X0306 4 2018-04-02 0 0001604643 Evoqua Water Technologies Corp. AQUA 0001720147 Aulick Rodney EVOQUA WATER TECHNOLOGIES CORP. 210 SIXTH AVENUE PITTSBURGH PA 15222 0 1 0 0 Executive Vice President Stock Option (Right to Buy) 20.88 2018-04-02 4 A 0 49730 0 A 2028-04-02 Common Stock 49730 49730 D Subject to the reporting person's continued employment with the issuer through the applicable vesting date, this option is scheduled to vest in equal installments on each of January 1, 2019, January 1, 2020, January 1, 2021 and January 1, 2022. /s/ John DiMascio, Attorney-in-Fact for Rodney Aulick 2018-04-04