Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 653 - DESIGN, OPERATION AND MAINTENANCE CRITERIA
Subpart F - CHLORINATION
Section 653.604 - Distribution System Residuals
Universal Citation: 35 IL Admin Code ยง 653.604
Current through Register Vol. 48, No. 38, September 20, 2024
a) A minimum free chlorine residual of 0.2 mg/l or a minimum combined residual of 0.5 mg/l shall be maintained in all active parts of the distribution system at all times.
b) Chlorine residual test shall be made at frequent and regular intervals to determine the amount and type of residuals existing at different points in the distribution system.
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