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Assessment Data for the State of Montana Year 2004
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State of Montana websites: | No State 305(b) Water Quality Assessment Report is available. |
| State Water Quality Program |
Search for a Waterbody within Montana
Total Assessed Waters for the State of Montana
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 | 13,195.39 | 553,071.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| Estimated Total Water Size in MT | 176,750.00 | 844,802.00 | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable |
| Percent of Waters Assessed | 7.47 | 65.47 | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable |
Assessed Waters of Montana 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) | |
| BATTLE | 70.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BEAVER | 120.00 | 80.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BEAVER | 135.30 | 3,500.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BEAVERHEAD | 175.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BELT | 136.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BIG DRY | 96.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BIG HOLE | 647.00 | 98.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BIG HORN LAKE | 14.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BIG MUDDY | 194.80 | 1,280.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BIG SANDY | 37.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BITTERROOT | 538.20 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BLACKFOOT | 498.20 | 2,336.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BOULDER | 194.40 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BOX ELDER | 9.20 | 3,040.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BOXELDER | 55.20 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BULLWHACKER-DOG | 204.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CHARLIE-LITTLE MUDDY | 94.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CLARKS FORK YELLOWSTONE | 172.30 | 10.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FISHER | 69.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FLATHEAD LAKE | 27.60 | 127,526.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FLATWILLOW | 164.50 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FLINT-ROCK | 132.50 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FORT PECK RESERVOIR | 234.60 | 245,000.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| GALLATIN | 283.60 | 250.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| JEFFERSON | 265.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| JUDITH | 246.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LITTLE DRY | 96.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER BIGHORN | 45.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER CLARK FORK | 300.50 | 8,800.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER FLATHEAD | 4.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER KOOTENAI | 6.20 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER MILK | 254.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER MUSSELSHELL | 196.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER TONGUE | 168.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER YELLOWSTONE | 230.40 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOWER YELLOWSTONE-SUNDAY | 146.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MADISON | 361.00 | 3,780.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MARIAS | 279.39 | 17,500.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MIDDLE CLARK FORK | 377.40 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MIDDLE FORK FLATHEAD | 119.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MIDDLE MILK | 270.40 | 3,901.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MIDDLE MUSSELSHELL | 114.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MIZPAH | 149.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NORTH FORK FLATHEAD | 135.50 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| O'FALLON | 248.50 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PEOPLES | 5.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PORCUPINE | 45.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PRARIE ELK-WOLF | 144.40 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| RED ROCK | 169.60 | 3,332.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| REDWATER | 194.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ROSEBUD | 109.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| RUBY | 303.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SAGE | 128.50 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SHIELDS | 142.20 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SMITH | 225.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SOUTH FORK FLATHEAD | 88.70 | 21,999.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ST. MARY | 10.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| STILLWATER | 146.00 | 3,349.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| STILLWATER | 90.40 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SUN | 148.40 | 3,500.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SWAN | 50.50 | 2,680.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TETON | 281.10 | 4,820.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TWO MEDICINE | 44.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER CLARK FORK | 677.10 | 3,675.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER KOOTENAI | 240.70 | 28,850.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER LITTLE MISSOURI | 99.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER MILK | 21.30 | 4,000.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER MISSOURI | 380.60 | 46,080.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER MISSOURI-DEARBORN | 319.70 | 5,600.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER MUSSELSHELL | 200.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER TONGUE | 57.70 | 3,500.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER YELLOWSTONE | 334.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER YELLOWSTONE-LAKE BASIN | 105.40 | 3,897.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPPER YELLOWSTONE-POMPEYS PILLAR | 10.00 | 675.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| WILLOW | 117.60 | 9.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| YAAK | 71.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| YELLOWSTONE HEADWATERS | 36.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
Montana 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 |
|||||
| AGRICULTURAL | 9,538.39 | 90.83 | .00 | 9.17 | |
| AQUATIC LIFE | 10,794.19 | 22.32 | .00 | 77.68 | |
| COLD WATER FISHERY | 7,472.00 | 16.03 | .11 | 83.87 | |
| DRINKING WATER | 7,189.20 | 60.87 | .00 | 39.13 | |
| INDUSTRIAL | 9,527.19 | 90.11 | .00 | 9.89 | |
| PRIMARY CONTACT RECREATION | 8,842.39 | 56.90 | 1.54 | 41.56 | |
| WARM WATER FISHERY | 3,790.09 | 31.13 | .00 | 68.87 | |
Montana Assessed Waters
Water Quality Attainment for Rivers and Streams
Description of this table
| Attainment Status | Miles | Percent of Assessed |
| Good | 3,370.40 | 25.54 |
| Threatened | 8.10 | .06 |
| Impaired | 9,816.89 | 74.40 |
| Total Miles Assessed | 13,195.39 | 100.00 |
Montana Top Causes of Impairments
for Rivers and Streams
Description of this table
| # | State Cause Name | Total Miles Impaired |
|---|---|---|
| 1 | OTHER HABITAT ALTERATIONS | 6,608.10 |
| 2 | FLOW ALTERATION | 4,248.99 |
| 3 | SEDIMENTATION/SILTATION | 3,742.90 |
| 4 | METALS | 3,420.90 |
| 5 | RIPARIAN DEGRADATION | 3,388.70 |
| 6 | NUTRIENTS | 2,910.50 |
| 7 | DEWATERING | 1,953.70 |
| 8 | BANK EROSION | 1,823.10 |
| 9 | FISH HABITAT DEGRADATION | 1,532.50 |
| 10 | THERMAL MODIFICATIONS | 1,457.90 |
Montana Top Probable Sources of Impairments
for Rivers and Streams
Description of this table
| # | State Source Name | Total Miles Impaired by Source |
|---|---|---|
| 1 | AGRICULTURE | 6,982.20 |
| 2 | LIVESTOCK (GRAZING OR FEEDING OPERATIONS) | 5,220.50 |
| 3 | HYDROMODIFICATION | 4,211.19 |
| 4 | CROP PRODUCTION (CROP LAND OR DRY LAND) | 3,368.80 |
| 5 | HABITAT MODIFICATION - OTHER THAN HYDROMODIFICATION | 2,578.70 |
| 6 | RESOURCE EXTRACTION | 2,520.30 |
| 7 | FLOW ALTERATIONS FROM WATER DIVERSIONS | 2,275.99 |
| 8 | IMPACTS FROM ABANDONED MINE LANDS (INACTIVE) | 1,824.60 |
| 9 | CHANNELIZATION | 1,365.90 |
| 10 | STREAMBANK MODIFICATIONS/DESTABLIZATION | 1,296.20 |
Montana 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 |
|||||
| AGRICULTURAL | 290,671.90 | 81.88 | .00 | 18.12 | |
| AQUATIC LIFE | 287,683.30 | 29.68 | 2.62 | 67.70 | |
| COLD WATER FISHERY | 254,177.60 | 79.84 | 2.97 | 17.18 | |
| DRINKING WATER | 478,427.10 | 36.66 | .00 | 63.34 | |
| INDUSTRIAL | 294,776.60 | 97.39 | .00 | 2.61 | |
| PRIMARY CONTACT RECREATION | 519,242.30 | 39.73 | .00 | 60.27 | |
| WARM WATER FISHERY | 34,389.40 | 49.46 | .00 | 50.54 | |
Montana Assessed Waters
Water Quality Attainment for Lakes, Ponds and Reservoirs
Description of this table
| Attainment Status | Acres | Percent of Assessed |
| Good | 63,489.40 | 11.48 |
| Threatened | 4,200.00 | .76 |
| Impaired | 485,382.40 | 87.76 |
| Total Acres Assessed | 553,071.80 | 100.00 |
Montana Top Causes of Impairments
for Lakes, Ponds and Reservoirs
Description of this table
| # | State Cause Name | Total Acres Impaired |
|---|---|---|
| 1 | METALS | 437,821.60 |
| 2 | MERCURY | 418,836.80 |
| 3 | NON-NATIVE AQUATIC PLANTS | 289,280.00 |
| 4 | LEAD | 246,600.00 |
| 5 | NUTRIENTS | 178,049.40 |
| 6 | SEDIMENTATION/SILTATION | 135,368.90 |
| 7 | EXCESS ALGAL GROWTH | 131,026.90 |
| 8 | ORGANIC ENRICHMENT/LOW DO | 129,806.90 |
| 9 | POLYCHLORINATED BIPHENYLS | 129,356.80 |
| 10 | FLOW ALTERATION | 43,873.60 |
Montana Top Probable Sources of Impairments
for Lakes, Ponds and Reservoirs
Description of this table
| # | State Source Name | Total Acres Impaired by Source |
|---|---|---|
| 1 | ATMOSPHERIC DEPOSITON - TOXICS | 376,506.90 |
| 2 | AGRICULTURE | 315,385.80 |
| 3 | RESOURCE EXTRACTION | 291,089.80 |
| 4 | IMPACTS FROM ABANDONED MINE LANDS (INACTIVE) | 291,080.80 |
| 5 | HISTORIC BOTTOM DEPOSITS (NOT SEDIMENT) | 250,500.00 |
| 6 | HYDROMODIFICATION | 175,739.40 |
| 7 | MUNICIPAL POINT SOURCE DISCHARGES | 161,186.90 |
| 8 | FLOW ALTERATIONS FROM WATER DIVERSIONS | 143,389.40 |
| 9 | SOURCE UNKNOWN | 138,656.80 |
| 10 | SILVICULTURE | 137,356.80 |
Montana
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 (UN-IONIZED) | 127.10 | 35,180.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ARSENIC | 392.10 | 36,789.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BANK EROSION | 1,823.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CADMIUM | 478.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CHANNEL INCISEMENT | 338.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CHROMIUM (TOTAL) | .70 | 3,780.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| COPPER | 1,127.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CYANIDE | 10.50 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| DEWATERING | 1,953.70 | 3,780.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| EXCESS ALGAL GROWTH | 380.80 | 131,026.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FISH HABITAT DEGRADATION | 1,532.50 | 3,780.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FLOW ALTERATION | 4,248.99 | 43,873.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| IMPAIRMENT UNKNOWN | 4.20 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LEAD | 1,134.20 | 246,600.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MERCURY | 1,235.70 | 418,836.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| METALS | 3,420.90 | 437,821.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NITROGEN (TOTAL) | 243.90 | 5,600.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NITROGEN, NITRATE | 277.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NON-NATIVE AQUATIC PLANTS | 13.00 | 289,280.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NUTRIENTS | 2,910.50 | 178,049.40 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| OIL AND GREASE | 23.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ORGANIC ENRICHMENT/LOW DO | 198.60 | 129,806.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| OTHER | 105.80 | 3,860.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| OTHER HABITAT ALTERATIONS | 6,608.10 | 8,464.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PATHOGENS | 433.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PESTICIDES | .00 | 3,800.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PH | 105.50 | 20.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PHOSPHORUS (TOTAL) | 504.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| POLYCHLORINATED BIPHENYLS | 72.10 | 129,356.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PRIORITY ORGANICS | 45.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| RIPARIAN DEGRADATION | 3,388.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SALINITY/TDS/CHLORIDES | 96.00 | 3,500.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SALINITY/TDS/SULFATES | 577.60 | 4,872.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SEDIMENTATION/SILTATION | 3,742.90 | 135,368.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SELENIUM | 91.60 | 13,575.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SULFATES | 19.00 | 9,100.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| THERMAL MODIFICATIONS | 1,457.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TOTAL SUSPENDED SOLIDS (TSS) | 408.40 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TOTAL TOXICS | 8.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TURBIDITY | 108.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| URANIUM | 81.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| WATER LEVEL FLUCT | .00 | 36,083.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ZINC | 610.50 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
Montana
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) | |
| ACID MINE DRAINAGE | 710.30 | 40,560.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| AGRICULTURE | 6,982.20 | 315,385.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| AQUACULTURE | 1.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ATMOSPHERIC DEPOSITON - TOXICS | 58.00 | 376,506.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CHANGES IN ORDINARY STRATIFICATION AND BOTTOM WATER HYPOXIA/ANOXIA | .00 | 35,180.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CHANNELIZATION | 1,365.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CONSTRUCTION | 1,158.60 | 38,544.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CONTAMINATED SEDIMENTS | 234.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CROP PRODUCTION (CROP LAND OR DRY LAND) | 3,368.80 | 22,876.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| DAM CONSTRUCTION (OTHER THAN UPSTREAM FLOOD CONTROL PROJECTS) | 543.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| DREDGE MINING | 108.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| DREDGING (E.G., FOR NAVIGATION CHANNELS) | 21.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| EROSION FROM DERELICT LAND (BARREN LAND) | 10.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FLOW ALTERATIONS FROM WATER DIVERSIONS | 2,275.99 | 143,389.40 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| FOREST ROADS (ROAD CONSTRUCTION AND USE) | 459.40 | 6,029.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| GRAZING IN RIPARIAN OR SHORELINE ZONES | 33.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| GROUNDWATER LOADINGS | 37.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| HABITAT MODIFICATION - OTHER THAN HYDROMODIFICATION | 2,578.70 | 3,780.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| HIGHWAY/ROAD/BRIDGE RUNOFF (NON-CONSTRUCTION RELATED) | 502.20 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| HIGHWAYS, ROADS, BRIDGES, INFRASTURCTURE (NEW CONSTRUCTION) | 798.60 | 3,364.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| HISTORIC BOTTOM DEPOSITS (NOT SEDIMENT) | .80 | 250,500.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| HYDROMODIFICATION | 4,211.19 | 175,739.40 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| IMPACTS FROM ABANDONED MINE LANDS (INACTIVE) | 1,824.60 | 291,080.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| INDUSTRIAL POINT SOURCE DISCHARGE | 186.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| INTENSIVE ANIMAL FEEDING OPERATIONS | 231.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LAND APPLICATION OF WASTEWATER (NON-AGRICULTURAL) | 14.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LAND DISPOSAL | 123.40 | 35,180.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LIVESTOCK (GRAZING OR FEEDING OPERATIONS) | 5,220.50 | 4,852.10 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LOSS OF RIPARIAN HABITAT | 1,289.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MILL TAILINGS | 344.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MINE TAILINGS | 390.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MUNICIPAL (URBANIZED HIGH DENSITY AREA) | 160.90 | 126,006.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MUNICIPAL POINT SOURCE DISCHARGES | 442.40 | 161,186.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ON-SITE TREATMENT SYSTEMS (SEPTIC SYSTEMS AND SIMILAR DECENCENTRALIZED SYSTEMS) | 28.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| OTHER | 56.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PETROLEUM/NATURAL GAS PRODUCTION ACTIVITIES (PERMITTED) | .00 | 9.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PLACER MINING | 162.40 | 5,500.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| RECREATION AND TOURISM ACTIVITIES (OTHER THAN BOATING - SEE 7900) | 11.50 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| RESOURCE EXTRACTION | 2,520.30 | 291,089.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SEDIMENT RESUSPENSION | 47.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SILVICULTURE | 1,217.60 | 137,356.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SILVICULTURE HARVESTING | 61.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SILVICULTURE PLANTATION MANAGEMENT | .00 | 3,800.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SITE CLEARANCE (LAND DEVELOPMENT OR REDEVELOPMENT) | 447.80 | 35,180.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SOURCE UNKNOWN | 378.80 | 138,656.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SPILLS FROM TRUCKS OR TRAINS | 26.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| STREAMBANK MODIFICATIONS/DESTABLIZATION | 1,296.20 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SUBSURFACE MINING | 101.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SURFACE MINING | 8.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TOTAL RETENTION DOMESTIC SEWAGE LAGOONS | .00 | 3,500.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UNPAVED ROAD RUNOFF | 128.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UPSTREAM IMPOUNDMENTS (E.G., PL-566 NRCS STRUCTURES) | 233.10 | 126,006.90 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
