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Chlorine Information
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The Illinois Section AWWA will post information for our members regarding the latest information on chlorine issues affecting Illinois utilities


This became the law on July 26, 2019


  35 ILLINOIS ADMINISTRATIVE CODE 604               Section: 604.725              SUBTITLE F



Section 604.725 Residual Chlorine


a)               A minimum free chlorine residual of 0.5 mg/L or a minimum combined chlorine residual of 1.0 mg/L must be maintained in all active parts of the distribution system at all times.


b)               Community water supplies must monitor chlorine residual to determine the amount and type of residuals existing at different points in the distribution system.


c)               Community water supplies must not mix water sources with free chlorine and combined chlorine residual. 


For more information on chlorine and other laws click the link


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