Klamath River HU, Scott River HA
2026 303(d) list Waterbody ID CAR1054103519980707120412 River & Stream Region 1 · North Coast
At a glance
- 2026 listing Evidence: State-published
- On the 2026 303(d) list · 9 Appendix A decisions
- Category 5: a TMDL is required
- What a listing means
- Pollutants and stressors
- 9 pollutants in 5 Appendix A categories
- Metals (1) · Nutrients (2) · Other Cause (2) · Pathogens (1) · Sediment (3)
- Listing decisions
- TMDL information Evidence: State-published
- 9 decisions with a TMDL requirement status; 3 name a TMDL project
- Status codes as published: 5A, 5B
- TMDL details
- Industrial stormwater facilities
- 0 report it as their receiving water Evidence: identification corroborated
- 6 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
- 9
- 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
- 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
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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.
Metals (1 decision)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Aluminum | Metals | 5 | Do Not Delist from 303(d) list (TMDL required list) | Revised | A Source Unknown | 168857 |
Nutrients (2 decisions)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Biostimulatory Conditions | Nutrients | 5 | Do Not Delist from 303(d) list (TMDL required list) | Revised | A Source Unknown | 168858 |
| Oxygen, Dissolved | Nutrients | 5 | Do Not Delist from 303(d) list (TMDL required list) | Revised | A Source Unknown | 157115 |
Other Cause (2 decisions)
| 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 | 155235 |
| Temperature, water | Other Cause | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Revised | Agricultural Return Flows Agricultural Water Diversion Domestic Use of Ground Water Flow Alteration/Regulation/Modification Hydromodification Other Removal of Riparian Vegetation Streambank Modification/Destabilization Water Diversions | 157117 |
Pathogens (1 decision)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Indicator Bacteria | Pathogens | 5 | List on 303(d) list (TMDL required list) | Revised | A Source Unknown | 162991 |
Sediment (3 decisions)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Sediment | Sediment | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | Revised | Erosion/Siltation Flow Alteration/Regulation/Modification Habitat Modification Logging Road Construction/Maintenance Other Removal of Riparian Vegetation | 168859 |
| Sedimentation/Siltation | Sediment | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Original | Erosion/Siltation Flow Alteration/Regulation/Modification Habitat Modification Logging Road Construction/Maintenance Other Removal of Riparian Vegetation | 71923 |
| Turbidity | Sediment | 5 | List on 303(d) list (TMDL required list) | Revised | A Source Unknown | 157118 |
TMDL information Evidence: State-published
| Pollutant | TMDL requirement status | TMDL project | Priority | USEPA approval of TMDL | Expected attainment |
|---|---|---|---|---|---|
| Aluminum | 5A | — | Low | — | — |
| Biostimulatory Conditions | 5A | — | Low | — | — |
| Indicator Bacteria | 5A | — | Low | — | — |
| Oxygen, Dissolved | 5A | — | Low | — | — |
| pH | 5A | — | Low | — | — |
| Sediment | 5B | Scott River Sediment & Temperature | — | 2006-09-08 | — |
| Sedimentation/Siltation | 5B | Scott River Sediment & Temperature | — | 2006-09-08 | — |
| Temperature, water | 5B | Scott River Sediment & Temperature | — | 2006-09-08 | — |
| Turbidity | 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
- French Creek 180102080203
- Sugar Creek-Scott River 180102080204
- Patterson Creek 180102080401
- Hamlin Gulch-Scott River 180102080403
- Oro Fino Creek-Scott River 180102080503
- Sniktaw Creek-Scott River 180102080504
- Canyon Creek 180102080601
- Kelsey Creek 180102080603
- Tompkins Creek-Scott River 180102080604
- Mill Creek 180102080605
Overlapping the waterbody's shape Evidence: spatial
- Kohl Creek-Klamath River 180102061005
- Upper East Fork Scott River 180102080101
- Noyes Valley Creek 180102080102
- Lower East Fork Scott River 180102080103
- South Fork Scott River 180102080201
- McConaughy Gulch 180102080202
- French Creek 180102080203 also published
- Sugar Creek-Scott River 180102080204 also published
- Etna Creek 180102080205
- Clark Creek-Scott River 180102080206
- Upper Moffett Creek 180102080301
- McAdam Creek 180102080302
- Lower Moffett Creek 180102080303
- Patterson Creek 180102080401 also published
- Kidder Creek 180102080402
- Hamlin Gulch-Scott River 180102080403 also published
- Indian Creek 180102080501
- Shackleford Creek 180102080502
- Oro Fino Creek-Scott River 180102080503 also published
- Sniktaw Creek-Scott River 180102080504 also published
- Canyon Creek 180102080601 also published
- Boulder Creek-Scott River 180102080602
- Kelsey Creek 180102080603 also published
- Tompkins Creek-Scott River 180102080604 also published
- Mill Creek 180102080605 also published
- Town of Scott Bar-Scott River 180102080606
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 |
|---|---|---|---|---|
| Moores Gravel Inc | 1 47I021369 | Active | 5 m | map |
| Indian creek | 1 47I025662 | Active | 49 m | map |
| Menne Pit | 1 47I026021 | Terminated | 339 m | map |
| Menne Pit Gravel Operations | 1 47I020229 | Terminated | 343 m | map |
| Etna Brewing Company | 1 47NEC000927 | Terminated | 805 m | map |
| Etna Brewing Company | 1 47NEC009020 | Terminated | 809 m | map |
6 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.