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1998 Section 303(d) List Fact Sheet for COLORADO

List Status
APPROVED by EPA on JUL-15-1998.

Click here to see metadata for this report.

Waters Listed by Waterbody Type

NOTE: Click on the underlined "Number of Waters on List" value to see a listing of those waters.
Waterbody Type Number of Waters on List
STREAM/CREEK/RIVER color.gif 70
LAKE/RESERVOIR/POND color.gif 9
Total Number of Impaired Waters Reported: 79

Waters Listed by Watershed
NOTE: Click on the underlined "Watershed Name" to view a Watershed report. Click on the underlined "Number of Waters on List" value to see a listing of those waters.
Watershed Name Number of Waters on List Percent of Reported
Alamosa-Trinchera color.gif 7 8.86
Animas color.gif 7 8.86
Arkansas Headwaters color.gif 6 7.59
Upper South Platte color.gif 5 6.33
Middle South Platte-Cherry Creek color.gif 5 6.33
Clear color.gif 5 6.33
Blue color.gif 5 6.33
St. Vrain color.gif 4 5.06
Upper Dolores color.gif 4 5.06
Upper Arkansas color.gif 4 5.06
South Platte Headwaters color.gif 3 3.80
Lower Gunnison color.gif 3 3.80
San Miguel color.gif 3 3.80
Eagle color.gif 3 3.80
Colorado Headwaters color.gif 3 3.80
Big Thompson color.gif 2 2.53
Uncompahange color.gif 2 2.53
San Luis color.gif 2 2.53
Cache La Poudre color.gif 1 1.27
Upper Arkansas-John Martin Reservoir color.gif 1 1.27
Saguache color.gif 1 1.27
East-Taylor color.gif 1 1.27
Mancos color.gif 1 1.27
Not Reported color.gif 1 1.27
Mcelmo color.gif 1 1.27
Upper San Juan color.gif 1 1.27
North Fork Gunnison color.gif 1 1.27
Roaring Fork color.gif 1 1.27
Rio Grande Headwaters color.gif 1 1.27
Upper Arkansas-Lake Meredith color.gif 1 1.27
North Fork Republican color.gif 1 1.27
Total Number of Impaired Waters Reported: 79
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Impairments
NOTE: Click on the underlined "Impairments Reported" value to see a listing of those waters with the impairment. Click on the underlined "General Impairment Name" to see the detailed state reported impairment names.
General Impairment Name Impairments Reported Percent of Reported
METALS color.gif 153 77.66
PH color.gif 10 5.08
SEDIMENT/SILTATION color.gif 8 4.06
PESTICIDES color.gif 6 3.05
PATHOGENS color.gif 5 2.54
UNIONIZED AMMONIA color.gif 5 2.54
OTHER CAUSE color.gif 5 2.54
NUTRIENTS color.gif 2 1.02
SULFATES color.gif 1 .51
ORGANIC ENRICHMENT/LOW DO color.gif 1 .51
CYANIDE color.gif 1 .51
Total Number of Impairments Reported: 197

Impairment Priorities
NOTE: Click on the underlined "Impairments Reported" value to see a listing of those waters with that impairment priority.
Priority Impairments Reported Percent of Reported
HIGH color.gif 77 39.09
LOW color.gif 62 31.47
MEDIUM color.gif 58 29.44
Total Number of Impairments Reported: 197

Approved TMDLs by Pollutant since January 1, 1996
NOTE: Click on the underlined "Pollutant" value to see associated listed waters for which a TMDL was developed. Click on the underlined "Number of TMDLs Approved" value to see a listing of those approved TMDLs for the pollutant. EPA is in the process of collecting TMDL information from the states. Because these efforts are on-going, there may be additional approved TMDLs that were not included in the listings below.
Pollutant Number of TMDLs Approved Percent of Reported
CHLORINE color.gif 71 12.68
FECAL COLIFORM color.gif 66 11.79
UNIONIZED AMMONIA color.gif 48 8.57
COPPER color.gif 30 5.36
AMMONIA color.gif 30 5.36
CHLORINE RESIDUAL color.gif 29 5.18
ZINC color.gif 27 4.82
MERCURY color.gif 25 4.46
SILVER color.gif 25 4.46
CADMIUM color.gif 23 4.11
LEAD color.gif 23 4.11
FECAL color.gif 23 4.11
IRON color.gif 22 3.93
MANGANESE color.gif 19 3.39
AMMONIA (UN-IONIZED) color.gif 12 2.14
CYANIDE color.gif 9 1.61
SELENIUM color.gif 8 1.43
PHOSPHORUS color.gif 8 1.43
CHROMIUM color.gif 6 1.07
ARSENIC color.gif 5 .89
SEDIMENT color.gif 5 .89
TOTAL RESIDUAL CHLORINE color.gif 5 .89
ALUMINUM color.gif 4 .71
BENZENE color.gif 4 .71
PH color.gif 3 .54
CHROMIUM VI color.gif 3 .54
CHLORIDE color.gif 3 .54
BORON color.gif 2 .36
E. COLI color.gif 2 .36
NICKEL color.gif 2 .36
SULFIDE color.gif 2 .36
MTBE color.gif 2 .36
SULFATE color.gif 2 .36
NITROGEN color.gif 1 .18
1,2-DICHLOROETHANE color.gif 1 .18
TRICHLOROETHENE color.gif 1 .18
CHROMIUM III color.gif 1 .18
URANIUM color.gif 1 .18
TETRACHLOROETHENE color.gif 1 .18
CONTAMINATED SEDIMENTS (NICKEL) color.gif 1 .18
NAPHTHALENE color.gif 1 .18
DISSOLVED OXYGEN color.gif 1 .18
CONTAMINATED SEDIMENTS (COPPER) color.gif 1 .18
BERYLLIUM color.gif 1 .18
NITRATE color.gif 1 .18
Total Number of TMDLs Reported to EPA since January 1, 1996: 560

Approved TMDLS by EPA Fiscal Year (October 1 through September 30) since October 1, 1995
Fiscal Year Number of TMDLs Approved Percent Approved
1997 color.gif 102 18.21
1998 color.gif 23 4.11
1999 color.gif 47 8.39
2000 color.gif 74 13.21
2001 color.gif 73 13.04
2002 color.gif 194 34.64
2003 color.gif 47 8.39

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External Links
The following agencies may also have relevant environmental information:
U. S. Geological Survey Data Exiting EPA Website
Colorado's Natural Resources Exiting EPA Website

 

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