United States
Environmental Protection
Agency
Office of Water
Regulations and Standards
Washington, DC 20460
EPA 440/5-88-049
September 1388
Water
State Water Quality
Standards Summary:
Illinois
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DISCLAIMER
This publication was prepared by Battelle under contract to
the U.S. Environmental Protection Agency (Contract 68-03-3534).
Secondary information sources were used to compile data presented
in this document. Each State was given an opportunity to review
and provide comments on a draft of this information document. In
no event shall either the United States or Battelle have any
responsibility or liability for any use, misuse, or reliance upon
the information contained herein, nor does either warrant or
otherwise represent in any way the accuracy, adequacy, efficacy,
-or applicability of the contents hereof.
The reader should consult the water quality standards of a
particular State for exact regulatory language applicable to that
State. Copies of State water quality standards may,be obtained
from the State's Water Pollution Control Agency or its
equivalent.
Additional information may also be obtained from the:
Standards Branch
Criteria and Standards Division (WH-585)
Office of Water Regulations and Standards
U.S. Environmental Protection Agency
Washington, D.C. 20460
202-475-7315
This document may be obtained only from the National Technical
Information Service (NTIS) at the following address:
National Technical Information Service
5285 Front Royal Road
Springfield, Virginia 22161
703-487-4650 ;
The NTIS order number is: PRRQ-141816
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ILLINOIS
Responsible Agency:
Illinois Environmental Protection Agency
Division of Hater Pollution Control
2200 Churchill Road
Springfield
217-782-3362
62706
Standards Available From:
Toby Frevert, Manager
Planning Section
Illinois Environmental Protection Agency
2200 Churchill Road
Springfield 62706
217-782-3362 Fee: Hailing List: no
State Contact:
Mr. Toby Frevert
Manager
Planning Section
Illinois Environmental Protection Agency
2200 Churchill Road
Springfield 62706 217-7B2-3362
State Contact:
Mr, James Park
Manager
Division of Mater Pollution Control
Illinois Environmental Protection Agency
2200 Churchill Road
Springfield 62706 217-782-3362
State Narrative Language For: Antidegradation
Maters whose existing quality is better than the established standards at the date of their adoptions dill be
maintained in their present high quality. Such waters Hill not be lowered in quality unless and until it is
affirmatively demonstrated that such change Hill not interfere with or become injurious to any appropriate
beneficial uses made of, or presently possible in such Haters and that such change is justifiable as a result
of necessary economic or social development.
State Narrative Language Fo.r: Toxics
Any substance toxic to aquatic life shall not exceed one-tenth of the 96-hour median tolerance limit (96-hr.
TLi) for native fish or essential fish food organisms, except for USEPA registered pesticides approved for
aquatic application and applied pursuant to specified conditions.
State Narrative Language Fors Free From
Maters of the State shall be free from unnatural sludge or bottom deposits, floating debris, visible oil,
odor, unnatural plant or algal growth, unnatural color or turbidity, or matter of other than natural origin in
concentrations or combinations toxic or harmful to human, animal, plant, or aquatic life.
State Narrative Language For: Low Flow
Stream Flows - Except as otherwise provided in this Chapter with respect to temperature, the Hater quality
standards in this Part shall apply at all times except during periods when flows are less than the average
miniaui seven day flow which occurs once in ten years.
State Narrative Language For: Mixing Zones
(a) In the application of this Chapter, whenever a water quality standard is more restrictive than its
corresponding effluent standard then an'opportunity shall be allowed for the mixture of an effluent with its
receiving waters. Mater quality standards must be met at every point outside of the mixing zone. The size
of the mixing zone cannot be uniformly prescribed. The governing principle is that the proportion of any body
of water or segment thereof within mixing zones east be quite small if the water quality standards are to
have any meaning. This principle shall be applied on a case-by-case basis to ensure that neither any individ-
ual source nor the aggregate of sources shall cause excessive zones to exceed the standards. The water quali-
ty standards sust be set in the bulk of the body of water, and no body of water may be used totally as a mix-
ing zone for a single outfall or a combination of outfalls. Moreover, except as otherwise provided in this
Chapter, no single mixing zone, shall exceed the area of a circle with a radius of 183 meters (600 feet).
Single sources of effluents which have more than one outfall shall be limited to a total mixing area no
larger than that allowable if a single outfall were used.
(b) In determining the size of the mixing zone for any discharge, there are several considerations.
(c) The mixing zone shall be so designed as to assure a reasonable zone of passage for aquatic life in which
the water quality standards are met. The mixing zone shall not intersect any area of any such waters in such
a manner that the maintenance of aquatic life in the body of water as a whole would be adversely affected,
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ILLINOIS
nor shall any lixing zone contain tore than 252 of the cross-sectional area or voluie of flon of a streai
except for those streais where the dilution ratio is less than 3:1.
Teiperature standards contain additional requirements for heated discharges.
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ILLINOIS
Classifications:
General Use Haters Except as otherwise specifically provided,all waters of the State lust leet the
general use standards' of Subpart B of Part 302.
Public and Food Except as otherwise specifically provided and in addition to the general use
Processing Mater standards of Subpart B. Part 302, waters of the State shall §eet the public and
Supply food processing water supply standards of Subpart C. part 302, at any point at
which water is withdrawn for treatient and distribution as a potable supply or
for food processing.
Underground Haters The underground waters of Illinois which are a present or a potential source of
water for public or food processing supply shall ieet the general use and public
and food processing water supply standards of Subparts B I C, Part 302, except
due to natural causes.
Secondary Contact ( These are waters which are required to ieet the secondary contact and indigenous
Indigenous Aquatic aquatic life standards of Subpart D, Part 302, are not required to aeet the
Life Haters general use standards or the public food processing water supply standards of
Subparts B & C, Part 302.
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ILLINOIS
All Beneral Use Nat.. Public and Food Underground Nat..
Classes
Physical '
PH
Upper Value 9.0
Loner Value 6.5
Dissolved Oxygen
Loner Value 5.0 ig/L
Temperature
Upper Value Narr.
Tenperature Change
Upper Value Narr. -
Chlorides
Upper Value 500 §g/L 250 «g/L
Sulfates
Upper Value 500 ig/L 250 §g/L
Total Dissolved Solids
Upper Value 1000 «g/L 500 §g/L
Nutrients
Auonia (un-ion)
Upper Value Narr.
Nitrate & Nitrite
Upper Value 10.0 ig/L
• Phosphorus
Upper Value 0.05 ig/L ' dBfc
Toxic Metals
Arsenic
Upper Value
Cadsiui
Upper Value
Chroiiui - Total
Upper Value
Chroiiui - Hexavalent
Upper Value
Chroiiui - Trivalent
Upper Value
Copper
Upper Value
Cyanide
Upper Value
Iron
Upper Value
Lead
Upper Value
Hercury
Upper Value
Zinc
Upper Value
Bariui
Upper Value
•
1.0
0.05
0.05
1.0
0.02
0.025
1.0
0.1
0.0005
1.0
5.0
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
0.05 ig/L
0.010 ig/L
0.05 ig/L
0.05 ig/L
1.0 cg/L
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ILLINOIS
All
Classes
Boron
Upper Value
Manganese
Upper Value
Nickel
Upper Value
Seleniui
Upper Value
Silver
Upper Value
Pesticides
Aldrin
Upper Value
Dieldrin
"Upper Value
Chlordane
Upper Value
2,4 D
Upper Value
2,4,5-TP Silvex
Upper Value
DDT
Upper Value
Endrin
Upper Value
Heptachlor
Upper Value
Heptachlor Epoxide
Upper Value
Lindane
Upper Value
Nethoxychlor
Upper Value
Parathion
Upper Value
Toxaphene
Upper Value
Organics
Phenols
Upper Value
Bacteria
Fecal Colifon
Upper Value
General Use Hat.. Public and Food Underground Nat..
1.0 ig/L
1.0 ig/L 0.15 ig/L
1.0 ig/L
1.0 ig/L 0.01 tg/L
0.005 ig/L
0.001 ig/L
0.001 ig/L
0.003 ig/L
0.1 ig/L
0.01 §g/L
0.050 tg/L
0.0002 ig/L
0.0001 ig/L
0.0001 ig/L
0.004 tg/L
0.1 ig/L
0.1 ig/L
0.005 ig/L
0.1 ig/L
0.001 ig/L
Karr. site-spec. Narr.
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ILLINOIS
Secondary Conta..
Physical
pH
Upper Value
Loner Value
Total Dissolved Solids
Upper Value
Nutrients
fluonia (un-ion)
Upper Value
Toxic Metals
Arsenic
Upper Value
Cadiiui
Upper Value
Chroiiui - Hexavalent
Upper Value
Chroiiui - Trivalent
Upper Value
Copper
Upper Value
Cyanide
Upper Value
Iron (Tot.)
Upper Value
Secondary Upper Liiit
Lead
Upper Value
Mercury
Upper Value
Zinc
Upper Value
Bariui
Upper Value
Manganese
Upper Value
Nickel
Upper Value
Seleniui
Upper Value
Silver
Upper Value
9.0
6.0
1500
0.1
1.0
0.15
0.3
1.0
1.0
0.10
2.0 T
0.5 D
0.1
0.0005
1.0
5.0
1.0
1.0
1.0
0.1
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
•g/L
Pesticides
Organics
Phenols
Upper Value
Bacteria
0.3 ig/L
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ILLINOIS
Secondary Conta..
Fecal Colifon
Upper Value Narr.
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