Hérault and Gard · about 5 km from Nant
Source du Durzon
- Max depth138 m
- CertificationFull cave
- Water temperature≈ 11–13 °Cestimated, no reports yet
- SpecialDPV-suitable
Diving and fills
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Fills nearby
- Fill stationLa Palanquée New'sNitrox and oxygen per a 2018 forum post; trimix and pressure: askRoute ↗
What it looks like
Plongée spéléo à la source du Durzon Source du Durzon plongée N°2
All 3 videos and posts
Videos and posts
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Other people's footage, not advice: how someone else dives here says nothing about what suits your team. Dive within your training.
The dive
A major Larzac spring, with water at 11–13 °C and a flow of 1 to 20 m³/s. The spring has been explored since the 1980s. End points: 2003 (2,050 m), 2013 (1,945 m) and 2020 (2,110 m, by scooter).
1 earlier accident or incident has been reported at this cave. Read what happened ↓
Profile and sections
A major Larzac spring, with water at 11–13 °C and a flow of 1 to 20 m³/s.
The spring has been explored since the 1980s. End points: 2003 (2,050 m), 2013 (1,945 m) and 2020 (2,110 m, by scooter).
Practical: the spring supplies drinking water to several municipalities; swimming and wading are banned.
- Depth and profile
- Bedding plane 8–10 m wide to -50 m · Galerie des Cloches 326 m · Grand Laminoir 600 m · Trémie Chouquet 700 m · Dunes 800–900 m · Trémie Douchet 1,000 m · Laminoir Stanton 1,125 m · Boîte à Lettres 1,430 m · end point 2,110 m (2020); max -138 m, 3,100 m surveyed
- Configuration
- Roomy passages (5–6 m, deeper on average 7 x 3 m), but with a difficult restriction: sidemount is the favourite for passing it; backmount works but is harder. CCR and scooter for the far sections.
- DPV: DPV-suitable
- Long, roomy passages; the 2020 exploration used scooters (Seacraft) to the end point at 2,110 m.
Who can dive where
- At least Full cave
- Configurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
- Goes down to 138 m (trimix or deco may be needed)
- Experienced divers only
This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.
How to get there
Le Mas de Pommiers on the D178, ~6 km from Nant; short marked footpath to the spring. Only with authorisation from the Nant town hall and the Larzac water syndicate.
Around Source du Durzon
Fills1 fill station · 74 km
La Palanquée New's
Boulevard Frédéric Fabrèges, 34250 Palavas-les-Flots
Nitrox and oxygen per a 2018 forum post; trimix and pressure: ask
Mon–Fri 9:00–19:00, Sat 9:30–12:30 and 13:30–19:00, closed Sun (2026)
Large dive shop on the coast near Montpellier (~1 h from Ganges, estimate). Its own site does not mention fills: call ahead. In 2018 a local diver called it the only place around Montpellier for nitrox and O₂.
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News
All (1)
Accidents and incidents
What happened at this cave before, with the sources. No names are given; read it as a lesson for your own planning.
- Incidents (plongeesout list): 1983 — after a 4 h 10 exploration dive (780 m / -60, 3 h deco) a diver's legs locked up; recovery after about an hour. May 1999 — decompression illness (shoulder) four hours after a deep dive, treated in a hyperbaric chamber. 1999 — on a scooter reconnaissance dive in the deep zone (-65 m) the line caught in the propeller.
Access and rules change: check what applies locally right before your trip. Source: GDELT Project and the news feeds of diving magazines. Search for more news ↗ Searched automatically, last on 13 Nov 2026.
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