Trinity River HU, Upper HA
2026 303(d) list Waterbody ID CAR1064000319990607101807 River & Stream Region 1 · North Coast
At a glance
- 2026 listing Evidence: State-published
- On the 2026 303(d) list · 2 Appendix A decisions
- Category 4a: addressed by a USEPA-approved TMDL
- What a listing means
- TMDL information Evidence: State-published
- 2 decisions with a TMDL requirement status; 2 name a TMDL project
- Status codes as published: 5B
- TMDL details
- Industrial stormwater facilities
- 0 report it as their receiving water Evidence: identification corroborated
- 4 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 4a.
- 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
- 2
- Integrated Report category
- 4a (addressed by a USEPA-approved TMDL)
- 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
- 1 — North Coast
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.
Sediment (2 decisions)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Sediment | Sediment | 4a | List on 303(d) list (being addressed by USEPA approved TMDL) | Original | Channel Erosion Dam Construction Erosion/Siltation Flow Alteration/Regulation/Modification Habitat Modification Harvesting, Restoration, Residue Management Hydromodification Logging Road Construction/Maintenance Mine Tailings Natural Sources Nonpoint Source Placer Mining Removal of Riparian Vegetation Resource Extraction Silviculture Streambank Modification/Destabilization Surface Mining | 169531 |
| Sedimentation/Siltation | Sediment | 4a | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Original | Channel Erosion Dam Construction Erosion/Siltation Flow Alteration/Regulation/Modification Habitat Modification Harvesting, Restoration, Residue Management Hydromodification Logging Road Construction/Maintenance Mine Tailings Natural Sources Nonpoint Source Placer Mining Removal of Riparian Vegetation Resource Extraction Silviculture Streambank Modification/Destabilization Surface Mining | 78099 |
TMDL information Evidence: State-published
| Pollutant | TMDL requirement status | TMDL project | Priority | USEPA approval of TMDL | Expected attainment |
|---|---|---|---|---|---|
| Sediment | 5B | Trinity River Sediment | — | 2001-12-20 | — |
| Sedimentation/Siltation | 5B | Trinity River Sediment | — | 2001-12-20 | — |
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
- North Fork Coffee Creek 180102110101
- Lower Coffee Creek 180102110103
- Tangle Blue Creek 180102110202
- Lower East Fork Trinity River 180102110304
- East Fork Stuart Fork 180102110402
- Lower Stuart Fork 180102110403
- Buckeye Creek-Trinity River 180102110502
- Bragdon Gulch-Trinity River 180102110503
- Papoose Creek-Trinity River 180102110504
- Mooney Gulch-Trinity River 180102110505
Overlapping the waterbody's shape Evidence: spatial
- North Fork Coffee Creek 180102110101 also published
- Upper Coffee Creek 180102110102
- Lower Coffee Creek 180102110103 also published
- High Camp Creek-Trinity River 180102110201
- Tangle Blue Creek 180102110202 also published
- Picayune Creek-Trinity River 180102110203
- Bear Creek-Trinity River 180102110204
- Eagle Creek-Trinity River 180102110205
- Lower East Fork Trinity River 180102110304 also published
- Upper Stuart Fork 180102110401
- East Fork Stuart Fork 180102110402 also published
- Lower Stuart Fork 180102110403 also published
- Swift Creek 180102110501
- Buckeye Creek-Trinity River 180102110502 also published
- Bragdon Gulch-Trinity River 180102110503 also published
- Papoose Creek-Trinity River 180102110504 also published
- Mooney Gulch-Trinity River 180102110505 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
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 |
|---|---|---|---|---|
| Trinity Lake Marinas | 1 53NEC003784 | Terminated | 265 m | map |
| Trinity Lake Marinas | 1 53NEC008059 | Active | 358 m | map |
| trinity alps marina | 1 53NEC003943 | Terminated | 434 m | map |
| Trinity alps marina | 1 53NEC004528 | Active | 434 m | map |
4 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.