San Antonio Creek

2026 303(d) list Waterbody ID CAR8012100019991013144655 River & Stream Region 8 · Santa Ana

At a glance

2026 listing Evidence: State-published: On the 2026 303(d) list · 1 Appendix A decision; Category 5: a TMDL is required; What a listing means
Pollutants and stressors: 1 pollutant in 1 Appendix A category; Other Cause (1); Listing decisions
TMDL information Evidence: State-published: 1 decision with a TMDL requirement status; Status codes as published: 5A; TMDL details
Regional Water Board: Region 8 · Santa Ana; River & Stream · Map
Industrial stormwater facilities: 9 report it as their receiving water Evidence: identification corroborated; 285 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: 1
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: 8 — Santa Ana

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.

Other Cause (1 decision)

Other Cause: Appendix A decisions
Pollutant	Pollutant category	Category	Final listing decision	Decision status	Sources	Decision ID
pH	Other Cause	5	Do Not Delist from 303(d) list (TMDL required list)	Revised	A Source Unknown	150263

TMDL information Evidence: State-published

TMDL information published for this waterbody
Pollutant	TMDL requirement status	TMDL project	Priority	USEPA approval of TMDL	Expected attainment
pH	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

San Antonio Canyon 180702030701
Upper Chino Creek 180702030702

Overlapping the waterbody's shape Evidence: spatial

San Antonio Canyon 180702030701 also published
Upper Chino Creek 180702030702 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
Omnitrans West Valley	8 36I000550	Active	28 m	map
Jack Jones Trucking Inc	8 36I002126	Terminated	61 m	map
Mountain Valley Express Co Inc	8 36I020090	Terminated	61 m	map
STEELCO USA	8 36I027222	Terminated	83 m	map
Japanese Unique Auto Parts	8 36I022999	Active	100 m	map
Ecology Control Industries	8 36I020021	Terminated	171 m	map
Owens Brockway	8 36I002958	Terminated	247 m	map
Analytik Jena US LLC	8 36I021232	Terminated	455 m	map
Lee Jennings Target Express Chino	8 36I025926	Active	1.1 km	map

Receiving water reported by facility — waterbody identification corroborated by geographic evidence. 9 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
Floracraft Corp	4 19I018397	Terminated	794 m	map
Technical Anodize LLC	4 19NEC001768	Terminated	801 m	map
Burrtec Pomona Yard	4 19I018800	Active	815 m	map
A Auto Wrecking	4 19I011551	Terminated	816 m	map
Slh Auto Sales & Wrecking	4 19I017461	Terminated	816 m	map
GTM International, Inc.	4 19IN600049	Undetermined	816 m	map
FMR Recycling	4 19IN600050	Undetermined	816 m	map
Duracell	8 36NEC001747	Terminated	830 m	map
California Plastix	4 19I023863	Active	841 m	map
California Plastix	4 19IN602117	NOI Filed	841 m	map
CubeSmart 4944	4 19NNA003255	No Action Required	842 m	map
Sierra Pacific Plastic Inc	4 19I020891	Terminated	843 m	map
Custodi Manufacturing	4 19NEC013642	Active	848 m	map
U Haul Pomona Assembly	4 19I029043	Active	852 m	map
Baja Furniture	8 36IN605886	NEC Required	854 m	map
Socal Renew Inc FMR Recycling	4 19I018887	Terminated	869 m	map
Anheuser Busch	8 36NEC004840	Active	897 m	map
Biagi Bros	8 36NEC016172	Active	897 m	map
Tri Alloy Group LLC	8 36I015221	Terminated	901 m	map
Cores Arreaga	4 19I028302	Terminated	906 m	map
Zefferys Cabinets	8 36IN608094	No Action Required	940 m	map
Prestige Home Furnishing	8 36IN601739	No Action Required	941 m	map
MKC Printing Company	8 36NEC004506	Active	943 m	map
ZEFFERYS CABINETS INC	8 36NEC014388	Active	943 m	map
Rohr Steel Inc	4 19I028961	Active	955 m	map
Upland	8 36I014813	Terminated	960 m	map
Robertsons Upland Plant	8 36I020549	Terminated	960 m	map
Interstate Brands Corp	4 19I003279	Terminated	960 m	map
Interstate Brands Corp	4 19I012405	Terminated	960 m	map
ES Precision Deburring	8 36NEC010816	Active	966 m	map
CALIFORNIA POLISH	8 36NEC004313	Terminated	972 m	map
Rs Aircraft precision deburring	8 36NEC004420	Terminated	972 m	map
Pomona Precision Grinding Inc	4 19NEC015248	Active	976 m	map
Phils Custom Cabinets	4 19NEC012482	Terminated	979 m	map
Bert & Rockys Cream Company	8 36NEC014404	Active	982 m	map

285 facilities, nearest first. Page 6 of 6: previous

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.