California Stormwater Intelligence

← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Guadalupe Slough

Waterbody ID (WBID): CAR2051000020110829223355
County / counties: Santa Clara
Regional Water Board: Regional Board 2 - San Francisco Bay Region
Waterbody type: River & Stream
Condition category: Category 5 — 303(d) listed, TMDL required
Integrated Report cycle: 2026

303(d) listings (1)

Each row is one official listing decision from Appendix A of the Final 2026 California Integrated Report. Source terminology is preserved as published.

Pollutant / stressor	Decision ID	Final listing decision	Decision status	TMDL requirement status	TMDL project	TMDL priority
ToxicityTotal Toxics	151294	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low

Source & provenance

Agency: California State Water Resources Control Board
Report: Final 2026 California Integrated Report
Dataset: Appendix A — 2026 303(d) List of Impaired Waters
Imported: Aug 21, 2026, 12:44 AM UTC
Waterbody ID: CAR2051000020110829223355
CALWNUM: 2205.5004
WBD code: 180500030405, 180500041001
Geometry: Official Water Board GIS (CA_WATERBOARDS_GIS_FINAL_2026)

View official Water Board fact sheet ↗Download Appendix A source file ↗

Location

Official 2026 Water Board geometry. Demonstration facility markers are shown for context only.

Loading map…

Watershed: —
Assessed size: 5.77 Miles

Derived facility associations

Industrial stormwater facilities geographically associated with this waterbody. These are derived spatial associations, not Water Board findings.

Derived

Redwood City · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · No Exposure Certification · 0.99 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

AI Industries LLC

Redwood City · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Alpha Acid Brewing Co LLC

Belmont · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Apex Die Corporation

San Carlos · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Cupertino · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Applied Materials Arques Campus

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Applied Materials B71

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Applied Materials B72

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Applied Materials B73

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Applied Materials B74

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Applied Materials B75

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Armstrong Technology Inc

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

AstraZeneca Redwood City

Redwood City · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Atlas Screw Machine Products Company Incorporated

San Francisco · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Auris Health Incorporate

Redwood City · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Bay Counties Waste Services

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

San Carlos · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Bottling Group LLC

Hayward · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · Notice of Intent · 0.76 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Cisco Systems Inc Site MTV

Mountain View · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Clean Harbors Env SVCS Inc

Redwood City · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

CMI Transportation LLC

Oakland · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Davis Street Transfer Station

San Leandro · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

DHL Express PAO

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Dominick Chirichillo Wines LLC DBA Domenico Winery

San Carlos · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Durect Corporation

Cupertino · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Durect Corporation

Cupertino · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Durham Trans Inc

San Carlos · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Ettore Products Co

Alameda · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

FedEx Express Corp COAA

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Saratoga · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Int Disposal Corp Newby Island

Milpitas · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Intel Corp Bowers Campus

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Intuitive Surgical

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Intuitive Surgical

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Intuitive Surgical

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Kathryn Kennedy Winery

Saratoga · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Lockheed Martin Space Systems Company

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Saratoga · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Mountain View · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Minaris Regenerative Medicine

Mountain View · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

MOMENTUM METAL FINISHING INC

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Moody Manufacturing Incorporated

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

NASA Ames Research Center

Moffett Field · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

National Instruments

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Northrop Grumman Systems Corporation

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Old Oak Vineyard Inc

Saratoga · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Pacific Coast Trane AC Services

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Penguin Computing

Fremont · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Rabbits Foot Meadery

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

ReadyRefresh Brisbane

Brisbane · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Rebar Spacer Block Co Inc

Alviso · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Right Away Redy Mix Inc

Union City · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

SAMAX PRECISION INC

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

San Carlos Airport

San Carlos · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

San Mateo Transit Dist So Base

San Carlos · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara Unified School District

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Shaw Industries Inc

Union City · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Shockwave Medical

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Shockwave Medical Inc

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Shockwave Medical Inc

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Sierra Circuits Inc

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Silk Road Medical

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

SMM Redwood City

Redwood City · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

South Bay Recycling LLC

San Carlos · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

SpeedPro San Francisco Peninsula

San Carlos · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Stevens Creek Quarry Sunnyvale

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale School District

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Thermo Fisher Scientific

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Trimble Navigation Limited

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Univar Solutions USA Inc

Redwood City · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

UPS Sunnyvale CASUN

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · Notice of Intent · 0.97 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Facility records are official Industrial General Permit registrations, but the association between a facility and this waterbody is derived geographically (proximity or shared HUC12 subwatershed) and is not a Water Board receiving-water determination. Where a permit carries a Water Board-stated TMDL requirement naming this water, it is listed separately above.