Paimpol: geology and natural hazards

Seismic zone

2 of 5 (low)

Radon potential

Category 3 of 3 (significant potential)

Recognised natural disasters

11 since 1985

Underground cavities recorded

3

Ground movements recorded

18

Risk prevention plans

1

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

• Inondation: par une crue à débordement lent de cours d’eau, par submersion marine
• Mouvement de terrain: affaissements et effondrements d’origine anthropique (anciennes carrières souterraines, hors mines), eboulement ou chutes de pierres et de blocs, glissement de terrain, recul du trait de côte et de falaises, tassements différentiels
• Séisme
• Phénomène lié à l’atmosphère: tempête et grains (vent)
• Radon
• Rupture de barrage

11 events recognised as a natural disaster by ministerial order since 1985.

• Inondations et/ou coulées de boue: 7
• Chocs mécaniques liés à l’action des vagues: 4
• Mouvement de terrain: 1
• Tempête: 1

1. Inondations et/ou coulées de boue

   Event from 01/10/2020 to 03/10/2020, order published in the Journal officiel on 08/10/2020.

2. Chocs mécaniques liés à l’action des vagues

   Event from 28/02/2010 to 01/03/2010, order published in the Journal officiel on 02/04/2010.

3. Chocs mécaniques liés à l’action des vagues

   Event on 10/03/2008, order published in the Journal officiel on 22/05/2008.

4. Inondations et/ou coulées de boue

   Event on 23/07/2007, order published in the Journal officiel on 08/12/2007.

5. Inondations et/ou coulées de boue

   Event from 09/02/2001 to 10/02/2001, order published in the Journal officiel on 18/07/2001.

6. Inondations et/ou coulées de boue, Chocs mécaniques liés à l’action des vagues, Mouvement de terrain

   Event from 25/12/1999 to 29/12/1999, order published in the Journal officiel on 30/12/1999.

7. Chocs mécaniques liés à l’action des vagues

   Event from 19/02/1996 to 20/02/1996, order published in the Journal officiel on 04/09/1996.

8. Inondations et/ou coulées de boue

   Event from 17/01/1995 to 31/01/1995, order published in the Journal officiel on 08/02/1995.

9. Inondations et/ou coulées de boue

   Event from 15/01/1988 to 15/02/1988, order published in the Journal officiel on 21/04/1988.

10. Tempête

    Event from 15/10/1987 to 16/10/1987, order published in the Journal officiel on 24/10/1987.

11. Inondations et/ou coulées de boue

    Event from 06/04/1985 to 08/04/1985, order published in the Journal officiel on 27/07/1985.

Seismic zone

Zone 2 of 5: low. This regulatory zoning, in force since 2011, sets the rules for earthquake-resistant construction.

Radon potential

Category 3 of 3: significant potential. At least part of the commune has higher-than-average 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.

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

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

See cavities and ground movements on the map

• PPRN-I Paimpol

  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.

• Ploubazlanec (22)
• Plourivo (22)
• Lézardrieux (22)
• Kerfot (22)
• Plouézec (22)
• Pleudaniel (22)
• Yvias (22)
• Île-de-Bréhat (22)

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.