Tritaia

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right|thumb|280px|View of Ntaska Reservoir near Velimachi village, Tritaia region, Achaia, Greece. Tritaia () is a former municipality in Achaea, West Greece, Greece. Since the 2011 local government reform it is part of the municipality Erymanthos, of which it is a municipal unit. The municipal unit has an area of 244.798 km2. The seat of the municipality was in Stavrodromi. Tritaia was named after the ancient Achaean city Tritaea, which was located near the present village Agia Marina. Tritaia is situated in mountainous southern Achaea, on the border with Elis. It nearly surrounds the mu