Monterey Bay Area TMDL Listings - Priorities, Progress, and Documents
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
Pajaro River Watershed
Impaired water bodies listed downstream to upstream & north to south.
Watsonville Slough
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Low Dissolved Oxygen | 2010 | Agriculture, Removal of Riparian vegetation, Urban runoff/storm sewers | 6.2 | Estimated: 2021 | TBD |
Pathogens | 1996 | Agriculture, Collection system failure, Grazing, Landfills, Natural sources, Pasture grazing-riparian and/or upland, Urban runoff/storm sewers | 6.2 | July 19, 2007 | Based on a minimum of no less than 5 samples: Fecal coliform shall not exceed a log mean of 200MPN/100mL, and 10% of total samples must not exceed 400MPN/100mL [1] |
Pesticides | 1996 | Agriculture, Agriculture-irrigation tailwater, Agriculture storm runoff, Irrigated crop production, nonpoint source | 6.2 | Estimated: 2021 | TBD |
Turbidity | 2010 | Agriculture, Removal of riparian vegetation, Urban runoff/storm sewers | Estimated: 2021 | TBD |
Beach Road Ditch
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Low Dissolved Oxygen | 2010 | Agriculture, Removal of Riparian vegetation | 0.78 | Estimated: 2021 | TBD |
Nitrate | 2010 | Agriculture, Removal of Riparian vegetation | 0.78 | Estimated: 2021 | TBD |
Turbidity | 2010 | Agriculture, Removal of Riparian vegetation | 0.78 | Estimated: 2021 | TBD |
pH | 2010 | Agriculture | 0.78 | Estimated: 2021 | TBD |
Pajaro River
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Boron | 2006 | Agriculture, Other urban runoff, Saltwater intrustion, Source unknown | 32 | Estimated: 2021 | TBD |
Chlordane | 2010 | Source unknown | 32 | Estimated: 2021 | TBD |
Chloride | 2010 | Agriculture, Natural sources, Other urban runoff, Saltwater intrusion | 32 | Estimated: 2021 | TBD |
Chlorpyrifos | 2010 | Agriculture, other urban runoff | 32 | November 12, 2013 | 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 [2] |
DDD (Dichlorodiphenyldichloroethane) | 2010 | Source unknown | 32 | Estimated: 2013 | TBD |
Dieldrin | 2010 | Source Unknown | 32 | Estimated 2021 | TBD |
Escherichia coli (E. Coli) | 2010 | Collection system failure, natural sources, onsite wastewater systems, pasture grazing-riparian and/or upland, transient encampments, urban runoff/storm sewers | 32 | August 3, 2010 | Must not exceed 235 MPN/100mL [3] |
Fecal Coliform | 2002 | Collection system failure, natural sources, onsite wastewater systems, pasture grazing-riparian and/or upland, transient encampments, urban runoff/storm sewers | 32 | August 3, 2010 | Must not exceed 400 MPN/100mL [3] |
Low Dissolved Oxygen | 2010 | Agriculture, Grazing-related sources, Other urban runoff, Removal of riparian vegetation, Unknown nonpoint source | 32 | Estimated: 2021 | TBD |
Nitrate | 2006 | Agriculture, Urban runoff/Storm sewers | 32 | October 13, 2006 | Nitrate must not exceed 10 mg/L and 30-day mean must not exceed 5mg/L [4] |
Nutrients | 1996 | Agriculture Return flows, agriculture, agriculture-irrigation tailwater, agriculture storm runoff, agriculture subsurface drainage, channelization, irrigated crop production, nonpoint source, removal of riparina vegetation, urban runoff/storm sewers, wastewater - land disposal | 32 | July 30, 2015 | Dry Season: Nitrate < 1.8 to 3.9 mg/L, Total N < 1.1 mg/L to 2.1 mg/L, Orthophosphate < 0.4 to 0.14 mg/L Wet Season: Nitrate < 8 mg/L, Orthophosphate < 0.3 mg/L Year Round: Nitrate < 10 mg/L [5] |
PCBs (Polychlorinated biphenyls) | 2010 | Source unknown | 32 | Estimated: 2021 | TBD |
Sediment/Siltation | 1996 | Agriculture, Grazing related sources, Highway/road/bridge runoff, Silviculture, Streambank modification/destabilization, Surface mining, Urban runoff/storm sewers | 32 | May 3, 2007 | See Pajaro River Sediment Project report Figure 4.4, Page 20 |
Sodium | 2010 | Agriculture, Natural sources, Other urban runoff, Saltwater intrusion, Unknown nonpoint source | 32 | Estimated: 2021 | TBD |
Turbidity | 2010 | Agriculture, Grazing, Other urban runoff, Removal of riparian vegetation | 32 | Estimated: 2021 | TBD |
pH | 2010 | Unknown | 32 | Estimated: 2021 | TBD |
Bolsa Neuva Watershed
Impaired water bodies listed downstream to upstream, North to south
Moss Landing Harbor
Pollutant | First Listed | Possible Sources | Assessed Area (acres) | US EPA TMDL Approval Date | TMDL |
Chlorpyrifos | 2010 | Agriculture, Grazing Related Sources, Other urban runoff | 79 | 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[6] |
Diazinon | 2010 | Agriculture | 79 | 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 [6] |
Low Dissolved Oxygen | 2010 | Source unknown | 79 | October 13, 2015 | See Lower Salinas River Nutrient TMDL |
Nickel | 2010 | Agriculture, Dredging, Marinas and Recreational boating, Natural sources, Other urban runoff, Unknown sources | 79 | Estimated: 2021 | TBD |
Pathogens | 1992 | Agriculture, Boat discharges/vessel wastes, nonpoint source | 79 | Estimated: 2021 | TBD |
Pesticides | 1992 | Agriculture, Irrigated and specialty crop production | 79 | Estimated: 2021 | TBD |
Sediment Toxicity | 2010 | Agriculture, Boatyards, Dredging, Grazing related sources, marinas and recreational boating, Other urban runoff | 79 | Estimated: 2021 | TBD |
Sedimentation/Silatation | 1996 | Agriculture, agriculture-storm runoff, channel erosion, dredging, erosion/siltation, hydromodification, irrigated crop production, nonpoint source | 79 | Estimated: 2021 | TBD |
pH | 2010 | Source Unknown | 79 | Estimated: 2021 | TBD |
Bennett Slough
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Chlorophyll-a | 2010 | Source Unknown | 1.9 | Estimated: 2021 | TBD, Also See Lower Salinas TMDL |
Low Dissolved Oxygen | 2010 | Source Unknown | 1.9 | Estimated: 2021 | TBD |
pH | 2010 | Source Unknown | 1.9 | Estimated: 2021 | TBD |
Elkhorn Slough
Pollutant | First Listed | Possible Sources | Assessed Area (acres) | US EPA TMDL Approval Date | TMDL |
Low Dissolved Oxygen | 2010 | Agriculture, Grazing related sources, Natural sources, Urban runoff/storm sewers | 2034 | Estimated: 2021 | TBD |
Pesticides | 1990 | Agriculture return flows, agriculture, agriculture-storm runoff, contaminated sediments, erosion/siltation, irrigated crop production, nonpoint source | 2034 | Estimated: 2021 | TBD |
Sedimentation/Siltation | 1996 | Agriculture, agriculture-storm runoff, channel erosion, irrigated crop production, nonpoint source | 2034 | Estimated: 2021 | TBD |
Total Coliform | 2010 | Source unknown | 2034 | Estimated: 2021 | TBD |
pH | 2010 | Agriculture, grazing related sources, natural sources, urban runoff/storm sewers | 2034 | Estimated: 2021 | TBD |
Watsonville Creek
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
E. Coli | 2010 | Agriculture, Grazing related sources, Natural Sources | 5.1 | Estimated: 2021 | TBD |
Fecal Coliform | 2010 | Agriculture, Grazing related sources, Natural Sources | 5.1 | Estimated: 2021 | TBD |
Low Dissolved Oxygen | 2010 | Agriculture, Grazing related sources, Groundwater loadings, Removal of riparian vegetation | 5.1 | Estimated: 2021 | TBD |
Nitrate | 2010 | Agriculture, Grazing related sources, Groundwater loadings, Removal of riparian vegetation | 5.1 | Estimated: 2021 | TBD |
pH | 2010 | Agriculture, Grazing related sources, Groundwater loadings, Removal of riparian vegetation | 5.1 | Estimated: 2021 | TBD |
Carneros Creek
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Ammonia, Unionized | 2006 | Source Unknown | 12 | Estimated: 2021 | TBD |
Chlorophyll-a | 2010 | Agriculture | 12 | Estimated: 2021 | TBD |
Fecal Coliform | 2010 | Agriculture, natural sources | 12 | Estimated: 2021 | TBD |
Low Dissolved Oxygen | 2010 | Agriculture | 12 | Estimated: 2021 | TBD |
Turbidity | 2010 | Agriculture, Source unknown | 12 | Estimated: 2021 | TBD |
pH | 2010 | Agriculture, Source unknown | 12 | Estimated: 2021 | TBD |
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 [7] 2012: Source Unknown | 7.8 | Est. 2021 | TBD |
Salinas Valley Watershed
Impaired water bodies in the Salinas Watershed listed downstream to upstream & north to south.
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 | Year Round un-ionized ammonia as N must not exceed 0.025mg/L [8] |
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 Estuary
Pollutant | First Listed | Possible Sources | Assessed Area (acres) | US EPA TMDL Approval Date | TMDL |
Nutriensts | 1992 | Agriculture, Agriculture-irrigation tailwater, irrigated crop production, nonpoint source | 16 | October 13, 2015 | See Lower Salinas River Nutrient TMDL |
Pesticides | 1990 | Agriculture return flows, agriculture, agriculture-irrigation tailwater, agriculture-storm runoff, irrigated crop production, nonpoint source | 16 | October 7, 2011 | Will be heard at the May 12-13, 2016 Central Coast Water Board hearing in Watsonville, also see Chlorpyrifos & Diazinon[6] |
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.[9] |
Low Dissolved Oxygen | 2010 | Agriculture, Marinas and Recreational Boating, Other Urban Runoff, Removal of Riparian Vegetation | 3.8 | October 13, 2015 | See Lower Salinas River Nutrient TMDL |
Nitrate | 2010 | Agriculture, Other urban runoff | 3.8 | October 13, 2015 | See Lower Salinas River Nutrient TMDL |
Sediment Toxicity | 2010 | Agriculture, Other urban runoff | 3.8 | Estimated: 2013 | Will be heard @ Central Coast Water Board hearing May 12-13 2016 [10] |
Turbidity | 2010 | Agriculture, Other urban runoff | 3.8 | Estimated: 2013 | TBD |
Unknown Toxicity | 2010 | Agriculture, Other urban runoff | 3.8 | Estimated: 2013 | TBD |
pH | 2010 | Agriculture, Other urban runoff | 3.8 | Estimated: 2013 | TBD |
Salinas River Lagoon (North)
Pollutant | First Listed | Possible Sources | Assessed Area (acres) | US EPA TMDL Approval Date | TMDL |
Pesticides | 1992 | Agriculture | 197 | TBD | TBD |
Nutrients | 1992 | Nonpoint Source | 197 | October 13, 2015 | Dry Season: Nitrate < 1.4 to 6.4 mg/L, Orthophosphate < 0.7 to 0.13 mg/L Wet Season: Nitrate < 8 mg/L, Orthophosphate < 0.3 mg/L Year Round: Nitrate < 10 mg/L |
Majors Creek
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Copper | 2010 | Source unknown, Urban runoff/Storm sewers | Estimated: 2021 | TBD | |
E. Coli | 2010 | Natural Sources, Source unknown, Urban runoff/storm sewers | Estimated: 2021 | TBD | |
Lead | 2010 | Source unknown, Urban runoff/storm sewers | Estimated: 2021 | TBD | |
Zinc | 2010 | Source unknown, Urban runoff/storm sewers | Estimated: 2021 | TBD |
Blanco Drain
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Chlorpyrifos | 2010 | Agriculture, Other urban runoff | 15 | 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[6] |
Diazinon | 2010 | Agriculture | 15 | 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 [6] |
Low Dissolved Oxygen | 2010 | Agriculture, groundwater loadings | 15 | October 13, 2015 | See Lower Salinas River Nutrient TMDL |
Nitrate | 2010 | Agriculture, groundwater loadings | 15 | October 13, 2015 | Dry Season: Nitrate < 1.4 to 6.4 mg/L Wet Season: Nitrate < 8 mg/L, Year Round: Nitrate < 10 mg/L [8] |
Pesticides | 1998 | Agriculture return flows, Agriculture, Agriculture-irrigation tailwater, Agriculture storm runoff, Irrigated crop production, nonpoint source | 15 | October 7, 2011 | See Chlorpyrifos & Diazinon[6] |
Turbidity | 2010 | Agriculture, Removal of riparian vegetation | 15 | Estimated: 2013 | TBD |
Tembladero Slough
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Chlorophyll-a | 2010 | Agriculture, Grazing, Removal of riparian vegetation, Urban runoff/storm sewers | 5.5 | Estimated: 2013 | TBD |
Chlorpyrifos | 2010 | Agriculture, Grazing related sources, Urban runoff/storm sewers | 5.5 | 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[6] |
Diazinon | 2010 | Agriculture, Grazing related sources, Urban runoff/storm sewers | 5.5 | 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 [6] |
Enterococcus | 2010 | Agriculture, Grazing related sources, Urban runoff/storm sewers | 5.5 | Estimated: 2013 | TBD, See Fecal Coliform |
E. Coli | 2010 | Agriculture, Grazing related sources, Urban runoff/storm sewers, Natural sources | 5.5 | Estimated: 2013 | TBD, See Fecal Coliform |
Fecal Coliform | 2002 | Agriculture, Natural sources, Pasture grazing-riparian and/or upland, urban runoff/storm sewers | 5.5 | 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.[9] |
Nitrate | 2010 | Agriculture, urban runoff/storm sewers | 5.5 | October 13, 2015 | Dry Season: Nitrate < 1.4 to 6.4 mg/L Wet Season: Nitrate < 8 mg/L, Year Round: Nitrate < 10 mg/L [8] |
Nutrients | 1996 | Agriculture Return flows, agriculture, agriculture-irrigation tailwater, agriculture-storm runoff, irrigated crop production, nonpoint source | 5.5 | October 13, 2015 | See Lower Salinas River Nutrient TMDL |
Pesticides | 1996 | Agriculture Return flows, agriculture, agriculture-irrigation tailwater, agriculture-storm runoff, irrigated crop production, nonpoint source | 5.5 | October 7, 2011 | See Chlorpyrifos & Diazinon[6] |
Sediment Toxicity | 2010 | Agriculture, grazing related sources, urban runoff/storm sewers | 5.5 | Estimated: 2013 | Will be heard at the May 12-13 2016 Central Coast Water Board hearing in Watsonville[10] |
Total Coliform | 2010 | Agriculture, grazing related sources, natural sources, urban runoff/storm sewers | 5.5 | Estimated: 2013 | TBD, see also Fecal Coliform |
Turbidity | 2010 | Agriculture, grazing related sources, natural sources, urban runoff/storm sewers | 5.5 | Estimated: 2013 | TBD |
Unknown Toxicity | 2010 | Agriculture, grazing related sources, natural sources, urban runoff/storm sewers | 5.5 | Estimated: 2013 | TBD |
pH | 2010 | Agriculture, grazing related sources, natural sources, urban runoff/storm sewers | 5.5 | Estimated: 2013 | TBD |
Salinas Reclamation Canal
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Ammonia, Unionized | 2006 | Agriculture, Grazing, Urban runoff--Industrial Permitted & Non industrial permitted, urban runoff/storm sewers | 7.7 | October 13, 2015 | Year Round un-ionized ammonia as N must not exceed 0.025mg/L [8] |
Chlorpyrifos | 2010 | Agriculture, Grazing, Urban runoff--Industrial Permitted & Non industrial permitted, urban runoff/storm sewers | 7.7 | 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[6] |
Copper | 2010 | Agriculture, Grazing, Urban runoff--Industrial Permitted & Non industrial permitted, urban runoff/storm sewers | 7.7 | Estimated: 2018 | TBD |
Diazinon | 2010 | Agriculture, Grazing, Urban runoff--Industrial Permitted & Non industrial permitted, urban runoff/storm sewers | 7.7 | 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 [6] |
E. Coli | 2010 | Agriculture, Grazing, Natural sources, Urban runoff--Industrial Permitted & Non industrial permitted, urban runoff/storm sewers | 7.7 | Estimated: 2013 | TBD, See also Lower Salinas Fecal Coliform TMDL |
Fecal Coliform | 2002 | Agriculture, Grazing, Removal of riparian vegetation, Urban runoff--Industrial Permitted & Non industrial permitted, urban runoff/storm sewers | 7.7 | 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.[9] |
Low Dissolved Oxygen | 2002 | Agriculture, Grazing, Removal of riparian vegetation, Urban runoff--Industrial Permitted & Non industrial permitted, urban runoff/storm sewers | 7.7 | October 13, 2015 | See Lower Salinas River Nutrients TMDL |
Nitrate | 2010 | Agriculture, Urban runoff, Storm sewers | 7.7 | October 13, 2015 | Dry Season: Nitrate < 1.4 to 6.4 mg/L Wet Season: Nitrate < 8 mg/L, Year Round: Nitrate < 10 mg/L [8] |
Pesticides | 1992 | Agriculture, Agriculture return flows, agriculture irrigation tailwater, agriculture storm runoff, irrigated crop production, minor industrial point source, nonpoint source | 7.7 | October 7, 2011 | Will be heard at the May 12-13, 2016 Central Coast Water Board hearing in Watsonville, also see Chlorpyrifos & Diazinon[6] |
Priority Organics | 1996 | Agriculture, Agriculture return flows, agriculture irrigation tailwater, agriculture storm runoff, irrigated crop production, minor industrial point source, nonpoint source, unknown source | 7.7 | Estimated: 2013 | TBD |
Sediment Toxicity | 2010 | Agriculture, Grazing, Removal of riparian vegetation, urban runoff-- Industrial and Non industrial permitted, urban runoff/storm sewers | 7.7 | Estimated: 2013 | Will be heard at the May 12-13 2016 Central Coast Water Board hearing in Watsonville[10] |
Turbidity | 2010 | Agriculture, Grazing, Removal of riparian vegetation, urban runoff-- Industrial and Non industrial permitted, urban runoff/storm sewers | 7.7 | Estimated: 2013 | TBD |
Unknown Toxicity | 2010 | Agriculture, Grazing, Removal of riparian vegetation, urban runoff-- Industrial and Non industrial permitted, urban runoff/storm sewers | 7.7 | Estimated: 2013 | TBD |
pH | 2010 | Agriculture, Grazing, Removal of riparian vegetation, urban runoff-- Industrial and Non industrial permitted, urban runoff/storm sewers | 7.7 | Estimated: 2013 | TBD |
Gabilan Creek
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Ammonia, Unionized | 2010 | Agriculture, Grazing, Other urban runoff | 6.4 | October 13, 2015 | Year Round un-ionized ammonia as N must not exceed 0.025mg/L [8] |
Fecal Coliform | 2002 | Agriculture, Grazing, Other urban runoff | 6.4 | 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.[9] |
Nitrate | 2006 | Agriculture, Grazing, Other urban runoff | 6.4 | October 13, 2015 | Dry Season: Nitrate < 1.4 to 6.4 mg/L Wet Season: Nitrate < 8 mg/L, Year Round: Nitrate < 10 mg/L [8] |
Sediment Toxicity | 2010 | Agriculture, Grazing, Other urban runoff | 6.4 | Estimated: 2013 | Will be heard at the May 12-13 2016 Central Coast Water Board hearing in Watsonville[10] |
Turbidity | 2010 | Agriculture, Grazing, Other urban runoff | 6.4 | Estimated: 2013 | TBD |
pH | 2010 | Agriculture, Grazing, Other urban runoff | 6.4 | Estimated: 2013 | TBD |
Natividad Creek
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Ammonia, Unionized | 2010 | Agriculture, Grazing, Other urban runoff | 7 | October 13, 2015 | Year Round un-ionized ammonia as N must not exceed 0.025mg/L [8] |
E. Coli | 2010 | Agriculture, Grazing, Other urban runoff | 7 | Estimated: 2013 | TBD, See also Lower Salinas Fecal Coliform TMDL |
Low Dissolved Oxygen | 2010 | Agriculture, Grazing, Removal of riparian vegetation, Other urban runoff | 7 | October 13, 2015 | See Lower Salinas River Nutrients TMDL |
Nitrate | 2006 | Agriculture, Grazing, Other urban runoff, removal of riparian vegetation | 7 | October 13, 2015 | Dry Season: Nitrate < 1.4 to 6.4 mg/L Wet Season: Nitrate < 8 mg/L, Year Round: Nitrate < 10 mg/L [8] |
Sediment Toxicity | 2010 | Agriculture, Grazing, Other urban runoff, removal of riparian vegetation | 7 | Estimated: 2013 | Will be heard at the May 12-13 2016 Central Coast Water Board hearing in Watsonville[10] |
Temperature, water | 2010 | Agriculture, Grazing, Other urban runoff, removal of riparian vegetation | 7 | Estimated: 2013 | TBD |
Turbidity | 2010 | Agriculture, Grazing, Other urban runoff, removal of riparian vegetation | 7 | Estimated: 2013 | TBD |
Unknown Toxicity | 2010 | Agriculture, Grazing, Other urban runoff, removal of riparian vegetation | 7 | Estimated: 2013 | TBD |
pH | 2010 | Agriculture, Grazing, Other urban runoff | 7 | Estimated: 2013 | TBD |
Alisal Creek
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Chlorophyll-a | 2010 | Agriculture | 16 | Estimated: 2013 | TBD, Also See Lower Salinas TMDL |
Fecal Coliform | 2002 | Agriculture, Natural sources, Nonpoint source, urban runoff/storm sewers | 16 | 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.[9] |
Nitrate | 2002 | Agriculture, nonpoint source, urban runoff/storm sewers | 16 | October 13, 2015 | Dry Season: Nitrate < 1.4 to 6.4 mg/L Wet Season: Nitrate < 8 mg/L, Year Round: Nitrate < 10 mg/L [8] |
Sodium | 2010 | Agriculture, nonpoint source, urban runoff/storm sewers | 16 | Estimated: 2018 | TBD |
Alisal Slough[11]
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Low Dissolved Oxygen | 2010 | 2010:Agriculture 2012: Source Unknown [12] | 7.3 | October 13, 2015 | See Lower Salinas River Nutrients TMDL |
Nitrate | 2010 | 2010:Agriculture 2012: Source Unknown | 7.3 | October 13, 2015 | See Lower Salinas River Nutrient TMDL |
Sediment Toxicity | 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 |
Quail Creek
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Ammonia (Unionized) | 2010 | Agriculture, Grazing, Nurseries | 4.2 | October 13, 2015 | Year Round un-ionized ammonia as N must not exceed 0.025mg/L [8] |
Chlorpyrifos | 2010 | Agriculture, Grazing, Nurseries | 4.2 | 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[6] |
Diazinon | 2010 | Agriculture, Grazing, Nurseries | 4.2 | 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 [6] |
E. Coli | 2010 | Agriculture, Grazing, Nurseries | 402 | Estimated: 2013 | TBD, See also Fecal Coliform |
Fecal Coliform | 2010 | Agriculture, Grazing, Nurseries | 4.2 | 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.[9] |
Low Dissolved Oxygen | 2010 | Agriculture, Grazing, Nurseries, Removal of Riparian Vegetation | 4.2 | October 13, 2015 | TBD, See also Lower Salinas River Nutrient TMDL |
Nitrate | 2006 | Agriculture, Grazing, Nurseries, Removal of Riparian Vegetation | 4.2 | October 13, 2015 | Dry Season: Nitrate < 1.4 to 6.4 mg/L Wet Season: Nitrate < 8 mg/L, Year Round: Nitrate < 10 mg/L [8] |
Sediment Toxicity | 2010 | Agriculture, Grazing, Nurseries | 4.2 | Estimated: 2013 | Will be heard at the May 12-13 2016 Central Coast Water Board hearing in Watsonville[10] |
Temperature, water | 2010 | Agriculture, Removal of Riparian Vegetation | 4.2 | Estimated: 2013 | TBD |
Turbidity | 2010 | Agriculture, Grazing, Removal of Riparian Vegetation | 4.2 | Estimated: 2013 | In Development |
Unknown Toxicity | 2010 | Agriculture, Grazing, Nurseries | 4.2 | Estimated: 2013 | TBD |
Chualar Creek
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Ammonia (Unionized) | 2010 | Agriculture, Other Urban Runoff, Removal of Riparian Vegetation | 14 | October 13, 2015 | Year Round un-ionized ammonia as N must not exceed 0.025mg/L [8] |
Chlorpyrifos | 2010 | Agriculture, Other urban runoff | 14 | 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[6] |
Diazinon | 2010 | Agriculture, Other urban runoff | 14 | 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 Diazinon must not exceed 0.10ppb [6] |
E. Coli | 2010 | Agriculture, Natural Sources, Other urban runoff | 14 | TBD, See also Fecal Coliform | |
Fecal Coliform | 2010 | Agriculture, Natural Sources, Other urban runoff | 14 | 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.[9] |
Nitrate | 2010 | Agriculture, Natural Sources, Other urban runoff | 14 | October 13, 2015 | Dry Season: Nitrate < 1.4 to 6.4 mg/L Wet Season: Nitrate < 8 mg/L, Year Round: Nitrate < 10 mg/L [8] |
Temperature, water | 2010 | Agriculture, other urban runoff, removal of riparian vegetation | 14 | Estimated: 2013 | TBD |
Turbidity | 2010 | Agriculture, other urban runoff, removal of riparian vegetation | 14 | Estimated: 2013 | TBD |
Unknown Toxicity | 2010 | Agriculture, Urban Runoff/Storm Sewers | 14 | Estimated: 2013 | TBD |
pH | 2010 | Agriculture, Urban Runoff/Storm Sewers | 14 | Estimated: 2013 | TBD |
Salinas River (Lower, estuary to near Gonzales Rd crossing)
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Chlordane | 2010 | Unknown | 31 | Estimated: 2013 | TBD |
Chloride | 2010 | Agriculture, Grazing, Natural Sources, other urban runoff | 31 | Estimated: 2018 | TBD |
Chlorpyrifos | 2010 | Agriculture, Grazing, Other urban runoff | 31 | 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[6] |
DDD (Dichlorodiphenyldichloroethane) | 2010 | Source Unknown | 31 | October 7, 2011 | See Diazinon & Chlorpyrifos [6] |
Diazinon | 2010 | Agriculture, Grazing | 31 | 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 [6] |
Dieldrin | 2010 | Source Unknown | 31 | October 7, 2011 | See Diazinon & Chlorpyrifos [6] |
Electrical Conductivity | 2010 | Source Unknown | 31 | Estimated: 2013 | TBD |
Enterococcus Bacteria | 2010 | Agriculture, Grazing, Illigal dumping, Natural sources, Pasture Grazing-Riparian and/or Upland, Transient encampments, Urban Runoff/storm sewers | 31 | Estimated: 2013 | TBD |
E. Coli | 2010 | Agriculture, Grazing, Illigal dumping, Natural sources, Pasture Grazing-Riparian and/or Upland, Transient encampments, Urban Runoff/storm sewers | 31 | Estimated: 2013 | TBD, See also Lower Salinas Fecal Coliform TMDL |
Fecal Coliform | 2002 | Agriculture, Grazing, Illigal dumping, Natural sources, Pasture Grazing-Riparian and/or Upland, Transient encampments, Urban Runoff/storm sewers | 31 | 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.[9] |
Nitrate | 2006 | Agriculture, Grazing, Urban runoff, Storm sewers | 31 | October 13, 2015 | Dry Season: Nitrate < 1.4 to 6.4 mg/L Wet Season: Nitrate < 8 mg/L, Year Round: Nitrate < 10 mg/L [8] |
PCBs (Polychlorinated biphenyls) | 2010 | Source Unknown | 31 | Estimated: 2013 | TBD |
Pesticides | 1998 | Agriculture, Construction/Land Development, Point source, Urban runoff/Storm Sewers | 31 | October 7, 2011 | Will be heard at the May 12-13, 2016 Central Coast Water Board hearing in Watsonville, also see Chlorpyrifos & Diazinon[6] |
Sodium | 2010 | Source Unknown | 31 | Estimated: 2018 | TBD |
Total Dissolved Solids | 2010 | Source Unknown | 31 | Estimated: 2018 | TBD |
Toxaphene | 1994 | Source unknown | 31 | Estimated: 2013 | TBD |
Turbidity | 2010 | Agriculture, Grazing, Other urban runoff | 31 | Estimated: 2013 | TBD |
Unknown Toxicity | 2010 | Agriculture, Grazing, Other urban runoff | 31 | Estimated: 2013 | TBD |
pH | 2010 | Source Unknown | 31 | Estimated: 2013 | TBD |
Salinas River (middle, near Gonzales Rd crossing to confluence with Nacimiento River)
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
E. Coli | 2010 | Agriculture, Grazing, Land Development, Natural Sources, Other Urban Runoff | 72 | Estimated: 2021 | See also Lower Salinas Watershed Fecal Coliform TMDL |
Fecal Coliform | 2010 | Agriculture, Grazing, Natural Sources, Other Urban Runoff | 72 | Estimated: 2021 | TBD, See also Lower Salinas River |
Pesticides | 2002 | Agriculture Return Flows, Agriculture, Agriculture-irrigation tailwater, Agriculture-storm runoff, Irrigated Crop production, Nonpoint source | 72 | Estimated: 2021 | TBD |
Temperature, Water | 2010 | Agriculture, Grazing, Other Urban runoff | 72 | Estimated: 2021 | TBD |
Turbidity | 2010 | Agriculture, Grazing, Other Urban runoff | 72 | Estimated: 2021 | TBD |
Unknown Toxicity | 2010 | Agriculture, Grazing, Other Urban runoff | 72 | Estimated: 2021 | TBD |
pH | 2010 | Agriculture, Grazing, Natural sources, Other Urban runoff | 72 | Estimated: 2021 | TBD |
Salinas River (upper,confluence of Nacimiento River to Santa Margarita Reservoir)
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Chloride | 2002 | Agriculture, Pasture grazing- Riparian and/or Upland, Urban Runoff/Storm Sewers | 49 | Estimated: 2021 | TBD |
Sodium | 2002 | Agriculture, Pasture grazing- Riparian and/or Upland, Urban Runoff/Storm Sewers | 49 | Estimated: 2021 | TBD |
pH | 2010 | Agriculture, Pasture grazing- Riparian and/or Upland, Natural Sources, Urban Runoff/Storm Sewers | 49 | Estimated: 2021 | TBD |
Espinosa Lake
Pollutant | First Listed | Possible Sources | Assessed Area (acres) | US EPA TMDL Approval Date | TMDL |
Chlorpyrifos | 2010 | Unknown | 163 | 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[6] |
Diazinon | 2010 | Agriculture | 163 | 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 [6] |
Espinosa Slough
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Ammonia, Unionized | 2010 | Agriculture | 1.4 | October 13, 2015 | Year Round un-ionized ammonia as N must not exceed 0.025mg/L [8] |
Diazinon | 2010 | Agriculture | 1.4 | 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 [6] |
Nitrate | 2010 | Agriculture | 1.4 | October 13, 2015 | Dry Season: Nitrate < 1.4 to 6.4 mg/L Wet Season: Nitrate < 8 mg/L, Year Round: Nitrate < 10 mg/L [8] |
Pesticides | 1996 | Agriculture, Urban runoff/storm sewers | 1.4 | October 7, 2011 | Will be heard at the May 12-13, 2016 Central Coast Water Board hearing in Watsonville, also see Chlorpyrifos & Diazinon[6] |
Priority Organics | 1996 | Nonpoint source | 1.4 | Estimated: 2013 | TBD |
Sediment Toxicity | 2010 | Agriculture | 1.4 | Estimated: 2013 | Will be heard at the May 12-13 2016 Central Coast Water Board hearing in Watsonville[10] |
Turbidity | 2010 | Agriculture | 1.4 | Estimated: 2013 | TBD |
Unknown Toxicity | 2010 | Agriculture | 1.4 | Estimated: 2013 | TBD |
pH | 2010 | Agriculture | 1.4 | Estimated: 2013 | TBD |
Esperanza Creek
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Nitrate | 2010 | Unknown | 3.7 | October 13, 2015 | Dry Season: Nitrate < 1.4 to 6.4 mg/L Wet Season: Nitrate < 8 mg/L, Year Round: Nitrate < 10 mg/L [8] |
Arroyo Seco River
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Fecal Coliform | 2010 | Unknown | 43 | Estimated: 2021 | TBD |
Temperature, water | 2010 | Unknown | 43 | Estimated 2021 | TBD |
San Lorenzo Creek
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
Boron | 2002 | Unknown | 49 | Estimated: 2021 | TBD |
Chloride | 2010 | Grazing-Related sources, Natural source, Unknown sources | 49 | Estimated 2021 | TBD |
Electrical Conductivity | 2010 | Natural Sources | 49 | Estimated 2021 | TBD |
E. Coli | 2010 | Grazing Related Sources, Natural Sources | 49 | Estimated: 2021 | TBD, see also Fecal Coliform |
Fecal Coliform | 2002 | Grazing Related sources, Natural Sources | November 30, 2011 | Geometric mean should not exceed 126/100mL, no sample shoudl exceed the 90% confidence level of 409/100mL [13] | |
Sodium | 2010 | Grazing Related sources, Natural Sources | 49 | Estimated: 2120 | TBD |
pH | 2010 | Grazing Related sources, Natural Sources | 49 | Estimated: 2120 | TBD |
San Antonio River
Pollutant | First Listed | Possible Sources | Assessed Area (miles) | US EPA TMDL Approval Date | TMDL |
E. Coli | 2010 | Natural Sources, Source Unknown | 11 | November 30, 2011 | Must not exceed log mean of 200\100mL, nor shall more than 10% of samples exceed 400/100mL [14] |
Fecal Coliform | 2010 | Natural Sources, Source Unknown | 11 | November 30, 2011 | Must not exceed log mean of 200\100mL, nor shall more than 10% of samples exceed 400/100mL [14] |
San Antonio Resevoir
Pollutant | First Listed | Possible Sources | Assessed Area (acres) | US EPA TMDL Approval Date | TMDL |
Mercury | 2010 | Source Unknown | 5417 | Estimated: 2021 | TBD |
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[15] | 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)[16] |
Sedimentation/Siltation, 5A | 1990 | Channel erosion, land development | 8.4 | Estimated 2021 | TBD |
- Harkins Slough
- Chlorophyll-a, Category 5A
- Low Dissolved Oxygen, Category 5A
- Pathogens, Category 5B
Links
- TMDLs in the Monterey Bay Region of California
- The 303d list of Impaired Waterbodies in the Monterey Bay Region
- Lower Salinas River Watershed Nutrient TMDL - Implementation and Monitoring Progress
- TMDL
- Monterey Bay Region
- Clean Water Act
- Watershed Issues on the Central Coast of California
- Central Coast Water Quality Coalition
References
- ↑ Watsonville Slough Pathogen TMDL
- ↑ Pajaro River watershed Chlorpyrifos and Diazinon TMDL
- ↑ 3.0 3.1 Pajaro River Fecal Coliform TMDL
- ↑ Pajaro River Nitrate TMDL
- ↑ Pajaro River Nutrient TMDL
- ↑ 6.00 6.01 6.02 6.03 6.04 6.05 6.06 6.07 6.08 6.09 6.10 6.11 6.12 6.13 6.14 6.15 6.16 6.17 6.18 6.19 6.20 6.21 6.22 6.23 6.24 LOWER SALINAS RIVER WATERSHED CHLORPYRIFOS AND DIAZINON TMDLS
- ↑ 2010 Integrated Report Alamo Creek Impairments
- ↑ 8.00 8.01 8.02 8.03 8.04 8.05 8.06 8.07 8.08 8.09 8.10 8.11 8.12 8.13 8.14 8.15 8.16 8.17 [1]
- ↑ 9.0 9.1 9.2 9.3 9.4 9.5 9.6 9.7 Lower Salinas Fecal Coliform TMDL
- ↑ 10.0 10.1 10.2 10.3 10.4 10.5 10.6 Salinas River Watershed Sediment Toxicity TMDL
- ↑ Supporting Info for Alisal Creek
- ↑ 2012 Integrated Report 303(d) list
- ↑ San Lorenzo Creek Fecal Coliform TMDL
- ↑ 14.0 14.1 San Antonio River Fecal Coliform TMDL
- ↑ [CCRWQCB Aptos Creek Impairments and Evidence CCRWQCB Aptos Creek Impairments and Evidence]
- ↑ US EPA Aptos TMDL Approval Letter
Disclaimer
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