Regional Board 5 - Central Valley Region | CATEGORY 4A | Final 2008 California 305(b)/303(d) Integrated Report
September 2009
2008 CALIFORNIA LIST OF WATER QUALITY LIMITED SEGMENTS
BEING ADDRESSED BY USEPA APPROVED TMDLS

REGION | WATER BODY NAME | WATER TYPE | WATERSHED* CALWATER / USGS HUC | POLLUTANT POTENTIAL SOURCES Relevant Notes | ESTIMATED AREA ASSESSED | FIRST YEAR LISTED | ADDRESSED BY** | USEPA TMDL APPROVAL DATE
5 | Bear Creek (Colusa County) | River & Stream | 51320023 / 18020116 | Mercury Resource Extraction | 15 Miles | 2002 | B | 2007
5 | Cache Creek, North Fork (below Indian Valley Reservoir, Lake County) | River & Stream | 51340040 / 18020116 | Mercury Resource Extraction | 14 Miles | 2008 | B | 2007
5 | Clear Lake | Lake & Reservoir | 51352000 / 18020116 | Mercury Resource Extraction | 40070 Acres | 1988 | B | 2003
| Nutrients Agriculture Erosion/Siltation Grazing-Related Sources Urban Runoff/Storm Sewers | 40070 Acres | 1986 | B | 2007
5 | Elk Grove Creek | River & Stream | 51911000 / 18020109 | Chlorpyrifos Source Unknown | 6.9 Miles | 1998 | B | 2004
| Diazinon Agriculture Urban Runoff/Storm Sewers | 6.9 Miles | 1998 | B | 2004
5 | Harley Gulch | River & Stream | 51332022 / 18020116 | Mercury Resource Extraction | 6 Miles | 1992 | B | 2007
| All resource extraction sources are abandoned mines.
5 | Walker Slough (partly in Delta Waterways, eastern portion) | River & Stream | 53140000 / 18040002 | Pathogens Recreational and Tourism Activities (non-boating) Urban Runoff/Storm Sewers | 2.3 Miles | 2002 | B | 2008