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.
- See also: The 303d list of Impaired Waterbodies in the Monterey Bay Region
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 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]
|
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