Mendocino Coast HU, Navarro River HA
2026 303(d) list Waterbody ID CAR1135007719980709093957 River & Stream Region 1 · North Coast
At a glance
- 2026 listing Evidence: State-published
- On the 2026 303(d) list · 5 Appendix A decisions
- Category 5: a TMDL is required
- What a listing means
- Pollutants and stressors
- 5 pollutants in 4 Appendix A categories
- Metals (1) · Other Cause (1) · SALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES (1) · Sediment (2)
- Listing decisions
- TMDL information Evidence: State-published
- 5 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
- 24 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
- 5
- 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 |
|---|---|---|---|---|---|---|
| Nickel | Metals | 5 | Do Not Delist from 303(d) list (TMDL required list) | Revised | A Source Unknown | 157317 |
Other Cause (1 decision)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Temperature, water | Other Cause | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Revised | Agricultural Return Flows Agriculture Drainage/Filling Of Wetlands Flow Alteration/Regulation/Modification Habitat Modification Nonpoint Source Removal of Riparian Vegetation Resource Extraction Streambank Modification/Destabilization Water Diversions | 155308 |
SALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES (1 decision)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Specific Conductivity | SALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES | 5 | List on 303(d) list (TMDL required list) | Revised | A Source Unknown | 163043 |
Sediment (2 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) | Original | Agriculture Agriculture-grazing Channel Erosion Construction/Land Development Disturbed Sites (Land Develop.) Drainage/Filling Of Wetlands Erosion/Siltation Flow Alteration/Regulation/Modification Habitat Modification Harvesting, Restoration, Residue Management Highway/Road/Bridge Construction Irrigated Crop Production Land Development Logging Road Construction/Maintenance Nonirrigated Crop Production Nonpoint Source Range Grazing-Riparian Range Grazing-Riparian and/or Upland Range Grazing-Upland Removal of Riparian Vegetation Resource Extraction Silvicultural Point Sources Silviculture Specialty Crop Production Streambank Modification/Destabilization Water Diversions | 168902 |
| Sedimentation/Siltation | Sediment | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | Original | Agriculture Agriculture-grazing Channel Erosion Construction/Land Development Disturbed Sites (Land Develop.) Drainage/Filling Of Wetlands Erosion/Siltation Flow Alteration/Regulation/Modification Habitat Modification Harvesting, Restoration, Residue Management Highway/Road/Bridge Construction Irrigated Crop Production Land Development Logging Road Construction/Maintenance Nonirrigated Crop Production Nonpoint Source Range Grazing-Riparian Range Grazing-Riparian and/or Upland Range Grazing-Upland Removal of Riparian Vegetation Resource Extraction Silvicultural Point Sources Silviculture Specialty Crop Production Streambank Modification/Destabilization Water Diversions | 69762 |
TMDL information Evidence: State-published
| Pollutant | TMDL requirement status | TMDL project | Priority | USEPA approval of TMDL | Expected attainment |
|---|---|---|---|---|---|
| Nickel | 5A | — | Low | — | — |
| Sediment | 5B | Navarro River Temperature | — | 2000-02-01 | — |
| Sedimentation/Siltation | 5B | Navarro River Sediment | — | 2000-02-01 | — |
| Specific Conductivity | 5A | — | Low | — | — |
| Temperature, water | 5B | Navarro River Temperature | — | 2000-12-27 | — |
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 Rancheria Creek 180101080401
- Lower Rancheria Creek 180101080402
- Anderson Creek 180101080403
- Indian Creek 180101080404
- North Branch North Fork Navarro River 180101080405
- South Branch North Fork Navarro River 180101080406
- North Fork Navarro River 180101080407
- Upper Navarro River 180101080408
- Lower Navarro River 180101080409
- Soda Spring Creek-Dry Creek 180101100502
Overlapping the waterbody's shape Evidence: spatial
- Upper Rancheria Creek 180101080401 also published
- Lower Rancheria Creek 180101080402 also published
- Anderson Creek 180101080403 also published
- Indian Creek 180101080404 also published
- North Branch North Fork Navarro River 180101080405 also published
- South Branch North Fork Navarro River 180101080406 also published
- North Fork Navarro River 180101080407 also published
- Upper Navarro River 180101080408 also published
- Lower Navarro River 180101080409 also published
- Soda Spring Creek-Dry Creek 180101100502 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 |
|---|---|---|---|---|
| MRC Navarro | 1 23I014398 | Terminated | 33 m | map |
| Johnson Quarry | 1 23I025549 | Active | 47 m | map |
| Silver Oak Wine Cellars LLC | 1 23NEC005587 | Active | 90 m | map |
| Handley Cellars | 1 23I014051 | Terminated | 90 m | map |
| Handley Cellars | 1 23NEC001890 | Active | 90 m | map |
| Navarro Vineyards | 1 23I014133 | Active | 95 m | map |
| Goldeneye | 1 23I018528 | Active | 108 m | map |
| Roederer Estate Inc | 1 23I014157 | Terminated | 136 m | map |
| Roederer Estate Inc | 1 23I029515 | Active | 136 m | map |
| Roederer Estate Inc | 1 23NEC003756 | Terminated | 136 m | map |
| Anderson Valley Brewing Company | 1 23NEC005908 | Terminated | 158 m | map |
| Handley Cellars | 1 23NEC001871 | Terminated | 218 m | map |
| Domaine Anderson Winery | 1 23I030321 | Terminated | 220 m | map |
| I & E Lath Mill | 1 23I010772 | Active | 226 m | map |
| Husch Vineyards - Philo | 1 23I013869 | Terminated | 239 m | map |
| Husch Vineyards - Philo | 1 23NEC001762 | Active | 239 m | map |
| Lazy Creek Vineyards | 1 23I026600 | Terminated | 247 m | map |
| RJS Timber | 1 23I017047 | Terminated | 283 m | map |
| Confluence | 1 23NEC002547 | Active | 346 m | map |
| Anderson Valley Brewing Company | 1 23NEC015173 | Active | 375 m | map |
| Anderson Valley Brewing | 1 23NEC000189 | Terminated | 393 m | map |
| Greenwood Aggregates | 1 23I025425 | Active | 404 m | map |
| Goldeneye | 1 23I018529 | Terminated | 416 m | map |
| Scharffenberger Cellars | 1 23I030320 | Active | 578 m | map |
24 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.