Living in Castelvetrano
In Castelvetrano, rent averages €3.10 per m² a month (2025) and unemployment is 14.8% (2023).
At the start of 2026, the city covered 207.7 km² and had a population density of 141.3 people per km². The foreign population count was 1,940 at the start of 2026.
Higher unemployment than 96% of Italian cities that publish it, less recorded crime than any other Italian city that publishes it and cleaner air than 98% of Italian cities that publish it.
Which Italy-wide rules apply when you move to Castelvetrano?
National rules stay on the country page instead of being relabelled as city data.
Housing and cost
How much does it cost to rent in Castelvetrano?
Average net cold rent is 3.1 EUR/m² per month (2025-S2), excluding heating and operating charges.
Published average over existing tenancies; a specific flat can sit either side of it. Asking-rent series, where present, are separate rows in the table.
- Average net rent (nettokalt): 3.1 EUR/m²/month · Collected source1
| Metric | Value | Period | Source |
|---|---|---|---|
| Internet, 60 Mbps unlimited | 29.9 EUR/month | 30 Sept 2026 | iliadbox fixed fibre4Official · national market |
| Mobile plan, 10 GB | 11.99 EUR/month | 30 Sept 2026 | iliad GIGA mobile tariff3Official · national market |
| Dwellings | 23,394 dwellings | 31 Dec 2021 | Istat (Italian National Institute of Statistics)6Official |
| Main residence dwellings | 13,668 dwellings | 31 Dec 2021 | Istat (Italian National Institute of Statistics)7Official |
| Average net rent (nettokalt) | 3.1 EUR/m²/month | 31 Dec 2025 | Collected source1Official · municipality zone median |
Is Castelvetrano a good place to live?
There is no universal answer. The profile scores below show who the available published evidence may suit; they are a decision aid, not a personal recommendation.
Worked out from these numbers
What does a 60 m² flat cost?
About 186 EUR a month in cold rent at the published average of 3.1 EUR/m² per month, before heating and operating charges.
Heating, water and operating charges come on top, and a specific flat can sit either side of an average.
Work and income
What is the unemployment rate in Castelvetrano?
The unemployment rate is about 14.8 % (2023).
- Unemployment rate: 14.75 % · Istituto Nazionale di Statistica (ISTAT)13
Castelvetrano 14.8%
Unemployment rate (%)
| Metric | Value | Period | Source |
|---|---|---|---|
| People in employment | 9,095 people | 31 Dec 2021 | Istat (Italian National Institute of Statistics)8Official |
| Median gross salary (regional) | 1,292 EUR/month | 31 Dec 2024 | servizi2.inps.it23Official |
| Unemployment rate | 14.75 %country median 6.0% | 31 Dec 2023 | Istituto Nazionale di Statistica (ISTAT)13Official |
What does a salary buy in Castelvetrano?
Take-home pay after tax, minus rent and the everyday bills this city publishes. Each line names its source.
RentInternetMobile
Line-by-line breakdown and sources
| Each month | € |
|---|---|
| Take-home payOECD Taxing Wages 2025, single, no children. Includes central and local income tax and employee social contributions. | outside the model's range |
| Rent, 60 m²€3.10/m² · official · Collected source · 2025-12-31 | − €186 |
| Internet€30 · official · iliadbox fixed fibre · 2026-09-30 | − €30 |
| Mobile plan€12 · official · iliad GIGA mobile tariff · 2026-09-30 | − €12 |
| Other everyday billsnot published for this city: public transport pass, utilities | — |
| Left overbefore the bills this city does not publish | — |
Public employment service
No exact public employment office is currently linked to Castelvetrano. The verified national service may still offer online registration, job search or an official office finder.
Centri per l'impiego — Public employment service
Country-level service information is not treated as proof of a physical office in Castelvetrano. Sources checked through 10 Aug 2026.
Family and education
| Metric | Value | Period | Source |
|---|---|---|---|
| Primary schools | 8 count | 3 Aug 2026 | Ministero dell'Istruzione e del Merito (dati.istruzione.it)16Official |
| Schools | 38 count | 3 Aug 2026 | Ministero dell'Istruzione e del Merito (dati.istruzione.it)16Official |
School for children who move here. School is compulsory from age 6 to 16, and public school is free. Newly arrived pupils get support in the school language: Italian L2 laboratories and support for foreign pupils (DPR 394/1999 art 45 route). How to enrol a child (istruzione.it).
A country-wide rule for Italy; Castelvetrano's school authority applies it locally.
Sources: eurydice.eacea.ec.europa.eu · 2026.
Safety
How safe is Castelvetrano?
Police recorded about 3,052 incidents per 100,000 (2024). This counts all offences, so it is not comparable with a violent-crime-only rate from another source. Source: Tasso di delittuosità - prov24
| Metric | Value | Period | Source |
|---|---|---|---|
| Recorded incidents per 100,000 residents | 3,052 incidents per 100,000 | 31 Dec 2024 | Tasso di delittuosità - prov24Official · county |
Mobility and administration
Language courses and integration
No exact city-level course record is currently published for Castelvetrano. These verified national programmes may still apply; use the official programme page to check local availability.
CPIA public Italian-language and orientation courses for foreign adults — State Language Course
Italian public adult-education system — Centri Provinciali per l'Istruzione degli Adulti
For foreign adults, people seeking Italian language and culture courses.
L.O.R.R. — Language, Orientation, Recognition and Networks with CPIA — Job-related language course
Italian Ministry of Labour and Social Policies / FAMI 2021-2027 programme
For third-country nationals, vulnerable migrants, unaccompanied minors.
Climate and air quality
Is the air quality good in Castelvetrano?
The annual PM2.5 mean is about 7.4 µg/m³ (2024) — above the WHO 2021 guideline of 5 µg/m³ but within the EU limit of 25 µg/m³.
Annual mean at the measuring site(s) serving the city; current-day readings differ.
- PM2.5 — annual mean: 7.42 µg/m³ · EEA Air Quality Statistics — PM2.5 annual mean2
Within WHO 2021 guidelineAbove WHO, within EU limitAbove EU legal limitCity annual mean · µg/m³
City values from the published air-quality observations. WHO 2021 guidelines and EU limit values are published constants.
Castelvetrano 7.4
Annual PM2.5 (µg/m³)
| Metric | Value | Period | Source |
|---|---|---|---|
| PM2.5 — annual mean | 7.42 µg/m³ | 31 Dec 2024 | EEA Air Quality Statistics — PM2.5 annual mean2Official · nearest-station reading |
| Monthly extreme high temperature | Jan 17.1 · Feb 16.43 · Mar 17.91 · Apr 20.58 · May 24.27 · Jun 29.04 · Jul 30.9 · Aug 32.04 · Sep 29.14 · Oct 25.97 · Nov 23.45 · Dec 19.51 °C | 31 Dec 2001 | NASA POWER / NASA Langley Research Center17Official |
| Monthly extreme low temperature | Jan 8.25 · Feb 8.04 · Mar 8.09 · Apr 10.32 · May 13.51 · Jun 16.53 · Jul 20.18 · Aug 21.93 · Sep 19.55 · Oct 14.74 · Nov 11.18 · Dec 6.72 °C | 31 Dec 2001 | NASA POWER / NASA Langley Research Center17Official |
| Average temperature by month | Jan 13.63 · Feb 13.06 · Mar 13.93 · Apr 15.57 · May 18.13 · Jun 21.83 · Jul 24.91 · Aug 25.77 · Sep 23.95 · Oct 21.42 · Nov 18.25 · Dec 15.13 °C | 31 Dec 2001 | NASA POWER / NASA Langley Research Center17Official |
Population and city profile
How many people live in Castelvetrano?
The published population was 29,297 people in 2025. Source: ISTAT municipality population and citizenship tables 202511
By nationality
National passport93.4%
Calculated from the population and foreign-resident facts on this page.
| Metric | Value | Period | Source |
|---|---|---|---|
| Cars per 1,000 residents | 768.3 cars/1000 residents | 31 Dec 2023 | IstatData / ACI Pubblico registro automobilistico12Official |
| City area | 207.7 km² | 2026 | Official SITUAS report 74 (Comuni - Dimensione): exact municipality surface in km2, with annual area vintage.19Official |
| Foreign residents | 1,940 people | 1 Jan 2026 | Official ISTAT STRASA estimate of resident foreign population by municipality at 1 January 2026; Età=999 is the total.18Official |
| Population density | 141.3 people/km² | 1 Jan 2026 | Official SITUAS report 74 (Comuni - Dimensione): exact municipality surface in km2, with annual area vintage.20Official |
| Female residents | 14,929 people | 31 Dec 2024 | Istat (Italian National Institute of Statistics)5Official |
| Male residents | 14,368 people | 31 Dec 2024 | Istat (Italian National Institute of Statistics)5Official |
| Population | 29,297 people | 1 Jan 2025 | ISTAT municipality population and citizenship tables 202511Official |
Population fell 4.9% between 2018 and 2025, from 30,806 to 29,297.
International community in Castelvetrano
Named groups from exact city-grain official distributions. Citizenship, birthplace, language and ancestry answer different questions and stay separate.
Country of birth
Resident population in Italy at 1 January 2025; source-native country dimension; total sex · 2025-01-01
| Published group | People | Share |
|---|---|---|
| Derived source total (sum of all published country rows) | 29,297 | 100.0% |
| Italia | 26,823 | 91.6% |
| Tunisia | 642 | 2.2% |
| Romania | 288 | 1.0% |
| Germania | 284 | 1.0% |
| Svizzera | 199 | 0.7% |
| Nigeria | 100 | 0.3% |
| Venezuela | 95 | 0.3% |
| Marocco | 81 | 0.3% |
| Bangladesh | 75 | 0.3% |
Show 71 more groups
| Published group | People | Share |
|---|---|---|
| Gambia | 65 | 0.2% |
| Cina | 53 | 0.2% |
| Regno Unito | 46 | 0.2% |
| Somalia | 44 | 0.2% |
| Francia | 43 | 0.1% |
| Argentina | 37 | 0.1% |
| Senegal | 36 | 0.1% |
| Egitto | 34 | 0.1% |
| Pakistan | 29 | 0.1% |
| Stati Uniti d'America | 25 | 0.1% |
| Federazione russa | 21 | 0.1% |
| Brasile | 19 | 0.1% |
| Belgio | 18 | 0.1% |
| Polonia | 18 | 0.1% |
| Ghana | 16 | 0.1% |
| Mali | 15 | 0.1% |
| Australia | 13 | 0.0% |
| Costa d'Avorio | 12 | 0.0% |
| Spagna | 11 | 0.0% |
| Guinea | 11 | 0.0% |
| Ucraina | 10 | 0.0% |
| Algeria | 10 | 0.0% |
| Libia | 9 | 0.0% |
| Eritrea | 8 | 0.0% |
| Ungheria | 7 | 0.0% |
| Cuba | 7 | 0.0% |
| Albania | 6 | 0.0% |
| Colombia | 6 | 0.0% |
| Bulgaria | 5 | 0.0% |
| Bielorussia | 5 | 0.0% |
| Guinea-Bissau | 4 | 0.0% |
| Austria | 3 | 0.0% |
| Iraq | 3 | 0.0% |
| Siria | 3 | 0.0% |
| Etiopia | 3 | 0.0% |
| Ecuador | 3 | 0.0% |
| Portogallo | 2 | 0.0% |
| Slovacchia | 2 | 0.0% |
| Repubblica ceca | 2 | 0.0% |
| Serbia | 2 | 0.0% |
| Filippine | 2 | 0.0% |
| India | 2 | 0.0% |
| Iran | 2 | 0.0% |
| Turchia | 2 | 0.0% |
| Burkina Faso | 2 | 0.0% |
| Camerun | 2 | 0.0% |
| Kenya | 2 | 0.0% |
| Niger | 2 | 0.0% |
| Togo | 2 | 0.0% |
| Canada | 2 | 0.0% |
| El Salvador | 2 | 0.0% |
| Messico | 2 | 0.0% |
| Paraguay | 2 | 0.0% |
| Danimarca | 1 | 0.0% |
| Grecia | 1 | 0.0% |
| Lussemburgo | 1 | 0.0% |
| Malta | 1 | 0.0% |
| Estonia | 1 | 0.0% |
| Moldova | 1 | 0.0% |
| Afghanistan | 1 | 0.0% |
| Sri Lanka | 1 | 0.0% |
| Palestina | 1 | 0.0% |
| Giappone | 1 | 0.0% |
| Kazakhstan | 1 | 0.0% |
| Benin | 1 | 0.0% |
| Mauritania | 1 | 0.0% |
| Sierra Leone | 1 | 0.0% |
| Sudan | 1 | 0.0% |
| Repubblica Dominicana | 1 | 0.0% |
| Honduras | 1 | 0.0% |
| Perù | 1 | 0.0% |
Largest published groups; zero-count groups are omitted. Dimensions are source-native and are never merged. Official source15
Citizenship
Resident population in Italy at 1 January 2025; source-native country dimension; total sex · 2025-01-01
| Published group | People | Share |
|---|---|---|
| Derived source total (sum of all published country rows) | 29,297 | 100.0% |
| Italia | 27,585 | 94.2% |
| Tunisia | 632 | 2.2% |
| Romania | 291 | 1.0% |
| Nigeria | 132 | 0.5% |
| Cina | 75 | 0.3% |
| Marocco | 69 | 0.2% |
| Bangladesh | 66 | 0.2% |
| Gambia | 65 | 0.2% |
| Somalia | 40 | 0.1% |
Show 59 more groups
| Published group | People | Share |
|---|---|---|
| Senegal | 35 | 0.1% |
| Egitto | 33 | 0.1% |
| Pakistan | 30 | 0.1% |
| Germania | 26 | 0.1% |
| Federazione russa | 15 | 0.1% |
| Ghana | 15 | 0.1% |
| Mali | 15 | 0.1% |
| Francia | 14 | 0.0% |
| Venezuela | 14 | 0.0% |
| Argentina | 12 | 0.0% |
| Polonia | 11 | 0.0% |
| Costa d'Avorio | 11 | 0.0% |
| Guinea | 11 | 0.0% |
| Regno Unito | 6 | 0.0% |
| Algeria | 6 | 0.0% |
| Guinea-Bissau | 5 | 0.0% |
| Cuba | 5 | 0.0% |
| Albania | 4 | 0.0% |
| Svizzera | 4 | 0.0% |
| Ungheria | 4 | 0.0% |
| Bielorussia | 4 | 0.0% |
| Eritrea | 4 | 0.0% |
| Colombia | 4 | 0.0% |
| Ucraina | 3 | 0.0% |
| Iraq | 3 | 0.0% |
| Brasile | 3 | 0.0% |
| Austria | 2 | 0.0% |
| Belgio | 2 | 0.0% |
| Spagna | 2 | 0.0% |
| Repubblica ceca | 2 | 0.0% |
| Afghanistan | 2 | 0.0% |
| Filippine | 2 | 0.0% |
| India | 2 | 0.0% |
| Burkina Faso | 2 | 0.0% |
| Camerun | 2 | 0.0% |
| Kenya | 2 | 0.0% |
| Niger | 2 | 0.0% |
| Togo | 2 | 0.0% |
| Danimarca | 1 | 0.0% |
| Malta | 1 | 0.0% |
| Paesi Bassi | 1 | 0.0% |
| Portogallo | 1 | 0.0% |
| Svezia | 1 | 0.0% |
| Estonia | 1 | 0.0% |
| Slovacchia | 1 | 0.0% |
| Serbia | 1 | 0.0% |
| Sri Lanka | 1 | 0.0% |
| Palestina | 1 | 0.0% |
| Giappone | 1 | 0.0% |
| Iran | 1 | 0.0% |
| Siria | 1 | 0.0% |
| Benin | 1 | 0.0% |
| Libia | 1 | 0.0% |
| Mauritania | 1 | 0.0% |
| Sierra Leone | 1 | 0.0% |
| Sudan | 1 | 0.0% |
| Stati Uniti d'America | 1 | 0.0% |
| Paraguay | 1 | 0.0% |
| Apolide | 1 | 0.0% |
Largest published groups; zero-count groups are omitted. Dimensions are source-native and are never merged. Official source14
Additional context
Alternatives for people set on Castelvetrano
Three places for the three reasons people leave a city on the shortlist: stay in the region, stay in the country, or keep the budget and change the country. A percentage appears only where both cities publish that metric from the same source, period and grain. Distances are straight lines — travel times are not collected yet.
Santa Margherita di Belice as a Castelvetrano alternative in the same region
20 km away, better on 3 of 6 metrics measured the same way, worse on 1.
- Rent: €1.50/m² Santa Margherita di Belice vs €3.10/m² Castelvetrano−52%
- Residents: 5,978 Santa Margherita di Belice vs 29,297 Castelvetrano−80%
- Unemployment: 11.8% Santa Margherita di Belice vs 14.8% Castelvetrano−20%
- Recorded crime, per 100k: 2,476 Santa Margherita di Belice vs 3,052 Castelvetrano−19%
- Nearest airport: 52.0 km Santa Margherita di Belice vs 37.0 km Castelvetrano+41%
- Median gross pay, region: €1,316 Santa Margherita di Belice vs €1,292 Castelvetranosame level
Gallarate as a Castelvetrano alternative in the same country
A move, not a commute, at 948 km, better on 3 of 6 metrics measured the same way, worse on 2.
- Rent: €4.55/m² Gallarate vs €3.10/m² Castelvetrano+47%
- Median gross pay, region: €2,253 Gallarate vs €1,292 Castelvetrano+74%
- Unemployment: 6.6% Gallarate vs 14.8% Castelvetrano−55%
- Nearest airport: 6.0 km Gallarate vs 37.0 km Castelvetrano−84%
- Residents: 52,902 Gallarate vs 29,297 Castelvetrano+81%
- Recorded crime, per 100k: 3,778 Gallarate vs 3,052 Castelvetrano+24%
Cities near Castelvetrano
Published cities within 25 km, nearest first. Distances are straight-line.
Alternative cities in Italy
Other cities in Italy to compare with Castelvetrano, nearest in population first.
How does Castelvetrano compare?
Pick a city. The answer appears here and the address bar keeps it, so the comparison can be shared; the page stays Castelvetrano's.
Castelvetrano in rankings
Yes — migrants can receive medical care in Castelvetrano when the national insurance or residence conditions are met.
Healthcare access follows the country-wide insurance rules; local capacity facts remain city data and are not used as proof of eligibility.
Open the official coverage guideCommon questions
Answered from the published values on this page, each with its source and date.
How many people live in Castelvetrano?
The published population was 29,297 people in 2025. Source: ISTAT municipality population and citizenship tables 2025.
How much does it cost to rent in Castelvetrano?
Average net cold rent is 3.1 EUR/m² per month (2025-S2), excluding heating and operating charges. For a 70 m² flat that is about 217 EUR a month before utilities. Source: Collected source.
Is the air quality good in Castelvetrano?
The annual PM2.5 mean is about 7.4 µg/m³ (2024) — above the WHO 2021 guideline of 5 µg/m³ but within the EU limit of 25 µg/m³. Source: EEA Air Quality Statistics — PM2.5 annual mean.
How safe is Castelvetrano?
Police recorded about 3,052 incidents per 100,000 (2024). This counts all offences, so it is not comparable with a violent-crime-only rate from another source. Source: Tasso di delittuosità - prov.
What is the unemployment rate in Castelvetrano?
The unemployment rate is about 14.8 % (2023). Source: Istituto Nazionale di Statistica (ISTAT).
What is the typical salary around Castelvetrano?
The median gross salary is 1,292 EUR/month. Source: servizi2.inps.it.
Is Castelvetrano a good place to live?
Castelvetrano may suit different people for different reasons. The page's profile scores compare published cost, work, housing, safety, healthcare and other available factors; they are a decision aid, not a universal recommendation.
Which cities are near Castelvetrano?
Campobello di Mazara, Partanna, Salemi, Menfi, Mazara del Vallo are near Castelvetrano. Typed relationship labels are shown where published; other rows use straight-line distance from admitted coordinates.
How many people born in Derived source total (sum of all published country rows) live in Castelvetrano?
The official country of birth distribution records 29,297 people (100.0%) in the source-defined population for 2025-01-01. This is a country of birth measure, not a general estimate of ethnicity or migration status.
Cite this page
Open a format to select or copy this ImmigrationDB compilation citation. The native disclosure and text fallback work without JavaScript.
APA citation
ImmigrationDB. (2026, October 16). Castelvetrano, Italy: population, rent, salary, jobs, safety [ImmigrationDB compilation; version 7e9835d31bd12538ebabaf8c5fd099f2]. ImmigrationDB. https://immigrationdb.com/cities/it/castelvetrano/ Retrieved 2026-10-16. Compilation license: CC BY 4.0, https://creativecommons.org/licenses/by/4.0/BibTeX citation
@misc{immigrationdb_immigrationdb_castelvetrano-italy-population-rent-salary-jobs-safety_129ef28ae8e5,
author = {ImmigrationDB},
title = {Castelvetrano, Italy: population, rent, salary, jobs, safety},
publisher = {ImmigrationDB},
year = {2026},
date = {2026-10-16},
version = {7e9835d31bd12538ebabaf8c5fd099f2},
url = {https://immigrationdb.com/cities/it/castelvetrano/},
note = {Retrieved 2026-10-16. ImmigrationDB compilation. Compilation license: CC BY 4.0, https://creativecommons.org/licenses/by/4.0/},
}Markdown citation
[Castelvetrano, Italy: population, rent, salary, jobs, safety](https://immigrationdb.com/cities/it/castelvetrano/) — ImmigrationDB; ImmigrationDB; version 7e9835d31bd12538ebabaf8c5fd099f2; retrieved 2026-10-16; built 2026-10-16.This citation identifies the ImmigrationDB compilation/page. Underlying source publishers and datasets retain their own terms; inspect the Sources section and cite those records separately. View the underlying source records.
Sources
- Collected source www1.agenziaentrate.gov.it · checked 2026-08-05
- EEA Air Quality Statistics — PM2.5 annual mean EEA Air Quality Statistics · discodata.eea.europa.eu · checked 2026-10-05
- iliad GIGA mobile tariff iliad.it · checked 2026-09-15
- iliadbox fixed fibre iliad.it · checked 2026-09-15
- Istat (Italian National Institute of Statistics) istat.it · checked 2026-08-07
- Istat (Italian National Institute of Statistics) esploradati.istat.it · checked 2026-08-07
- Istat (Italian National Institute of Statistics) esploradati.istat.it · checked 2026-08-07
- Istat (Italian National Institute of Statistics) esploradati.istat.it · checked 2026-08-07
- Istat (Italian National Institute of Statistics) istat.it · checked 2026-08-07
- Istat (Italian National Institute of Statistics) esploradati.istat.it · checked 2026-08-07
Show 22 more sources
- ISTAT municipality population and citizenship tables 2025 demo.istat.it · checked 2026-07-26
- IstatData / ACI Pubblico registro automobilistico istat.it · checked 2026-08-08
- Istituto Nazionale di Statistica (ISTAT) istat.it · checked 2026-08-04
- Istituto Nazionale di Statistica (Istat), Italy citizenship distribution demo.istat.it · checked 2026-08-28
- Istituto Nazionale di Statistica (Istat), Italy country of birth distribution demo.istat.it · checked 2026-08-28
- Ministero dell'Istruzione e del Merito (dati.istruzione.it) dati.istruzione.it · checked 2026-08-03
- NASA POWER / NASA Langley Research Center power.larc.nasa.gov · checked 2026-08-03
- Official ISTAT STRASA estimate of resident foreign population by municipality at 1 January 2026; Età=999 is the total. demo.istat.it · checked 2026-07-15
- Official SITUAS report 74 (Comuni - Dimensione): exact municipality surface in km2, with annual area vintage. situas-servizi.istat.it · checked 2026-07-15
- Official SITUAS report 74 (Comuni - Dimensione): exact municipality surface in km2, with annual area vintage. demo.istat.it · checked 2026-07-15
- OpenFlights raw.githubusercontent.com · checked 2026-08-03
- OurAirports davidmegginson.github.io · checked 2026-08-03
- servizi2.inps.it servizi2.inps.it · checked 2026-08-27
- Tasso di delittuosità - prov esploradati.istat.it · checked 2026-09-23
- Coordinate identity evidence wikidata.org · checked 2026-09-06
- Coordinate identity evidence wikidata.org · checked 2026-09-06
- Coordinate identity evidence wikidata.org · checked 2026-09-06
- Coordinate identity evidence wikidata.org · checked 2026-09-06
- Coordinate identity evidence wikidata.org · checked 2026-09-06
- Coordinate identity evidence wikidata.org · checked 2026-09-06
- Coordinate identity evidence wikidata.org · checked 2026-09-06
- Wikidata identity and coordinates — Q481775 Wikidata identity and coordinates · wikidata.org · checked 2026-09-05
Spotted a number that looks wrong? Every value here carries its source and date — tell us what you found and we will re-check it against the source.