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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 requiredLow
ChlordanePesticides143110List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Indicator BacteriaPathogens148687List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
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 requiredLow

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
Aug 21, 2026, 12:44 AM 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.