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Performance Report

San Diego Region - TMDLs for Impaired Lagoons, Adjacent Beaches, and Agua Hedionda Creek

Click here to go to Public Documents (including Lagoon Monitoring Order and Monitoring Reports)

Background

As shown on the following table, several lagoons and Agua Hedionda Creek are on the Section 303(d) List of Water Quality Limited Segments for water quality impairments due to nutrients/eutrophication, bacteria, sediment/siltation, total dissolved solids (TDS), or a combination of these pollutants. The Pacific Ocean shorelines (i.e., beach segments) adjacent to Loma Alta Slough, Buena Vista Lagoon, and San Elijo Lagoon, are also on the 303(d) List for bacteria impairments. The water quality limited segments and their impairing pollutants are shown in the table below.

Water Quality Limited Segments and Impairing Pollutants

Hydrologic Unit Water Quality Limited Segment Nutrients/ Eutrophication Sedimentation/ Siltation TDS Bacteria Staff Contact
Santa Margarita Hydrologic Unit (902.00) Santa Margarita Lagoon (902.11)
Yes
 
 
 
Barry Pulver
Carlsbad Hydrologic Unit (904.00) Loma Alta Slough (904.10)
Yes
 
 
Yes
Barry Pulver
Pacific Ocean Shoreline at Loma Alta Creek Mouth (904.10)
 
 
 
Yes
Cynthia Gorham
Buena Vista Lagoon (904.21)
Yes
Yes
 
Yes
Cynthia Gorham
Pacific Ocean Shoreline adjacent to Buena Vista Lagoon (904.20)
 
 
 
Yes
Cynthia Gorham
Lower Agua Hedionda Creek (904.31)
 
 
Yes 
 
Cynthia Gorham
San Elijo Lagoon (904.61)
Yes
Yes 
 
Yes 
Barry Pulver 
Pacific Ocean Shoreline at San Elijo Lagoon (904.60)
 
 
 
Yes
Cynthia Gorham
Penasquitos Hydrologic Unit (906.00) Los Penasquitos Lagoon (906.10)
 
 Yes
 
 
Cynthia Gorham
San Diego Hydrologic Unit (907.00) Famosa Slough & Channel (907.11)
 Yes
 
 
 
 Jody Ebsen

The San Diego Water Board is addressing the water quality impairments in these waterbodies and will develop/has adopted appropriate regulatory actions for each impairing pollutant in each listed waterbody. These actions may include the adoption of a total maximum daily load (TMDL), a TMDL Alternative, or re-classification of the 303(d) listing. The San Diego Water Board has adopted a TMDL for the Los Penasquitos Lagoon Sediment, and a TMDL Alternative for the Loma Alta Slough Eutrophication impairments. Links are provided below for additional information on these two actions.

The San Diego Water Board's Investigation Order No. R9-2006-0076 requires dischargers of pollutants to these waterbodies or their tributaries to submit monitoring reports to assess the water quality impairments in the waterbodies. The results are used to develop the appropriate regulatory approach to address the impairment and restore the beneficial uses of these waterbodies.

TMDL and TMDL Alternative Adopted by the Regional Board

TMDLs/TMDL Alternatives for two waterbodies listed above have been adopted by the Regional Board. Links to additional information on these are provided below:

TMDLs in Progress

  • Santa Margarita Lagoon Eutrophic Conditions (webpage under construction)
  • Famosa Slough & Channel Eutrophic Conditions (webpage under construction)

Mailing Lists for TMDLs for Impaired lagoons and Agua Hedionda Creek

To subscribe to an email list for TMDLs for Impaired lagoons and Agua Hedionda Creek in the San Diego Region, please send request to Cynthia Gorham at Cynthia.Gorham@waterboards.ca.gov. You may also obtain information at your convenience from our Website or by appointment at the San Diego Water Board office.

Public Documents

Lagoon Monitoring Orders, Addedum, Technical Report, and Monitoring Workplan

Lagoon Monitoring Reports

Staff Contacts

Cynthia Gorham at (619) 521-3921 or by email at Cynthia.Gorham@waterboards.ca.gov

Jody Ebsen at (619) 521-3965 or by e-mail at Jody.Ebsen@waterboards.ca.gov

Barry Pulver at (619) 521-3381 or by e-mail at Barry.Pulver@waterboards.ca.gov