Industrial stormwater facility
4 19NEC010766 · No Exposure Certification · South El Monte, Los Angeles
Official
Hydrologic
Official facility coordinate plotted against the official 2026 impaired-water geometry.
303(d) context
Grouped by derived geographic association class.
Lake & Reservoir · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (8) Ammonia, Chlorophyll-a, DDT (Dichlorodiphenyltrichloroethane), Mercury, Odor, PCBs (Polychlorinated biphenyls) +2 more
River & Stream · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (8) Copper, Indicator Bacteria, Lead, Oil and Grease, pH, Toxicity +2 more
River & Stream · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (2) Coliform Bacteria, Cyanide
River & Stream · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (5) Copper, Indicator Bacteria, Iron, Oxygen, Dissolved, Zinc
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 River Watershed
| 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 | None reported |
| Nitrite Plus Nitrate (as N)Vocabulary match: Nitrate/Nitrite (Nitrite + Nitrate as N) (exact) | NEL | FINAL | INSTANTANEOUS | 8 mg/L | 2020-07-01 | None reported |
| Nitrite, Total (as N)Vocabulary match: Nitrogen, Nitrite (alias) | NEL | FINAL | INSTANTANEOUS | 1 mg/L | 2020-07-01 | None reported |
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.
Self-reported industrial stormwater sampling results submitted to SMARTS.
No SMARTS monitoring results are recorded for this WDID in the statewide dataset.
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).
No reporting year for this WDID contains samples eligible for NAL comparison. That can mean no analytical results were reported, the reported parameters have no adopted NAL, or the samples were taken at locations that are not permitted discharge points.
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