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
- TMDL information Evidence: State-published
- 1 decision with a TMDL requirement status
- Status codes as published: 5A
- TMDL details
- 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)
| 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
| 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
| 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.
| Facility | WDID | Status | Distance | Map |
|---|---|---|---|---|
| Seimens Energy & Autoamtion | 4 19I007195 | Terminated | 388 m | map |
| Royal Cabinets | 4 19I017814 | Active | 392 m | map |
| Viant Upland Inc | 8 36NEC015372 | Active | 396 m | map |
| Roll Master Corp | 4 19IN602061 | No Action Required | 396 m | map |
| Regal Cultured Marble | 4 19I020748 | Terminated | 396 m | map |
| Western Belting Innovations Inc | 4 19NEC015258 | Active | 403 m | map |
| City Concrete Prod | 4 19I003724 | Terminated | 410 m | map |
| Conveyor Manufacturing & Service | 4 19NEC014288 | Active | 419 m | map |
| Montgomery, Weston E | 8 36I009188 | Terminated | 421 m | map |
| JJT Logistics Inc | 4 19NEC015311 | Active | 426 m | map |
| GM Precision Machinery Inc | 4 19NEC015178 | Active | 428 m | map |
| Protection 1 Fence | 8 36NEC003255 | Terminated | 430 m | map |
| B&D Precision | 4 19NEC015293 | Active | 435 m | map |
| Master Recycling Center Inc | 4 19I027228 | Terminated | 435 m | map |
| Dineen Trucking Inc | 8 36I018208 | Terminated | 436 m | map |
| AC Folding Gates Inc | 4 19NEC007300 | Active | 438 m | map |
| Gregorys Pallet Inc | 4 19NEC015924 | Active | 442 m | map |
| Analytik Jena US LLC | 8 36I021232 | Terminated | 455 m | map |
| Wmi Services Pomona | 4 19I002803 | Terminated | 457 m | map |
| Stueves Milk Transport Inc | 4 19I020976 | Terminated | 457 m | map |
| AB Transfer Storage and Leasing | 4 19I016416 | Terminated | 459 m | map |
| Harris Rebar Southern California | 4 19I022699 | Terminated | 465 m | map |
| Duran Environmental Inc | 4 19I005438 | Terminated | 465 m | map |
| Marge Carson Inc | 4 19I023561 | Terminated | 467 m | map |
| Marge Carson Inc | 4 19NEC000065 | Terminated | 467 m | map |
| Protection 1 Fence | 8 36IN603694 | No Action Required | 473 m | map |
| FDS Manufacturing C | 4 19I022928 | Active | 473 m | map |
| Nucor Skyline | 4 19I028286 | Terminated | 479 m | map |
| Accellent | 8 36I021176 | Terminated | 482 m | map |
| ROLLER TECHNOLOGIES INC | 8 36NEC009495 | Active | 482 m | map |
| Pixon Sign Inc | 4 19I030369 | Active | 484 m | map |
| Stanley Black & Decker | 8 36NEC016221 | Active | 487 m | map |
| CCL Label | 8 36NEC007116 | Active | 490 m | map |
| Master Recycling Center | 4 19I020047 | Terminated | 496 m | map |
| Johnston Sweeper Co | 4 19I009312 | Terminated | 500 m | map |
| Durham School Services | 4 19I028735 | Terminated | 502 m | map |
| Durham School Services | 4 19NEC015591 | Active | 502 m | map |
| JK Molds Inc | 8 36I021267 | Terminated | 502 m | map |
| REDSTONE COMPUTER INC | 4 19NEC006202 | Terminated | 503 m | map |
| Triangle Furniture | 4 19I019765 | Terminated | 504 m | map |
| ryan shutter window | 4 19NEC015474 | Active | 516 m | map |
| FM DRAWERS | 8 36NEC004265 | Active | 521 m | map |
| Solryza | 8 36NEC005000 | Terminated | 522 m | map |
| General Cable Corp | 4 19I001307 | Terminated | 522 m | map |
| CLS Landscape Management Inc | 8 36IN602329 | Undetermined | 523 m | map |
| Claremont - Mills Ave (Site 6725) | 4 19NNA003165 | No Action Required | 525 m | map |
| Triple Five Auto Wrecking | 8 36I010626 | Terminated | 531 m | map |
| Global Auto Dismantling | 8 36I022786 | Terminated | 531 m | map |
| AA Imports Auto Wrecking Inc | 8 36I029355 | Active | 544 m | map |
| Lippert Components Plt 98 | 4 19I027743 | Terminated | 555 m | map |
Sources and provenance
| 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.