— auvergne-rhone-alpes · 69
Industrial and natural hazards in Lyon 3e arrondissement — July 2026
Hazard level in Lyon 3e arrondissement
high
- ICPE (≤ 1 km) 16
- Flood zone (PPRI) Yes
- Radon potential 1/3 low
Summary of ICPE, Seveso, flood and radon hazards — detail and sources below. Always request the ERP before any offer.
Géorisques / IRSN
Industrial and natural hazards in Lyon 3e arrondissement
In Lyon 3e arrondissement, the overall industrial and natural risk score is high (composite ICPE, Seveso, flood plans, radon).
Diagnostic risques de votre logement
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Understanding hazards in Lyon 3e arrondissement
The assessment of industrial and natural hazards in Lyon 3e arrondissement crosses several official public bases: ICPE (Géorisques DGPR), Seveso sites, flood plans (PPRI), seismicity (BRGM) and radon potential (IRSN). Each of these families is detailed, quantified and sourced in the indicators above.
In practice, the town has 16 ICPE on average (1 km radius), of which an unrecorded share at the commune level in Seveso sites with major industrial risk. The commune is covered by a flood plan (PPRI) (buyer-tenant disclosure mandatory at sale). The radon potential is 1/3 low according to the IRSN classification.
For a purchase, the State of Risks and Pollutions (ERP) is mandatory and must be appended to the sale agreement. It lists all natural disaster orders (CatNat), PPR zones, and known polluted sites. To request systematically, ideally before the offer.
Sources: Géorisques (DGPR) — ICPE, Seveso, PPRI, BASIAS/BASOL. BRGM — seismicity, clay shrink-swell. IRSN — radon potential. ERP mandatory at sale (Environment Code L.125-5). The overall score is an NTYP composite (weighting of the dimensions above) — see our methodology.
Clay shrink-swell (cracks)
In Lyon 3e arrondissement, exposure to clay-soil shrink-swell is Exposition faible.
Clay shrink-swell (RGA) is the leading cause of cracks in single-family houses: clay soils swell when wet and shrink during drought, which moves foundations and cracks walls. The phenomenon is rising sharply as drought episodes multiply.
The damage is compensated under the natural disaster cover of home insurance, provided a "drought" CatNat order is issued for the town. Before buying on clay-rich ground, have the hazard and the state of the building checked (soil survey, existing cracks) — it is a point to verify systematically.
Source: Géorisques (DGPR) / BRGM — clay shrink-swell hazard. ERP mandatory at sale (Environment Code L.125-5).
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— Your questions
Frequently asked questions
How to know if my address is concerned by a flood plan (PPRI)?
The State of Risks and Pollutions (ERP) is mandatory at sale and rental. The seller or landlord must give it to you appended to the agreement. You can also check directly georisques.gouv.fr with your address.
Seveso site within 500 m: danger?
An upper-tier Seveso site has a PPRT binding on building permits. The lethal effect zone is typically < 500 m, the serious-injury zone < 2 km. At 500-2000 m, risks are monitored (SAIP alert) but existing buildings remain insurable.
High radon: what to do?
Radon is a radioactive gas of geological origin, present in granitic subsoil (Brittany, Massif Central, Vosges). For levels > 300 Bq/m³, IRSN recommendations: enhanced ventilation, slab sealing, continuous measurements. Intervention cost: 500-5000 €.
How does home insurance account for hazards?
Natural disasters are covered mandatorily (12 % contribution of the multi-risk contract). Clay shrink-swell (RGA) is rising rapidly (climate change) and some areas see insurance refusals or high deductibles. Compare several insurers before signing.