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| Lake Pontchartrain | |
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| Coordinates | 30°12′22″N 90°06′08″W / 30.206055°N 90.102132°WCoordinates: 30°12′22″N 90°06′08″W / 30.206055°N 90.102132°W |
| Lake type | salt-water lake |
| Basin countries | United States |
| Surface area | 630 sq mi (1630 km²) |
| Settlements | New Orleans, Metairie, Kenner, Mandeville, Slidell, Madisonville, etc. |
Lake Pontchartrain (pronounced /ˈpɒntʃətreɪn/ in English; Lac Pontchartrain, IPA [lak pɔ̃ʃaʀtʀɛ̃] in French) is a brackish lake in southeastern Louisiana. It is the second largest salt-water lake in the United States, after the Great Salt Lake in Utah, and the largest lake in Louisiana.
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