). Foreign residents make up 1.6% of the population. On average, a household has 2.4 members.
Income and climate
In tax year 2024, taxpayers in Priolo Gargallo declared an average taxable income of 20,818 euros, in line with the province (20,509 euros). The Italian average is 24,895 euros.
Priolo Gargallo is in climate zone B, with 838 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 30 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Priolo Gargallo has 12 schools and 4 pharmacies. The Overture Maps data also lists 5 grocery shops and supermarkets, 4 healthcare facilities, 10 sports facilities and 2 parks and green areas.
There are 0.4 healthcare facilities per 1,000 residents, fewer than the province average (0.6).
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 23.2% of the land in Priolo Gargallo, compared with 9.2% in the province and 6.6% in the region. In 2024 built-up land grew by 8.3 hectares.
Radon and contaminated sites
According to the ISPRA map, the estimated radon emission in the municipality is low. 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 Priolo Gargallo; 3 have been cleaned up or closed.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within Priolo Gargallo: 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 Priolo Gargallo 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 Priolo Gargallo. Half of the residents live in areas scoring 60 or more.
Residents by band
- modest 0.0%
- fair 100.0%
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.
- 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 089021. The text on this page is generated automatically from the data.