California Stormwater Intelligence

← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Santa Margarita Lagoon

Waterbody ID (WBID): CAE9021100019990209155924
County / counties: San Diego
Regional Water Board: Regional Board 9 - San Diego Region
Waterbody type: Estuary
Condition category: Category 5 — 303(d) listed, TMDL required
Integrated Report cycle: 2026

303(d) listings (1)

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

Pollutant / stressor	Decision ID	Final listing decision	Decision status	TMDL requirement status	TMDL project	TMDL priority
EutrophicNutrients	151065	Do Not Delist from 303(d) list (associated with a USEPA accepted Advanced Restoration Plan)	Revised	5R — Being addressed by regional board action	Santa Margarita River Estuary and Watershed TMDL-alternative	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: Aug 21, 2026, 12:44 AM UTC
Waterbody ID: CAE9021100019990209155924
CALWNUM: 4901.530000, 4902.110000, 4903.110000
WBD code: 180703010404, 180703020504, 180703030504
Geometry: Official Water Board GIS (CA_WATERBOARDS_GIS_FINAL_2026)

View official Water Board fact sheet ↗Download Appendix A source file ↗

Location

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

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Watershed: —
Assessed size: 229.25 Acres

Derived facility associations

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

Derived

2270 Camino Vida Roble Suite V

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Abstract Ale Works LLC

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Ace Welding And Fabrication Inc

Oceanside · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Advanced Honeycomb Technologies Corporation

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

American Laser Fabrication Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

American Rim Supply Inc

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Amigo Custom Screen Prints

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Applied Composite Solutions inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Applied Composite Solutions Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Artience Lighting Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Avila Surfboards

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

AVS Fabrication Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

B and J Rubber Products LLC

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Belching Beaver Brewery

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

BMW Precision Machining Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Building 1 3021 Industry

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

California Hot Sauce Solutions

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

California Sensor Corporaton

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Calpex Plastics

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Carlsbad Self Storage LLC

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Carrillo Design Center

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Centricity Vision Inc

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Chics Custom Canvas

Oceanside · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Chuao Chocolatier

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Continental Machining & Tools

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Cottrell Machine

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Crystal Dynamics Aquarium Mfg

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Fallbrook · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Custom Converting Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Dan Dresner Cabinetry Inc

Vista · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Defense Logistics Agency Disposition Services Pendleton DLA DSP

Camp Pendleton · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Dream Rides Auto Parts

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Edge Tech Manufacturing Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Electro Mechanical Assembly Facility

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Emergency Storage LLC

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Encinitas Self Storage LLC

Encinitas · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Fallbrook Refuse Service

Fallbrook · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Fallbrook Water Reclamation Plant

Fallbrook · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

FedEx Ground ZOCE

Oceanside · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

GenMark Diagnostics

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

GenMark Diagnostics

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

GTR Enterprises Inc

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Hawkoon Fabrication INC

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

HTS Engineering Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Hydro Check Systems Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Industrial Strength Corp

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Industrial Strength Corp

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Intuitive Racing Inc dba Dew Machine Tool

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Jordan and Company LLC

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

KAPAN KENT COMPANY INCORPORATED

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Kinetics Noise Control

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

L F Industries Inc

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Landmark Mfg Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Lees Metal Recycling LP

Vista · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

LEGACY MACHINING METHODS INC

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Little Oaks Winery LLC

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Living Tea Brewing

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

LL Printers Carlsbad LLC

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Lunada Bay Concrete

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Main Recycling Center

Camp Pendleton · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Manzos Metal Works

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

McClellan Palomar

Carlsbad · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

McKenna Boiler Works Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Metal Lighthouse Incorporated

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

MH Custom Printing

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Molecular Matrix Inc

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Natel Engineering Company Inc

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

North Star Sensors LLC

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Northern Pine Brewing

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

oceanside ale works

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside Distillers

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside Ready Mix

Oceanside · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Olli Salumeria Americana LLC

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Precision Design & Fabricating Inc

Oceanside · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Precision One Medical

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

R&G Precision 1

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Revolution Roasters Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Rock Solid Stone

Fallbrook · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Rosemarys Mountain Quarry

Fallbrook · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Salis International Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

San Dieguito UHSD

Encinitas · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Schuman Enterprises Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

SenDx Medical Incorporated

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

South O Brewing Company

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

South Region Tertiary Treatment Plant SRTTP

Camp Pendleton · Notice of Intent · 0.73 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Southland Fabrication

Fallbrook · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Southwest Regional Fleet Transportation SWRFT

Camp Pendleton · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Sparsha Pharma USA Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Standard Filter Corporation

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Standish Precision Products

Fallbrook · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

STEICO Industries

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Strata Skin Sciences

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Stuart Mesa Coaster Maintenance

Oceanside · Notice of Intent · 0.81 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Oceanside · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Superior Machined Products Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Carlsbad · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

True Grain Woodworks Inc

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

US Marine Corps Air Station MCAS

Camp Pendleton · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Veridiam Allied Swiss

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Waste Management of North County

Oceanside · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Weiland Sliding Doors and Windows

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

West Coast Plating

Oceanside · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Westlake Royal Roofing LLC

Oceanside · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Willard Marine Inc

Oceanside · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Carlsbad · 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.