Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 611 - PRIMARY DRINKING WATER STANDARDS
Subpart F - MAXIMUM CONTAMINANT LEVELS (MCLs) AND MAXIMUM RESIDUAL DISINFECTANT LEVELS (MRDLs)
Section 611.313 - Maximum Residual Disinfectant Levels (MRDLs)
Universal Citation: 35 IL Admin Code ยง 611.313
Current through Register Vol. 48, No. 12, March 22, 2024
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.
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