SUBTITLE F: PUBLIC WATER SUPPLIES
CHAPTER I: POLLUTION CONTROL BOARD
PART 611 PRIMARY DRINKING WATER STANDARDS
SECTION 611.313 MAXIMUM RESIDUAL DISINFECTANT LEVELS (MRDLS)
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.
BOARD NOTE: This Section derives from 40 CFR 141.65.
(Source: Amended at 47 Ill. Reg. 16486, effective November 2, 2023)