Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 601 - INTRODUCTION
Section 601.101 - General Requirements

Universal Citation: 35 IL Admin Code ยง 601.101

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

a) Owners and official custodians of a public water supply in the State of Illinois must provide, under the Act, Board Rules, and the Safe Drinking Water Act (42 U.S.C. 300f et seq.), continuous operation and maintenance of public water supply facilities to assure that the water is safe in quality, clean, adequate in quantity, and of satisfactory mineral characteristics for ordinary domestic consumption.

b) Finished Water Quality

1) The finished water delivered to any user at any point in the distribution system must contain no impurity at a concentration that may be hazardous to the health of the consumer or that would be excessively corrosive or otherwise deleterious to the water supply. Drinking water delivered to any user at any point in the distribution system must contain no impurity that could reasonably be expected to cause offense to the sense of sight, taste, or smell.

2) Any substance used in treatment must not remain in the water at a concentration greater than that required by good practice. A substance that may have a deleterious physiological effect, or one for which physiological effects are not known, must not be used in a manner that would permit it to reach the consumer.

3) Concentrations of constituents listed in the following chart should not be exceeded in the finished water.

Contaminant

Secondary MCL

Noticeable Effects above the Secondary MCL

Aluminum

0.2 mg/L

colored water

Chloride

250 mg/L

salty taste

Color

15 color units

visible tint

Copper

1 mg/L

metallic taste; blue-green staining

Fluoride

2.0 mg/L

tooth discoloration

Foaming Agents

0.5 mg/L

frothy, cloudy; bitter taste; odor

Iron

0.3 mg/L

rusty color; sediment; metallic taste; reddish or orange staining

Manganese

0.05 mg/L

black to brown color; black staining; bitter metallic taste

Odor

3 T.O.N. (Threshold Odor Number)

"rotten-egg", musty or chemical smell

Silver

0.1 mg/L

skin discoloration; graying of the white part of the eye

Sulfate

250 mg/L

salty taste

Total Dissolved Solids

500 mg/L

hardness; deposits; colored water; staining; salty taste

Disclaimer: These regulations may not be the most recent version. Illinois may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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