Ill. Admin. Code tit. 35 § 611.313

Current through Register Vol. 48, No. 52, December 27, 2024

Section 611.313 - Maximum Residual Disinfectant Levels (MRDLs)

a) MRDLs:

Disinfectant residual	MRDL (mg/L)
Chlorine	4.0 (as Cl2)
Chloramines	4.0 (as Cl2)
Chlorine dioxide	0.8 (as ClO2)

b) Compliance

1) CWSs and NTNCWSs. A Subpart B system must comply with this Section.

2) Transient NCWSs. A Subpart B system supplier must comply with the chlorine dioxide MRDL.

c) USEPA identified the best technology, treatment techniques, or other means available for complying with the MRDLs in subsection (a): controlling treatment processes to reduce disinfectant demand and controlling disinfection treatment processes to reduce disinfectant levels.

Ill. Admin. Code tit. 35, § 611.313

Amended at 27 Ill. Reg. 16447, effective October 10, 2003

Amended at 42 Ill. Reg. 1140, effective 1/4/2018

Amended at 44 Ill. Reg. 6996, effective 4/17/2020

Amended at 47 Ill. Reg. 16486, effective 11/2/2023

BOARD NOTE: This Section derives from 40 CFR 141.65.