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Assessment Data for the State of Iowa Year 2004
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State of Iowa websites: | State 305(b) Water Quality Assessment Report(s) |
| State Water Quality Program |
Search for a Waterbody within Iowa
Total Assessed Waters for the State of Iowa
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) | Inland Lake Shoreline (Miles) | |
| Total Assessed Waters | 7,830.16 | 86,310.00 | .00 | .00 | .00 | 36,323.00 | .00 | .00 | .00 |
| Estimated Total Water Size in IA | 71,665.00 | 202,216.00 | Unavailable | Unavailable | Unavailable | 125,155.00 | Unavailable | Unavailable | Unavailable |
| Percent of Waters Assessed | 10.93 | 42.68 | Unavailable | Unavailable | Unavailable | 29.02 | Unavailable | Unavailable | Unavailable |
Assessed Waters of Iowa by Watershed (8 Digit USGS Cataloging Unit)
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) | Inland Lake Shoreline (Miles) | |
| 8-digit HUC Name Not Reported | 5.76 | 77.00 | .00 | .00 | .00 | 4,245.00 | .00 | .00 | .00 |
| APPLE-PLUM | 113.87 | .00 | .00 | .00 | .00 | 526.00 | .00 | .00 | .00 |
| BEAR-WYACONDA | 62.88 | 110.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BIG PAPILLION-MOSQUITO | 167.17 | 1,854.00 | .00 | .00 | .00 | 102.00 | .00 | .00 | .00 |
| BLACKBIRD-SOLDIER | 156.31 | 462.00 | .00 | .00 | .00 | 3,136.00 | .00 | .00 | .00 |
| BLUE EARTH | 10.38 | .00 | .00 | .00 | .00 | 1,354.00 | .00 | .00 | .00 |
| BOONE | 136.65 | 302.00 | .00 | .00 | .00 | 1,507.00 | .00 | .00 | .00 |
| BOYER | 109.42 | 79.00 | .00 | .00 | .00 | 9.00 | .00 | .00 | .00 |
| COON-YELLOW | 120.91 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| COPPERAS-DUCK | 108.75 | 56.00 | .00 | .00 | .00 | 3,730.00 | .00 | .00 | .00 |
| EAST FORK DES MOINES | 212.02 | 2,419.00 | .00 | .00 | .00 | 1,215.00 | .00 | .00 | .00 |
| EAST NISHNABOTNA | 103.94 | 287.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FLINT-HENDERSON | 68.31 | 18.00 | .00 | .00 | .00 | 55.00 | .00 | .00 | .00 |
| FLOYD | 90.05 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| GRANT-LITTLE MAQUOKETA | 100.01 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| KEG-WEEPING WATER | 85.17 | 20.00 | .00 | .00 | .00 | 268.00 | .00 | .00 | .00 |
| LAKE RED ROCK | 292.13 | 20,623.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LITTLE SIOUX | 465.86 | 14,579.00 | .00 | .00 | .00 | 4,344.00 | .00 | .00 | .00 |
| LOWER BIG SIOUX | 147.88 | 63.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER CEDAR | 224.00 | .00 | .00 | .00 | .00 | 310.00 | .00 | .00 | .00 |
| LOWER DES MOINES | 271.59 | 1,203.00 | .00 | .00 | .00 | 33.00 | .00 | .00 | .00 |
| LOWER IOWA | 173.86 | 112.00 | .00 | .00 | .00 | 725.00 | .00 | .00 | .00 |
| LOWER WAPSIPINICON | 135.18 | .00 | .00 | .00 | .00 | 245.00 | .00 | .00 | .00 |
| MAPLE | 136.91 | 72.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MAQUOKETA | 352.38 | 59.00 | .00 | .00 | .00 | 447.00 | .00 | .00 | .00 |
| MIDDLE CEDAR | 281.01 | 750.00 | .00 | .00 | .00 | 150.00 | .00 | .00 | .00 |
| MIDDLE DES MOINES | 280.16 | 7,716.00 | .00 | .00 | .00 | 268.00 | .00 | .00 | .00 |
| MIDDLE IOWA | 124.00 | 5,945.00 | .00 | .00 | .00 | 4,221.00 | .00 | .00 | .00 |
| MONONA-HARRISON DITCH | 57.02 | .00 | .00 | .00 | .00 | 70.00 | .00 | .00 | .00 |
| NISHNABOTNA | 5.39 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NODAWAY | 18.61 | 744.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NORTH RACCOON | 291.36 | 4,810.00 | .00 | .00 | .00 | 1,469.00 | .00 | .00 | .00 |
| NORTH SKUNK | 154.56 | 918.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ONE HUNDRED AND TWO | 7.60 | 138.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PLATTE | 23.47 | 411.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ROCK | 136.85 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SHELL ROCK | 124.94 | 316.00 | .00 | .00 | .00 | 1,109.00 | .00 | .00 | .00 |
| SKUNK | 183.57 | 701.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SOUTH RACCOON | 126.39 | 161.00 | .00 | .00 | .00 | 270.00 | .00 | .00 | .00 |
| SOUTH SKUNK | 200.02 | 429.00 | .00 | .00 | .00 | 240.00 | .00 | .00 | .00 |
| TARKIO-WOLF | 18.17 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| THOMPSON | 64.95 | 2,432.00 | .00 | .00 | .00 | 4.00 | .00 | .00 | .00 |
| TURKEY | 363.73 | 156.00 | .00 | .00 | .00 | 62.00 | .00 | .00 | .00 |
| UPPER CEDAR | 168.49 | 30.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER CHARITON | 197.47 | 11,359.00 | .00 | .00 | .00 | 498.00 | .00 | .00 | .00 |
| UPPER DES MOINES | 128.18 | 1,992.00 | .00 | .00 | .00 | 2,164.00 | .00 | .00 | .00 |
| UPPER GRAND | 4.53 | 234.00 | .00 | .00 | .00 | 60.00 | .00 | .00 | .00 |
| UPPER IOWA | 199.83 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER IOWA | 187.06 | 408.00 | .00 | .00 | .00 | 1,207.00 | .00 | .00 | .00 |
| UPPER WAPSIPINICON | 300.14 | 40.00 | .00 | .00 | .00 | 980.00 | .00 | .00 | .00 |
| WEST FORK CEDAR | 149.08 | 100.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| WEST NISHNABOTNA | 178.53 | 219.00 | .00 | .00 | .00 | 1,050.00 | .00 | .00 | .00 |
| WEST NODAWAY | 46.14 | 222.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| WINNEBAGO | 101.06 | 3,684.00 | .00 | .00 | .00 | 1,250.00 | .00 | .00 | .00 |
Iowa 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 |
|||||
| AQUATIC LIFE SUPPORT | 7,280.98 | 24.17 | 38.41 | 37.41 | |
| DRINKING WATER | 180.26 | 28.86 | 18.32 | 52.81 | |
| FISH CONSUMPTION | 1,687.40 | 96.92 | 3.08 | .00 | |
| OVERALL USE SUPPORT | 7,830.16 | 23.85 | 33.55 | 42.60 | |
| PRIMARY BODY CONTACT | 952.31 | 26.11 | 4.84 | 69.05 | |
Iowa Assessed Waters
Water Quality Attainment for Rivers and Streams
Description of this table
| Attainment Status | Miles | Percent of Assessed |
| Good | 1,867.56 | 23.85 |
| Threatened | 2,626.89 | 33.55 |
| Impaired | 3,335.71 | 42.60 |
| Total Miles Assessed | 7,830.16 | 100.00 |
Iowa Top Causes of Impairments
for Rivers and Streams
Description of this table
| # | State Cause Name | Total Miles Impaired |
|---|---|---|
| 1 | OTHER HABITAT ALTERATIONS | 2,672.33 |
| 2 | SEDIMENTATION/SILTATION | 1,439.85 |
| 3 | ORGANIC ENRICHMENT/LOW DO | 1,016.13 |
| 4 | AMMONIA (UN-IONIZED) | 707.33 |
| 5 | PATHOGENS | 681.87 |
| 6 | NUTRIENTS | 640.53 |
| 7 | FLOW ALTERATION | 489.12 |
| 8 | IMPAIRMENT UNKNOWN | 464.51 |
| 9 | PESTICIDES | 184.23 |
| 10 | UNKNOWN TOXICITY | 113.94 |
Iowa Top Probable Sources of Impairments
for Rivers and Streams
Description of this table
| # | State Source Name | Total Miles Impaired by Source |
|---|---|---|
| 1 | SOURCE UNKNOWN | 2,069.65 |
| 2 | AGRICULTURE | 1,770.35 |
| 3 | CHANNELIZATION | 1,622.95 |
| 4 | HYDROMODIFICATION | 1,518.25 |
| 5 | STREAMBANK MODIFICATIONS/DESTABLIZATION | 1,182.43 |
| 6 | HABITAT MODIFICATION (OTHER THAN HYDROMODIFICATION) | 1,075.24 |
| 7 | NATURAL SOURCES | 671.28 |
| 8 | PASTURE GRAZING - RIPARIAN | 604.43 |
| 9 | LOSS OF RIPARIAN HABITAT | 512.89 |
| 10 | LIVESTOCK (GRAZING OR FEEDING OPERATIONS) | 491.77 |
Iowa 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 |
|||||
| AQUATIC LIFE SUPPORT | 84,883.00 | 30.63 | 54.73 | 14.65 | |
| DRINKING WATER | 22,111.00 | 39.58 | 57.08 | 3.34 | |
| FISH CONSUMPTION | 59,758.00 | 67.02 | 32.11 | .88 | |
| OVERALL USE SUPPORT | 86,310.00 | 8.06 | 56.02 | 35.93 | |
| PRIMARY BODY CONTACT | 82,698.00 | 13.23 | 51.65 | 35.12 | |
Iowa Assessed Waters
Water Quality Attainment for Lakes, Ponds and Reservoirs
Description of this table
| Attainment Status | Acres | Percent of Assessed |
| Good | 6,955.00 | 8.06 |
| Threatened | 48,348.00 | 56.02 |
| Impaired | 31,007.00 | 35.93 |
| Total Acres Assessed | 86,310.00 | 100.00 |
Iowa Top Causes of Impairments
for Lakes, Ponds and Reservoirs
Description of this table
| # | State Cause Name | Total Acres Impaired |
|---|---|---|
| 1 | TURBIDITY | 50,889.00 |
| 2 | NON-NATIVE AQUATIC PLANTS | 42,702.00 |
| 3 | NUTRIENTS | 28,631.00 |
| 4 | SUSPENDED ALGAE | 25,966.00 |
| 5 | ORGANIC ENRICHMENT/LOW DO | 25,472.00 |
| 6 | ATRAZINE | 12,923.00 |
| 7 | TOTAL SUSPENDED SOLIDS (TSS) | 10,716.00 |
| 8 | PATHOGENS | 10,259.00 |
| 9 | SEDIMENTATION/SILTATION | 7,677.00 |
| 10 | NONNATIVE FISH, SHELLFISH, OR ZOOPLANKTON | 2,097.00 |
Iowa Top Probable Sources of Impairments
for Lakes, Ponds and Reservoirs
Description of this table
| # | State Source Name | Total Acres Impaired by Source |
|---|---|---|
| 1 | INTERNAL NUTRIENT RECYCLING | 64,137.00 |
| 2 | SEDIMENT RESUSPENSION | 51,077.00 |
| 3 | AGRICULTURE | 30,896.00 |
| 4 | NATURAL SOURCES | 29,676.00 |
| 5 | SOURCE UNKNOWN | 23,134.00 |
| 6 | OTHER | 812.00 |
| 7 | CROP PRODUCTION (CROP LAND OR DRY LAND) | 580.00 |
| 8 | MUNICIPAL (URBANIZED HIGH DENSITY AREA) | 319.00 |
| 9 | FLOW ALTERATIONS FROM WATER DIVERSIONS | 219.00 |
| 10 | CONSTRUCTION | 172.00 |
Iowa Assessed Waters
Individual Use Support for Wetlands
Description of this table
| State Designated Use | Total Acres Assessed | Percent Good | Percent Threatened | Percent Impaired | % Good |
|---|---|---|---|---|---|
| % Threatened |
|||||
| % Impaired |
|||||
| AQUATIC LIFE SUPPORT | 36,323.00 | 5.86 | 47.18 | 46.95 | |
| FISH CONSUMPTION | 108.00 | 100.00 | .00 | .00 | |
| OVERALL USE SUPPORT | 36,323.00 | 5.86 | 47.18 | 46.95 | |
Iowa Assessed Waters
Water Quality Attainment for Wetlands
Description of this table
| Attainment Status | Acres | Percent of Assessed |
| Good | 2,130.00 | 5.86 |
| Threatened | 17,139.00 | 47.18 |
| Impaired | 17,054.00 | 46.95 |
| Total Acres Assessed | 36,323.00 | 100.00 |
Iowa Top Causes of Impairments
for Wetlands
Description of this table
| # | State Cause Name | Total Acres Impaired |
|---|---|---|
| 1 | SEDIMENTATION/SILTATION | 22,716.00 |
| 2 | NUTRIENTS | 9,722.00 |
| 3 | FLOW ALTERATION | 9,480.00 |
| 4 | NONNATIVE FISH, SHELLFISH, OR ZOOPLANKTON | 4,492.00 |
| 5 | SUSPENDED ALGAE | 1,067.00 |
| 6 | TURBIDITY | 965.00 |
| 7 | NON-NATIVE AQUATIC PLANTS | 940.00 |
| 8 | TOTAL SUSPENDED SOLIDS (TSS) | 225.00 |
| 9 | OTHER HABITAT ALTERATIONS | 200.00 |
| 10 | ORGANIC ENRICHMENT/LOW DO | 140.00 |
Iowa Top Probable Sources of Impairments
for Wetlands
Description of this table
| # | State Source Name | Total Acres Impaired by Source |
|---|---|---|
| 1 | NATURAL SOURCES | 29,018.00 |
| 2 | AGRICULTURE | 22,856.00 |
| 3 | STREAMBANK MODIFICATIONS/DESTABLIZATION | 13,159.00 |
| 4 | HYDROMODIFICATION | 6,497.00 |
| 5 | NON-IRRIGATED CROP PRODUCTION | 6,432.00 |
| 6 | FLOW ALTERATIONS FROM WATER DIVERSIONS | 4,081.00 |
| 7 | SOURCE UNKNOWN | 3,892.00 |
| 8 | ANIMAL FEEDING OPERATIONS (NPS) | 1,423.00 |
| 9 | CROP PRODUCTION (CROP LAND OR DRY LAND) | 1,323.00 |
| 10 | INTERNAL NUTRIENT RECYCLING | 1,067.00 |
Iowa
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 (Square Miles) | Inland Lake Shoreline (Miles) | |
| AMMONIA (TOTAL) | 21.98 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| AMMONIA (UN-IONIZED) | 707.33 | .00 | .00 | .00 | .00 | 140.00 | .00 | .00 | .00 |
| ARSENIC | 43.38 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ATRAZINE | 13.99 | 12,923.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CHLORINE | 27.01 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| COPPER | 82.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FLOW ALTERATION | 489.12 | .00 | .00 | .00 | .00 | 9,480.00 | .00 | .00 | .00 |
| IMPAIRMENT UNKNOWN | 464.51 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LEAD | 39.52 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| METALS | 94.37 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NITRATES | 93.73 | 90.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NON-NATIVE AQUATIC PLANTS | 4.30 | 42,702.00 | .00 | .00 | .00 | 940.00 | .00 | .00 | .00 |
| NONNATIVE FISH, SHELLFISH, OR ZOOPLANKTON | 111.92 | 2,097.00 | .00 | .00 | .00 | 4,492.00 | .00 | .00 | .00 |
| NONPRIORITY ORGANICS | 1.08 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NUTRIENTS | 640.53 | 28,631.00 | .00 | .00 | .00 | 9,722.00 | .00 | .00 | .00 |
| OIL AND GREASE | 9.28 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ORGANIC ENRICHMENT/LOW DO | 1,016.13 | 25,472.00 | .00 | .00 | .00 | 140.00 | .00 | .00 | .00 |
| OTHER HABITAT ALTERATIONS | 2,672.33 | 219.00 | .00 | .00 | .00 | 200.00 | .00 | .00 | .00 |
| PATHOGENS | 681.87 | 10,259.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PESTICIDES | 184.23 | 507.00 | .00 | .00 | .00 | 15.00 | .00 | .00 | .00 |
| PH | 54.82 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| POLYCHLORINATED BIPHENYLS | .00 | 315.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PRIORITY ORGANICS | 27.23 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SALINITY | 16.17 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SEDIMENTATION/SILTATION | 1,439.85 | 7,677.00 | .00 | .00 | .00 | 22,716.00 | .00 | .00 | .00 |
| SUSPENDED ALGAE | 46.10 | 25,966.00 | .00 | .00 | .00 | 1,067.00 | .00 | .00 | .00 |
| TEMPERATURE, WATER | 4.12 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TOTAL SUSPENDED SOLIDS (TSS) | 25.98 | 10,716.00 | .00 | .00 | .00 | 225.00 | .00 | .00 | .00 |
| TURBIDITY | 82.86 | 50,889.00 | .00 | .00 | .00 | 965.00 | .00 | .00 | .00 |
| UNKNOWN TOXICITY | 113.94 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
Iowa
Probable Sources Contributing to Impairment
Description of this table| State Source Name | Size of Assessed Waters with Probable Sources 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 (Square Miles) | Inland Lake Shoreline (Miles) | |
| AGRICULTURE | 1,770.35 | 30,896.00 | .00 | .00 | .00 | 22,856.00 | .00 | .00 | .00 |
| ANIMAL FEEDING OPERATIONS (NPS) | .00 | .00 | .00 | .00 | .00 | 1,423.00 | .00 | .00 | .00 |
| CHANNELIZATION | 1,622.95 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CONSTRUCTION | .00 | 172.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CONTAMINATED SEDIMENTS | 41.39 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CROP PRODUCTION (CROP LAND OR DRY LAND) | 247.92 | 580.00 | .00 | .00 | .00 | 1,323.00 | .00 | .00 | .00 |
| DAM CONSTRUCTION (OTHER THAN UPSTREAM FLOOD CONTROL PROJECTS) | 14.53 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FLOW ALTERATIONS FROM WATER DIVERSIONS | 336.64 | 219.00 | .00 | .00 | .00 | 4,081.00 | .00 | .00 | .00 |
| HABITAT MODIFICATION (OTHER THAN HYDROMODIFICATION) | 1,075.24 | .00 | .00 | .00 | .00 | 853.00 | .00 | .00 | .00 |
| HYDROMODIFICATION | 1,518.25 | .00 | .00 | .00 | .00 | 6,497.00 | .00 | .00 | .00 |
| ILLICIT CONNECTIONS/HOOK-UPS TO STORM SEWERS | 1.20 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| INDUSTRIAL POINT SOURCE DISCHARGE | 39.61 | .00 | .00 | .00 | .00 | 140.00 | .00 | .00 | .00 |
| INTENSIVE ANIMAL FEEDING OPERATIONS | 316.48 | .00 | .00 | .00 | .00 | 917.00 | .00 | .00 | .00 |
| INTERNAL NUTRIENT RECYCLING | .00 | 64,137.00 | .00 | .00 | .00 | 1,067.00 | .00 | .00 | .00 |
| LAND DISPOSAL | 3.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LIVESTOCK (GRAZING OR FEEDING OPERATIONS) | 491.77 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOSS OF RIPARIAN HABITAT | 512.89 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MUNICIPAL (URBANIZED HIGH DENSITY AREA) | 27.31 | 319.00 | .00 | .00 | .00 | 247.00 | .00 | .00 | .00 |
| MUNICIPAL POINT SOURCE DISCHARGES | 216.78 | 148.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NATURAL SOURCES | 671.28 | 29,676.00 | .00 | .00 | .00 | 29,018.00 | .00 | .00 | .00 |
| NON-IRRIGATED CROP PRODUCTION | .00 | .00 | .00 | .00 | .00 | 6,432.00 | .00 | .00 | .00 |
| ON-SITE TREATMENT SYSTEMS (SEPTIC SYSTEMS AND SIMILAR DECENCENTRALIZED SYSTEMS) | 8.20 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| OTHER | 53.96 | 812.00 | .00 | .00 | .00 | 15.00 | .00 | .00 | .00 |
| PASTURE GRAZING - RIPARIAN | 604.43 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PASTURE GRAZING - RIPARIAN AND/OR UPLAND | 68.28 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| RANGELAND GRAZING | 25.85 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| RCRA HAZARDOUS WASTE SITES | 3.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| RESOURCE EXTRACTION | 45.89 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SEDIMENT RESUSPENSION | .00 | 51,077.00 | .00 | .00 | .00 | 965.00 | .00 | .00 | .00 |
| SOURCE UNKNOWN | 2,069.65 | 23,134.00 | .00 | .00 | .00 | 3,892.00 | .00 | .00 | .00 |
| SPILLS FROM TRUCKS OR TRAINS | 177.33 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| STREAMBANK MODIFICATIONS/DESTABLIZATION | 1,182.43 | .00 | .00 | .00 | .00 | 13,159.00 | .00 | .00 | .00 |
| SURFACE MINING | 21.69 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPSTREAM IMPOUNDMENTS (E.G., PL-566 NRCS STRUCTURES) | 6.19 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
