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 611.310 - State-Only Maximum Contaminant Levels (MCLs) for Organic Chemical Contaminants
The following are State-only MCLs for organic chemical contaminants. These State-only MCLs apply to all CWSs. A supplier must calculate compliance with these State-only MCLs in subsections (a) and (b) under Subpart O.
|
Contaminant |
MCL (mg/L) |
|
Aldrin |
0.001 |
|
DDT |
0.05 |
|
Dieldrin |
0.001 |
|
Heptachlor |
0.0001 |
|
Heptachlor epoxide |
0.0001 |
|
2,4-D |
0.01 |
BOARD NOTE: This Section originally derived from 40 CFR 141.12 (1992). USEPA removed the last entries from subsections (a) and (b) and marked them reserved at 57 Fed. Reg. 31838 (July 17, 1992). USEPA entirely removed 40 CFR 141.12 and marked it "reserved" at 71 Fed. Reg. 388 (Jan. 4, 2006). USEPA's organic chemical MCLs are now at 40 CFR 141.61, which corresponds with Section 611.311. Different MCLs for heptachlor, heptachlor epoxide, and 2,4-D appear in both this Section and Section 611.311. The heptachlor, heptachlor epoxide, and 2,4-D MCLs in this Section are Illinois limitations that are more stringent than the federal requirements. However, detection of these contaminants or violation of the federally-derived revised MCLs in Section 611.311 imposes more stringent monitoring, reporting, and notice requirements.
