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Ann Arbor Controls Trihalomethanes
Author(s) -
Sacks Richard S.
Publication year - 1984
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1984.tb05376.x
Subject(s) - chloramine , anhydrous , chlorine , water treatment , chemistry , raw water , trihalomethane , environmental science , environmental chemistry , waste management , environmental engineering , engineering , organic chemistry
Many water treatment plants in the United States were not initially designed to control the formation of trihalomethanes as by‐products of existing disinfection practices. New methods were needed to meet the National Interim Primary Drinking Water Regulations for total trihalomethanes (TTHMs), so many water purveyors began modifying existing treatment processes. The city of Ann Arbor, Mich., experimented with a variety of disinfection schemes using chlorine and chloramines. Anhydrous ammonia, added to the raw water after prechlorination, reduced TTHM concentrations to required levels.