Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 604 - DESIGN, OPERATION, AND MAINTENANCE CRITERIA
Subpart G - DISINFECTION
Section 604.725 - Residual Chlorine
Universal Citation: 35 IL Admin Code ยง 604.725
Current through Register Vol. 48, No. 38, September 20, 2024
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.
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