Industrial stormwater facility

Universal Molding Co Inc

WDID 4 19I014397 · Notice of Intent · Lynwood, Los Angeles

SIC 3341 · Secondary Smelting and Refining of Nonferrous Metals · Regional Board 4 - Los Angeles Region

Official record — State Water Resources Control Board, Industrial General Permit

SMARTS monitoring

No reported results for this WDID

Above NAL (derived)

No derived NAL evaluation available

TMDL requirements

Water Board-stated limits across 0 TMDLs

303(d) associations

Derived geographic association — not confirmed discharge

Hydrologic

Geographic context

Official facility coordinate plotted against the associated Final 2026 Integrated Report impaired-water geometry.

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Facility location (official coordinate)
Associated impaired-water geometry (Final 2026 Integrated Report)
YDOS-derived geographic context
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Geometry shown is limited to waterbodies geographically associated with this facility. Geographic association does not establish a discharge connection, receiving-water connectivity, or causation.

Official facility point: 33.93671, -118.22137
HUC12 subwatershed: Compton Creek-Los Angeles River
HUC12 code: 180701050402
Impaired-water associations (derived): 6

Intelligence summary

What is available for this facility across the connected datasets.

SMARTS monitoringNo reported results for this WDIDSMARTS source-reported Numeric Action Level (NAL) contextNo NAL comparison availableYDOS-derived TMDL requirementsNo TMDL requirements recorded in SMARTSSMARTS source-stated 303(d) context6 geographically associated impaired watersAssociation does not establish a discharge connection.YDOS-derived

Official

Facility record

Facility name: Universal Molding Co Inc
WDID: 4 19I014397
Application type: Notice of Intent
City: Lynwood
County: Los Angeles
ZIP: 90262
Primary SIC code: 3341
SIC description: Secondary Smelting and Refining of Nonferrous Metals
Date active: 1998-07-14
Regional Water Board: Regional Board 4 - Los Angeles Region

303(d) context

Associated impaired waters

Grouped by derived geographic association class.

Derived

Same impaired-water subwatershed

6 waterbodies

Compton Creek

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (8) Aluminum, Benthic Community Effects, Copper, Indicator Bacteria, Lead, pH +2 more

Distance —

Confidence low

Fact sheet ↗

Earvin Magic Johnson Park Lakes (Los Angeles County)

Lake & Reservoir · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (1) Mercury

Distance —

Confidence low

Fact sheet ↗

Los Angeles River Estuary (Queensway Bay)

Estuary · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (11) Chlordane, Copper, DDT (Dichlorodiphenyltrichloroethane), DDT (sediment), Indicator Bacteria, Oxygen, Dissolved +5 more

Distance —

Confidence low

Fact sheet ↗

Los Angeles River Reach 1 (Estuary to Carson Street)

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (24) Aluminum, Ammonia, Bifenthrin, Copper, Copper, Dissolved, Cyanide +18 more

Distance —

Confidence low

Fact sheet ↗

Los Angeles River Reach 2 (Carson to Figueroa Street)

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (9) Ammonia, Copper, Indicator Bacteria, Lead, Nutrients (Algae), Oil +3 more

Distance —

Confidence low

Fact sheet ↗

Rio Hondo Reach 1 (Confl. LA River to Snt Ana Fwy)

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (8) Copper, Indicator Bacteria, Lead, Oil and Grease, pH, Toxicity +2 more

Distance —

Confidence low

Fact sheet ↗

Associations are calculated from official facility coordinates, USGS HUC12 boundaries, and official 2026 impaired-water geometry. They do not establish a discharge connection or causation.

TMDL requirements (6)

Numeric effluent limits and action levels stated by the Water Board for this permit, with the receiving water named in the TMDL.

Official record — SMARTS TMDL dataset, State Water Board

Stated requirements: 6
TMDLs: 2
Regulated parameters: 6
Limit due dates: 2020-07-01 – 2020-07-01
Includes interim limits: No
Source regional dataset: Region 4 - Los Angeles
Source retrieved: Sep 24, 2026

Official SMARTS public reports ↗

Los Angeles River Metals TMDL

Receiving water named in TMDL Los Angeles River and Los Angeles River Tributaries

3 limits

Parameter	Limit type	Period	Basis	Limit	Due date	Reported results for parameter
Copper, TotalVocabulary match: Copper (narrower)	NEL	FINAL	INSTANTANEOUS	.06749 mg/L	2020-07-01	78 results · latest 2026-02-16
Lead, TotalVocabulary match: Lead (narrower)	NEL	FINAL	INSTANTANEOUS	.094 mg/L	2020-07-01	84 results · latest 2026-02-16
Zinc, TotalVocabulary match: Zinc (narrower)	NEL	FINAL	INSTANTANEOUS	.159 mg/L	2020-07-01	84 results · latest 2026-02-16

Los Angeles River Nitrogen TMDL

Receiving water named in TMDL Los Angeles River Watershed

3 limits

Parameter	Limit type	Period	Basis	Limit	Due date	Reported results for parameter
Nitrate, Total (as N)Vocabulary match: Nitrate (alias)	NEL	FINAL	INSTANTANEOUS	8 mg/L	2020-07-01	44 results · latest 2026-02-16
Nitrite Plus Nitrate (as N)Vocabulary match: Nitrate/Nitrite (Nitrite + Nitrate as N) (exact)	NEL	FINAL	INSTANTANEOUS	8 mg/L	2020-07-01	76 results · latest 2026-02-16
Nitrite, Total (as N)Vocabulary match: Nitrogen, Nitrite (alias)	NEL	FINAL	INSTANTANEOUS	1 mg/L	2020-07-01	44 results · latest 2026-02-16

Derivedapplies only to the 303(d) waterbody link and the parameter vocabulary match.

Limit values, limit periods, parameters, TMDL names and receiving-water names are reproduced exactly as stated by the Water Board in SMARTS. California Stormwater Intelligence does not compare reported monitoring results to these limits and makes no exceedance, violation or compliance determination. Where a stated receiving-water name is linked to a 2026 303(d) waterbody, that link is a derived exact-name match, not a Water Board determination.

Official monitoring

SMARTS monitoring

Self-reported industrial stormwater sampling results as submitted by the discharger to SMARTS.

Official record — SMARTS parameter data, State Water Board

Reported results: 822
Sample events: 42
Distinct parameters: 13
Reporting years: 2015 – 2025
First sample: 2015-12-22
Latest sample: 2026-02-16
Source regional dataset: Region 4 - Los Angeles
Source retrieved: Aug 21, 2026

Official SMARTS public reports ↗

Parameters reported

Reported results over time

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Most recent reported results

Latest 25 of 822

Sample date	Location	Parameter	Result	Units	Event
2026-02-16	#1 North Discharge	Aluminum	.496	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Aluminum	.496	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Copper	.0145	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Copper	.0145	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Iron	.27	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Iron	.27	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Lead	.0031	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Lead	.0031	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Nitrate	.07	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Nitrate	.07	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Nitrate/Nitrite (Nitrite + Nitrate as N)	.11	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Nitrate/Nitrite (Nitrite + Nitrate as N)	.11	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Nitrogen, Nitrite	ND —(non-detect / est.)	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Nitrogen, Nitrite	ND —(non-detect / est.)	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Oil and Grease	ND —(non-detect / est.)	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Oil and Grease	ND —(non-detect / est.)	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	pH	6	SU	Qualifying Storm Event
2026-02-16	#1 North Discharge	pH	6	SU	Qualifying Storm Event
2026-02-16	#1 North Discharge	Total Suspended Solids (TSS)	ND —(non-detect / est.)	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Total Suspended Solids (TSS)	ND —(non-detect / est.)	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Zinc	.583	mg/L	Qualifying Storm Event
2026-02-16	#1 North Discharge	Zinc	.583	mg/L	Qualifying Storm Event
2026-02-16	#2 Center Driveway	Aluminum	.575	mg/L	Qualifying Storm Event
2026-02-16	#2 Center Driveway	Aluminum	.575	mg/L	Qualifying Storm Event
2026-02-16	#2 Center Driveway	Copper	.0176	mg/L	Qualifying Storm Event

Monitoring rows are official self-reported SMARTS submissions, joined to this facility by WDID. California Stormwater Intelligence does not restate, correct, average or evaluate reported values, and no benchmark comparison or violation determination is made.

YDOS-derived

Numeric Action Level comparison

Reported SMARTS analytical results compared against the Numeric Action Levels of the Industrial General Permit version in effect for each reporting year (July 1 – June 30).

Derived

Reporting years evaluated: 10
Years with an NAL exceedance: 9
Most recent evaluated year: RY 2025
Ruleset: igp_nal_ruleset_v1 / igp_nal_v1

Parameter	NAL type	Calculated value	NAL	Result	Samples used	Method
Aluminum, Total aluminum_total	Annual	0.588 mg/L	0.75 mg/L	At or below NALAnnual average of 8 eligible result(s) compared with the annual NAL.0.78× threshold	8 eligible	arithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported)
Copper, Total copper_total	Annual	0.041 mg/L	0.033 mg/L	Above NALAnnual average of 8 eligible result(s) compared with the annual NAL.1.23× threshold	8 eligible	arithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported)
Iron, Total iron_total	Annual	0.585 mg/L	1 mg/L	At or below NALAnnual average of 8 eligible result(s) compared with the annual NAL.0.58× threshold	8 eligible	arithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported)
Lead, Total lead_total	Annual	0.005 mg/L	0.262 mg/L	At or below NALAnnual average of 8 eligible result(s) compared with the annual NAL.0.02× threshold	8 eligible	arithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported)
Nitrite Plus Nitrate (as N) nitrate_nitrite_n	Annual	0.115 mg/L as N	0.68 mg/L as N	At or below NALAnnual average of 4 eligible result(s) compared with the annual NAL.0.17× threshold	4 eligible	arithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported)
Oil and Grease oil_grease	Instantaneous maximum	—0 samples above	25 mg/L	At or below NALNo eligible result in this reporting year was outside the instantaneous maximum NAL.	8 eligible8 non-detect as zero	count of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year
pH ph	Instantaneous maximum	—0 samples above	6 – 9 pH units	Within NAL rangeNo eligible result in this reporting year was outside the instantaneous maximum NAL.	8 eligible	count of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year
Total Suspended Solids (TSS) tss	Instantaneous maximum	—0 samples above	400 mg/L	At or below NALNo eligible result in this reporting year was outside the instantaneous maximum NAL.	8 eligible4 non-detect as zero	count of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year
Zinc, Total zinc_total	Annual	1.659 mg/L	0.26 mg/L	Above NALAnnual average of 8 eligible result(s) compared with the annual NAL.6.38× threshold	8 eligible	arithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported)

YDOS-derived overlap

Pollutant overlap with impaired receiving waters

Parameters where this facility has an NAL exceedance in at least one reporting year and the geographically associated waterbody carries a 303(d) listing for the same pollutant.

Derived

AluminumMonitoringAbove NAL303(d) impairmentCompton Creek

5 reporting years above the annual NAL, most recently RY 2022 · 1 303(d) listing · association: derived watershed association (low confidence)

AluminumMonitoringAbove NAL303(d) impairmentLos Angeles River Reach 1 (Estuary to Carson Street)

5 reporting years above the annual NAL, most recently RY 2022 · 1 303(d) listing · association: derived watershed association (low confidence)

CopperMonitoringAbove NAL303(d) impairmentCompton Creek

5 reporting years above the annual NAL, most recently RY 2025 · 1 303(d) listing · 1 stated TMDL requirement · association: derived watershed association (low confidence)

CopperMonitoringAbove NAL303(d) impairmentLos Angeles River Estuary (Queensway Bay)

5 reporting years above the annual NAL, most recently RY 2025 · 1 303(d) listing · 1 stated TMDL requirement · association: derived watershed association (low confidence)

CopperMonitoringAbove NAL303(d) impairmentLos Angeles River Reach 1 (Estuary to Carson Street)

5 reporting years above the annual NAL, most recently RY 2025 · 1 303(d) listing · 1 stated TMDL requirement · association: derived watershed association (low confidence)

CopperMonitoringAbove NAL303(d) impairmentLos Angeles River Reach 2 (Carson to Figueroa Street)

5 reporting years above the annual NAL, most recently RY 2025 · 1 303(d) listing · 1 stated TMDL requirement · association: derived watershed association (low confidence)

CopperMonitoringAbove NAL303(d) impairmentRio Hondo Reach 1 (Confl. LA River to Snt Ana Fwy)

5 reporting years above the annual NAL, most recently RY 2025 · 1 303(d) listing · 1 stated TMDL requirement · association: derived watershed association (low confidence)

IronMonitoringAbove NAL303(d) impairmentLos Angeles River Reach 1 (Estuary to Carson Street)

1 reporting year above the annual NAL, most recently RY 2015 · 1 303(d) listing · association: derived watershed association (low confidence)

Oil and GreaseMonitoringAbove NAL303(d) impairmentLos Angeles River Reach 1 (Estuary to Carson Street)

1 reporting year above the instantaneous maximum NAL, most recently RY 2019 · 1 303(d) listing · association: derived watershed association (low confidence)

Oil and GreaseMonitoringAbove NAL303(d) impairmentLos Angeles River Reach 2 (Carson to Figueroa Street)

1 reporting year above the instantaneous maximum NAL, most recently RY 2019 · 1 303(d) listing · association: derived watershed association (low confidence)

Oil and GreaseMonitoringAbove NAL303(d) impairmentRio Hondo Reach 1 (Confl. LA River to Snt Ana Fwy)

1 reporting year above the instantaneous maximum NAL, most recently RY 2019 · 1 303(d) listing · association: derived watershed association (low confidence)

ZincMonitoringAbove NAL303(d) impairmentCompton Creek