EXHIBIT 15 ---------- Board of Directors Atmos Energy Corporation We are aware of the incorporation by reference in the Registra tion Statements (Form S-3 No. 33-37869, Form S-3 No. 33-70212, Form S-3 D/A No. 33-58220, Form S-3 No. 33-56915, Form S-3/A No. 333-03339, Form S-3/A No. 333-32475, Form S-3/A No. 333-50477, Form S-3 No. 333-93705, Form S-3 No. 333-95525, Form S-4 No. 333- 13429, Form S-8 No. 33-57687, Form S-8 No. 33-68852, Form S-8 No. 33-57695, Form S-8 No. 333-32343, Form S-8 No. 333-46337, Form S- 8 No. 333-73143, and Form S-8 No. 333-73145) of Atmos Energy Corporation of our report dated January 31, 2000, relating to the unaudited condensed consolidated interim financial statements of Atmos Energy Corporation which are included in its Form 10-Q for the quarter ended December 31, 1999. ERNST & YOUNG LLP February 11, 2000 Dallas, Texas