California Stormwater Intelligence

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Waterbody profile

Official Water Board record · 2026 cycle

San Tomas Aquino Creek (Santa Clara County)

Waterbody ID (WBID): CAR2055004020080624165713
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 (4)

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
AmmoniaNutrients	151012	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Benthic Community EffectsOther Cause	154159	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
ToxicityTotal Toxics	142736	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
TrashTrash	99866	Do Not Delist from 303(d) list (being addressed with action other than TMDL)	Original	5C — Addressed by action other than a TMDL	—	—

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: Sep 16, 2026, 10:56 PM UTC
Waterbody ID: CAR2055004020080624165713
CALWNUM: 2205.500400, 2205.500500
WBD code: 180500030306, 180500030401, 180500030402, 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: 33.07 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

derived_watershed_association

Derived by California Stormwater Intelligence

San Jose · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Agilent Technologies

Santa Clara · Notice of Intent · 0.67 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

Santa Clara · 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

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Amex Plating Inc

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · No Exposure Certification · 0.96 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Santa Clara · Notice of Intent

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 B21

Santa Clara · No Exposure Certification

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

Applied Materials Bowers Campus

Santa Clara · Notice of Intent · 0.60 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Applied Materials Scott Campus

Santa Clara · Notice of Intent · 0.59 km away

derived_nearby_in_watershed

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

Auto Chlor System

Santa Clara · Notice of Intent · 0.96 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Santa Clara · Notice of Intent

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

Bi Cmos Foundry

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Byington Steel Treating

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

C F Gagliasso Tr

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Campbell Union Sch Dis

Campbell · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

San Jose · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Central Concrete

San Jose · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Central Concrete Supply

San Jose · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Central Concrete Supply

San Jose · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Sunnyvale · Notice of Intent · 0.83 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Cirexx International

Santa Clara · Notice of Intent

derived_watershed_association

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

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

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara · Notice of Intent · 0.70 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Santa Clara · No Exposure Certification · 0.30 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Coterie Cellars Inc

San Jose · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Crystallume Corp

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

CSL Operating LLC

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Danny Recycling INC

Santa Clara · Notice of Intent · 0.92 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Darko Precision Inc

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Data Physics Corporation

Santa Clara · No Exposure Certification

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

Donald Von Raesfeld Power Plant

Santa Clara · Notice of Intent

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

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara · No Exposure Certification · 0.77 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara · Notice of Intent · 0.41 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Santa Clara · No Exposure Certification · 0.94 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

FedEx Express Corp COAA

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

FedEx Freight Santa Clara

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Four D Metal Finishing Inc

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara · Notice of Intent · 0.43 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Garage Winemaker LLC

Los Gatos · No Exposure Certification · 0.35 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Garden City Sanitation

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Saratoga · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

GreenMouse Incorporated

San Jose · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Greenwaste of Palo Alto

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Gridtential Energy Inc

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Hondas Only Auto Dismantler

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

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara · No Exposure Certification · 0.82 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Ingenium Group LLC

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Intel Corp Bowers Campus

Santa Clara · Notice of Intent · 0.79 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Santa Clara · Notice of Intent

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

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

J and B Enterprises

Santa Clara · Notice of Intent · 0.98 km away

derived_nearby_in_watershed

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

Keysight Technologies

Santa Clara · No Exposure Certification · 0.38 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Lockheed Martin Space Systems Company

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Lombardo Diamond Core Drilling

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

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Metal Finishing Solutions Incorporated

Santa Clara · Notice of Intent

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

Mineta San Jose International Airport

San Jose · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Mission Trail Waste Systems

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

MOMENTUM METAL FINISHING INC

Sunnyvale · Notice of Intent · 0.99 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Moody Manufacturing Incorporated

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Moreland School District

San Jose · Notice of Intent

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

Santa Clara · Notice of Intent

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 Ceramics Inc

Santa Clara · No Exposure Certification

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

Santa Clara · 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

Precision Specialties

San Jose · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Prime Now LLC USF1

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Prodigy Surface Tech Inc

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara · No Exposure Certification · 0.27 km away

derived_nearby_in_watershed

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

Roche Molecular Systems Inc

Santa Clara · No Exposure Certification · 0.82 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Royal Coach Tours

San Jose · 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

Santa Clara · No Exposure Certification · 0.17 km away

derived_receiving_water

Derived by California Stormwater Intelligence

San Carlos Airport

San Carlos · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

San Jose · 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 Asphalt Facility

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara City Gianera Power

Santa Clara · Notice of Intent · 0.13 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Santa Clara Plating Company Inc

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara Powder Coating Inc

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara Ready Mix

Santa Clara · 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

Shape Memory Medical Inc

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Shockwave Medical

Santa Clara · No Exposure Certification · 0.26 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Shockwave Medical Inc

Santa Clara · No Exposure Certification · 0.35 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Shockwave Medical Inc

Santa Clara · No Exposure Certification · 0.21 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Sierra Circuits Inc

Sunnyvale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

San Jose · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Silk Road Medical

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

SJ Valley Plating

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

SMM Redwood City

Redwood City · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara · 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

Specialty Solid Waste and Recycling

Santa Clara · Notice of Intent · 0.98 km away

derived_nearby_in_watershed

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

SUMMIT INTERCONNECT dba STREAMLINE CIRCUITS LLC

San Jose · 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

Swift Metal Finishing

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Swissport Fueling Inc

San Jose · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Thermo Fisher Scientific

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Thermo Fisher Scientific

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Thermo Fisher Scientific Thomas Road

Santa Clara · No Exposure Certification · 0.84 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

TM INDUSTRIES INC

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

TraPac Container Terminal Oakland

Oakland · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Trimble Navigation Limited

Sunnyvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

TTM Printed Circuit Group Inc

Santa Clara · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

United Marble and Granite Inc

Santa Clara · Notice of Intent · 0.59 km away

derived_nearby_in_watershed

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

Vanderbend Manufacturing Inc

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Verb Surgical Incorporate

Santa Clara · No Exposure Certification · 0.12 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Sunnyvale · Notice of Intent · 0.87 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Westfab Manufacturing Inc

Santa Clara · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Whizz Systems Incorporation

Santa Clara · No Exposure Certification · 0.19 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

WL Gore and Associates Silicon Valley

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

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.