The Hers-Mort (French pronunciation: [ɛʁs mɔʁ]; Occitan: Èrs Mòrt; the "Dead Hers", as opposed to the faster-flowing Hers-Vif, or "Live Hers") is a 89.3-kilometre (55.5 mi) long river in southern France,^{[lower-alpha 1]} a right-bank tributary of the Garonne.^[1] Its average flow rate is 4 cubic metres per second (140 cu ft/s). The Hers-Mort rises in the Lauragais region, near the village Fonters-du-Razès, in the Aude department. It flows northwest through the following departments and towns:

• Aude: Payra-sur-l'Hers, Salles-sur-l'Hers
• Haute-Garonne: Villefranche-de-Lauragais, Baziège, Toulouse, Saint-Jory

This article includes a list of general references, but it lacks sufficient corresponding inline citations. (December 2014)

Quick Facts Location, Country ...

Hers-Mort
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Location
Country	France
Physical characteristics
Source
• location	Lauragais
Mouth
• location	Garonne
• coordinates	43°46′28″N 1°19′37″E
Length	89 km (55 mi)
Discharge
• average	4 m3/s (140 cu ft/s)
Basin features
Progression	Garonne→ Gironde estuary→ Atlantic Ocean

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It flows into the Garonne near Grenade-sur-Garonne. Its waters, augmented by the Girou which flows into its right bank, irrigate the market gardens around Toulouse. The Canal du Midi crosses the Hers-Mort near Villefranche-de-Lauragais via the Hers Aqueduct.