0001604643 2021-05-05 2021-05-05 false 0001604643 8-K 2021-05-05 EVOQUA WATER TECHNOLOGIES CORP. DE 001-38272 46-4132761 210 Sixth Avenue Pittsburgh, PA 15222 (724) 772-0044 false false false false Common Stock, par value $0.01 per share AQUA NYSE false 2021-05-05 2021-05-05