File Permit Number MO-G641000 Effective Date Tue, 08/08/2023 - 12:00 Expiration Date Mon, 08/07/2028 - 12:00 Description SIC #4941 Discharges of backwash water from water softening units. Zeolite filter backwash discharges. Additional Files MO-G641000 Permit Requirements for Zeolite Water Softener Filter Backwash
