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Waterbody profile

Official Water Board record · 2026 cycle

San Mateo Creek, Lower

Waterbody ID (WBID)
CAR2044003320090202015405
County / counties
San Mateo
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 (5)

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
Benthic Community EffectsOther Cause154185List on 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
ChlordanePesticides143110List on 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
Indicator BacteriaPathogens148687List on 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
PyrethroidsPesticides143141List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLSan Francisco Bay Urban Creeks Diazinon—
ToxicityTotal Toxics143138Do Not Delist from 303(d) list (TMDL required list)Revised5A — TMDL still required—Low

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
CAR2044003320090202015405
CALWNUM
2204.400201, 2204.400303, 2204.400400
WBD code
180500040901, 180500041001
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
7.38 Miles

Derived facility associations

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

Derived
ABC CHAUFFEURED LIMOUSINES

San Mateo · No Exposure Certification · 0.42 km away

derived_receiving_water

Derived by California Stormwater Intelligence

ABF Freight System Inc

Oakland · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Central Concrete Supply

South San Francisco · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Durham School Services South San Francisco

South San Francisco · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Emma Bracher Aviation LLC

San Mateo · Notice of Non-Applicability · 0.94 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Falck Northern California

Hayward · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Green Planet 21

Oakland · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

MV Burlingame Div 267

Burlingame · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Pabco Gypsum Port

Redwood City · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

San Mateo Union High School District Bus Yard

San Mateo · Notice of Intent · 0.88 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Shred It Foster City

Foster City · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

SPACESONIC INC

Union City · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Trac Intermodal

San Lorenzo · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Zoetis LLC

Union City · No Exposure Certification

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.