Sawpit Creek

2026 303(d) list Waterbody ID CAR4053100020050119104537 River & Stream Region 4 · Los Angeles

At a glance

2026 listing Evidence: State-published: On the 2026 303(d) list · 4 Appendix A decisions; Category 5: a TMDL is required; What a listing means
Pollutants and stressors: 4 pollutants in 4 Appendix A categories; Metals (1) · Pathogens (1) · Pesticides (1) · Toxic Organics (1); Listing decisions
TMDL information Evidence: State-published: 4 decisions with a TMDL requirement status; 1 name a TMDL project; Status codes as published: 5A, 5B; TMDL details
Regional Water Board: Region 4 · Los Angeles; River & Stream · Map
Industrial stormwater facilities: 7 report it as their receiving water Evidence: identification corroborated; 177 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 5.
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: 4
Integrated Report category: 5 (a TMDL is required)
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: 4 — Los Angeles

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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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.

Metals (1 decision)

Metals: Appendix A decisions
Pollutant	Pollutant category	Category	Final listing decision	Decision status	Sources	Decision ID
Lead	Metals	5	List on 303(d) list (TMDL required list)	Revised	A Source Unknown	138802

Pathogens (1 decision)

Pathogens: Appendix A decisions
Pollutant	Pollutant category	Category	Final listing decision	Decision status	Sources	Decision ID
Indicator Bacteria	Pathogens	5	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	A Source Unknown	150333

Pesticides (1 decision)

Pesticides: Appendix A decisions
Pollutant	Pollutant category	Category	Final listing decision	Decision status	Sources	Decision ID
Chlordane	Pesticides	5	List on 303(d) list (TMDL required list)	Revised	A Source Unknown	138798

Toxic Organics (1 decision)

Toxic Organics: Appendix A decisions
Pollutant	Pollutant category	Category	Final listing decision	Decision status	Sources	Decision ID
Bis(2ethylhexyl)phthalate (DEHP)	Toxic Organics	5	List on 303(d) list (TMDL required list)	Original	A Source Unknown	68164

TMDL information Evidence: State-published

TMDL information published for this waterbody
Pollutant	TMDL requirement status	TMDL project	Priority	USEPA approval of TMDL	Expected attainment
Bis(2ethylhexyl)phthalate (DEHP)	5A	—	Low	—	—
Chlordane	5A	—	Low	—	—
Indicator Bacteria	5B	Los Angeles River Pathogens (15)	—	2012-10-23	—
Lead	5A	—	Low	—	—

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

Santa Anita Wash-Rio Hondo 180701050302

Overlapping the waterbody's shape Evidence: spatial

Santa Anita Wash-Rio Hondo 180701050302 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
LA County Auto Parts & Salvage	4 19I028136	Terminated	389 m	map
JY AUTO PARTS INC	4 19I030968	Active	433 m	map
Alpha Auto Wrecking	4 19I012811	Terminated	572 m	map
Kin Ming Co USA	4 19I029458	Terminated	643 m	map
S & V Auto Dismantling	4 19I021942	Terminated	808 m	map
Burnett and Son Meat Company Incorporated	4 19I027661	Active	1.1 km	map
United Rock Products	4 19I000779	Active	1.5 km	map

Receiving water reported by facility — waterbody identification corroborated by geographic evidence. 7 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
Wm H Shatto Inc	4 19I006954	Terminated	8 m	map
MIRACLEWORKS INC	4 19NEC010085	Active	34 m	map
Dry Dock Storage	4 19NEC014065	Active	45 m	map
Pinnacle Disposal Services Inc	4 19NNA000867	No Action Required	48 m	map
All Right Auto Wrecking Inc	4 19I017273	Terminated	51 m	map
John Chadwick Corporation	4 19NEC007251	Active	52 m	map
R5 Recycling Inc	4 19NEC007638	Terminated	61 m	map
Art in Fine Forms	4 19NEC008508	Terminated	61 m	map
Mulgrew Aircraft Components Inc	4 19I029201	Active	68 m	map
Johns Auto Wrecking	4 19I014376	Terminated	71 m	map
F & M Auto Wrecking	4 19I015833	Terminated	71 m	map
Twin Turbo Auto Dismantling	4 19I028114	Terminated	84 m	map
T Truck Dismantling	4 19I023841	Terminated	94 m	map
Luxury Land Auto Wrecking Inc	4 19I024477	Terminated	94 m	map
First Transit Inc 55593	4 19I023809	Terminated	105 m	map
The Paper Mill Printers Fame Printing	4 19NEC008984	Active	107 m	map
Burke Rubber Co Purosil Div	4 19I004541	Terminated	107 m	map
Burke Rubber Co	4 19I010927	Terminated	107 m	map
Spragues Ready Mix	4 19I002348	Active	108 m	map
Composite Structures	4 19I000042	Terminated	117 m	map
Composite Structures LLC	4 19I013204	Terminated	117 m	map
Ducommun AeroStructures Inc	4 19I019056	Terminated	117 m	map
Coherent Inc	4 19NEC008580	Terminated	134 m	map
Coherent Inc	4 19NEC012164	Active	134 m	map
Tonys Truck Wrecking	4 19I010176	Terminated	141 m	map
GEM City Auto Parts Dismantl	4 19I021864	Active	141 m	map
Associated Asphalt	4 19I014472	Terminated	142 m	map
Holliday Trucking Co Inc 14	4 19I019481	Active	142 m	map
C B Mold & Engineering Inc	4 19IN602032	No Action Required	153 m	map
3M Company	4 19I002054	Active	158 m	map
Posey Products LLC	4 19NEC003423	Terminated	180 m	map
LKQ Pick A Part	4 19I010791	Terminated	184 m	map
Pick a Part Auto Dismantling	4 19I031638	Active	184 m	map
Foothill Transit	4 19I018599	Terminated	193 m	map
MV Transit Division 125	4 19I021881	Terminated	193 m	map
Foothill Transit	4 19I025105	Active	218 m	map
Landmark Materials Inc	4 19I010774	Terminated	233 m	map
Decor Concepts	4 19I003189	Terminated	234 m	map
CB NICHOLS EGG RNCH	4 19I017493	Terminated	234 m	map
H & S Enterprises Incorporated	4 19NEC006457	Active	254 m	map
Eksakt Works Inc	4 19NEC014089	Active	263 m	map
Solventum Orthodontics Corporation	4 19I001198	Active	264 m	map
Jim Cass Construction Incorporated	4 19NEC009824	Active	302 m	map
Neovia Logistics	4 19IN602669	No Action Required	340 m	map
Auto Parts Export Inc	4 19I030192	Active	341 m	map
TRIPLE 7 AUTO DISMANTLING INC	4 19I026148	Active	342 m	map
My Auto Wrecking	4 19I022420	Active	357 m	map
TAT Auto Dismantlers Inc	4 19I030669	Active	359 m	map
Ironman Trucks and Auto Dismantlers	4 19I025039	Terminated	361 m	map
My Boys Auto	4 19I024029	Terminated	363 m	map

177 facilities, nearest first. Page 1 of 4: next

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.