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Waterbody profile

Official Water Board record · 2026 cycle

South San Ramon Creek subwatershed (Contra Costa and Alameda counties, Tributary to Arroyo de la Laguna)

Waterbody ID (WBID)
CAR2043007020210702040004
County / counties
Alameda, Contra Costa
Regional Water Board
Regional Board 2 - San Francisco Bay Region
Waterbody type
River & Stream
Condition category
Category 5 — 303(d) listed, TMDL required
Integrated Report cycle
2026

303(d) listings (6)

Each row is one official listing decision from Appendix A of the Final 2026 California Integrated Report. Source terminology is preserved as published.

Pollutant / stressorDecision IDFinal listing decisionDecision statusTMDL requirement statusTMDL projectTMDL priority
AmmoniaNutrients151021List on 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
Benthic Community EffectsOther Cause154195List on 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
BifenthrinPesticides144544List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLSan Francisco Bay Urban Creeks Diazinon—
CyfluthrinPesticides144550List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLSan Francisco Bay Urban Creeks Diazinon—
ImidaclopridPesticides144541List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLSan Francisco Bay Urban Creeks Diazinon—
PyrethroidsPesticides144537List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLSan Francisco Bay Urban Creeks Diazinon—

Source & provenance

Agency
California State Water Resources Control Board
Report
Final 2026 California Integrated Report
Dataset
Appendix A — 2026 303(d) List of Impaired Waters
Imported
Sep 16, 2026, 10:56 PM UTC
Waterbody ID
CAR2043007020210702040004
CALWNUM
2204.300704, 2204.300705, 2204.300706, 2204.300801, 2204.300806, 2204.300900
WBD code
180500040501, 180500040502
Geometry
Official Water Board GIS (CA_WATERBOARDS_GIS_FINAL_2026)

Location

Official 2026 Water Board geometry. Demonstration facility markers are shown for context only.

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Watershed
—
Assessed size
35.67 Miles

Derived facility associations

Industrial stormwater facilities geographically associated with this waterbody. These are derived spatial associations, not Water Board findings.

Derived
FedEx Express Corp LVKA

Pleasanton · Notice of Intent · 0.11 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Groceryworks Operating Company LLC

Danville · Notice of Non-Applicability · 0.06 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

San Ramon Valley Unified

San Ramon · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

UPS San Ramon CASNR

San Ramon · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Facility records are official Industrial General Permit registrations, but the association between a facility and this waterbody is derived geographically (proximity or shared HUC12 subwatershed) and is not a Water Board receiving-water determination. Where a permit carries a Water Board-stated TMDL requirement naming this water, it is listed separately above.