San Lorenzo Creek

2026 303(d) list Waterbody ID CAR2042002319990218140753 River & Stream Region 2 · San Francisco Bay

At a glance

2026 listing Evidence: State-published: On the 2026 303(d) list · 1 Appendix A decision; Category 4a: addressed by a USEPA-approved TMDL; What a listing means
Pollutants and stressors: 1 pollutant in 1 Appendix A category; Pesticides (1); Listing decisions
TMDL information Evidence: State-published: 1 decision with a TMDL requirement status; 1 name a TMDL project; Status codes as published: 5B; TMDL details
Regional Water Board: Region 2 · San Francisco Bay; River & Stream · Map
Industrial stormwater facilities: 3 report it as their receiving water Evidence: identification corroborated; 27 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: 1
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

Loading the waterbody shape…

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	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	A Source Unknown	70591

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	—

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

San Lorenzo Creek 180500040802
Ward Creek-Frontal San Francisco Bay Estuaries 180500040804
San Francisco Bay Estuaries-Frontal San Francisco Bay 180500041001

Overlapping the waterbody's shape Evidence: spatial

Crow Creek 180500040801
San Lorenzo Creek 180500040802 also published
Sausal Creek-Frontal San Francisco Bay Estuaries 180500040805
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
Conway Freight Lines Inc	2 01I013474	Terminated	162 m	map
Vision Recycling	2 01I030114	Active	558 m	map
Seaside Maintenance Shop And RV	2 01I024014	Terminated	952 m	map

Receiving water reported by facility — waterbody identification corroborated by geographic evidence. 3 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
Conway Freight Lines Inc	2 01I013474	Terminated	162 m	map
Halus Power Systems	2 01NEC012532	Active	184 m	map
Grant Avenue Storage	2 01NNA002506	No Action Required	184 m	map
United Environmental Corporation	2 01I031754	Active	281 m	map
Cycle Salvage	2 01NEC004987	Terminated	283 m	map
Oakland Pallet Co Inc	2 01I020068	Active	355 m	map
PCA	2 01I006349	Terminated	366 m	map
Sma Equipment Co Inc	2 01I015154	Terminated	366 m	map
Oro Loma Castro Valley Wwtp	2 01I002918	Terminated	366 m	map
Doing It Moving Trucking LLC	2 01NNA001959	No Action Required	367 m	map
San Lorenzo Unified School District	2 01I005615	Active	431 m	map
238 and 580	2 01I027368	Terminated	518 m	map
Di Salvo Trucking	2 01I004821	Terminated	537 m	map
Vision Recycling	2 01I030114	Active	558 m	map
R&L Carriers OAK	2 01I023833	Active	574 m	map
Duncan David D	2 01NNA000501	No Action Required	632 m	map
Tyson Foods San Lorenzo	2 01I025556	Active	663 m	map
Nanis Treats	2 01NEC015527	Active	665 m	map
Pac Rolling Door Co	2 01I013867	Terminated	712 m	map
Hillshire Brands Sara Lee	2 01I005931	Terminated	713 m	map
Derricks Trucking inc	2 01NNA001704	No Action Required	760 m	map
Santini Foods INC	2 01I024065	Active	814 m	map
Archer Brothers	2 01I017287	Terminated	827 m	map
Golden West Paper Information	2 01I020137	Terminated	933 m	map
Seaside Refrigerated Trans	2 01I009332	Terminated	946 m	map
Seaside Maintenance Shop And RV	2 01I024014	Terminated	952 m	map
Trac Intermodal	2 01I027253	Active	974 m	map

27 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.