AWWA C655-25 Field Dechlorination
The purpose of this standard is to define the minimum procedures for field dechlorination of chlorinated water or water treated with chloramines that is to be discharged, including discharge site preparation, sampling and testing of discharge water, various methods of dechlorination, and dechlorination chemicals.
Description
This standard describes procedures, materials, and requirements for field dechlorination of chlorinated water discharges or discharges of water treated with chloramines such as may occur from pipeline disinfection projects, hydrant flow testing, tank or pipeline draining or flushing, or distribution system maintenance flushing programs, when dechlorination is required.
It can be referenced in specifications for field dechlorination of chlorinated water or water treated with chloramines that is to be discharged into the environment. The stipulations of this standard apply when this document has been referenced, and then only to field dechlorination. The dechlorination operation shall comply with applicable permit or regulatory requirements, as per Sec. 5.1.1.