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Los Osos Creek, Warden Creek and Warden Lake Wetland Nutrient TMDL

Information

Problem Statement - Los Osos Creek was identified in 1998 as impaired for nutrients and is included on the 2002 303(d) list. Warden Creek exhibits the most consistent violations of the numeric objective for nitrate protective of the MUN beneficial use. In 2002 dissolved oxygen 303(d) listings were added for Los Osos Creek and Warden Creek. Review of available water quality monitoring data (1993-2004) indicate that dissolved oxygen is periodically exceeding the numeric water quality standards at two of the four stations in Los Osos Creek and Warden Creek.
Map of the project area

Status and Public Notices

Status: fully approved and effective.
Public Notice: none at this time.

Approval status

Central Coast Water Board - approved December 3, 2004.
US Environmental Protection Agency - approved March 1, 2005, which is the effective date.

Documentation

  • March 1, 2005 - USEPA approves the Los Osos Creek, Warden Creek and Warden Lake Wetland Nutrient TMDL
  • December 3, 2004 - Central Coast Water Board approves the Los Osos Creek, Warden Creek and Warden Lake Wetland Nutrient TMDL

For Additional Information

Please contact Chris Rose at 805-542-4770 or by email at cjrose@waterboards.ca.gov