Difference between revisions of "TMDLs in the Monterey Bay Region of California"

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This page summarizes the development and implementation of [[Total Maximum Daily Load]] (TMDL) plans in the [[Monterey Bay Region]] of California. The page was created by the [[ENVS 560/L Watershed Systems]] class at [http://csumb.edu CSUMB].
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An [[Summaries of Environmental Topics on the Central Coast of California|environmental summary]] created by the [[ENVS 560/L Watershed Systems]] class at [[CSUMB]].
 +
 
 +
This page provides links to documents relating to [[303d]] listings and [[Total Maximum Daily Load]] (TMDL) plans in [[California's Central Coast Region]]. The page was created by the [[ENVS 560/L Watershed Systems]] class at [http://csumb.edu CSUMB].
  
 
==Background==
 
==Background==
 +
:''Main article: [[TMDL]]''
 +
 
Under 1987 provisions (section 304 (1)) to the [[Clean Water Act]] of 1972, states must identify and report all water bodies which do not meet [[water quality]] or [[beneficial use]] standards. Those impaired (polluted) water bodies not meeting water quality standards must be placed on the [[303d list]].  
 
Under 1987 provisions (section 304 (1)) to the [[Clean Water Act]] of 1972, states must identify and report all water bodies which do not meet [[water quality]] or [[beneficial use]] standards. Those impaired (polluted) water bodies not meeting water quality standards must be placed on the [[303d list]].  
  
 
States must submit updated lists every two years. Along with identification of impaired water bodies, states must also identify stressors causing the impairment (i.e. pollutants), which are also identified on the [[303d list]]. A remediation plan must then be developed and implemented for each impaired water body listed.  
 
States must submit updated lists every two years. Along with identification of impaired water bodies, states must also identify stressors causing the impairment (i.e. pollutants), which are also identified on the [[303d list]]. A remediation plan must then be developed and implemented for each impaired water body listed.  
  
These plans are known as total maximum daily loads (TMDLs). [[TMDL]]s are used to define and achieve a total maximum daily load for each pollutant causing impairment within a water body. The list also identifies where a TMDL has been approved by the Environmental Protection Agency (EPA) and implementation is available, but water quality standards have not yet been met, or an action other than a TMDL is being used to address the issue.
+
These plans are known as total maximum daily loads (TMDLs). [[TMDL]]s are used to define and achieve a total maximum daily load for each pollutant causing impairment within a water body. The list also identifies where a TMDL has been approved by the [[Environmental Protection Agency]] (EPA) and implementation is available, but water quality standards have not yet been met, or an action other than a TMDL is being used to address the issue.
 +
 
 +
===Summary of listing categories===
 +
The CCRWQCB has assigned grouped 303(d) listings into the following categories. Only categories 4A, 4B, and 5 are included in the 303(d) list.<ref>[[CCRWQCB|Central Coast Regional Water Quality Control Board]]. 2009. Clean water act sections 305(b) and 303(d) integrated report for the Central Coast region. Public review draft April.  http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/2008_0409_draft_integrated_report.pdf</ref>
 +
 
 +
* Category 1. All core uses are supported;
 +
* Category 2. At least one core use is supported;
 +
* Category 3. Insufficient information exists to make a determination;
 +
* Category 4A. At least one core use is not supported, however "a TMDL has been developed and approved by USEPA and is reasonably expected to result in the attainment of the water quality standard within a reasonable, specified time frame (p.10, CCRWQCB)."
 +
* Category 4B. At least one core use is not supported, however "an existing regulatory program is reasonably expected to result in the attainment of the water quality standard within a reasonable, specified timeframe (p.10, CCRWQCB)."
 +
* Category 5. At least one core use is not supported.  A TMDL needs to be developed.
  
 
==Central Coast 303d list documents==
 
==Central Coast 303d list documents==
The [[303d list]] for the Central Coast region of California (Region 3) is maintained by the [[Central Coast Regional Water Quality Control Board]]. The 2006 303(d) list for the Central Coast region is available as a .pdf or .xls file<ref>CCRWQCB. 2006. 2006 CWA Section 303(d) List of Water Quality Limited Segments Requiring TMDLs (Central Coast Region). http://www.waterboards.ca.gov/water_issues/programs/tmdl/docs/303dlists2006/epa/r3_06_303d_reqtmdls.pdf </ref><ref>CCRWQCB. 2006. List of Water Quality Limited Segments Requiring TMDLs (Central Coast Region) http://www.waterboards.ca.gov/water_issues/programs/tmdl/docs/303dlists2006/epa/state_06_303dlist.xls></ref>. The 2010 303(d) statewide list is available as an .xls file<ref>CCRWQCB. 2010. Combined California 2010 303(d) list with potential sources. http://maps.waterboards.ca.gov/webmap/303d/files/2010_USEPA_approv_303d_List_Final_122311wsrcs.xls</ref> but is not available as a Central Coast-specific document as of March 2014.
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The [[303d list]] for the Central Coast region of California (Region 3) is maintained by the [[Central Coast Regional Water Quality Control Board]]. The 2006 303(d) list for the Central Coast region is available as a .pdf or .xls file<ref>CCRWQCB. 2006. 2006 CWA Section 303(d) List of Water Quality Limited Segments Requiring TMDLs (Central Coast Region). http://www.waterboards.ca.gov/water_issues/programs/tmdl/docs/303dlists2006/epa/r3_06_303d_reqtmdls.pdf </ref><ref>CCRWQCB. 2006. List of Water Quality Limited Segments Requiring TMDLs (Central Coast Region) http://www.waterboards.ca.gov/water_issues/programs/tmdl/docs/303dlists2006/epa/state_06_303dlist.xls></ref>. The 2010 303(d) statewide list is available as an .xls file<ref>CCRWQCB. 2010. Combined California 2010 303(d) list with potential sources. http://maps.waterboards.ca.gov/webmap/303d/files/2010_USEPA_approv_303d_List_Final_122311wsrcs.xls</ref> but is not available as a Central Coast-specific document as of March 2014. The 2012 303(d) statewide list was approved by the EPA on July 30, 2015 and is available via an [http://www.waterboards.ca.gov/water_issues/programs/tmdl/integrated2012.shtml integrated report] on the [[State Water Resources Control Board]] website. Although there was some Central Coast data not included in the 2012 Integrated Report, and in those cases,  decisions were carried over from the 2010 list.
  
'''Central Coast reports and listings, 2006-2008'''
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 +
====Monterey Bay area reports and listings, 2015====
 +
*[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/ag_waivers/docs/no_co_characterization%20rpt_06012015_final.pdf Northern Counties Groundwater Characterization, Salinas Valley, Pajaro Valley and Gilroy‐Hollister Valley]
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 +
====Monterey Bay area reports and listings, 2010-2012====
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 +
* [http://www.waterboards.ca.gov/centralcoast/board_info/agendas/2011/march/Item_14/14_att7.pdf Water Quality Conditions in the Central Coast Region Related to Agricultural Discharges]
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Please see the following pages for information on 303(d) listed waterbodies and their impairments in the Monterey Bay region.
 +
*[[Monterey Bay Area TMDL Listings]] (table)
 +
*[[Monterey Bay Area TMDL Listings - Priorities, Progress, and Documents]] (list)
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*[[Approaches to TMDL Development and Implementation in the Monterey Bay Area]]
 +
 
 +
====Central Coast reports and listings, 2006-2008====
  
 
* From the [http://www.swrcb.ca.gov/rwqcb3 CCRWQCB web site], [http://www.swrcb.ca.gov/rwqcb3/water_issues/programs/tmdl/index.shtml TMDL program], [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d_list.shtml 303d-list page]:
 
* From the [http://www.swrcb.ca.gov/rwqcb3 CCRWQCB web site], [http://www.swrcb.ca.gov/rwqcb3/water_issues/programs/tmdl/index.shtml TMDL program], [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d_list.shtml 303d-list page]:
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** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_a.pdf Recommended changes since the 2006 list]
 
** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_a.pdf Recommended changes since the 2006 list]
 
** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_f.shtml 2008 New or Revised Fact Sheets for the Central Coast region]
 
** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_f.shtml 2008 New or Revised Fact Sheets for the Central Coast region]
** 2008 listings by category (see [[TMDLs in the Monterey Bay Region of California#Summary of listing categories]]):
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** 2008 listings by category (see [[#Summary of listing categories | Summary of listing categories]]):
 
*** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_b.shtml Category 2]
 
*** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_b.shtml Category 2]
 
*** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_c.shtml Category 3]
 
*** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_c.shtml Category 3]
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*** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_e.shtml Category 5]
 
*** [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/appendix_e.shtml Category 5]
  
'''Statewide listings including the Central Coast, 2010'''
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 +
====Statewide listings including the Central Coast, 2010====
  
 
*From the [http://www.waterboards.ca.gov/water_issues/programs/tmdl/integrated2010.shtml State Water Resources Control Board 2010 Integrated Report] website:
 
*From the [http://www.waterboards.ca.gov/water_issues/programs/tmdl/integrated2010.shtml State Water Resources Control Board 2010 Integrated Report] website:
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**[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/miscellaneous_changes_report.shtml#r3 Miscellaneous changes for the Central Coast region]
 
**[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/miscellaneous_changes_report.shtml#r3 Miscellaneous changes for the Central Coast region]
 
**[http://www.waterboards.ca.gov/water_issues/programs/tmdl/integrated2010.shtml Maps, data download, and other materials (2010)]
 
**[http://www.waterboards.ca.gov/water_issues/programs/tmdl/integrated2010.shtml Maps, data download, and other materials (2010)]
**2010 listings by category (see [[TMDLs in the Monterey Bay Region of California#Summary of listing categories]]):
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**2010 listings by category (see [[#Summary of listing categories | Summary of listing categories]]):
 
***[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/category2_report.shtml Category 2]
 
***[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/category2_report.shtml Category 2]
 
***[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/category3_report.shtml Category 3]
 
***[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/category3_report.shtml Category 3]
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***[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/category5_report.shtml Category 5]
 
***[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2010state_ir_reports/category5_report.shtml Category 5]
  
===Summary of listing categories===
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==Central Coast TMDL Projects==
The CCRWQCB has assigned grouped 303(d) listings into the following categories. Only categories 4A, 4B, and 5 are included in the 303(d) list.<ref>[[CCRWQCB|Central Coast Regional Water Quality Control Board]]. 2009. Clean water act sections 305(b) and 303(d) integrated report for the Central Coast region. Public review draft April.  http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/2008_0409_draft_integrated_report.pdf</ref>
+
 
+
* Category 1. All core uses are supported;
+
* Category 2. At least one core use is supported;
+
* Category 3. Insufficient information exists to make a determination;
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* Category 4A. At least one core use is not supported, however "a TMDL has been developed and approved by USEPA and is reasonably expected to result in the attainment of the water quality standard within a reasonable, specified time frame (p.10, CCRWQCB)."
+
* Category 4B. At least one core use is not supported, however "an existing regulatory program is reasonably expected to result in the attainment of the water quality standard within a reasonable, specified timeframe (p.10, CCRWQCB)."
+
* Category 5. At least one core use is not supported.  A TMDL needs to be developed.
+
 
+
== Monterey Bay area listings ==
+
 
+
The closest listings to Monterey Bay include: <ref> http://www.waterboards.ca.gov/water_issues/programs/tmdl/docs/303dlists2006/epa/state_06_303dlist.xls List of Water Quality Limited Segments Requiring TMDLs.</ref>
+
 
+
[[Image:TMDL.jpg]]
+
 
+
For more details, see:
+
*[[Monterey Bay Area TMDL Listings]] and
+
*[[Monterey Bay Area TMDL Listings - Priorities, Progress, and Documents]]
+
 
+
Approaches to nutrient TMDL development are in the following reports:
+
 
+
*The [http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2006/2006_0044_tmdl_project_report.pdf Chorro Creek Nutrient TMDL report] set a sodium concentration limit of 50 mg/L and total dissolved solids concentration of 500 mg/L in order to help achieve the water quality objective for nutrient concentrations.
+
 
+
*The [http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0131_paj_nitrate_tmdl_attach_b_final_project_report.pdf Pajaro River and Llagas Creek report] sets the maximum concentration for nitrate within the water body at 10mg/L in order to protect beneficial uses.  The report does not include seasonality because the TMDL is equal to the water quality objectives of the region.
+
 
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*The [http://ecoviz.csumb.edu/wiki/images/f/f4/2002_-_TMDL_for_Nutrients_San_Diego_Creek_and_Newport_Bay.pdf San Diego Creek and Newport Bay Report] set the nitrate TMDL according to different seasons.  It allows 224 lbs/day of total inorganic nitrogen in Reach 2 of San Diego Creek from October 1 to March 31, and 175 lbs/day from April 1 to September 30.
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==Placeholder area (move into appropriate section or article)==
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[[Numeric targets]] are concentrations of specified nutrients that would not impair designated beneficial uses of a given water body. Water quality objectives given in the Basin Plan
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<ref name="Water Quality objectives for the Basin Plan"> [http://www.waterboards.ca.gov/centralcoast/publications_forms/publications/basin_plan/].</ref>. Water quality objectives for the Basin Plan are attempts to quantify the allowable nutrient concentrations. Objectives listed in the Plan are used as a starting point during TMDL development and adoption.
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===Margin of safety (MOS)===
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The [[margin of safety]] in the Monterey Bay region compares to other regions as being (more/less/equally?)… in terms of assumptions made of the environmental system.
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Some examples of reports that used conservative estimates include:
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*[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0131_paj_nitrate_tmdl_attach_b_final_project_report.pdf Pajaro River and Llagas Creek TMDL report]
+
*[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2006/2006_0044_tmdl_project_report.pdf Chorro Creek TMDL Report]
+
*[http://www.epa.gov/region9/water/tmdl/SanDiegoNewportSedimentNutrientsTMDLs.pdf San Diego Creek TMDL report]
+
 
+
The [http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0106_slo_nut_tmdl_attach_b_proj_report.pdf San Louis Obispo Creek TMDL Report] used the quantitative approach and estimated the margin of safety to be about 20% of the total nitrate-N mass load based on a number of uncertainties and limitations in their data.
+
 
+
The [http://www.epa.gov/region9/water/tmdl/malibu/final_nutrients.pdf Malibu Report Malibu Creek watershed TMDL report] also estimated a 20% margin of safety and implicitly included conservative assumptions into the TMDL analysis. However, it is this TMDL report has not yet been approved on the state or federal level (UPDATE FOR 2012).
+
 
+
===Implementation===
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Several approaches to specifying a monitoring plan have been adopted in federally approved TMDLs in the Monterey Bay area
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+
'''Examples of approaches to implementation found in similar regional TMDL reports'''
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*[http://www.epa.gov/owow/tmdl/nutrient/pdf/nutrient.pdf Laguna de Santa Rosa Nutrient TMDL]: the Waste Reduction Strategy includes: a grant program aimed at reducing waste inputs from confined animal operations, a storm water runoff program, an NPDES permit program, and voluntary actions organized by the Laguna Watershed Coordinated Resource Management and Planning Task Force.
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*[http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0106_slo_nut_tmdl_attach_b_proj_report.pdf San Luis Obispo Creek Nutrient TMDL]: the NPDES permit for the City of San Luis Obispo will incorporate an effluent limit for their NPDES permit, regulations for storm water through a small MS4 permit, cropland nitrate sources will be regulated and monitored through the [[Conditional waiver of waste discharge requirements for irrigated lands | Ag Waiver]].
+
*[http://ecoviz.csumb.edu/wiki/images/4/46/2003_-_Santa_Clara_River_Nitrogen_TMDL.pdf Santa Clara River Nitrogen TMDL]: Ammonia, nitrite, and nitrate reductions will be regulated through denitrification upgrades to Publicly Owned Treatment Works (POTW) and enforcement of effluent limits, NPDES permits, and agricultural Best Management Practices.
+
  
===Examples of TMDLs===
+
====TMDL Projects Currently in Development (2015-2016)====
The Lower Salinas River Watershed Nutrient TMDL [http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/docs/salinas/nutrients/sal_nut_dataanalyrpt_061410.pdf Progress Report] has summarized procedures to develop numeric targets for [[nutrient loading]] reductions (see above) in impaired water bodies, but did not provided recommended LAs. TMDLs in other parts of California provide examples of different approaches used to set TMDL allocations:
+
*[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/carpinteria_marsh/index.shtml Carpinteria Salt Marsh] (nutrients)
* The [http://www.swrcb.ca.gov/centralcoast/board_decisions/adopted_orders/2005/2005_0131_paj_nitrate_tmdl_attach_b_final_project_report.pdf Nitrate TMDL in development for the Pajaro River and Llagas Creek] sets all nitrate allocations (including background levels) at the numeric target of 10mg/L.
+
*[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/elkhorn_slough/do/index.shtml Elkhorn Slough Bennett Slough] (Biostimulatory substances)
* The [http://www.swrcb.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/salinas/lower_fecal/sal_fc_tmdl_att2_projrpt.pdf Lower Salinas River Watershed Fecal Coliform TMDL Final Report] sets allocations that are either equal to the TMDL or zero.
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*[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/pajaro/nutrients/index.shtml Pajaro River] (nutrients)
* The [http://ecoviz.csumb.edu/wiki/images/f/f4/2002_-_TMDL_for_Nutrients_San_Diego_Creek_and_Newport_Bay.pdf TMDL for Nutrients in San Diego Creek and Newport Bay] used by the EPA as an example for a nutrient TMDL sets allocations based on mass, but sets two different allocations for each source based on high and low water flow conditions.
+
*[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/pinto_lake/index.shtml Pinto Lake catchment] (harmful algal blooms)
* The [http://ecoviz.csumb.edu/wiki/images/4/46/2003_-_Santa_Clara_River_Nitrogen_TMDL.pdf Santa Clara River Nitrogen TMDL] gives allocation to water reclamation plants, publicly owned treatment works, and non point sources based on daily mass. Individual allocations for non-point sources are not specified.
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*[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/salinas/sed_tox/index.shtml Salinas River] (sediment toxicity, pyrethroid pesticides)
 +
*[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/salinas/turbidity/index.shtml Salinas River] (turbidity)
 +
*[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/santa_maria/salts/index.shtml Santa Maria River] (salts)
 +
*[http://www.waterboards.ca.gov/rwqcb3/water_issues/programs/tmdl/docs/santa_ynez/nutrient/index.shtml Santa Ynez River] (nutrients)
  
 
==References==
 
==References==
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<references/>
 
<references/>
  
==Links==
+
==See also==
 
* [[Central Coast Region Agricultural Waiver]]
 
* [[Central Coast Region Agricultural Waiver]]
 +
* [[Central Coast Regional Water Quality Control Board (CCRWQCB)]]
 
* [[TMDL]]
 
* [[TMDL]]
 +
* [[Monterey Bay Area TMDL Listings - Priorities, Progress, and Documents]]
 +
* [[Monterey Bay Area TMDL Listings | Table of 303d Listed Waters in Monterey Bay Region]]
 +
* [[Approaches to TMDL Development and Implementation in the Monterey Bay Area]]
 
* [[TMDL for Fecal Coliform for the Lower Salinas River Watershed, Monterey County, California]]
 
* [[TMDL for Fecal Coliform for the Lower Salinas River Watershed, Monterey County, California]]
 
* [[TMDL for Nutrients in Lower Salinas River Watershed, Monterey County, California]]
 
* [[TMDL for Nutrients in Lower Salinas River Watershed, Monterey County, California]]
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* [[Monterey Bay Area TMDL Listings| Table of 303d Listed Waters in Monterey Bay Region]]
 
* [[Monterey Bay Area TMDL Listings| Table of 303d Listed Waters in Monterey Bay Region]]
 
* [[ENVS 560/L Watershed Systems]] class
 
* [[ENVS 560/L Watershed Systems]] class
 +
* [[Lower Salinas River Watershed Nutrient TMDL - Implementation and Monitoring Progress]]
 +
* [[Water Quality Control Plan for the Central Coast Region]]
  
 
==Disclaimer==
 
==Disclaimer==
 
This page may contain student work completed as part of assigned coursework. It may not be accurate. It does not necessary reflect the opinion or policy of [[CSUMB]], its staff, or students.
 
This page may contain student work completed as part of assigned coursework. It may not be accurate. It does not necessary reflect the opinion or policy of [[CSUMB]], its staff, or students.

Latest revision as of 11:48, 21 May 2017

An environmental summary created by the ENVS 560/L Watershed Systems class at CSUMB.

This page provides links to documents relating to 303d listings and Total Maximum Daily Load (TMDL) plans in California's Central Coast Region. The page was created by the ENVS 560/L Watershed Systems class at CSUMB.

Background

Main article: TMDL

Under 1987 provisions (section 304 (1)) to the Clean Water Act of 1972, states must identify and report all water bodies which do not meet water quality or beneficial use standards. Those impaired (polluted) water bodies not meeting water quality standards must be placed on the 303d list.

States must submit updated lists every two years. Along with identification of impaired water bodies, states must also identify stressors causing the impairment (i.e. pollutants), which are also identified on the 303d list. A remediation plan must then be developed and implemented for each impaired water body listed.

These plans are known as total maximum daily loads (TMDLs). TMDLs are used to define and achieve a total maximum daily load for each pollutant causing impairment within a water body. The list also identifies where a TMDL has been approved by the Environmental Protection Agency (EPA) and implementation is available, but water quality standards have not yet been met, or an action other than a TMDL is being used to address the issue.

Summary of listing categories

The CCRWQCB has assigned grouped 303(d) listings into the following categories. Only categories 4A, 4B, and 5 are included in the 303(d) list.[1]

  • Category 1. All core uses are supported;
  • Category 2. At least one core use is supported;
  • Category 3. Insufficient information exists to make a determination;
  • Category 4A. At least one core use is not supported, however "a TMDL has been developed and approved by USEPA and is reasonably expected to result in the attainment of the water quality standard within a reasonable, specified time frame (p.10, CCRWQCB)."
  • Category 4B. At least one core use is not supported, however "an existing regulatory program is reasonably expected to result in the attainment of the water quality standard within a reasonable, specified timeframe (p.10, CCRWQCB)."
  • Category 5. At least one core use is not supported. A TMDL needs to be developed.

Central Coast 303d list documents

The 303d list for the Central Coast region of California (Region 3) is maintained by the Central Coast Regional Water Quality Control Board. The 2006 303(d) list for the Central Coast region is available as a .pdf or .xls file[2][3]. The 2010 303(d) statewide list is available as an .xls file[4] but is not available as a Central Coast-specific document as of March 2014. The 2012 303(d) statewide list was approved by the EPA on July 30, 2015 and is available via an integrated report on the State Water Resources Control Board website. Although there was some Central Coast data not included in the 2012 Integrated Report, and in those cases, decisions were carried over from the 2010 list.


Monterey Bay area reports and listings, 2015

Monterey Bay area reports and listings, 2010-2012

Please see the following pages for information on 303(d) listed waterbodies and their impairments in the Monterey Bay region.

Central Coast reports and listings, 2006-2008


Statewide listings including the Central Coast, 2010

Central Coast TMDL Projects

TMDL Projects Currently in Development (2015-2016)

References

  1. Central Coast Regional Water Quality Control Board. 2009. Clean water act sections 305(b) and 303(d) integrated report for the Central Coast region. Public review draft April. http://www.swrcb.ca.gov/centralcoast/water_issues/programs/tmdl/303d/2008_0409_draft_integrated_report.pdf
  2. CCRWQCB. 2006. 2006 CWA Section 303(d) List of Water Quality Limited Segments Requiring TMDLs (Central Coast Region). http://www.waterboards.ca.gov/water_issues/programs/tmdl/docs/303dlists2006/epa/r3_06_303d_reqtmdls.pdf
  3. CCRWQCB. 2006. List of Water Quality Limited Segments Requiring TMDLs (Central Coast Region) http://www.waterboards.ca.gov/water_issues/programs/tmdl/docs/303dlists2006/epa/state_06_303dlist.xls>
  4. CCRWQCB. 2010. Combined California 2010 303(d) list with potential sources. http://maps.waterboards.ca.gov/webmap/303d/files/2010_USEPA_approv_303d_List_Final_122311wsrcs.xls

See also

Disclaimer

This page may contain student work completed as part of assigned coursework. It may not be accurate. It does not necessary reflect the opinion or policy of CSUMB, its staff, or students.