Codolet: geology and natural hazards

Seismic zone

3 of 5 (moderate)

Radon potential

Category 1 of 3 (low potential)

Recognised natural disasters

11 since 1982

Underground cavities recorded

None

Ground movements recorded

1

Risk prevention plans

1

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

• Inondation: par une crue torrentielle ou à montée rapide de cours d’eau
• Mouvement de terrain: affaissements et effondrements d’origine anthropique (anciennes carrières souterraines, hors mines), glissement de terrain, tassements différentiels
• Séisme
• Feu de forêt
• Radon
• Transport de marchandises dangereuses
• Affaissement minier: effondrements localisés, tassements
• Inondations de terrains miniers: pollution des eaux souterraines et de surface
• Emissions en surface de gaz de mine

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

• Inondations et/ou coulées de boue: 11
• Tempête: 1

1. Inondations et/ou coulées de boue

   Event on 10/03/2024, order published in the Journal officiel on 09/06/2024.

2. Inondations et/ou coulées de boue

   Event from 01/12/2003 to 04/12/2003, order published in the Journal officiel on 13/12/2003.

3. Inondations et/ou coulées de boue

   Event from 24/11/2002 to 25/11/2002, order published in the Journal officiel on 18/04/2003.

4. Inondations et/ou coulées de boue

   Event from 16/11/2002 to 17/11/2002, order published in the Journal officiel on 18/04/2003.

5. Inondations et/ou coulées de boue

   Event from 08/09/2002 to 10/09/2002, order published in the Journal officiel on 20/09/2002.

6. Inondations et/ou coulées de boue

   Event from 27/05/1998 to 28/05/1998, order published in the Journal officiel on 29/07/1998.

7. Inondations et/ou coulées de boue

   Event on 13/11/1996, order published in the Journal officiel on 01/06/1997.

8. Inondations et/ou coulées de boue

   Event from 19/10/1994 to 21/10/1994, order published in the Journal officiel on 17/03/1995.

9. Inondations et/ou coulées de boue

   Event from 07/01/1994 to 15/01/1994, order published in the Journal officiel on 24/03/1994.

10. 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.

11. Inondations et/ou coulées de boue, Tempête

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

Seismic zone

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

Radon potential

Category 1 of 3: low potential. The geological formations have the lowest uranium content. Radon is a naturally occurring radioactive gas that can build up in poorly ventilated rooms.

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

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

No underground cavity recorded (quarries, cellars, military works, natural cavities…).

1 ground movement recorded (landslides, rockfalls, collapses, mudflows…).

See cavities and ground movements on the map

• PPRN-I - Codolet

  Natural risk prevention plan, under revision.

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

• Orsan (30)
• Chusclan (30)
• Laudun-l’Ardoise (30)
• Caderousse (84)
• Saint-Étienne-des-Sorts (30)
• Saint-Geniès-de-Comolas (30)
• Montfaucon (30)
• Bagnols-sur-Cèze (30)

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 02/11/2026. 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.