Federal soil maps split Metairie into a few very different lawn bases. Close to 6 in 10 acres sit on drained marsh muck, about a quarter is true backswamp clay, and the oldest strip along Metairie Road rides on natural levee loam. No soil anywhere in Metairie is rated better than somewhat poorly drained, so even the “good” ground here holds water.
Map lines are approximate, and your lot can differ from the neighborhood’s dominant soil. A routine soil test through the LSU AgCenter office for Jefferson Parish