Guadalupe River
2026 303(d) list Waterbody ID CAR2054005019980928160437 River & Stream Region 2 · San Francisco Bay
At a glance
- 2026 listing Evidence: State-published
- On the 2026 303(d) list · 8 Appendix A decisions
- Category 5: a TMDL is required
- What a listing means
- Pollutants and stressors
- 8 pollutants in 5 Appendix A categories
- Metals (1) · Other Cause (1) · Pesticides (4) · Total Toxics (1) · Trash (1)
- Listing decisions
- TMDL information Evidence: State-published
- 8 decisions with a TMDL requirement status; 5 name a TMDL project
- Status codes as published: 5A, 5B, 5C
- TMDL details
- Industrial stormwater facilities
- 6 report it as their receiving water Evidence: identification corroborated
- 232 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
- 8
- 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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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 | A Source Unknown | 145439 |
Other Cause (1 decision)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Benthic Community Effects | Other Cause | 5 | List on 303(d) list (TMDL required list) | Revised | A Source Unknown | 154157 |
Pesticides (4 decisions)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Bifenthrin | Pesticides | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | Revised | Other Urban Runoff Surface Runoff | 142015 |
| Chlordane | Pesticides | 5 | List on 303(d) list (TMDL required list) | Revised | A Source Unknown | 141983 |
| Diazinon | Pesticides | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Revised | A Source Unknown Other Urban Runoff Surface Runoff | 141990 |
| Pyrethroids | Pesticides | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | Revised | Other Urban Runoff Surface Runoff | 142010 |
Total Toxics (1 decision)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Toxicity | Total Toxics | 5 | List on 303(d) list (being addressed by USEPA approved TMDL) | Revised | Other Urban Runoff Surface Runoff | 142007 |
Trash (1 decision)
| Pollutant | Pollutant category | Category | Final listing decision | Decision status | Sources | Decision ID |
|---|---|---|---|---|---|---|
| Trash | Trash | 5 | Do Not Delist from 303(d) list (being addressed with action other than TMDL) | Original | A Source Unknown | 87599 |
TMDL information Evidence: State-published
| Pollutant | TMDL requirement status | TMDL project | Priority | USEPA approval of TMDL | Expected attainment |
|---|---|---|---|---|---|
| Benthic Community Effects | 5A | — | Low | — | — |
| Bifenthrin | 5B | San Francisco Bay Urban Creeks Diazinon | — | 2007-05-21 | — |
| Chlordane | 5A | — | Low | — | — |
| Diazinon | 5B | San Francisco Bay Urban Creeks Diazinon | — | 2007-05-16 | — |
| Mercury | 5B | Guadalupe River Watershed Mercury | — | 2010-06-01 | — |
| Pyrethroids | 5B | San Francisco Bay Urban Creeks Diazinon | — | 2007-05-21 | — |
| Toxicity | 5B | San Francisco Bay Urban Creeks Diazinon | — | 2007-05-21 | — |
| Trash | 5C | — | — | — | 2029 |
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
- Alamitos Creek 180500030301
- Canoas Creek 180500030302
- Los Gatos Creek 180500030303
- Guadalupe River 180500030304
- San Francisco Bay Estuaries-Frontal San Francisco Bay 180500041001
Overlapping the waterbody's shape Evidence: spatial
- Los Gatos Creek 180500030303 also published
- Guadalupe River 180500030304 also published
- San Francisco Bay Estuaries-Frontal San Francisco Bay 180500041001 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 |
|---|---|---|---|---|
| All Purpose Landfill | 2 43I006565 | Terminated | 521 m | map |
| Amazon com Services LLC DXC8 PKG SANJOSE6 | 2 43I030465 | Active | 553 m | map |
| Yellow Checker Cab | 2 43I006564 | Terminated | 744 m | map |
| Gerry S Foreign Warehouse | 2 43I012385 | Terminated | 1.1 km | map |
| Reed Graham Inc | 2 43I006692 | Active | 1.5 km | map |
| Usps Cambrian Park Sta | 2 43I014747 | Terminated | 3.3 km | map |
Receiving water reported by facility — waterbody identification corroborated by geographic evidence. 6 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 |
|---|---|---|---|---|
| Concentric Machining | 2 43NEC015611 | Active | 360 m | map |
| Novellus Systems | 2 43I009336 | Terminated | 362 m | map |
| Nu Metal Finishing Inc | 2 43I006686 | Terminated | 363 m | map |
| ARROYO AND SILVA CORPORATION | 2 43NEC013226 | Active | 377 m | map |
| Int Technical Assoc | 2 43I009933 | Terminated | 379 m | map |
| Inta Technologies LLC | 2 43I015420 | Terminated | 379 m | map |
| FAST STRUCT INC – Prefabrication Workshop | 2 43NNA003506 | NOI Required | 380 m | map |
| Guadalupe Division | 2 43I006812 | Active | 387 m | map |
| Specialized Daycare Services Inc dba My Friends | 2 43NNA001782 | No Action Required | 388 m | map |
| Phoenix Precision Machining | 2 43NEC014402 | Active | 393 m | map |
| Jefferson Smurfit Corp | 2 43I006634 | Terminated | 397 m | map |
| INTA Technologies Corporation | 2 43NEC000770 | Terminated | 398 m | map |
| INTA Technologies Corporation | 2 43NEC002477 | Terminated | 398 m | map |
| Western Digital Media | 2 43I006614 | Terminated | 403 m | map |
| Cisco Systems Inc Site 2 1 | 2 43NEC001619 | Active | 406 m | map |
| IMG INTA LLC | 2 43NEC009962 | Active | 412 m | map |
| Orbit Semiconductor | 2 43I013102 | Terminated | 414 m | map |
| Supertex Inc | 2 43I015071 | Terminated | 414 m | map |
| Paragon Electronic Systems Inc | 2 43I006980 | Terminated | 417 m | map |
| Sun Circuits Inc | 2 43I017774 | Terminated | 417 m | map |
| Weyerhaeuser Paper | 2 43I002178 | Terminated | 424 m | map |
| Cisco Systems Inc Site 2 | 2 43NEC001615 | Terminated | 431 m | map |
| ASML | 2 43NEC010834 | Active | 435 m | map |
| Intermolecular Incorporation | 2 43NEC002832 | Terminated | 446 m | map |
| QuantumScape | 2 43NEC000110 | Active | 448 m | map |
| Kormat | 2 43I006646 | Terminated | 450 m | map |
| Maxeon Americas Inc | 2 43I030049 | Active | 461 m | map |
| Ingenium Group LLC | 2 43NEC011785 | Active | 462 m | map |
| S&D Ceramics Ltd | 2 43I006990 | Terminated | 466 m | map |
| Veolia ES ES Technical Solutions LLC | 2 43NEC015711 | Active | 467 m | map |
| APCT INC | 2 43I022817 | Active | 468 m | map |
| DTEK MANUFACTURING main | 2 43NEC014405 | Active | 492 m | map |
| Alzeta Corp | 2 43I014801 | Terminated | 495 m | map |
| Roth Wood Products | 2 43NEC012088 | Active | 500 m | map |
| Br&F Spray | 2 43I005847 | Terminated | 501 m | map |
| SJ Valley Plating | 2 43I006876 | Active | 515 m | map |
| All Purpose Landfill | 2 43I006565 | Terminated | 521 m | map |
| Blue Ribbon Express | 2 43I004537 | Terminated | 523 m | map |
| TTM Technologies North America LLC | 2 43I022698 | Terminated | 529 m | map |
| TTM Technologies North America LLC | 2 43NEC011701 | Active | 529 m | map |
| Darko Precision Inc | 2 43I021339 | Terminated | 531 m | map |
| Darko Precision Inc | 2 43NEC003928 | Active | 531 m | map |
| Crystallume Corp | 2 43I015600 | Terminated | 541 m | map |
| Crystallume Corp | 2 43NEC000132 | Active | 541 m | map |
| Vw Used Parts | 2 43I006653 | Terminated | 543 m | map |
| San Jose City Martin Park Land | 2 43I006928 | Terminated | 546 m | map |
| San Jose City Martin Park Land | 2 43NEC000760 | Active | 546 m | map |
| TTM Technologies North America LLC | 2 43NEC004839 | Active | 548 m | map |
| Amazon com Services LLC DXC8 PKG SANJOSE6 | 2 43I030465 | Active | 553 m | map |
| Silicon Valley Elite Manufacturing | 2 43NEC014839 | Active | 556 m | map |
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.