Difference between revisions of "Monterey Bay Area TMDL Listings - Priorities, Progress, and Documents"
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− | ====Alisal Slough | + | ====Alisal Slough<Ref>[http://www.waterboards.ca.gov/water_issues/programs/tmdl/2012state_ir_reports/00873.shtml#22625 Supporting Info for Alisal Creek]</ref>==== |
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Revision as of 17:33, 31 March 2016
This page on the Monterey Bay Area TMDL listings is intended to provide an overview of agency determinations for the various listed waterbodies in the Monterey Bay. This page was created by the ENVS 560/L Watershed Systems class at CSUMB.
Contents
Monterey Bay Area Listings
- See also: Summary of listing categories
Alamo Creek
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Fecal Coliform, 5A | 2002 | 2010: Agriculture, Grazing, Natural Sources [1] 2012: Source Unknown | 7.8 | Est. 2021 | TBD |
Alisal Slough[2]
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Low Dissolved Oxygen, 5A | 2010 | 2010:Agriculture 2012: Source Unknown [3] | 7.3 | October 13, 2015 | See Lower Salinas River TMDL |
Nitrate, 5A | 2010 | 2010:Agriculture 2012: Source Unknown | 7.3 | October 13, 2015 | See Lower Salinas River Nutrient TMDL |
Sediment Toxicity, 5A | 2010 | 2012: Source Unknown | 7.3 | TBD | Estimated 2013 |
Unknown Toxicity (Chlorpyrifos), 5A | 2010 | 2012: Source Unknown | 7.3 | See Lower Salinas River | Estimated 2025 |
Aptos Creek
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Fecal Coliform, 5A | 1990 | Collection System Failure, Natural Sources, Onsite Wastewater Systems (Septic Tanks), Pasture Grazing-Riparian and/or Upland, Urban Runoff/Storm Sewers[4] | 8.4 | January 20, 2011 | Fecal Coliform concentration shall not exceed - 200 MPN/100mL (w/ no less than 5 samples for any 30-day period) or 400 MPN/100mL (for no more than 10% of single samples collected during any 30-day period)[5] |
Sedimentation/Siltation, 5A | 1990 | Channel erosion, land development | 8.4 | Estimated 2021 | TBD |
Moro Cojo Slough
Pollutant | First Listed | Possible Sources | Assessed Area (acres) | US EPA TMDL Approval Date | TMDL |
Ammonia (Unionized), 5A | 2006 | Agriculture, Boat Discharges, Grazing, Unknown | 62 | October 13, 2015[6] | See Lower Salinas River |
E. Coli | 2010 | Agriculture, Boat Discharges, Grazing, Natural Sources, Unknown | 62 | TBD | Estimated 2021 |
Low Dissolved Oxygen | 2002 | Source Unknown | 62 | TBD | Estimated 2021 |
Pesticides | 2002 | Agriculture, Grazing, Riparian Vegetation Removal, Unknown | 62 | Estimated 2021 | No data since 2006 |
Sedimentation/Siltation | 2002 | Agriculture, Construction/Land Development, Nonpoint source | 62 | Estimated 2021 | No data since 2006 |
Total Coliform | 2010 | Source Unknown | 62 | Estimated 2021 | TBD |
pH | 2010 | Agriculture, Boat Discharges, Grazing, Natural Sources, Removal of Riparian Vegetation, Unknown | 62 | Estimated 2021 | TBD |
Old Salinas River
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Chlorophyll-a | 2010 | Agriculture, Dredging, Other urban runoff, Removal of Riparian Vegetation | 3.8 | TBD | TMDL needed, Also See Lower Salinas TMDL |
Chlorpyrifos | 2010 | Agriculture, Other urban runoff | 3.8 | October 7, 2011 | 1-hour average of Chlorpyrifos must not exceed 0.025ppb more than once in a three year period, and 4-day average of Chlorpyriffos must not exceed 0.015ppb |
Diazinon | 2010 | Agriculture, Other urban runoff | 3.8 | October 7, 2011 | 1-hour average of Diazinon must not exceed 0.16 ppb more than once in a three year period, and 4-day average of Chlorpyriffos must not exceed 0.10ppb |
Fecal Coliform | 2010 | Agriculture, Marinas and Recreational boating, natural sources, other urban runoff | 3.8 | January 31, 2012 | Shall not exceed an average of 200 MPN per 100mL, and 10% of samples collected may not exceed 400 MPN per 100mL based on a min of 5 samples in any 30-day period.[7] |
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