Skip to main content
Monterey Bay National Marine Sanctuary National Marine Sanctuaries Home Page National Oceanic and Atmospheric Administration Home Page


Appendix B:
Regional Water Quality Control Board's 1998 303(d) List and TMDL Priority Schedule for Water Bodies that Drain into the Sanctuary

Regional Water Quality Control Board's 1998 303(d) List and TMDL Priority Schedule for Water Bodies that Drain into the Sanctuary

Water Body
Pollutant
Source
Area Affected
TMDL Start/End Dates*

San Gregorio Creek

Sedimentation/siltation

Nonpoint source

16 miles

2000 - 2005

Pescadero Creek

Sedimentation/siltation

Nonpoint source

21 miles

2000 - 2005

Waddell Creek, East Branch

Nutrients

Municipal point sources

3 miles

04/01 - 04/05

San Lorenzo River

Nutrients

Septage disposal; nonpoint source

25 miles

04/93-04/00

Pathogens

Urban runoff/storm sewers; septage disposal

25 miles

1999 - 2001

Sedimentation/siltation

Silviculture; construction/land development; land development; urban runoff/ storm sewers

25 miles

12/98 - 04/00

San Lorenzo River Estuary

Pathogens

Urban runoff/storm sewers; natural sources

20 acres

04/99 - 04/01

Sedimentation/siltation

Hydromodification

20 acres

01/98 - 04/00

Schwan Lake

Nutrients

Nonpoint source

32 acres

04/06 - 04/11

Pathogens

Urban runoff/storm sewers; natural sources

32 acres

04/06 - 04/11

Carbonera Creek

Nutrients

Nonpoint source

10 miles

04/93 - 04/00

Pathogens

Urban runoff/storm sewers; nonpoint source

10 miles

04/99 - 04/01

Sedimentation/siltation

Construction/land development; nonpoint source

10 miles

01/98 - 04/00

Clear Creek

Mercury

Resource extraction

2 miles

01/98 - 04/03

Lompico Creek

Nutrients

Septage disposal

5 miles

04/93 - 04/00

Pathogens

Septage disposal; natural sources; nonpoint source

5 miles

04/99 - 04/01

Sedimentation/siltation

Construction/land development; natural sources

5 miles

01/98 - 04/00

Shingle Mill Creek

Nutrients

Septage disposal

2 miles

01/98 - 04/01

Sedimentation/siltation

Construction/land development; nonpoint source

2 miles

01/98 - 04/01

Valencia Creek

Pathogens

Agriculture; septage disposal

7 miles

04/06 - 04/11

Sedimentation/siltation

Agriculture; construction/land development

7 miles

04/01 - 04/05

Water Body
Pollutant
Source
Area Affected
TMDL Start/End Dates*

Soquel Lagoon

Nutrients

Septage disposal; nonpoint source

2 acres

04/03 - 04/07

Pathogens

Urban runoff/storm sewers; natural sources; nonpoint source

2 acres

04/03 - 04/07

Sedimentation/siltation

Construction/land development

2 acres

04/01 - 04/05

Aptos Creek

Pathogens

Urban runoff/storm sewers

4 miles

04/05 - 04/11

Sedimentation/siltation

Disturbed sites (land development); channel erosion

4 miles

01/01 - 04/01

Rider Gulch Creek

Sedimentation/siltation

Agriculture; silviculture; construction/land development

2 miles

01/98 - 04/01

Watsonville Slough

Metals

Agriculture; urban runoff/storm sewers

300 acres

01/99 - 04/03

Oil and grease

Urban runoff/storm sewers; nonpoint source

300 acres

01/99 - 04/03

Pathogens

Urban runoff/storm sewers; source unknown; nonpoint source

300 acres

01/99 - 04/03

Pesticides

Agriculture; irrigated crop production; agriculture - storm runoff; agricultural return flows; nonpoint source

300 acres

01/99 - 04/03

Sedimentation/siltation

Agriculture; irrigated crop production; agriculture - storm runoff; nonpoint source

300 acres

01/98 - 04/01

Pajaro River

Nutrients

Agriculture; irrigated crop production; agriculture - storm runoff; agriculture - subsurface drainage; agriculture - irrigation tailwater; agricultural return flows; urban runoff/storm sewers; wastewater - land disposal; channelization; removal of riparia

49 miles

01/98 - 04/01

Sedimentation/siltation

Agriculture; irrigated crop production; range land; agriculture - storm runoff; resource extraction; surface mining; hydromodification; channelization; habitat modification; removal of riparian vegetation; streambank modification/ destabilization; channel

49 miles

01/98 - 04/01

Water Body
Pollutant
Source
Area Affected
TMDL Start/End Dates*

L lagas Creek

Nutrients

Municipal point sources; agriculture; irrigated crop production; pasture land; agriculture - storm runoff; agriculture - irrigation tailwater; agricultural return flows; urban runoff/storm sewers; habitat modification; nonpoint source; point source

22 miles

01/98 - 04/01

Sedimentation/siltation

Agriculture; hydro- modification; habitat modification

22 miles

01/98 - 04/01

San Benito River

Sedimentation/siltation

Agriculture; resource extraction; nonpoint source

86 miles

01/98 - 04/01

Moss Landing Harbor

Pathogens

Agriculture; nonpoint source; boat discharges/vessel wastes

40 acres

04/05 - 04/09

Pesticides

Agriculture; irrigated crop production; specialty crop production

160 acres

04/05 - 04/09

Sedimentation/siltation

Agriculture; irrigated crop production; agriculture - storm runoff; hydromodification; dredging (hydromodification); channel erosion; erosion/ siltation; nonpoint source

160 acres

04/05 - 04/09

Elkhorn Slough

Pathogens

Natural sources; nonpoint source

500 acres

04/05 - 04/09

Pesticides

Agriculture; irrigated crop production; agriculture - storm runoff; agricultural return flows; contaminated sediments; erosion/siltation; nonpoint source

500 acres

04/05 - 04/09

Sedimentation/siltation

Agriculture; irrigated crop production; agriculture - storm runoff; channel erosion; nonpoint source

50 acres

04/05 - 04/09

Hernandez Reservoir

Mercury

Subsurface mining

619 acres

01/98 - 04/03

Moro Cojo Slough

Pesticides

Agriculture; irrigated crop production; agriculture - storm runoff; agricultural return flows; nonpoint source

345 acres

01/98 - 04/11

Sedimentation/siltation

Agriculture; irrigated crop production; agriculture - storm runoff; construction/land development; nonpoint source

345 acres

01/98 - 04/11

Water Body
Pollutant
Source
Area Affected
TMDL Start/End Dates*

Tembladero Slough

Nutrients

Agriculture; irrigated crop production; agriculture - storm runoff; agricultural return flows; nonpoint source

150 acres

01/98 - 04/03

Pesticides

Agriculture; irrigated crop production; agriculture - storm runoff; agricultural return flows; nonpoint source

150 acres

01/98 - 04/03

Old Salinas River Estuary

Nutrients

Agriculture; irrigated crop production; agricultural return flows; nonpoint source

50 acres

01/98 - 04/03

Pesticides

Agriculture; irrigated crop production; agriculture - storm runoff; agriculture - irrigation tailwater; agricultural return flows; nonpoint source

50 acres

01/98 - 04/03

Salinas River

Nutrients

Agriculture

50 miles

01/98 - 04/03

Pesticides

Agriculture; irrigated crop production; agriculture - storm runoff; agriculture - irrigation tailwater; agricultural return flows; nonpoint source

50 miles

01/98 - 04/03

Salinity/TDS/chlorides

Agriculture

50 miles

01/98 - 04/03

Sedimentation/siltation

Agriculture; irrigated crop production; range land; agriculture - storm runoff; road; construction; land development; channel erosion; nonpoint source

50 miles

01/98 - 04/01

Salinas Reclamation Canal

Pesticides

Minor industrial point source; agriculture; irrigated crop production; agriculture - storm runoff; agriculture - irrigation tailwater; agricultural return flows; nonpoint source

20 miles

01/98 - 04/05

Priority organics

Minor industrial point source; agriculture; irrigated crop production; agriculture - storm runoff; agriculture - irrigation tailwater; agricultural return flows; urban runoff/storm sewers; source unknown; nonpoint source

20 miles

01/98 - 04/05

Salinas River Lagoon (North)

Nutrients

Nonpoint source

75 acres

01/98 - 04/03

Pesticides

Agriculture

75 acres

01/98 - 04/03

Sedimentation/siltation

Nonpoint source

75 acres

01/98 - 04/01

Salinas River Refuge Lagoon (South)

Nutrients

Agriculture

163 acres

01/98 - 04/01

Pesticides

Agriculture

163 acres

01/98 - 04/03

Salinity/TDS/chlorides

Agriculture

163 acres

01/98 - 04/03

Water Body
Pollutant
Source
Area Affected
TMDL Start/End Dates*

Blanco Drain

Pesticides

Agriculture; irrigated crop production; agriculture - storm runoff; agriculture - irrigation tailwater; agricultural return flows; nonpoint source

8 miles

01/98 - 04/05

Espinosa Slough

Nutrients

Agriculture; storm sewers

320 acres

01/98 - 04/03

Pesticides

Agriculture; urban runoff/storm sewers

320 acres

01/98 - 04/03

Priority organics

Nonpoint source

320 acres

01/98 - 04/03

Monterey Harbor

Metals

Railroad slag pile

74 acres

01/98 - 04/03

Unknown toxicity

Source unknown

74 acres

01/98 - 04/11

Monterey Bay South

Metals

Surface Mining

10 miles

01/98 - 04/11

Pesticides

Agriculture

10 miles

01/98 - 04/11

Nacimiento Reservoir

Metals

Subsurface mining; natural sources

5370 acres

09/97 - 04/00

Las Tablas Creek

Metals

Surface Mining

13 miles

09/97 - 04/00

Las Tablas Creek, North Fork

Metals

Surface Mining

5 miles

09/97 - 04/00

Las Tablas Creek, South Fork

Metals

Surface Mining

4 miles

09/97 - 04/00

 

* Reflects start and end dates for the TMDL assessment (does not include implementation)

URL: http://montereybay.noaa.gov/resourcepro/reports/agactioniv_99/ag99_appb.html    Reviewed: March 05, 2014
Web Site Owner: National Ocean Service

Privacy Statement | Site Disclaimer | User Survey
National Marine Sanctuaries | National Ocean Service | National Oceanic and Atmospheric Administration | USA.gov