X0306 4 2018-04-02 0 0001604643 Evoqua Water Technologies Corp. AQUA 0001727751 Desai Snehal EVOQUA WATER TECHNOLOGIES CORP. 210 SIXTH AVENUE PITTSBURGH PA 15222 0 1 0 0 Chief Growth Officer Stock Option (Right to Buy) 20.88 2018-04-02 4 A 0 33279 0 A 2028-04-02 Common Stock 33279 33279 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 Snehal Desai 2018-04-04