Matadero Creek

2026 303(d) list Waterbody ID CAR2055004019990218130228 River & Stream Region 2 · San Francisco Bay

At a glance

2026 listing Evidence: State-published: On the 2026 303(d) list · 2 Appendix A decisions; Category 4a: addressed by a USEPA-approved TMDL; What a listing means
Pollutants and stressors: 2 pollutants in 2 Appendix A categories; Pesticides (1) · Trash (1); Listing decisions
TMDL information Evidence: State-published: 2 decisions with a TMDL requirement status; 1 name a TMDL project; Status codes as published: 5B, 5C; TMDL details
Regional Water Board: Region 2 · San Francisco Bay; River & Stream · Map
Industrial stormwater facilities: 12 report it as their receiving water Evidence: identification corroborated; 29 within 1 km Evidence: geographic proximity; Neither count establishes a discharge · Facilities

What a 303(d) listing means

The Clean Water Act section 303(d) list names waters that do not meet water quality standards for one or more pollutants or stressors. California publishes it in the Integrated Report; this page shows the 2026 decisions from Appendix A as published.

A listing describes the condition of the waterbody. It does not identify which sources cause the impairment, and it does not by itself place a requirement on any particular facility.
Listed waters do not all have the same status. The Integrated Report category says how an impairment is being addressed: 5, a TMDL is required; 4a, addressed by a USEPA-approved TMDL; 4b, addressed by other pollution control requirements; 4c, impairment not caused by a pollutant. This waterbody's decisions are in category 4a.
TMDL requirement status values (such as 5A or 5B) are shown exactly as published in Appendix A.

2026 listing status Evidence: State-published

On the 2026 303(d) list: Yes
Appendix A decisions: 2
Integrated Report category: 4a (addressed by a USEPA-approved TMDL)
Listing cycle: 2026
State Board adoption: 2026-02-03 (Resolution 2026-0005)
USEPA approval: not confirmed — submittal letter to USEPA published; no approval found on the report page (checked 2026-10-22)
Regional Water Board: 2 — San Francisco Bay

Published by the State Water Resources Control Board (2026 California Integrated Report, Appendix A). Listing status is taken from Appendix A only. A listing describes the condition of this waterbody, not of any facility.

Location

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Open this area on the statewide map · Browse impaired waters

Listing decisions and pollutants Evidence: State-published

Grouped by the Pollutant Category published in Appendix A. Pollutant names, categories and decisions are exactly as published.

Pesticides (1 decision)

Pesticides: Appendix A decisions
Pollutant	Pollutant category	Category	Final listing decision	Decision status	Sources	Decision ID
Diazinon	Pesticides	4a	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Original	Urban Runoff/Storm Sewers	69764

Trash (1 decision)

Trash: Appendix A decisions
Pollutant	Pollutant category	Category	Final listing decision	Decision status	Sources	Decision ID
Trash	Trash	4a	Do Not Delist from 303(d) list (being addressed with action other than TMDL)	Original	A Source Unknown	89122

TMDL information Evidence: State-published

TMDL information published for this waterbody
Pollutant	TMDL requirement status	TMDL project	Priority	USEPA approval of TMDL	Expected attainment
Diazinon	5B	San Francisco Bay Urban Creeks Diazinon	—	2007-05-16	—
Trash	5C	—	—	—	2029

This is TMDL information for the waterbody. It does not establish that a TMDL applies to any particular facility. Facility-specific TMDL requirements recorded in SMARTS appear on facility pages and are not linked to this waterbody until reviewed.

HUC12 watersheds

Published with the listing Evidence: publisher-reported

Adobe Creek-Frontal San Francisco Bay Estuaries 180500030407
San Francisco Bay Estuaries-Frontal San Francisco Bay 180500041001

Overlapping the waterbody's shape Evidence: spatial

Adobe Creek-Frontal San Francisco Bay Estuaries 180500030407 also published
San Francisco Bay Estuaries-Frontal San Francisco Bay 180500041001 also published

Industrial stormwater facilities

Evidence: identification corroborated

Shows: the facility named this waterbody as its receiving water in SMARTS, and the name and the facility's location are consistent with it. Does not establish: a discharge pathway, a discharge of any pollutant, or a cause of the listing.

Evidence: geographic proximity

Shows: the facility's reported location is within 1 km of the waterbody's mapped shape. Does not establish: that the facility discharges to this waterbody, or any other relationship.

Report this waterbody as their receiving water Evidence: identification corroborated

Facilities whose reported receiving water is identified as this waterbody
Facility	WDID	Status	Distance from reported location	Map
Watkins Johnson Co	2 43I006882	Terminated	17 m	map
Coherent Inc	2 43I005587	Terminated	174 m	map
Microwave Power Products Inc	2 43I030869	Active	207 m	map
Communications Power Industr	2 43I012031	Terminated	281 m	map
Varian Medical Systems	2 43I026326	Active	308 m	map
Varian Medical Systems	2 43I006791	Terminated	356 m	map
Hewlett Packard Co	2 43I014610	Terminated	448 m	map
Danisco US Inc IFF	2 43I012289	Active	686 m	map
Varian Nmr Instruments	2 43I015026	Terminated	688 m	map
Alza Corp	2 43I006698	Terminated	901 m	map
Alza Corp	2 43I006699	Terminated	1.0 km	map
Alza Corp	2 43I016579	Terminated	1.3 km	map

Receiving water reported by facility — waterbody identification corroborated by geographic evidence. 12 facilities.

Within 1 km of a facility's reported location Evidence: geographic proximity

Spatial proximity only; discharge pathway not established. Being near this waterbody does not mean a facility discharges to it.

Facilities whose reported location is within 1 km of this waterbody
Facility	WDID	Status	Distance	Map
Watkins Johnson Co	2 43I006882	Terminated	17 m	map
Coherent Inc	2 43I005587	Terminated	174 m	map
Microwave Power Products Inc	2 43I030869	Active	207 m	map
Communications Power Industr	2 43I012031	Terminated	281 m	map
Teledyne Mec	2 43I006735	Terminated	281 m	map
Syntex Usa Inc	2 43I006602	Terminated	291 m	map
Oread Inc	2 43I012917	Terminated	291 m	map
PARC Palo Alto Research Center	2 43I005357	Terminated	293 m	map
Space Systems Loral LLC	2 43I026197	Terminated	298 m	map
Varian Medical Systems	2 43I026326	Active	308 m	map
Varian Medical Systems	2 43I006791	Terminated	356 m	map
Lockheed Martin Missiles & Space	2 43I006606	Terminated	361 m	map
Novellus Systems Inc	2 43I013259	Terminated	436 m	map
Palo Alto Fabrication	2 43I006568	Terminated	448 m	map
Hewlett Packard Co	2 43I014610	Terminated	448 m	map
Dpix	2 43I012536	Terminated	509 m	map
Dpix LLC	2 43I015232	Terminated	509 m	map
HP Inc	2 43NEC001977	Active	595 m	map
HP Inc	2 43NEC007978	Terminated	595 m	map
Danisco US Inc IFF	2 43I012289	Active	686 m	map
Varian Nmr Instruments	2 43I015026	Terminated	688 m	map
Hewlett Packard	2 43I006001	Terminated	793 m	map
Hewlett Packard	2 43I005999	Terminated	835 m	map
Agilent Laboratories	2 43I015462	Terminated	835 m	map
Beckman Instruments	2 43I006626	Terminated	846 m	map
Alza Corp	2 43I006698	Terminated	901 m	map
Eo Sensors Inc	2 43I006823	Terminated	955 m	map
Litton Systs Inc Elect Dev Div	2 43I011598	Terminated	955 m	map
OneD Material, LLC	2 43NEC003311	Active	996 m	map

29 facilities, nearest first.

Sources and provenance

Sources behind this page
Information	Source	Retrieved
Watershed Boundary Dataset HU2 GeoPackages 15, 16, 18 (WBDHU12)	USGS	2026-10-22
2026 California Integrated Report, Appendix A: 2026 303(d) List (final)	SWRCB	2026-10-22
Final_2026_Rivers_and_Streams + Final_2026_Lakes_and_Reservoirs (FeatureServer 0)	SWRCB GIS	2026-10-22
SMARTS TMDL requirements	SMARTS	2026-10-21

Relationships computed 2026-10-22 (facility_huc12/1, proximity/1, receiving_water/2, tmdl_reference/1, waterbody_huc12_ovl/1, waterbody_huc12_pub/1).

Integrated Report categories: 5, a TMDL is required; 4a, addressed by a USEPA-approved TMDL; 4b, addressed by other pollution control requirements; 4c, impairment not caused by a pollutant.