Industrial stormwater facility
4 19I005196 · Notice of Intent · Wilmington, Los Angeles
Official
Hydrologic
Official facility coordinate plotted against the official 2026 impaired-water geometry.
303(d) context
Grouped by derived geographic association class.
Bay & Harbor · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (8) Benthic Community Effects, Copper, DDD (Dichlorodiphenyldichloroethane), DDE (Dichlorodiphenyldichloroethylene), DDT (Dichlorodiphenyltrichloroethane), PCBs (Polychlorinated biphenyls) +2 more
Estuary · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (16) Benthic Community Effects, Benzo(a)anthracene, Benzo(a)pyrene, Chlordane, Chlordane (tissue), Chrysene (C1-C4) +10 more
Distance —
Confidence low
Bay & Harbor · Integrated Report category 4a · TMDL approved by USEPA
Listed pollutants / stressors (5) Chlordane, Copper, DDT (Dichlorodiphenyltrichloroethane), PCBs (Polychlorinated biphenyls), Toxicity
Bay & Harbor · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (30) 2-Methylnaphthalene, Benthic Community Effects, Benzo(a)anthracene, Benzo(a)pyrene, Cadmium, Cadmium (sediment) +24 more
Lake & Reservoir · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (12) Algae, Ammonia, ChemA, Chlordane, Chlordane (tissue), Chlorophyll-a +6 more
River & Stream · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (2) Copper, Indicator Bacteria
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.
Numeric effluent limits and action levels stated by the Water Board for this permit, with the receiving water named in the TMDL.
Receiving water named in TMDL Los Angeles Harbor (Inner Cabrillo Beach and Main Ship Channel)
| Parameter | Limit type | Period | Basis | Limit | Due date | Reported results for parameter |
|---|---|---|---|---|---|---|
| Enterococci MPNVocabulary match: Enterococcus (alias) | TMDL NAL | FINAL | INSTANTANEOUS | 104 MPN/100 mL | 2020-07-01 | 108 results · latest 2026-02-19 |
| Fecal Coliform | TMDL NAL | FINAL | INSTANTANEOUS | 400 MPN/100 mL | 2020-07-01 | 108 results · latest 2026-02-19 |
| Total Coliform | TMDL NAL | FINAL | INSTANTANEOUS | 1000 MPN/100 mL | 2020-07-01 | 108 results · latest 2026-02-19 |
| Total Coliform | TMDL NAL | FINAL | INSTANTANEOUS | 10000 MPN/100 mL | 2021-07-01 | 108 results · latest 2026-02-19 |
Receiving water named in TMDL R4 - Greater Los Angeles/Long Beach Harbor Waters
| Parameter | Limit type | Period | Basis | Limit | Due date | Reported results for parameter |
|---|---|---|---|---|---|---|
| Copper, TotalVocabulary match: Copper (narrower) | TMDL NAL | FINAL | INSTANTANEOUS | .0058 mg/L | 2032-05-05 | 486 results · latest 2026-02-19 |
| Lead, TotalVocabulary match: Lead (narrower) | TMDL NAL | FINAL | INSTANTANEOUS | .221 mg/L | 2032-05-05 | 482 results · latest 2026-02-19 |
| Zinc, TotalVocabulary match: Zinc (narrower) | TMDL NAL | FINAL | INSTANTANEOUS | .095 mg/L | 2032-05-05 | 486 results · latest 2026-02-19 |
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
Self-reported industrial stormwater sampling results as submitted by the discharger to SMARTS.
Loading reported results…
| Sample date | Location | Parameter | Result | Units | Event |
|---|---|---|---|---|---|
| 2026-02-19 | Location 1 | Aluminum | 2.8 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Aluminum | 2.8 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Ammonia as N, Total | .39 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Ammonia as N, Total | .39 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Arsenic | .0021 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Arsenic | .0021 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Cadmium | .0013 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Cadmium | .0013 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Chemical oxygen demand (COD) | 28.6 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Chemical oxygen demand (COD) | 28.6 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Copper | .043 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Copper | .043 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Cyanide | ND —(non-detect / est.) | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Cyanide | ND —(non-detect / est.) | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Enterococcus | 60 | MPN/100 mL | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Enterococcus | 60 | MPN/100 mL | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Fecal Coliform | 3.1 | MPN/100 mL | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Fecal Coliform | 3.1 | MPN/100 mL | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Iron | 5 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Iron | 5 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Lead | .11 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Lead | .11 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Magnesium, Total | 2.5 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Magnesium, Total | 2.5 | mg/L | Qualifying Storm Event |
| 2026-02-19 | Location 1 | Mercury | ND —(non-detect / est.) | ug/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
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).
| Parameter | NAL type | Calculated value | NAL | Result | Samples used | Method |
|---|---|---|---|---|---|---|
Aluminum, Total aluminum_total | Annual | 1.405 mg/L | 0.75 mg/L | Above NALAnnual average of 32 eligible result(s) compared with the annual NAL.1.87× threshold | 32 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) |
Ammonia, Total (as N) ammonia_n | Annual | 5.807 mg/L | 2.14 mg/L | Above NALAnnual average of 32 eligible result(s) compared with the annual NAL.2.71× threshold | 32 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) |
Arsenic, Total arsenic_total | Annual | 0.002 mg/L | 0.15 mg/L | At or below NALAnnual average of 28 eligible result(s) compared with the annual NAL.0.01× threshold | 28 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) |
Cadmium, Total cadmium_total | Annual | 5.25e-4 mg/L | 0.005 mg/L | At or below NALAnnual average of 30 eligible result(s) compared with the annual NAL.0.1× threshold | 30 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) |
Chemical Oxygen Demand (COD) cod | Annual | 28.89 mg/L | 120 mg/L | At or below NALAnnual average of 32 eligible result(s) compared with the annual NAL.0.24× threshold | 32 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 | 0.035 mg/L | 0.033 mg/L | Above NALAnnual average of 30 eligible result(s) compared with the annual NAL.1.07× threshold | 30 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) |
Cyanide, Total (as CN) cyanide_total | Annual | 0 mg/L | 0.022 mg/L | At or below NALAnnual average of 32 eligible result(s) compared with the annual NAL.0× threshold | 32 eligible32 non-detect as zero | 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 | 2.071 mg/L | 1 mg/L | Above NALAnnual average of 32 eligible result(s) compared with the annual NAL.2.07× threshold | 32 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 | 0.033 mg/L | 0.262 mg/L | At or below NALAnnual average of 30 eligible result(s) compared with the annual NAL.0.13× threshold | 30 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) |
Magnesium, Total magnesium_total | Annual | 1.167 mg/L | 0.064 mg/L | Above NALAnnual average of 32 eligible result(s) compared with the annual NAL.18.23× threshold | 32 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) |
Mercury, Total mercury_total | Annual | 3.00e-6 mg/L | 0.001 mg/L | At or below NALAnnual average of 32 eligible result(s) compared with the annual NAL.0× threshold | 32 eligible30 non-detect as zero | 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) |
Nickel, Total nickel_total | Annual | 0.005 mg/l | 1.02 mg/l | At or below NALAnnual average of 30 eligible result(s) compared with the annual NAL.0× threshold | 30 eligible2 non-detect as zero | 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 | 0.532 mg/L as N | 0.68 mg/L as N | At or below NALAnnual average of 26 eligible result(s) compared with the annual NAL.0.78× threshold | 26 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. | 32 eligible18 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. | 32 eligible | count of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year |
Phosphorus, Total (as P) phosphorus_total | Annual | 0.211 mg/L as P | 2 mg/L as P | At or below NALAnnual average of 32 eligible result(s) compared with the annual NAL.0.11× threshold | 32 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) |
Selenium, Total selenium_total | Annual | 2.33e-4 mg/L | 0.005 mg/L | At or below NALAnnual average of 32 eligible result(s) compared with the annual NAL.0.05× threshold | 32 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) |
Silver, Total silver_total | Annual | 1.20e-4 mg/L | 0.018 mg/L | At or below NALAnnual average of 30 eligible result(s) compared with the annual NAL.0.01× threshold | 30 eligible6 non-detect as zero | 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) |
Total Suspended Solids (TSS) tss | Instantaneous maximum | —2 samples above | 400 mg/L | Above NAL2 eligible results in this reporting year were outside the instantaneous maximum NAL. Two or more such results in one reporting year is the condition stated in the Order. | 32 eligible2 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 | 0.68 mg/L | 0.26 mg/L | Above NALAnnual average of 30 eligible result(s) compared with the annual NAL.2.62× threshold | 30 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
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.
CadmiumMonitoringAbove NAL303(d) impairmentLos Angeles Harbor - Consolidated Slip
1 reporting year above the annual NAL, most recently RY 2015 · 1 303(d) listing · association: derived watershed association (low confidence)
CopperMonitoringAbove NAL303(d) impairmentDominguez Channel Estuary (unlined portion below Vermont Ave)
10 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 - Long Beach Inner Harbor
10 reporting years above the annual NAL, most recently RY 2025 · 1 303(d) listing · 1 stated TMDL requirement · association: derived nearby in watershed (high confidence)
CopperMonitoringAbove NAL303(d) impairmentLos Angeles - Long Beach Outer Harbor inside breakwater
10 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 Harbor - Consolidated Slip
10 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) impairmentWilmington Drain
10 reporting years above the annual NAL, most recently RY 2025 · 1 303(d) listing · 1 stated TMDL requirement · association: derived watershed association (low confidence)
SilverMonitoringAbove NAL303(d) impairmentLos Angeles - Long Beach Inner Harbor
1 reporting year above the annual NAL, most recently RY 2018 · 1 303(d) listing · association: derived nearby in watershed (high confidence)
ZincMonitoringAbove NAL303(d) impairmentDominguez Channel Estuary (unlined portion below Vermont Ave)
11 reporting years above the annual NAL, most recently RY 2025 · 1 303(d) listing · 1 stated TMDL requirement · association: derived watershed association (low confidence)
ZincMonitoringAbove NAL303(d) impairmentLos Angeles Harbor - Consolidated Slip
11 reporting years above the annual NAL, most recently RY 2025 · 1 303(d) listing · 1 stated TMDL requirement · association: derived watershed association (low confidence)
Overlap is informational co-occurrence between a derived NAL comparison and an official 303(d) listing. It is not evidence that this facility caused or contributed to the impairment.
An NAL exceedance is a permit-defined condition that triggers Exceedance Response Actions under the Industrial General Permit. It is not a violation, an enforcement action, or a Water Board compliance determination. Annual values use the arithmetic average of eligible results with non-detects treated as zero; instantaneous maximum NALs (total suspended solids, oil and grease, pH) are exceeded when two or more eligible results in a reporting year fall outside the level. Rules transcribed from 2014-0057-DWQ as amended by 2015-0122-DWQ ↗ (effective 2015-07-01, superseded 2020-06-30); 2014-0057-DWQ as amended by 2018-0028-DWQ ↗ (effective 2020-07-01).
Provenance