Environmental Protection
Agency
Regulations and Standards
Washington, DC 20460
EPA 4401548-048
September 1988
State Water Quality
Standards Summary:
Idaho
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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: PB89-141808
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IDAHO
Responsible 'Agency:
Idaho Dept. of Health and Welfare
Division of Environmental Quality
450 W. State Street
Boise
208-334-5839
83720
Standards Available From:
Lil Nesiith
Idaho Department of Health and Welfare
Adiinistrative Procedures Section
450 K. State Street
Boise 83720
Fee: Hailing List: no
State Contact:
Hr. ftl Hurrey
Chief
Hater Quality Bureau, Div. Env. Quality
Idaho Department of Health and Welfare
450 W. State Street
Boise 83720 208-334-5860
State Contacts
Us. Susan Hartin
Manager
Plan, ft Tech. Support Sect., W.Q. Bureau
Idaho Dept. of Health and Welfare
450 W. State Street
Boise 83720 208-334-5845
State Narrative Language Fors Antidegradation
No new point source can discharge, and no existing point source can increase its discharge, above the design
capacity of the existing wastewater treatment facility to any water designated as special resource Hater or to
the upstream segment of a special resource Mater, if pollutants significant to the designated uses contained
in that discharge can or will result in a reduction of the ambient Hater quality of the receiving special
resource Mater as measured immediatly beloM applicable mixing zone.
Please refer to the 'EPA Water Quality Criteria Summaries: A Compilation of State/Federal Criteria" for
additional antidegradation language for Idaho.
State Narrative Language Fors Toxics
The following general water quality standards Mill apply to Haters of the State, both surface and under-
ground, in addition to the Mater quality standards set forth for. specifically classified Haters. As a result
of man-caused point or nonpoint source discharge, waters of the State must not contain:
.01 Hazardous Materials: (see Section 01.2003,19.) in concentrations found to be of public health signifi-
cance or to adversely affect designated or protected beneficial uses.
.02 Deleterious Materials: (see Section 01,2003,07.) in concentrations that impair designated or protected
beneficial uses without being hazardous.
State Narrative Language Fors Free From
Haters of the State Bust not contain: ,
1. Hazardous materials in concentrations found to be of public health significance or to adversely affect
designated or protected beneficial uses. ,
2. Deleterious materials in concentrations that impair designated or protected beneficial uses without being
hazardous. These materials do not include suspended sediment produced as a result of nonpoint source activity
3. Radioactive materials or radioactivity which:
(a) Exceed one-third (1/3) of the values listed in Idaho Department of Health and Welfare Rules and Regula-
tions, Title 1, Chapter 9, Section 01.9110,03.a.ii., 'Rules Governing Radiation Control."
(b) Exceed concentrations required to meet the "Radiation Protection Guides' for maximum exposure of critical
huean organs recommended by the. former Federal Radiation Council in the case of food stuffs harvested from
these waters for human consumption.
4. Floating, suspended, or submerged matter of any kind in concentrations causing nuisance or objectionable
conditions or that may adversely affect designated beneficial uses.
5. Excess nutrients that can cause visible slime growths or other nuisance aquatic growths impairing
designated or protected beneficial uses.
6. Oxygen-demanding materials in concentrations that would result in an anaerobic water condition.
7. Sedieent in quanities specified in Idaho Dept. of Health and Welfare Rules and Regulations Section 01.2250
or, in the absence of specific sediment criteria, in quantities which impair beneficial uses. Determinations
of iepairment shall be based on water quality monitoring and surv. and the information described in Idaho
Rules and Regulations Section 01.2300, 04.b.
ID-1
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IDAHO
State Narrative Language For: Mixing Zones
After a biological, chemical, and physical appraisal of the receiving water and the proposed discharge and
after consultation with the person(s) responsible for the wastewater discharge, the Department will determine
the applicability of a mixing zone and, if applicable, its size, configuration, and location. In defining a
mixing zone, the Department Hill consider the following principals:
(a) The mixing zone may receive «astewater through a submerged pipe, conduit, or diffuser.
(b) The mixing zone is to be located so it does not cause unreasonable interference with or danger to
existing beneficial uses.
(c) Hhen two [2J or more individual mixing zones are needed for a single activity, the sum of the areas and
volumes of the several mixing zones is not to exceed the area and volume which would be allowed for a single
zone.
(d) Multiple mixing zones can be established for a single discharge, each being specific for one (1) or more
pollutants contained within the discharged Hastewater.
(e) Nixing zones in flowing receiving waters are to be limited to the following:
i. The cumulative width of adjacent mixing zones when measured across the receiving water is not to exceed 501
of the total width of the receiving water at that point.
ii. The width of a mixing zone is not to exceed 25Z of the stream width of three hundred meters plus the
horizontal length of the diffuser as measured perpendicularly to the stream flow, whichever is less.
iii. The mixing zone is to be no closer to the 10 year, 7 day low-flow shoreline than 15Z of the stream width
Please refer to the 'EPA Hater Quality Criteria Summaries: A Compilation of State/Federal Criteria1
for additional mixing zone language for Idaho. •
ID-2
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Classifications
Agricultural
Hater Supplies
Domestic
Hater Supplies
Cold Water Biota
Hart Hater Biota
Salmonid Spawning
Primary Contact
Recreation
Secondary Contact
Recreation
Unspecified Surface
Maters
Industrial Hater
Supplies, Wildlife
Habitats t Aesthetic
Han-Rade waterways
Private Haters
IDAHO
Haters which are suitable or intended to be tade suitable for the irrigation of
crops or as drinking water for livestock.
Haters which are suitable or intended
supplies.
to be made suitable for drinking water
Haters which are suitable or intended to be made suitable for protection and
•aintenance of viable communities of aquatic organises and populations of
significant aquatic species which have optimal growing temperatures below
18 degrees C.
Haters which are suitable or intended to be iade suitable for protection and
•aintenance of viable communities of aquatic organists and populations of
significant aquatic species which have optiial growing temperatures above
IS degrees C.*
Haters which provide or could provide a habitat for active self-propagating
populations of salionid fish.
Surface waters which are suitable or intended to be tade suitable for prolonged
and intiaate contact by (weans or for recreational activities when the ingestion
of small quantities of water is likely to occur. Such waters include, but are
not restricted to, those used for swining, water skiing or skin diving.
Surface waters which are suitable or intended to be made suitable for
recreational uses on or about the water which are not included in the primary
contact category. These waters may be used for fishing, boating, wading and
other activities where ingestion of raw water is not probable.
Surface waters not specified in Idaho Department of Health and Helfare Rules and
Regulations Section 01.2110 — 01.2160 are designated as primary contact
recreational waters, unless the physical characteristics of a water body
prevent primary contact recreation. In those cases, the water body is
designated a secondary contact recreational water.
All State waters are designated for the uses of industrial water supplies, wild-
life habitat and aesthetics. Hater quality criteria for those uses will
generally be satisfied by the general water quality standards (Idaho Dept. of
Health t Helfare Rules and Regulations Section 01.2200). Should specificity be
desirable or necessary to protect a specific use, appropriate criteria will be
adopted in Idaho Dept. of Health 4 Helfare Rules and Regulations Sections
01.2250 or 01.2275 - 01.2299.
Unless designated in Idaho Dept. of Health & Helfare Rules and Regulations
Sections 01.2110 — 01.2160, man-made waterways are to be protected for the use
for which they were developed.
Unless designated in Idaho Dept. of Health 4 Helfare Rules and Regulations
Sections 01.2110 — 01.2160, lakes, ponds, pools, streams and springs outside
public lands taut located wholly and entirely upon a person's land are not
protected specifically or generally for any beneficial use.
ID-3
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IDAHO
Physical
pH
Upper Value
Loner Value
Dissolved Oxygen
Loner Value
Teiperature
Upper Value
Turbidity
Upper Value
Nutrients
Auonia, Tot.
Upper Value
Nitrate
Upper Value
Toxic Metals
Arsenic
Upper Value
Cadiiui
Upper Value
Chrotiui - Total
Upper Value
Cyanide
Upper Value
Lead
Upper Value
Mercury
Upper Value
Bariui
Upper Value
Seleniui
Upper Value
Silver
Upper Value
Pesticides
2,4 D
Upper Value
2,4,5-TP Silvex
Upper Value
Endrin
Upper Value
Lindane
Upper Value
Nethoxychlor
Upper Value
Toxaphene
Upper Value
Organics
All
Classes
9.0
6.5
Agricultural
Domestic
Cold Hater Biot.
Narr.
10 ig/L as N
0.05 ig/L
0.01 ig/L
0.05 ig/L
0.02 ig/L
0.05 ig/L
0.002 ig/L
1.000 ig/L
0.01 ig/L
0.05 ig/L
0.100 ig/L
0.01 ig/L
0.0002 ig/L
0.004 ig/L
0.100 ig/L
0.005 ig/L
6 ig/L
22 C
Narr.
ID-4
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Bacteria
All .
Classes
Total Col if on
Upper Value
Agricultural Doiestic
Narr.
Cold Water Biot.
. ID-5
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IDAHO
Nan Hater Blot.. Salionid Spaimi.. Prinary Contact Secondary Conta..
Physical
Dissolved Oxygen
Loner Value
Teiperature
Upper Value
Nutrients
Aitonia, Tot.
Upper Value
Toxic Metals
Pesticides
Organics
Bacteria
Fecal Colifori
Upper Value
5
33
Narr.
•g/L
C
6
13
Narr.
•g/L
C
500 /100 iL. 800 /100
ID-6
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IDAHO
Unspecified Sur.. Industrial Hate.. Man-Hade Haterw.. Private Haters
Physical
Nutrients
Toxic Metals
Pesticides
Organics
Bacteria
ID-7
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