Idaho Administrative Code
Title IDAPA 58 - Environmental Quality, Department of
Rule 58.01.02 - WATER QUALITY STANDARDS
Section 58.01.02.287 - SITE-SPECIFIC AQUATIC LIFE CRITERIA FOR SELENIUM
Current through August 31, 2023
Site-specific water column values (30-day average) are based on dissolved total selenium in water and are derived using a performance-based approach from fish tissue values via either the mechanistic modeling or empirical bioaccumulation factor (BAF) method in Aquatic Life Ambient Water Quality Criterion for Selenium - Freshwater, EPA-822-R-16-006, Appendix K: Translation of a Selenium Fish Tissue Criterion Element to a Site-Specific Water Column Value (June 2016). (3-31-22)
01. Subsection of Blackfoot Subbasin. Blackfoot River - confluence of Lanes and Diamond Creeks to Blackfoot Reservoir (unit US-10), and all tributaries thereof. Site-specific egg-ovary, whole-body, and muscle criterion elements for these water bodies are set out in the following table. The lentic and short-term exposure water column criterion elements set out in Subsection 210.01., table footnote l., are also applicable to the water bodies identified in this subsection.
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Chronic |
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Egg-Ovary (mg/kg dw) |
Fish Tissue (mg/kg dw) |
Water Column (µg/L) |
|
|
Egg-Ovary |
Whole-Body |
Muscle |
Water Lotic |
|
24.51 |
12.52 |
12.82 |
11.93,4,5 |
|
mg/kg dw - milligrams per kilogram dry weight, µg/L - micrograms per liter |
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1. Egg-ovary supersedes any whole-body, muscle, or water column element when fish egg-ovary concentrations are measured. Single measurement of an average or composite sample of at least five (5) individuals of the same species. Not to be exceeded; DEQ will evaluate all representative egg-ovary data to determine compliance with this criterion element. 2. Fish whole-body or muscle tissue supersedes water column element when both fish tissue and water concen-trations are measured. Single measurement of an average or composite sample of at least five (5) individuals of the same species where the smallest individual is no less than seventy-five percent (75%) of the total length (size) of the largest individual. Not to be exceeded; DEQ will evaluate all representative whole-body or muscle data to determine compliance with this criterion element. 3. Water column values are derived using the empirical BAF method. For comparative purposes only, the exam-ple value displayed in this table represents the lotic water column value for Sheep Creek based on the average BAF for Cutthroat Trout among all sampling locations and years. 4. Lotic Water Column Equation= where Tissue criterion is the fish tissue element (whole-body), and BAF is the bioaccumulation factor derived by dividing site-specific field-collected samples of fish tissue (whole-body) by site-specific field-collected samples of water. 5. Water column values are the applicable criterion element in the absence of steady-state condition fish tissue data. In fishless waters, surface water from the fishless waters and fish tissue from the nearest downstream waters are used for bioaccumulation modeling. Fish tissue supersedes any site-specific water column values when fish are sampled downstream of fishless waters. |
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(3-31-22)
02. Subsection of Bear Lake Subbasin. Georgetown Creek - source to mouth (unit B-22), and all tributaries thereof. Site-specific egg-ovary, whole-body, and muscle criterion elements for these water bodies are set out in the following table. The lentic and short-term water column criterion elements set out in Subsection 210.01., table footnote l., are also applicable to the water bodies identified in this subsection.
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Chronic |
|||
|
Egg-Ovary (mg/kg dw) |
Fish Tissue (mg/kg dw) |
Water Column (µg/L) |
|
|
Egg-Ovary |
Whole-Body |
Muscle |
Water Lotic |
|
21.01 |
12.52 |
12.82 |
3.83,4,5 |
|
mg/kg dw - milligrams per kilogram dry weight, µg/L - micrograms per liter |
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1. Egg-ovary supersedes any whole-body, muscle, or water column element when fish egg-ovary concentrations are measured. Single measurement of an average or composite sample of at least five (5) individuals of the same species. Not to be exceeded; DEQ will evaluate all representative egg-ovary data to determine compliance with this criterion element. 2. Fish whole-body or muscle tissue supersedes water column element when both fish tissue and water concen-trations are measured. Single measurement of an average or composite sample of at least five (5) individuals of the same species where the smallest individual is no less than seventy-five percent (75%) of the total length (size) of the largest individual. Not to be exceeded; DEQ will evaluate all representative whole-body and muscle data to determine compliance with this criterion element. 3. Water column values are derived using the empirical BAF method. For comparative purposes only, the exam-ple displayed in this table represents the lotic water column value for Georgetown Creek, upstream of the intermittent reach, based on the average BAF for Brook Trout in all sampling locations and years. 4. Lotic Water Column Equation= where Tissue criterion is the fish tissue element (whole-body), and BAF is the bioaccumulation factor derived by dividing site-specific field-collected samples of fish tissue (whole-body) by site-specific field-collected samples of water. 5. Water column values are the applicable criterion element in the absence of steady-state condition fish tissue data. In fishless waters, surface water from the fishless waters and fish tissue from the nearest downstream waters are used for bioaccumulation modeling. Fish tissue supersedes any site-specific water column values when fish are sampled downstream of fishless waters. |
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(3-31-22)
03. Subsection of Salt Subbasin - Sage Creek. Sage Creek - source to mouth (unit US-9) including, Hoopes Spring channel downstream of the spring complex, South Fork Sage Creek downstream of the spring complex, Sage Creek downstream of the confluence of Hoopes Spring with Sage Creek to its confluence with Crow Creek, and tributaries; excluding North Fork Sage Creek, Pole Canyon Creek, and their tributaries. Site-specific eggovary and whole-body criterion elements for these water bodies are set out in the following table. The muscle, lentic water column, and short-term water column criterion elements set out in Subsection 210.01., table footnote l., are also applicable to the water bodies identified in this subsection.
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Chronic |
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Egg-Ovary (mg/kg dw) |
Fish Tissue (mg/l<g dw) |
Water Column (|jg/L) |
|
Egg-Ovary |
Whole-Body |
Water Lotic |
|
20.51 |
13.62 |
16.73 |
|
mg/kg dw- milligrams per kilogram dry weight, µg/L- micrograms per liter |
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1 Egg-ovary supersedes any whole-body muscle, or water column element when fish egg-ovary concentrations are measured Single measurement of an average or composite sample of at least five (5) individuals of the same species Not to be exceeded, DEQ will evaluate all representative egg-ovary data to determine compliance with this cnterion element. 2. Fish tissue supersedes water column element when both fish tissue (whole-body) and water concentrations are measured Fish tissue elements are expressed as a single arithmetic average of tissue concentrations from at least five (5) individuals of the same species where the smallest individual is no less than seventy-five percent (75%) of the total length (size) of the largest individual Not to be exceeded, DEQ will evaluate all representative whole-body data to determine compliance with this criterion element. 3. Water column values are denved using the empincal BAF method Water column values are the applicable cri-tenon element in the absence of steady-state condition fish tissue data In fishless waters, selenium concentrations in fish from the nearest downstream waters may be used to assess compliance |
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(3-31-22)
04. Subsection of Salt Subbasin - Crow Creek. Crow Creek - Downstream of Sage Creek confluence to Wyoming state line (US-8). Site-specific egg-ovary and whole-body criterion elements for these water bodies are set out in the following table. The muscle, lentic water column, and short-term water column criterion elements set out in Subsection 210.01., table footnote l., are also applicable to the water bodies identified in this subsection.
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Chronic |
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Egg-Ovary (mg/kg dw) |
Fish Tissue (mg/kg dw) |
Water Column (µg/L) |
|
Egg-Ovary |
Whole-Body |
Water Lotic |
|
20.51 |
12.52 |
4.23 |
|
mg/kg dw- milligrams per kilogram dry weight, µg/L- micrograms per liter |
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1. Egg-ovary supersedes any whole-body muscle, or water column element when fish egg-ovary concentrations are measured. Single measurement of an average or composite sample of at least five (5) individuals of the same species. Not to be exceeded; DEQ will evaluate all representative egg-ovary data to determine compliance with this criterion element. 2. Fish tissue supersedes water column element when both fish tissue (whole-body) and water concentrations are measured. Fish tissue elements are expressed as a single arithmetic average of tissue concentrations from at least five (5) individuals of the same species where the smallest individual is no less than seventy-five percent (75%) of the total length (size) of the largest individual. Not to be exceeded; DEQ will evaluate all representative whole-body data to determine compliance with this criterion element. 3. Water column values are derived using the empirical BAF method. Water column values are the applicable cri-terion element in the absence of steady-state condition fish tissue data. In fishless waters, selenium concentrations in fish from the nearest downstream waters may be used to assess compliance. |
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(3-31-22)
05. Portions of Idaho. (3-31-22)
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HUC |
Subbasin |
HUC |
Subbasin |
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|
16010102 |
Central Bear |
17040208 |
Portneuf |
|
|
16010201 |
Bear Lake |
17040209 |
Lake Walcott |
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|
16010202 |
Middle Bear |
17040210 |
Raft |
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|
16010203 |
Little Bear-Logan |
17040211 |
Goose |
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|
16010204 |
Lower Bear-Malad |
17040214 |
Beaver-Camas |
|
|
16020309 |
Curlew Valley |
17040215 |
Medicine Lodge |
|
|
17010302 |
South Fork Coeurd Alene |
17040216 |
Birch |
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|
17010306 |
Hangman |
17040218 |
Big Lost |
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|
17010308 |
Little Spokane |
17040220 |
Camas |
|
|
17040104 |
Palisades |
17040221 |
Little Wood |
|
|
17040105 |
Salt |
17050104 |
Upper Owyhee |
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|
17040201 |
Idaho Falls |
17050105 |
South Fork Owyhee |
|
|
17040202 |
Upper Henrys |
17050106 |
East Little Owyhee |
|
|
17040203 |
Lower Henrys |
17050107 |
Middle Owyhee |
|
|
17040204 |
Teton |
17050108 |
Jordan |
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|
17040205 |
Willow |
17060109 |
Rock |
|
|
17040206 |
American Falls |
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|
17040207 |
Blackfoot |
(3-31-22)
|
Chronic |
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|
Egg-Ovary (mg/kg dw) |
Fish Tissue (mg/kg dw) |
|
|
Egg-Ovary |
Whole-Body |
Muscle |
|
19.01 |
9.52 |
13.12 |
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mg/kg dw - milligrams per kilogram dry weight, µg/L - micrograms per liter |
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|
1. Egg-ovary supersedes any whole-body, muscle, or water column element when fish egg-ovary concentrations are measured. Single measurement of an average or composite sample of at least five (5) individuals of the same species. Not to be exceeded; DEQ will evaluate all representative egg-ovary data to determine compliance with this criterion element. 2. Fish whole-body or muscle tissue supersedes water column element when both fish tissue and water concen-trations are measured. Single measurement of an average or composite sample of at least five (5) individuals of the same species where the smallest individual is no less than seventy-five percent (75%) of the total length (size) of the largest individual. Not to be exceeded; DEQ will evaluate all representative whole-body or muscle data to determine compliance with this criterion element. |
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(3-31-22)
