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Assessment Data for the State of Idaho Year 2002
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Impaired Water Information
Other Water Assessment Information
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State of Idaho websites: | State 305(b) Water Quality Assessment Report(s) |
| State Water Quality Program |
Search for a Waterbody within Idaho
Total Assessed Waters for the State of Idaho
Description of this table| Size Of Water | ||||||||
|---|---|---|---|---|---|---|---|---|
| Rivers, Streams, Creeks (Miles) | Lakes, Ponds, Reservoir (Acres) | Bays, Estuaries (Square Miles) | Coastal Shorelines (Miles) | Oceans, Near Coastal Waters (Square Miles) | Wetlands (Acres) | Great Lakes Shoreline (Miles) | Great Lakes Open Water (Square Miles) | |
| Total Assessed Waters | 50,584.25 | 203,194.24 | .00 | .00 | .00 | .00 | .00 | .00 |
| Estimated Total Water Size in ID | 115,595.00 | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable |
| Percent of Waters Assessed | 43.76 | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable |
Assessed Waters of Idaho by Watershed
Description of this table| Watershed | Size of Water | |||||||
|---|---|---|---|---|---|---|---|---|
| Rivers, Streams, Creeks (Miles) | Lakes, Ponds, Reservoir (Acres) | Bays, Estuaries (Square Miles) | Coastal Shorelines (Miles) | Oceans, Near Coastal Waters (Square Miles) | Wetlands (Acres) | Great Lakes Shoreline (Miles) | Great Lakes Open Water (Square Miles) | |
| AMERICAN FALLS | 731.54 | 55,551.12 | .00 | .00 | .00 | .00 | .00 | .00 |
| BEAR LAKE | 653.72 | 1,018.91 | .00 | .00 | .00 | .00 | .00 | .00 |
| BEAVER-CAMAS | 614.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BIG LOST | 1,168.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BIG WOOD | 1,295.03 | 3,565.72 | .00 | .00 | .00 | .00 | .00 | .00 |
| BIRCH | 59.13 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BLACKFOOT | 914.25 | 11.65 | .00 | .00 | .00 | .00 | .00 | .00 |
| BOISE-MORES | 511.35 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BROWNLEE RESERVOIR | 512.21 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BRUNEAU | 1,089.84 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| C. J. STRIKE RESEVOIR | 765.47 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CAMAS | 556.74 | 1,583.94 | .00 | .00 | .00 | .00 | .00 | .00 |
| CENTRAL BEAR | 112.81 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CLEARWATER | 1,766.43 | 86.49 | .00 | .00 | .00 | .00 | .00 | .00 |
| COEUR D'ALENE LAKE | 293.73 | 28,783.41 | .00 | .00 | .00 | .00 | .00 | .00 |
| CURLEW VALLEY | 32.65 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| GOOSE | 589.29 | 1,005.71 | .00 | .00 | .00 | .00 | .00 | .00 |
| HANGMAN | 215.05 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| HELLS CANYON | 187.69 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| IDAHO FALLS | 95.49 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| JORDAN | 441.91 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LAKE WALCOTT | 1,059.85 | 8,389.19 | .00 | .00 | .00 | .00 | .00 | .00 |
| LEMHI | 500.28 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LITTLE BEAR-LOGAN | 42.73 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LITTLE LOST | 625.26 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LITTLE SALMON | 447.14 | 214.98 | .00 | .00 | .00 | .00 | .00 | .00 |
| LITTLE WOOD | 531.60 | 950.11 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOCHSA | 824.38 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER BEAR-MALAD | 437.25 | 81.73 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER BOISE | 809.01 | 6,056.53 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER CLARK FORK | 178.29 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER HENRYS | 109.85 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER KOOTENAI | 564.16 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER MIDDLE FORK SALMON | 839.02 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER NORTH FORK CLEARWATER | 344.80 | 259.67 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER SALMON | 466.11 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER SELWAY | 869.94 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER SNAKE-ASOTIN | 49.59 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MEDICINE LODGE | 377.01 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MIDDLE BEAR | 548.91 | 420.08 | .00 | .00 | .00 | .00 | .00 | .00 |
| MIDDLE FORK CLEARWATER | 80.03 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MIDDLE FORK PAYETTE | 276.05 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MIDDLE OWYHEE | 304.13 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MIDDLE SALMON-CHAMBERLAIN | 1,003.43 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MIDDLE SALMON-PANTHER | 1,155.15 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MIDDLE SNAKE-PAYETTE | 73.58 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MIDDLE SNAKE-SUCCOR | 1,596.81 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MOYIE | 186.75 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NORTH AND MIDDLE FORKS BOISE | 787.53 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NORTH FORK PAYETTE | 682.22 | 704.43 | .00 | .00 | .00 | .00 | .00 | .00 |
| PAHSIMEROI | 550.77 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PALISADES | 526.24 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PALOUSE | 379.66 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PAYETTE | 664.69 | 7.52 | .00 | .00 | .00 | .00 | .00 | .00 |
| PEND OREILLE LAKE | 679.71 | 83,229.11 | .00 | .00 | .00 | .00 | .00 | .00 |
| PORTNEUF | 1,308.18 | 72.62 | .00 | .00 | .00 | .00 | .00 | .00 |
| PRIEST | 584.52 | 36.07 | .00 | .00 | .00 | .00 | .00 | .00 |
| RAFT | 574.79 | 79.07 | .00 | .00 | .00 | .00 | .00 | .00 |
| SALMON FALLS | 301.25 | 972.06 | .00 | .00 | .00 | .00 | .00 | .00 |
| SALT | 334.02 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SOUTH FORK BOISE | 1,262.79 | 84.88 | .00 | .00 | .00 | .00 | .00 | .00 |
| SOUTH FORK CLEARWATER | 1,081.09 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SOUTH FORK COEUR D'ALENE | 269.29 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SOUTH FORK OWYHEE | 32.48 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SOUTH FORK PAYETTE | 246.83 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SOUTH FORK SALMON | 778.13 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ST. JOE | 1,375.09 | 27,968.26 | .00 | .00 | .00 | .00 | .00 | .00 |
| TETON | 652.15 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER COEUR D'ALENE | 785.31 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER HENRYS | 445.26 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER KOOTENAI | 14.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER MIDDLE FORK SALMON | 1,290.91 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER NORTH FORK CLEARWATER | 448.25 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER OWYHEE | 958.15 | 242.16 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER SALMON | 2,071.88 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER SELWAY | 943.39 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER SNAKE-ROCK | 1,046.58 | 1,088.50 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER SPOKANE | 64.89 | 6,168.47 | .00 | .00 | .00 | .00 | .00 | .00 |
| WEISER | 485.63 | 2,315.77 | .00 | .00 | .00 | .00 | .00 | .00 |
| WILLOW | 712.37 | 128.16 | .00 | .00 | .00 | .00 | .00 | .00 |
| Name Not Reported | 1,383.03 | 86.18 | .00 | .00 | .00 | .00 | .00 | .00 |
Idaho Assessed Waters
Individual Use Support for Rivers and Streams
Description of this table
| State Designated Use | Total Miles Assessed | Percent Good | Percent Threatened | Percent Impaired |  % Good |
|
|---|---|---|---|---|---|---|
 % Threatened |
||||||
 % Impaired |
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 |
Fish, Shellfish, and Wildlife Protection and Propagation | 46,879.74 | 41.79 | .00 | 58.21 | |
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Recreation | 28,989.79 | 78.24 | .00 | 21.76 | |
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Public Water Supply | 3,998.68 | 93.58 | .00 | 6.42 | |
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Aesthetic Value | 5,255.37 | 89.25 | .00 | 10.75 | |
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Industrial | 1,686.25 | 80.18 | .00 | 19.82 | |
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Agricultural | 786.85 | 68.88 | .00 | 31.12 | |
Idaho Assessed Waters
Water Quality Attainment for Rivers and Streams
Description of this table
| Attainment Status | Miles | Percent of Assessed |
| Good | 19,094.24 | 37.75 |
| Threatened | .00 | .00 |
| Impaired | 31,490.01 | 62.25 |
| Total Miles Assessed | 50,584.25 | 100.00 |
Idaho Top Causes of Impairments
for Rivers and Streams
Description of this table
| # | State Cause Name | Total Miles Impaired |
|---|---|---|
| 1 | SEDIMENTATION/SILTATION | 14,609.72 |
| 2 | TEMPERATURE, WATER | 7,505.07 |
| 3 | CAUSE UNKNOWN | 7,426.30 |
| 4 | NUTRIENTS | 5,531.80 |
| 5 | FLOW ALTERATION | 5,260.62 |
| 6 | OTHER HABITAT ALTERATIONS | 3,226.05 |
| 7 | BACTERIA | 3,223.00 |
| 8 | ORGANIC ENRICHMENT/LOW DO | 2,059.31 |
| 9 | PATHOGENS | 1,568.55 |
| 10 | AMMONIA (UNIONIZED) - TOXIN | 453.69 |
Idaho Top Probable Sources of Impairments
for Rivers and Streams
No Probable Sources Reported.
Idaho Assessed Waters
Individual Use Support for Lakes, Ponds and Reservoirs
Description of this table
| State Designated Use | Total Acres Assessed | Percent Good | Percent Threatened | Percent Impaired | % Good |
|
|---|---|---|---|---|---|---|
| % Threatened |
||||||
| % Impaired |
||||||
|
Fish, Shellfish, and Wildlife Protection and Propagation | 193,795.50 | .02 | .00 | 99.98 | |
|
Recreation | 10,240.51 | 2.33 | .00 | 97.67 | |
|
Public Water Supply | 122.61 | 100.00 | .00 | .00 | |
Idaho Assessed Waters
Water Quality Attainment for Lakes, Ponds and Reservoirs
Description of this table
| Attainment Status | Acres | Percent of Assessed |
| Good | 33.61 | .02 |
| Threatened | .00 | .00 |
| Impaired | 203,160.63 | 99.98 |
| Total Acres Assessed | 203,194.24 | 100.00 |
Idaho Top Causes of Impairments
for Lakes, Ponds and Reservoirs
Description of this table
| # | State Cause Name | Total Acres Impaired |
|---|---|---|
| 1 | FLOW ALTERATION | 96,151.61 |
| 2 | NUTRIENTS | 88,456.13 |
| 3 | SEDIMENTATION/SILTATION | 85,047.50 |
| 4 | TOTAL TOXICS | 80,827.85 |
| 5 | ORGANIC ENRICHMENT/LOW DO | 78,782.69 |
| 6 | METALS | 27,968.26 |
| 7 | BACTERIA | 9,305.41 |
| 8 | OIL AND GREASE | 8,396.71 |
| 9 | TEMPERATURE, WATER | 5,114.59 |
| 10 | OTHER HABITAT ALTERATIONS | 3,890.23 |
Idaho Top Probable Sources of Impairments
for Lakes, Ponds and Reservoirs
No Probable Sources Reported.
Idaho
Causes of Impairment
Description of this table| State Cause Name | Size of Assessed Waters with Listed Causes of Impairment | |||||||
|---|---|---|---|---|---|---|---|---|
| Rivers, Streams, Creeks (Miles) | Lakes, Ponds, Reservoir (Acres) | Bays, Estuaries (Square Miles) | Coastal Shorelines (Miles) | Oceans, Near Coastal Waters (Square Miles) | Wetlands (Acres) | Great Lakes Shoreline (Miles) | Great Lakes Open Waters (Squar Miles) | |
| ZINC | 63.84 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CAUSE UNKNOWN | 7,426.30 | 338.52 | .00 | .00 | .00 | .00 | .00 | .00 |
| TOTAL SUSPENDED SOLIDS (TSS) | 245.11 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| METALS | 452.36 | 27,968.26 | .00 | .00 | .00 | .00 | .00 | .00 |
| ORGANIC | 17.72 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PATHOGENS | 1,568.55 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| OTHER INORGANICS | 1.01 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TOTAL DISSOLVED GAS | 89.37 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| AMMONIA (UNIONIZED) - TOXIN | 453.69 | 1,223.17 | .00 | .00 | .00 | .00 | .00 | .00 |
| LEAD | 1.98 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TEMPERATURE, WATER | 7,505.07 | 5,114.59 | .00 | .00 | .00 | .00 | .00 | .00 |
| ORGANIC ENRICHMENT/LOW DO | 2,059.31 | 78,782.69 | .00 | .00 | .00 | .00 | .00 | .00 |
| MERCURY | 211.49 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TOTAL TOXICS | 10.35 | 80,827.85 | .00 | .00 | .00 | .00 | .00 | .00 |
| CADMIUM | 63.84 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SELENIUM | 21.07 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| OIL AND GREASE | 413.85 | 8,396.71 | .00 | .00 | .00 | .00 | .00 | .00 |
| FLOW ALTERATION | 5,260.62 | 96,151.61 | .00 | .00 | .00 | .00 | .00 | .00 |
| NUTRIENTS | 5,531.80 | 88,456.13 | .00 | .00 | .00 | .00 | .00 | .00 |
| PHOSPHORUS, ELEMENTAL | 88.14 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SEDIMENTATION/SILTATION | 14,609.72 | 85,047.50 | .00 | .00 | .00 | .00 | .00 | .00 |
| PH | 147.30 | 666.17 | .00 | .00 | .00 | .00 | .00 | .00 |
| BACTERIA | 3,223.00 | 9,305.41 | .00 | .00 | .00 | .00 | .00 | .00 |
| SALINITY | 31.88 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PESTICIDES | 362.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| OTHER HABITAT ALTERATIONS | 3,226.05 | 3,890.23 | .00 | .00 | .00 | .00 | .00 | .00 |
Idaho
Probable Sources Contributing to Impairment
No Source Data Reported by the State.
