Dominguez Channel (lined portion above Vermont Ave)
2026 303(d) list Waterbody ID CAR4051200019980918161017 River & Stream Region 4 · Los Angeles
At a glance
- 2026 listing Evidence: State-published
- On the 2026 303(d) list · 6 Appendix A decisions
- Category 5: a TMDL is required
- What a listing means
- Pollutants and stressors
- 6 pollutants in 3 Appendix A categories
- Metals (4) · Pathogens (1) · Total Toxics (1)
- Listing decisions
- TMDL information Evidence: State-published
- 6 decisions with a TMDL requirement status; 4 name a TMDL project
- Status codes as published: 5A, 5B
- TMDL details
- Industrial stormwater facilities
- 3 report it as their receiving water Evidence: identification corroborated
- 154 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
- 6
- 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
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.
Metals (4 decisions)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Aluminum | Metals | 5 | List on 303(d) list (TMDL required list) | Revised | A Source Unknown | 153898 |
| Copper | Metals | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Original | A Source Unknown | 72474 |
| Lead | Metals | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Original | A Source Unknown | 98867 |
| Zinc | Metals | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Original | A Source Unknown | 68450 |
Pathogens (1 decision)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Indicator Bacteria | Pathogens | 5 | Do Not Delist from 303(d) list (TMDL required list) | Original | A Source Unknown | 68243 |
Total Toxics (1 decision)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Toxicity | Total Toxics | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Original | A Source Unknown | 76424 |
TMDL information Evidence: State-published
| Pollutant | TMDL requirement status | TMDL project | Priority | USEPA approval of TMDL | Expected attainment |
|---|---|---|---|---|---|
| Aluminum | 5A | — | Low | — | — |
| Copper | 5B | Dominguez, LA/LB Harbors, San Pedro Bay Metals (75 & 78), toxics(73a) and PAHs (74) | — | 2012-03-23 | — |
| Indicator Bacteria | 5A | — | High | — | — |
| Lead | 5B | Dominguez, LA/LB Harbors, San Pedro Bay Metals (75 & 78), toxics(73a) and PAHs (74) | — | 2012-03-23 | — |
| Toxicity | 5B | Dominguez, LA/LB Harbors, San Pedro Bay Metals (75 & 78), toxics(73a) and PAHs (74) | — | 2012-03-23 | — |
| Zinc | 5B | Dominguez, LA/LB Harbors, San Pedro Bay Metals (75 & 78), toxics(73a) and PAHs (74) | — | 2012-03-23 | — |
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
- Upper Dominguez Channel 180701060101
- Lower Dominguez Channel 180701060102
Overlapping the waterbody's shape Evidence: spatial
- Upper Dominguez Channel 180701060101 also published
- Lower Dominguez Channel 180701060102 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 |
|---|---|---|---|---|
| Ramonas Food Group LLC | 4 19I026449 | Active | 1.5 km | map |
| MacSmith Corporation | 4 19I029072 | Active | 2.0 km | map |
| Hylands Consumer Health Inc | 4 19I027115 | Active | 4.7 km | 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.
| Facility | WDID | Status | Distance | Map |
|---|---|---|---|---|
| D & R Engineering | 4 19NEC010861 | Active | 7 m | map |
| Lithographix Inc | 4 19I025588 | Active | 19 m | map |
| Control Plating Co Inc | 4 19I001689 | Terminated | 22 m | map |
| Blue Forge Metals LLC | 4 19NEC016367 | Active | 29 m | map |
| Vergola USA Inc | 4 19NEC016164 | Active | 30 m | map |
| US Packagers Inc | 4 19NEC008511 | Active | 30 m | map |
| Ramda Metal Specialties Inc | 4 19NEC001574 | Active | 34 m | map |
| Ramda Metal Specialties Inc | 4 19NEC002601 | Terminated | 34 m | map |
| Radex Stereo Co A Corp | 4 19NEC005395 | Active | 35 m | map |
| Tech Etch Merel Inc | 4 19I000291 | Terminated | 54 m | map |
| Rebuilt Master | 4 19I012829 | Terminated | 60 m | map |
| Automatic Welding Incorporated | 4 19NEC015571 | Active | 61 m | map |
| Northrop Aircraft Div Af Facil | 4 19I006356 | Terminated | 68 m | map |
| Hawthorne Municipal Airport | 4 19I002294 | Active | 69 m | map |
| Decopress | 4 19NEC008234 | Active | 74 m | map |
| SpaceX Tooling Facility | 4 19I024995 | Active | 80 m | map |
| Amazon.com.goldenstatefc,LLC-DLA8 | 4 19NEC002920 | Terminated | 90 m | map |
| Amazon com Services LLC DLA8 | 4 19I027587 | Terminated | 91 m | map |
| Spheres Inc Zero Point Energy Labs | 4 19NEC015613 | Active | 107 m | map |
| McCormick - AMR Gardena 12 | 4 19NNA003104 | No Action Required | 117 m | map |
| McCormick - AMR Gardena 12 | 4 19NNA003120 | No Action Required | 117 m | map |
| Star Marketing International dba Apollo Group | 4 19NEC007385 | Active | 122 m | map |
| Space Exploration Technologies | 4 19I023543 | Active | 128 m | map |
| Authentic Foods | 4 19NEC001438 | Active | 128 m | map |
| Gramercy Aerospace | 4 19I031301 | Active | 130 m | map |
| Gramercy Aerospace | 4 19NEC008442 | Terminated | 130 m | map |
| RALPH D MEST & SON | 4 19NEC009260 | Active | 134 m | map |
| Marleon Inc DBA Hanleys Welding | 4 19I029987 | Active | 135 m | map |
| Gamma Aerospace LLC | 4 19NEC005679 | Terminated | 138 m | map |
| AMR Hawthorne | 4 19I028220 | Active | 140 m | map |
| Blue Chip Moving and Storage Inc | 4 19NNA003110 | NOI Required | 141 m | map |
| DASH Systems | 4 19NEC009914 | Terminated | 142 m | map |
| U Pick U Save | 4 19I002372 | Terminated | 142 m | map |
| DASH Systems | 4 19NNA001793 | No Action Required | 144 m | map |
| NSFW World Communications | 4 19NEC015669 | Active | 144 m | map |
| Indarg Engineering Inc | 4 19NEC006147 | Active | 159 m | map |
| Luseaux Laboratories | 4 19I009109 | Terminated | 166 m | map |
| Brek Manufacturing | 4 19NEC002818 | Active | 171 m | map |
| Matsui International | 4 19NEC000109 | Active | 185 m | map |
| California Rice Center Inc | 4 19NEC006813 | Active | 186 m | map |
| Amazon com Services LLC DLA8 P1 | 4 19NEC012644 | Terminated | 199 m | map |
| Northrop Aircraft Div Ag Facil | 4 19I006360 | Terminated | 208 m | map |
| UPS Gardena Hub CAGAR | 4 19I002090 | Active | 214 m | map |
| McCormick - AMR Inglewood 15 | 4 19NNA003105 | No Action Required | 214 m | map |
| Morton Int | 4 19I002675 | Terminated | 224 m | map |
| Cox Die Casting | 4 19I004958 | Terminated | 225 m | map |
| AMK Design Inc | 4 19NEC014844 | Active | 236 m | map |
| Hawthorne - El Segundo Blvd (Site 3911) | 4 19NNA003176 | No Action Required | 241 m | map |
| Stones Metal Shop | 4 19NEC001949 | Terminated | 248 m | map |
| JP & W America Incorporation | 4 19NEC005480 | Active | 248 m | map |
154 facilities, nearest first. Page 1 of 4: next
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.