Suisun Marsh Wetlands
2026 303(d) list Waterbody ID CAT2072400019980929145809 Wetland, Tidal 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 4 Appendix A categories
- Metals (1) · Nutrients (2) · Other Cause (1) · SALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES (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
- 2 report it as their receiving water Evidence: identification corroborated
- 88 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
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 (1 decision)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Mercury | Metals | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Revised | Historic Land Management Activities | 153024 |
Nutrients (2 decisions)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Nutrients | Nutrients | 5 | Do Not Delist from 303(d) list (TMDL required list) | Revised | A Source Unknown | 151291 |
| Organic Enrichment/Low Dissolved Oxygen | Nutrients | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | Revised | Historic Land Management Activities | 78582 |
Other Cause (1 decision)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Temperature, water | Other Cause | 5 | List on 303(d) list (TMDL required list) | Revised | A Source Unknown | 151500 |
SALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES (1 decision)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Salinity/TDS/Chlorides | SALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES | 5 | Do Not Delist from 303(d) list (TMDL required list) | Revised | A Source Unknown | 151292 |
TMDL information Evidence: State-published
| Pollutant | TMDL requirement status | TMDL project | Priority | USEPA approval of TMDL | Expected attainment |
|---|---|---|---|---|---|
| Mercury | 5B | Suisun Marsh Dissolved Oxygen and Mercury TMDL | — | 2018-12-31 | — |
| Nutrients | 5A | — | Low | — | — |
| Organic Enrichment/Low Dissolved Oxygen | 5B | Suisun Marsh Dissolved Oxygen and Mercury TMDL | — | 2018-12-31 | — |
| Salinity/TDS/Chlorides | 5A | — | Low | — | — |
| Temperature, water | 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
- Lucol Hollow-Frontal Suisun Bay Estuaries 180500010106
- Union Creek-Frontal Suisun Bay Estuaries 180500010107
- Laurel Creek-Frontal Suisun Bay 180500010108
- American Canyon-Frontal Suisun Bay Estuaries 180500010109
- Suisun Bay Estuaries-Frontal Suisun Bay 180500010401
- Suisun Bay Islands 180500010402
The published list is truncated in Appendix A; it is not a complete list of watersheds.
Overlapping the waterbody's shape Evidence: spatial
- Lucol Hollow-Frontal Suisun Bay Estuaries 180500010106 also published
- Union Creek-Frontal Suisun Bay Estuaries 180500010107 also published
- Laurel Creek-Frontal Suisun Bay 180500010108 also published
- American Canyon-Frontal Suisun Bay Estuaries 180500010109 also published
- Suisun Bay Estuaries-Frontal Suisun Bay 180500010401 also published
- Suisun Bay Islands 180500010402 also published
- Suisun Bay 180500010403
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 |
|---|---|---|---|---|
| Vision Recycling | 2 48I026707 | Active | 0 m | map |
| UPS Cordelia Center CACOR | 2 48I002013 | Terminated | 2.5 km | map |
Receiving water reported by facility — waterbody identification corroborated by geographic evidence. 2 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 |
|---|---|---|---|---|
| Underground Construction Co Inc | 2 48I010805 | Active | 0 m | map |
| CCL Organics LLC | 2 48I013556 | Terminated | 0 m | map |
| CE Toland Son | 2 48I020882 | Active | 0 m | map |
| Flowserve Corp | 2 48I021465 | Terminated | 0 m | map |
| ENV Environmental International Inc | 2 48I022879 | Terminated | 0 m | map |
| Linn Star Transfer | 2 48I023185 | Terminated | 0 m | map |
| Red Line Synthetic Oil Corp | 2 48I024700 | Terminated | 0 m | map |
| Red Line Synthetic Oil Corp | 2 48I024966 | Terminated | 0 m | map |
| CytoSport Inc | 2 48I025281 | Terminated | 0 m | map |
| Vision Recycling | 2 48I026707 | Active | 0 m | map |
| Union Pacific Railroad Suisun City | 2 48I028580 | Active | 0 m | map |
| Sigray Inc | 2 48I030997 | Terminated | 0 m | map |
| Red Line Synthetic Oil Corp | 2 48NEC000002 | Active | 0 m | map |
| Bio Rad Laboratories | 2 48NEC001211 | Terminated | 0 m | map |
| Linn Star Transfer | 2 48NEC001456 | Terminated | 0 m | map |
| LinnStar Transfer | 2 48NEC002153 | Terminated | 0 m | map |
| Kaneka Aerospace LLC | 2 48NEC004908 | Active | 0 m | map |
| ProForm Laboratories | 2 48NEC006679 | Active | 0 m | map |
| Alternative Biologics | 2 48NEC007538 | Terminated | 0 m | map |
| Flavor Insights | 2 48NEC007600 | Active | 0 m | map |
| Pacific Ozone Technologies | 2 48NEC007685 | Terminated | 0 m | map |
| RIX INDUSTRIES | 2 48NEC008813 | Active | 0 m | map |
| MDX3 | 2 48NEC009252 | Active | 0 m | map |
| Aerzen USA West Region | 2 48NEC014112 | Active | 0 m | map |
| Applied Materials XCT | 2 48NEC015992 | Active | 0 m | map |
| Timoli Group LLC | 2 48NEC016262 | Active | 0 m | map |
| Lonza Consumer Health Inc - Benicia | 2 48NNA000546 | NOI Required | 0 m | map |
| Pickett Racining | 2 48NNA000890 | No Action Required | 0 m | map |
| Metropolitan Van and Storage | 2 48NNA002108 | No Action Required | 0 m | map |
| Advanced Drainage Systems Inc | 2 48NNA002339 | Undetermined | 0 m | map |
| PODS Enterprises, LLC | 2 48NNA002386 | No Action Required | 0 m | map |
| Potrero Hills Landfill | 2 48I005448 | Terminated | 30 m | map |
| Custom Coils Inc | 2 48NEC009170 | Active | 46 m | map |
| Suisun Bay Reserve Fleet | 2 48I022609 | Active | 61 m | map |
| Clean Harbors San Jose LLC | 2 48I015015 | Active | 67 m | map |
| 1800PACKRAT Benicia | 2 48NEC013200 | Active | 68 m | map |
| Allios Inc | 2 48NEC009290 | Terminated | 70 m | map |
| Zephyr Express | 2 48NEC006433 | Active | 78 m | map |
| Benicia Yard | 2 48I006977 | Terminated | 91 m | map |
| Nature Health Science Inc | 2 48NNA000632 | No Action Required | 135 m | map |
| Bay Area Coffee inc | 2 48NEC006599 | Active | 163 m | map |
| Schoenstein & Co | 2 48NEC012206 | Active | 184 m | map |
| West Coast Fixtures | 2 48NEC006842 | Active | 195 m | map |
| PJs Junk Removal | 2 48NNA002256 | No Action Required | 210 m | map |
| Kwik Bond Polymers | 2 48I031493 | Active | 227 m | map |
| Rockwell Collins | 2 48I016358 | Active | 264 m | map |
| Roadway Express | 2 48I005851 | Terminated | 273 m | map |
| YRC Inc Benicia | 2 48I013490 | Terminated | 273 m | map |
| Thunderbird Redi Mix Inc | 2 48NEC014084 | Active | 276 m | map |
| Bay Area Metal Fabrication LLC | 2 48NEC007644 | Terminated | 299 m | map |
88 facilities, nearest first. Page 1 of 2: next
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.