San Lorenzo River Nitrate TMDL

Information

Problem Statement - Nitrate concentrations have increased in the San Lorenzo River watershed since the 1950s. In addition, nitrate concentrations are threatening violations of the Water Quality Control Plan, Central Coast Region (Basin Plan) as one constituent or factor that may contribute to taste and odor problems in drinking water.

Documentation

  • August 22, 2003 - USEPA approves the removal of the nitrate objective for the San Lorenzo River
  • January 14, 2003 - USEPA approves the San Lorenzo River Nitrate TMDL
    • USEPA approval letter
  • February 13, 2002 - OAL approves the removal of the nitrate objective for the San Lorenzo River
    • OAL approval letter
  • November 15, 2001 - State Water Resources Control Board approves the removal of the nitrate objective for the San Lorenzo River
  • September 15, 2000 - Central Coast Water Board approves the San Lorenzo River Nitrate TMDL
  • June 2, 2000 - Central Coast Water Board approves removal of the nitrate objective for the San Lorenzo River

Contacts

Status and Public Notices

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

Approval status

  • Central Coast Water Board
    - approved September 15, 2000.
  • State Water Resources Control Board
    - did not approve the TMDL since the TMDL relied on exisiting implementation measures.
  • US Environmental Protection Agency
    - approved January 14, 2003, which is the effective date.