Ill. Admin. Code tit. 35 § 653.604

Current through Register Vol. 49, No. 2, January 10, 2025

Section 653.604 - Distribution System Residuals

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.

Ill. Admin. Code tit. 35, § 653.604