dont have a date on this document but it says they use both chlorine and chloramines:
http://www.acwater.org/sites/default/files/file/publications/WaterQuality.pdf
Three Rivers Water Filtration Plant
Allen County Partnership for Water Quality
3718 New Vision Drive
Fort Wayne, IN 46845
Phone: (260)484-5848 ext. 111
Fax: (260) 484-5080
City of Fort Wayne · City of New Haven ·
Allen County
Fort Wayne's Three Rivers Water Filtration Plant was
constructed in 1933 with a capacity to produce 24 million
gallons of treated water per day (MGD). Major additions
in 1955 and 1981 tripled the capacity of the plant to 72
MGD.
Not only does the plant provide drinking water to the
residents of Fort Wayne, its supply also reaches residents
of New Haven, Lutheran Hospital at Jefferson & I69,
Parkview Hospital North, St. Joseph Hospital on Dupont
Road, and AQUASOURCE customers in Aboite
Township during the summer months.
The plant uses a combination of chemicals including:
chlorine dioxide and chloramine for disinfection; lime
and carbon dioxide for softening; ferric sulfate for
flocculation; and powdered activated carbon to remove
organic chemicals, pesticides, and odor-causing natural
organic material. Rapid sand filtration removes
particulate matter and cryptosporidium. Fluoride is
added at a rate of 1 mg/L to help prevent tooth decay