Ill. Admin. Code tit. 35, § 302.208  Numeric Standards for Chemical Constituents
Current through Register Vol. 45, No. 52, December 27, 2021
Constituent 
AS (µg/L) 
CS (µg/L) 

Arsenic (trivalent, dissolved) 
360 x 1.0* = 360 
190 x 1.0* = 190 

Boron (total) 
40,100 
7,600 

Cadmium (dissolved) 
Image Image* 
ImageImage* 

where A = 2.918 and B = 1.128 
where A = 3.490 and B = 0.7852 

Chromium (hexavalent, total) 
16 
11 

Chromium (trivalent, dissolved) 
Image where A = 3.688 and B = 0.8190 
Image where A = 1.561 and B = 0.8190 

Copper (dissolved) 
Image where A = 1.464 and B = 0.9422 
Image where A = 1.465 and B = 0.8545 

Cyanide** 
22 
5.2 

Fluoride (total) 
Image 
Image, but shall not exceed 4.0 mg/L 

where A = 6.7319 and B = 0.5394 
where A = 6.0445 and B = 0.5394 

Lead (dissolved) 
Image 
Image 

where A = 1.301 and B = 1.273 
where A = 2.863 and B = 1.273 

Manganese (dissolved) 
Image0.9812* 
Image0.9812* 

where A = 4.9187 and B = 0.7467 
where A = 4.0635 and B = 0.7467 

Mercury (dissolved) 
2.6 x 0.85* = 2.2 
1.3 x 0.85* = 1.1 

Nickel (dissolved) 
Image 
Image 

where A = 0.5173 and B = 0.8460 
where A = 2.286 and B = 0.8460 

TRC 
19 
11 

Zinc (dissolved) 
Image 
Image 

where A = 0.9035 and B = 0.8473 
where A = 0.4456 and B = 0.8473 

Benzene 
4200 
860 

Ethylbenzene 
150 
14 

Toluene 
2000 
600 

Xylene(s) 
920 
360 
where: 

µg/L 
= 
microgram per liter 

ex 
= 
base of natural logarithms raised to the xpower 

ln(H) 
= 
natural logarithm of Hardness 

* 
= 
conversion factor multiplier for dissolved metals 

** 
= 
standard to be evaluated using either of the following USEPA approved methods, incorporated by reference at 35 Ill. Adm. Code 301.106: Method OIA1677, DW: Available Cyanide by Flow Injection, Ligand Exchange, and Amperometry, January 2004, Document Number EPA821R04001 or Cyanide Amenable to Chlorination, Standard Methods 4500CNG ( 40 CFR 136.3 ) 
Constituent 
(µg/L) 

Mercury (total) 
0.012 

Benzene 
310 
where: 

µg/L 
= 
micrograms per liter 
Constituent 
Unit 
Standard 

Barium (total) 
mg/L 
5.0 

Chloride (total) 
mg/L 
500 

Iron (dissolved) 
mg/L 
01046 
1.0 
Phenols 
mg/L 
0.1 

Selenium (total) 
mg/L 
1.0 

Silver (total) 
µg/L 
5.0 
where: 

mg/L 
= 
milligram per liter and 

µg/L 
= 
microgram per liter 
C = [1276.7 + 5.508 (hardness)  1.457 (chloride)] * 0.65
where:
C = sulfate concentration
C = [57.478 + 5.79 (hardness) + 54.163 (chloride)] * 0.65
where:
C = sulfate concentration
Notes
Amended at 37 Ill. Reg. 7493, effective May 16, 2013
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