Jump to main content.


Return to home page

On This Page

California State Report

For More Information:

Download Excel compatible information

Download GIS Information (Internet Explorer only)

Water Quality Data Available for this Watershed

California, Lower American Watershed


Click on the watershed for an interactive map

Search for a waterbody within Lower American
Enter Waterbody Name:


Listed Waters for Reporting Year 2006
California, Lower American Watershed

Description of this table
NOTE: Click on the underlined "Waterbody Name" to view a Waterbody report.
American River, Lower (Nimbus Dam To Confluence With Sacramento River) CAR5192100019980813142021 River 26.9286 miles TMDL needed
American River, Lower (Nimbus Dam To Confluence With Sacramento River) CAR5192100019980813142021 Rivers and Streams 27 miles TMDL needed
Arcade Creek CAR5192100019980813113546 Rivers and Streams 9.9 miles TMDL needed
Arcade Creek CAR5192100019980813113546 River 9.9 miles TMDL needed
Delta Waterways (Eastern Portion) CAE5100000020021115112329 Estuary 20135 square miles TMDL needed
Natoma, Lake CAL5192100020020430135321 Freshwater Reservoir .757803 acres TMDL needed
Natoma, Lake CAL5192100020020430135321 Lakes, Reservoirs, and Ponds 484.992 acres TMDL needed
Natomas East Main Drainage Canal (Aka Steelhead Creek, Downstream Of Confluence With Arcade Creek) CAR5192100020021209150207 Rivers and Streams 3.5 miles TMDL needed
Natomas East Main Drainage Canal (Aka Steelhead Creek, Downstream Of Confluence With Arcade Creek) CAR5192100020021209150207 River 3.54304 miles TMDL needed
Natomas East Main Drainage Canal (Aka Steelhead Creek, Upstream Of Confluence With Arcade Creek) CAR5192100019980817101740 Rivers and Streams 12 miles TMDL needed
Natomas East Main Drainage Canal (Aka Steelhead Creek, Upstream Of Confluence With Arcade Creek) CAR5192100019980817101740 River 12.2142 miles TMDL needed

Top of page



Causes of Impairment for Reporting Year 2006

California, Lower American

Description of this table
Mercury 3
Diazinon 2
Polychlorinated Biphenyls (PCBs) 2
Unknown Toxicity 2
Chlorpyrifos 1
Copper 1
DDT 1
Exotic Species 1
Group A Pesticides 1

Top of page




Cumulative TMDLs by Pollutant

California, Lower American Watershed

This chart includes TMDLs since October 1, 1995.

Description of this table
NOTE: Click on the underlined "Number of TMDLs Completed" value to see a listing of those approved TMDLs for the pollutant.
Number of Causes of
Impairment Addressed
Chlorpyrifos color.gif 4 4
Diazinon color.gif 4 4
Methyl Mercury color.gif 1 1

Total: 9 TMDLs; 0 Causes of Impairment



Top of page


Jump to main content.