Exhibit 11.1 COMPUTATION RE: EARNINGS PER SHARE WASTE HOLDINGS, INC. COMPUTATION RE: EARNINGS PER SHARE Year Ended December 31, ----------------------- 1999 2000 2001 ------- ------- ------- Basic Earnings Per Share: Net Income $12,024 $ 7,659 $ 7,382 ======= ======= ======= Weighted average number of common shares issued and outstanding 13,707 13,615 13,286 ======= ======= ======= Basic earnings per share $ 0.88 $ 0.56 $ 0.56 ======= ======= ======= Diluted Earnings Per Share: Net Income $12,024 $ 7,659 $ 7,382 ======= ======= ======= Weighted average number of common shares issued and outstanding 13,707 13,615 13,286 Common stock equivalents - Options for common stock 530 244 187 ------- ------- ------- Weighted average common stock equivalents 14,237 13,859 13,473 Less treasury shares assumed to be repurchased (186) (130) (131) ------- ------- ------- Weighted average shares outstanding 14,051 13,729 13,342 ======= ======= ======= Diluted earnings per share $ 0.86 $ 0.56 $ 0.55 ======= ======= =======