Cucamonga Creek Reach 1 (Valley Reach)
2026 303(d) list Waterbody ID CAR8012100019990211101136 River & Stream Region 8 · Santa Ana
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
- TMDL information Evidence: State-published
- 4 decisions with a TMDL requirement status
- Status codes as published: 5A
- TMDL details
- Industrial stormwater facilities
- 12 report it as their receiving water Evidence: identification corroborated
- 364 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
- 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
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 |
|---|---|---|---|---|---|---|
| Cadmium | Metals | 5 | List on 303(d) list (TMDL required list) | Original | A Source Unknown | 77440 |
| Copper | Metals | 5 | List on 303(d) list (TMDL required list) | Original | A Source Unknown | 74065 |
| Lead | Metals | 5 | List on 303(d) list (TMDL required list) | Original | A Source Unknown | 78536 |
| Zinc | Metals | 5 | List on 303(d) list (TMDL required list) | Original | A Source Unknown | 73060 |
TMDL information Evidence: State-published
| Pollutant | TMDL requirement status | TMDL project | Priority | USEPA approval of TMDL | Expected attainment |
|---|---|---|---|---|---|
| Cadmium | 5A | — | Low | — | — |
| Copper | 5A | — | Low | — | — |
| Lead | 5A | — | Low | — | — |
| Zinc | 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
- Upper Cucamonga Creek 180702030704
- Lower Cucamonga Creek 180702030705
- Lower Chino Creek 180702030706
Overlapping the waterbody's shape Evidence: spatial
- Upper Cucamonga Creek 180702030704 also published
- Lower Cucamonga Creek 180702030705 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 |
|---|---|---|---|---|
| PASSPORT FOODS SVC LLC | 8 36I028710 | Terminated | 129 m | map |
| Passport Food Group LLC | 8 36I026514 | Terminated | 155 m | map |
| Passport Food Group LLC | 8 36IN602982 | Terminated | 155 m | map |
| Capitol Steel Products | 8 36I028998 | Terminated | 781 m | map |
| Doubleco Inc | 8 36I030431 | Active | 964 m | map |
| Barnmaster Supply LLC | 8 36I026165 | Active | 1.3 km | map |
| Southwest Mobile Storage | 8 36I030139 | Active | 1.4 km | map |
| Henry Company | 8 36I001081 | Terminated | 1.6 km | map |
| Agromin OC Ontario Green Material Composting Operation | 8 36I029779 | Active | 2.3 km | map |
| Agromin Green Material Composting Operation | 8 36I029489 | Active | 2.3 km | map |
| Intra Aerospace | 8 36I030677 | Active | 3.4 km | map |
| Master Services Inc | 8 36I029639 | Terminated | 3.6 km | map |
Receiving water reported by facility — waterbody identification corroborated by geographic evidence. 12 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 |
|---|---|---|---|---|
| Pac Fabrication | 8 36I003191 | Terminated | 186 m | map |
| Int'l Himalayan Pet Products LLc | 8 36NNA000515 | NEC Required | 207 m | map |
| Laporte Water Tech & Biochem | 8 36I009844 | Terminated | 207 m | map |
| Searing Ind Inc | 8 36I014189 | Active | 208 m | map |
| MVI ENGINEERING & MANUFACTURIN | 8 36NEC016308 | Active | 210 m | map |
| Ontario Ang Station | 8 36I006096 | Terminated | 212 m | map |
| DECOR ARTS INTERNATIONAL CORP | 8 36NEC004868 | Active | 214 m | map |
| HIGHWILD INC | 8 36NEC009594 | Terminated | 214 m | map |
| PBY Plastics Inc | 8 36NEC005166 | Active | 214 m | map |
| BMK PRECISION LLC | 8 36NEC008232 | Active | 217 m | map |
| AEROSPACE MILL PRODUCTS LLC | 8 36NNA000750 | NEC Required | 217 m | map |
| Christophers Forming | 8 36NNA001427 | NEC Required | 217 m | map |
| PMC MACHINE | 8 36NNA001657 | NEC Required | 217 m | map |
| Sign Industries Inc | 8 36I021099 | Active | 217 m | map |
| M&M Precision | 8 36NEC002180 | Terminated | 218 m | map |
| Ontario Truck Service | 8 36I030182 | Active | 226 m | map |
| Villa Park Trucking, Inc. | 8 36NNA002548 | No Action Required | 226 m | map |
| Performance Freight Systems Inc | 8 36IN601849 | Undetermined | 227 m | map |
| LC PENNER CO | 8 36NEC004707 | Terminated | 228 m | map |
| LC PENNER CO | 8 36NNA000673 | No Action Required | 228 m | map |
| BMK PRECISION | 8 36NEC002529 | Terminated | 229 m | map |
| Barron Precision | 8 36NEC002343 | Active | 229 m | map |
| SC MACHINING INC | 8 36NEC015672 | Active | 230 m | map |
| Feed The Children | 8 36IN601823 | Undetermined | 242 m | map |
| GC Warehouse | 8 36NNA001419 | NEC Required | 250 m | map |
| TNG Prologix | 8 36NEC002125 | Terminated | 256 m | map |
| American News Company LLC | 8 36NEC005312 | Active | 256 m | map |
| TNG Prologix | 8 36NNA000094 | No Action Required | 256 m | map |
| Delta Electronics Americas | 8 33NEC005354 | Active | 256 m | map |
| Doble Engineering | 8 36NEC009468 | Active | 261 m | map |
| LC Logistics Services INC | 8 36NEC007485 | Terminated | 263 m | map |
| Alpha Surplus Inc | 8 36IN601771 | Undetermined | 265 m | map |
| Chieftek Precision USA Co Ltd | 8 36NEC003672 | Active | 266 m | map |
| Northern Refrigerated Trans | 8 36I025267 | Active | 266 m | map |
| Landair Logistics Inc | 8 33NEC011003 | Active | 267 m | map |
| Nyx Machining LLC | 8 36NEC011689 | Terminated | 270 m | map |
| J&M Precision Machining LLC | 8 36NEC015428 | Active | 274 m | map |
| g&l cabinets | 8 36NEC012610 | Active | 274 m | map |
| Plastic Express | 8 36I010896 | Terminated | 276 m | map |
| Marten Transportation, Ltd. | 8 36I012737 | Terminated | 276 m | map |
| Villa Park Trucking Inc | 8 36I015531 | Terminated | 276 m | map |
| Material Flow Systems LLC | 8 36NEC006726 | Active | 283 m | map |
| DTC Computer Supplies | 8 36NEC016392 | Active | 286 m | map |
| Flamingo Dairy | 8 36I000223 | Terminated | 288 m | map |
| US ELOGISTICS SERVICE CORP | 8 36I031433 | Active | 288 m | map |
| SkyWest Airlines | 8 36NNA003498 | NONA Submitted | 289 m | map |
| 3V CNC MACHINE | 8 36NEC013120 | Active | 290 m | map |
| LC Logistics Services Merrill | 8 36NEC009849 | Active | 294 m | map |
| The Merchant of Tennis | 8 36I028867 | Active | 296 m | map |
| Liberty Ranch | 8 36I000052 | Terminated | 298 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.