Castaic Creek Reach 1 (confluence of Santa Clara River to Castaic Lagoon)
Not in 2026 Appendix A Waterbody ID CAR4035100020110406144154 River & Stream Region 4 · Los Angeles
At a glance
- Pollutants and stressors
- No Appendix A decisions
- Industrial stormwater facilities
- 0 report it as their receiving water Evidence: identification corroborated
- 47 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.
- 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
- No (2026 geometry only)
- Appendix A decisions
- 0
- Integrated Report category
- —
- Listing cycle
- 2026
- 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
No Appendix A decisions for this waterbody.
TMDL information Evidence: State-published
Appendix A records no TMDL requirement status for this waterbody.
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
None published.
Overlapping the waterbody's shape Evidence: spatial
- Lower Castaic Creek 180701020306
- Salt Canyon-Santa Clara River 180701020403
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
No facility's reported receiving water is identified as this waterbody.
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 |
|---|---|---|---|---|
| Curtiss Wright Controls | 4 19NEC012990 | Active | 36 m | map |
| NasmythTNF | 4 19NEC004089 | Terminated | 252 m | map |
| Talladium Incorporated | 4 19I029313 | Terminated | 260 m | map |
| Murco Wall Prod Inc | 4 19I011819 | Terminated | 315 m | map |
| Murphy Wall Products International | 4 19I021303 | Active | 315 m | map |
| Castaic Boat & Marine LLC | 4 19I018911 | Terminated | 315 m | map |
| Anterra Services Inc. | 4 19IN604487 | Undetermined | 321 m | map |
| Jose Roberto Hernandez | 4 19I018910 | Terminated | 341 m | map |
| Del West | 4 19NEC003250 | Active | 342 m | map |
| Del West USA | 4 19IN603518 | No Action Required | 342 m | map |
| Wayside Honor Rancho | 4 19I028763 | Active | 343 m | map |
| Bloomers Metal Stamping Inc | 4 19I024534 | Terminated | 358 m | map |
| Bloomers Metal Stamping Inc | 4 19NEC000034 | Active | 358 m | map |
| TA Aerospace | 4 19I021938 | Active | 374 m | map |
| Lakeside Boats Inc | 4 19IN601616 | No Action Required | 375 m | map |
| Lakeside Boats Inc | 4 19I023705 | Active | 388 m | map |
| Lakeside Boat Service Inc | 4 19I018998 | Terminated | 393 m | map |
| Lamsco West | 4 19NEC001259 | Active | 399 m | map |
| Santee | 4 19I020303 | Terminated | 417 m | map |
| Sunvair Inc | 4 19I026352 | Active | 429 m | map |
| USPS Santa Clarita VMF | 4 19I012059 | Terminated | 437 m | map |
| USPS Santa Clarita VMF | 4 19NEC000589 | Active | 437 m | map |
| Castaic Sch Dist | 4 19I000964 | Terminated | 443 m | map |
| DA PRO Rubber Inc | 4 19IN604483 | Undetermined | 454 m | map |
| Robertos Boat Repair | 4 19IN601859 | No Action Required | 456 m | map |
| Robertos Boat Repair | 4 19I023627 | Active | 467 m | map |
| Vic Flota Upholostry | 4 19I018916 | Terminated | 544 m | map |
| Regent Aerospace Corp. | 4 19IN604461 | No Action Required | 550 m | map |
| Als Upholstery & Boat Repair | 4 19IN601860 | No Action Required | 552 m | map |
| Triumph Actuation Systems | 4 19I024852 | Active | 554 m | map |
| L3 TECHNOLOGIES INC | 4 19NEC011842 | Terminated | 555 m | map |
| Tapia Oilfield | 4 19I028325 | Active | 564 m | map |
| REGENT AEROSPACE CORPORATION | 4 19NEC004854 | Active | 591 m | map |
| J Paul Getty Trust | 4 19IN607600 | No Action Required | 673 m | map |
| SALONCENTRIC | 4 19NEC001676 | Terminated | 695 m | map |
| OHL USA | 4 19I030115 | Active | 700 m | map |
| Del West Engineering | 4 19NEC004221 | Active | 710 m | map |
| Del West Engineering | 4 19IN603983 | No Action Required | 712 m | map |
| 31642 Castaic Rd | 4 19I013992 | Terminated | 754 m | map |
| Honor Ranch | 4 19I020993 | Terminated | 814 m | map |
| Chiquita Canyon Landfill Inc | 4 19I013363 | Terminated | 843 m | map |
| Republic Services Chiquita Can | 4 19I015206 | Terminated | 843 m | map |
| Tapia Oilfield | 4 19I025757 | Terminated | 863 m | map |
| ITT Aerospace Controls | 4 19I014586 | Active | 978 m | map |
| Hydro Systems Inc | 4 19I024734 | Active | 996 m | map |
| Hydro Sytem Inc | 4 19IN602568 | NOI Filed | 996 m | map |
| Remo | 4 19I018668 | Active | 997 m | map |
47 facilities, nearest first.
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.