Napa River, Mare Island Strait
2026 303(d) list Waterbody ID CAR2061000020160627048321 River & Stream Region 2 · San Francisco Bay
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 3 Appendix A categories
- Metals (1) · Pesticides (3) · Toxic Organics (1)
- Listing decisions
- TMDL information Evidence: State-published
- 5 decisions with a TMDL requirement status; 2 name a TMDL project
- Status codes as published: 5A, 5B
- TMDL details
- Industrial stormwater facilities
- 1 report it as their receiving water Evidence: identification corroborated
- 45 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
- 2 — San Francisco Bay
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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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 |
|---|---|---|---|---|---|---|
| Mercury | Metals | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | Original | A Source Unknown | 100336 |
Pesticides (3 decisions)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Chlordane | Pesticides | 5 | Do Not Delist from 303(d) list (TMDL required list) | Revised | A Source Unknown | 151297 |
| Dieldrin | Pesticides | 5 | Do Not Delist from 303(d) list (TMDL required list) | Revised | A Source Unknown | 151298 |
| Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD) | Pesticides | 5 | Do Not Delist from 303(d) list (TMDL required list) | Revised | A Source Unknown | 151604 |
Toxic Organics (1 decision)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| PCBs (Polychlorinated biphenyls) | Toxic Organics | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Revised | A Source Unknown | 143443 |
TMDL information Evidence: State-published
| Pollutant | TMDL requirement status | TMDL project | Priority | USEPA approval of TMDL | Expected attainment |
|---|---|---|---|---|---|
| Chlordane | 5A | — | Low | — | — |
| Dieldrin | 5A | — | Low | — | — |
| Mercury | 5B | San Francisco Bay Mercury | — | 2008-02-12 | — |
| PCBs (Polychlorinated biphenyls) | 5B | San Francisco Bay PCBs | — | 2010-03-29 | — |
| Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD) | 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
- Novato Creek-Frontal San Pablo Bay Estuaries 180500020801
- San Pablo Bay 180500020802
Overlapping the waterbody's shape Evidence: spatial
- Novato Creek-Frontal San Pablo Bay Estuaries 180500020801 also published
- San Pablo Bay 180500020802 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 |
|---|---|---|---|---|
| Vallejo Yard | 2 48I025409 | Terminated | 439 m | map |
Receiving water reported by facility — waterbody identification corroborated by geographic evidence. 1 facility.
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 |
|---|---|---|---|---|
| General Mills Operations Inc | 2 48I009110 | Terminated | 281 m | map |
| North Bay Operations Maintenance | 2 48I025340 | Active | 294 m | map |
| Vallejo Marine Craft | 2 48I030207 | Terminated | 310 m | map |
| CS Marine Constructors Inc | 2 48NEC013519 | Terminated | 322 m | map |
| Sperry Mill Group | 2 48I031042 | Active | 325 m | map |
| Leybold Materials Inc | 2 48I009346 | Terminated | 354 m | map |
| Axel Johnson Metals Inc | 2 48I011309 | Terminated | 354 m | map |
| Timet | 2 48I012664 | Terminated | 354 m | map |
| F&M Steel Fabricators Inc | 2 48I028850 | Active | 355 m | map |
| GS Hydraulic Hose Corporation | 2 48NEC009229 | Active | 382 m | map |
| Mare Island Dry dock | 2 48I026516 | Active | 384 m | map |
| 461 | 2 48I029994 | Terminated | 407 m | map |
| Mare Island Dry Dock LLC | 2 48I024531 | Terminated | 415 m | map |
| Graton Spirits Company LLC | 2 48I031104 | Active | 437 m | map |
| Vallejo Yard | 2 48I025409 | Terminated | 439 m | map |
| Kiewit Infrastructure West Co | 2 48I021496 | Terminated | 439 m | map |
| Yacht Masters Inc | 2 48I015816 | Terminated | 462 m | map |
| Vallejo Boat Works | 2 48I017547 | Terminated | 462 m | map |
| Abrasive Blasting Coating | 2 48I017609 | Active | 573 m | map |
| Jeffco Painting & Coating In | 2 48I017611 | Terminated | 573 m | map |
| Mare Island Reserve Center | 2 48I015724 | Terminated | 576 m | map |
| 7 Up Bottling | 2 48I009707 | Terminated | 589 m | map |
| XKT Engineering Inc | 2 48I031282 | Active | 598 m | map |
| XKT Engineering Inc | 2 48NEC008270 | Terminated | 598 m | map |
| Kreysler and Associates | 2 48NEC011645 | Terminated | 600 m | map |
| Bulldog Machine Inc | 2 48NEC015226 | Active | 601 m | map |
| Propercare Transportation | 2 48NNA002661 | No Action Required | 635 m | map |
| Cordeiro Vault Co Inc | 2 48I016830 | Terminated | 684 m | map |
| Syar Industries Inc Vallejo Bl | 2 48I005115 | Terminated | 735 m | map |
| Cipher Enterprises Incorporated | 2 48NEC008339 | Active | 763 m | map |
| MV Transportation Div 10 & 23 | 2 48I022517 | Terminated | 782 m | map |
| SMALLER HAULER | 2 48NNA001736 | No Action Required | 791 m | map |
| Bayshore Materials Inc | 2 48I019418 | Active | 807 m | map |
| Vallejo Brewing Company | 2 48NEC013717 | Active | 821 m | map |
| Times Herald | 2 48NNA002165 | No Action Required | 828 m | map |
| Transport Products Unlimited | 2 48NEC012820 | Active | 841 m | map |
| jr delivery service | 2 48NNA002280 | No Action Required | 857 m | map |
| CITY TAXI CAB COMPANY | 2 48I029205 | Active | 885 m | map |
| Cordeiro Vault Co Inc | 2 48I016831 | Active | 921 m | map |
| Northbay Transit Group Inc | 2 48NEC008562 | Active | 930 m | map |
| NORTHBAY TRANSIT | 2 48NEC014806 | Terminated | 930 m | map |
| Yellow Cab | 2 48NEC007371 | Active | 930 m | map |
| Alco Iron Metal Co | 2 48I013454 | Active | 946 m | map |
| Public Storage | 2 48NNA001230 | No Action Required | 983 m | map |
| Yellow Cab | 2 48I018151 | Terminated | 985 m | map |
45 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.