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Ardèche (07)

Le Teil: geology and natural hazards

What public services say about the ground beneath the commune (population 8,726) and the hazards it faces: natural disasters, earthquakes, radon, cavities, clays, groundwater and rocks.

Hazard names and other data are quoted as their producers publish them, in French.

Explore the commune on the map

Le Teil at a glance

Seismic zone
3 of 5 (moderate)
Radon potential
Category 2 of 3 (low potential, with aggravating factors)
Recognised natural disasters
21 since 1982
Underground cavities recorded
4
Ground movements recorded
14
Risk prevention plans
2

Hazards listed by the French State

Natural and technological hazards to which the commune is exposed, according to the national GASPAR database.

  • Inondation
  • Mouvement de terrain
  • Séisme
  • Feu de forêt
  • Nucléaire
  • Transport de marchandises dangereuses

Recognised natural disasters

21 events recognised as a natural disaster by ministerial order since 1982.

  • Inondations et/ou coulées de boue: 16
  • Sécheresse: 4
  • Secousse sismique: 1
  • Tempête: 1

  1. Sécheresse

    Event from 01/04/2023 to 30/06/2023, order published in the Journal officiel on 02/07/2024.

  2. Sécheresse

    Event from 01/01/2022 to 30/09/2022, order published in the Journal officiel on 10/06/2023.

  3. Sécheresse

    Event from 01/04/2020 to 30/06/2020, order published in the Journal officiel on 14/01/2022.

  4. Secousse sismique

    Event on 11/11/2019, order published in the Journal officiel on 23/11/2019.

  5. Sécheresse

    Event from 01/07/2017 to 30/09/2017, order published in the Journal officiel on 05/07/2018.

  6. Inondations et/ou coulées de boue

    Event from 13/09/2015 to 14/09/2015, order published in the Journal officiel on 29/10/2015.

  7. Inondations et/ou coulées de boue

    Event on 14/11/2014, order published in the Journal officiel on 04/03/2015.

  8. Inondations et/ou coulées de boue

    Event on 20/09/2014, order published in the Journal officiel on 07/11/2014.

  9. Inondations et/ou coulées de boue

    Event on 08/07/2013, order published in the Journal officiel on 26/10/2013.

  10. Inondations et/ou coulées de boue

    Event on 03/09/2008, order published in the Journal officiel on 10/10/2008.

  11. Inondations et/ou coulées de boue

    Event on 12/08/2008, order published in the Journal officiel on 07/11/2008.

  12. Inondations et/ou coulées de boue

    Event from 01/12/2003 to 02/12/2003, order published in the Journal officiel on 13/12/2003.

  13. Inondations et/ou coulées de boue

    Event from 24/11/2002 to 26/11/2002, order published in the Journal officiel on 09/03/2003.

  14. Inondations et/ou coulées de boue

    Event from 16/11/2002 to 17/11/2002, order published in the Journal officiel on 09/03/2003.

  15. Inondations et/ou coulées de boue

    Event from 25/09/1999 to 26/09/1999, order published in the Journal officiel on 11/02/2000.

  16. Inondations et/ou coulées de boue

    Event from 06/01/1994 to 11/01/1994, order published in the Journal officiel on 29/04/1994.

  17. Inondations et/ou coulées de boue

    Event from 01/10/1993 to 14/10/1993, order published in the Journal officiel on 30/12/1993.

  18. Inondations et/ou coulées de boue

    Event from 17/06/1992 to 18/06/1992, order published in the Journal officiel on 16/01/1993.

  19. Inondations et/ou coulées de boue

    Event from 11/10/1988 to 12/10/1988, order published in the Journal officiel on 15/12/1988.

  20. Tempête, Inondations et/ou coulées de boue

    Event from 06/11/1982 to 10/11/1982, order published in the Journal officiel on 19/11/1982.

  21. Inondations et/ou coulées de boue

    Event from 20/09/1982 to 21/09/1982, order published in the Journal officiel on 18/12/1982.

Earthquakes and radon

Seismic zone

Zone 3 of 5: moderate. This regulatory zoning, in force since 2011, sets the rules for earthquake-resistant construction.

Radon potential

Category 2 of 3: low potential, with aggravating factors. Geological features (faults, mine workings, thermal springs) can make it easier for radon to reach buildings. Radon is a naturally occurring radioactive gas that can build up in poorly ventilated rooms.

Beneath the town hall

What BRGM maps say at the town hall. They describe that single point: elsewhere in the commune, the ground may be quite different.

  • Shrink-swell clays

  • Rising groundwater

  • Underground cavities

  • Ground movements

  • Earthquakes

  • Nature of the ground

Cavities and ground movements

Recorded across the whole commune by BRGM, in its national databases of underground cavities and ground movements.

4 underground cavities recorded (quarries, cellars, military works, natural cavities…).

14 ground movements recorded (landslides, rockfalls, collapses, mudflows…).

See cavities and ground movements on the map

Risk prevention plans

  • LE TEIL

    Natural risk prevention plan, under revision.

  • LE TEIL

    Natural risk prevention plan.

The zoning and regulations of each plan, which may prohibit or restrict building, can be consulted at the town hall and on Géorisques.

Nearby communes

Sources and limitations

Listed hazards, natural disasters, seismic zoning, radon potential, cavities, ground movements and prevention plans: Géorisques, published by the French ministry for the ecological transition, under Licence Ouverte Etalab 2.0, data accessed on 03/11/2026. Summary beneath the town hall: BRGM map services, queried when the page is displayed. List of communes and populations: API Découpage administratif (geo.api.gouv.fr), d’après le code officiel géographique de l’Insee, version of 30/10/2026.

This information reflects the state of knowledge at the scale of the commune or of a single point. It replaces neither a soil survey nor the official risk statement (état des risques) required for a sale or a rental, which is drawn up on the official French government service.